阅读说明：本技术 锌铝镀层殷钢单线及其制备方法 (Zinc-aluminum coating invar steel single wire and preparation method thereof ) 是由 叶恺 杨怀 鞠霖 邓超 周瑾 吴飞 于 2021-08-30 设计创作，主要内容包括：本发明涉及一种锌铝镀层殷钢单线,包括殷钢芯线以及包覆在殷钢芯线外部的锌铝镀层；殷钢芯线含有以下组分：镍33.0～36.0wt%,铬0.5～0.8wt%,钴0.5～1.0wt%,钼1.0～1.2wt%,其他杂质元素总和≤0.10wt%,余量为铁；锌铝镀层含有以下组分：锌75～88wt%,其他杂质元素总和≤1.5wt%,余量为铝。经钢水熔炼、浇铸结晶、钢锭轧制、胚料拉拔、钢丝酸洗、钢丝清洗、钢丝预热、浸渍镀膜、成型冷却、线径检测与成圈收绕步骤得到锌铝镀层殷钢单线。本发明的锌铝镀层殷钢单线具有热膨胀系数小、耐高温、抗拉强度大且抗腐蚀等优点。(The invention relates to a zinc-aluminum plating invar steel single wire, which comprises an invar steel core wire and a zinc-aluminum plating layer coated outside the invar steel core wire; the invar core wire comprises the following components: 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, less than or equal to 0.10wt% of other impurity elements and the balance of iron; the zinc-aluminum coating contains the following components: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of aluminum. The single line of the zinc-aluminum coating invar steel is obtained through the steps of molten steel smelting, casting crystallization, steel ingot rolling, blank drawing, steel wire acid cleaning, steel wire preheating, dipping coating, forming cooling, wire diameter detection and looping winding. The zinc-aluminum plating layer invar single wire has the advantages of small thermal expansion coefficient, high temperature resistance, high tensile strength, corrosion resistance and the like.)

1. A zinc-aluminum plating layer invar steel single line comprises an invar steel core wire (1) and a zinc-aluminum plating layer (2) coated outside the invar steel core wire (1); the invar steel core wire (1) comprises the following components in percentage by mass: 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, less than or equal to 0.10wt% of other impurity elements and the balance of iron; the method is characterized in that: the zinc-aluminum coating (2) comprises the following components in percentage by mass: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of aluminum.

2. The single line of zinc-aluminum coated invar steel as claimed in claim 1, wherein: the diameter of the invar steel core wire (1) is 1.0-5.0 mm, and the thickness of the zinc-aluminum coating (2) is 0.10-0.35 mm.

3. The method for preparing a single line of zinc-aluminum coated invar steel as claimed in claim 1, wherein the method comprises the steps of:

s1, smelting molten steel: smelting molten steel by using an argon oxygen refining furnace, wherein alloy elements of the molten steel are controlled to be 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, the sum of other impurity elements is less than or equal to 0.10wt%, and the balance is iron;

s2, casting and crystallizing: pouring molten steel in the smelting furnace into a casting machine for continuous casting, wherein the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, the molten steel is continuously cast and cooled into an alloy steel ingot through a casting machine crystallization wheel, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1250 ℃;

s3, steel ingot rolling: leading out the hot alloy steel ingot, firstly, feeding the hot alloy steel ingot into a rough rolling unit for rough rolling, and then, feeding the hot alloy steel ingot into a finishing rolling unit for continuous rolling to form a round blank, wherein the diameter of the blank is 5.0-10 mm, and the blank is coiled and wound in a winding mode;

s4, blank drawing: drawing the looped blank into an invar core wire with the diameter of 1.0-5.0 mm by equipment, controlling the elongation rate in a drawing pass to be 1.05-1.20, and looping and winding the drawn invar core wire;

s5, steel wire pickling: spreading the looped invar core wire by a pay-off device and passing through a pickling tank, and removing the surface oxide of the invar core wire under the action of acid liquor;

s6, steel wire cleaning: leading the pickled invar steel core wires out, immediately leading the invar steel core wires into a water tank, cleaning the surfaces of the invar steel core wires under the action of ultrasonic waves and clear water, leading the invar steel core wires out of the water tank, drying the invar steel core wires by a blowing device, and controlling the wind temperature to be 40-60 ℃;

s7, preheating steel wires: preheating a dry invar steel core wire by an intermediate frequency furnace under the protection of protective gas, wherein the intermediate frequency furnace is provided with an invar steel core wire gas protection tube, the protective gas enters from a one-way air inlet valve at the bottom of the protection tube and is discharged through a top port of the protection tube, the protective gas is high-purity nitrogen or inert gas, the pressure range of the protective gas is 0.1-0.5 MPa, the preheating temperature of the invar steel core wire is controlled at 400-700 ℃, and the bottom port of the gas protection tube in the preheating of the intermediate frequency furnace extends into a hot-dip galvanized aluminum bath;

s8, dip coating: introducing the preheated invar steel core wire into a hot-dip galvanizing aluminum bath, and injecting the following components in percentage by mass into the hot-dip galvanizing aluminum bath: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of molten zinc-aluminum alloy of aluminum; controlling the temperature range of the zinc-aluminum alloy molten liquid to be 480-680 ℃, wherein the liquid level of the injected zinc-aluminum alloy molten liquid is higher than the bottom port of the protection tube, and the time for continuously routing and dipping the invar steel core wire in the hot-dip galvanizing aluminum bath pool is controlled to be 3-15 seconds;

s9, forming and cooling: continuously routing invar steel core wires in a hot dip galvanizing aluminum bath, vertically and upwardly leading out the invar steel core wires from a zinc-aluminum alloy melt, forming uniform zinc-aluminum coating films on the surfaces of the invar steel core wires by means of gravity and the adhesion of the alloy melt, controlling the thickness of the zinc-aluminum coating films by the routing speed, and cooling and curing the zinc-aluminum coating films by a cooling device after forming, thereby obtaining invar steel single wires of the zinc-aluminum coating layers;

s10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Technical Field

The invention belongs to the technical field of overhead conductors, and particularly relates to a zinc-aluminum coating invar steel single wire and a preparation method thereof.

Background

With the rapid development of national economy, the demand for electric power is increasing day by day, and the performance requirements for power transmission and transformation wires are also improved. In order to increase the transmission capacity of the line, line replacement of part of the power line is also started — replacing with a transmission conductor with higher current carrying capacity. The common conveying wire is a common steel-cored aluminum strand, the aluminum wire plays a role in conducting, the steel core plays a role in bearing load, the ground safety of a line is influenced due to the large thermal expansion coefficient of the steel core in high-temperature operation, the high-temperature operation capacity of the wire is limited, and the improvement of the current-carrying capacity of the line is limited.

Invar steel is high nickel-based low expansion coefficient alloy steel with 32-42% of nickel content, and is widely applied to aerospace, marine transportation and precision instruments and meters at present. In recent years, in a power transmission system, in order to improve the transmission capability of a specific line, invar is used as a reinforcing core of a special transmission wire, and the transmission capacity and high-temperature sag problems of the specific line are solved by utilizing the characteristics of small thermal expansion coefficient and high strength. The invar steel has certain corrosion resistance in dry air, but rust spots are very easy to appear in humid air, and the transmission lead is erected outdoors for a long time, so that the problem of rust spot corrosion needs to be solved.

At present, the surface of an invar steel wire is coated with an aluminum layer to improve the corrosion resistance of the invar steel wire, but the chemical components, the structural metallographic structure and the physical characteristics of the invar steel wire are difficult to realize by adopting a drawing process of coating the aluminum layer, the production cost is high, the performance stability is poor, and the popularization and the application of the invar steel wire in the field of electric overhead conductors are restricted. Solving the corrosion resistance of invar steel and reducing the manufacturing cost is a problem to be solved urgently by technical personnel in the industry.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a zinc-aluminum plating invar single wire with small thermal expansion coefficient, high temperature resistance, high tensile strength and corrosion resistance and a preparation method thereof.

According to the technical scheme provided by the invention, the zinc-aluminum coating invar steel single wire comprises an invar steel core wire and a zinc-aluminum coating coated outside the invar steel core wire; the invar steel core wire comprises the following components in percentage by mass: 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, less than or equal to 0.10wt% of other impurity elements and the balance of iron; the zinc-aluminum coating comprises the following components in percentage by mass: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of aluminum.

Preferably, the diameter of the invar core wire is 1.0-5.0 mm, and the thickness of the zinc-aluminum coating is 0.10-0.35 mm.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: smelting molten steel by using an argon oxygen refining furnace, wherein alloy elements of the molten steel are controlled to be 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, the sum of other impurity elements is less than or equal to 0.10wt%, and the balance is iron;

s2, casting and crystallizing: pouring molten steel in the smelting furnace into a casting machine for continuous casting, wherein the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, the molten steel is continuously cast and cooled into an alloy steel ingot through a casting machine crystallization wheel, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1250 ℃;

s3, steel ingot rolling: leading out the hot alloy steel ingot, firstly, feeding the hot alloy steel ingot into a rough rolling unit for rough rolling, and then, feeding the hot alloy steel ingot into a finishing rolling unit for continuous rolling to form a round blank, wherein the diameter of the blank is 5.0-10 mm, and the blank is coiled and wound in a winding mode;

s4, blank drawing: drawing the looped blank into an invar core wire with the diameter of 1.0-5.0 mm by equipment, controlling the elongation rate in a drawing pass to be 1.05-1.20, and looping and winding the drawn invar core wire;

s5, steel wire pickling: spreading the looped invar core wire by a pay-off device and passing through a pickling tank, and removing the surface oxide of the invar core wire under the action of acid liquor;

s6, steel wire cleaning: leading the pickled invar steel core wires out, immediately leading the invar steel core wires into a water tank, cleaning the surfaces of the invar steel core wires under the action of ultrasonic waves and clear water, leading the invar steel core wires out of the water tank, drying the invar steel core wires by a blowing device, and controlling the wind temperature to be 40-60 ℃;

s7, preheating steel wires: preheating a dry invar steel core wire by an intermediate frequency furnace under the protection of protective gas, wherein the intermediate frequency furnace is provided with an invar steel core wire gas protection tube, the protective gas enters from a one-way air inlet valve at the bottom of the protection tube and is discharged through a top port of the protection tube, the protective gas is high-purity nitrogen or inert gas, the pressure range of the protective gas is 0.1-0.5 MPa, the preheating temperature of the invar steel core wire is controlled at 400-700 ℃, and the bottom port of the gas protection tube in the preheating of the intermediate frequency furnace extends into a hot-dip galvanized aluminum bath;

s8, dip coating: introducing the preheated invar steel core wire into a hot-dip galvanizing aluminum bath, and injecting the following components in percentage by mass into the hot-dip galvanizing aluminum bath: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of molten zinc-aluminum alloy of aluminum; controlling the temperature range of the zinc-aluminum alloy molten liquid to be 480-680 ℃, wherein the liquid level of the injected zinc-aluminum alloy molten liquid is higher than the bottom port of the protection tube, and the time for continuously routing and dipping the invar steel core wire in the hot-dip galvanizing aluminum bath pool is controlled to be 3-15 seconds;

s9, forming and cooling: continuously routing invar steel core wires in a hot dip galvanizing aluminum bath, vertically and upwardly leading out the invar steel core wires from a zinc-aluminum alloy melt, forming uniform zinc-aluminum coating films on the surfaces of the invar steel core wires by means of gravity and the adhesion of the alloy melt, controlling the thickness of the zinc-aluminum coating films by the routing speed, and cooling and curing the zinc-aluminum coating films by a cooling device after forming, thereby obtaining invar steel single wires of the zinc-aluminum coating layers;

s10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Preferably, in step S1, the molten steel alloy elements are controlled to be 33.3-35.82 wt% of nickel, 0.506-0.792 wt% of chromium, 0.511-0.927 wt% of cobalt, 1.012-1.19 wt% of molybdenum, the total of other impurity elements is 0.038-0.087 wt%, and the balance is iron.

Preferably, in step S8, the following components are injected into the hot-dip galvanized aluminum bath in percentage by mass: 75.02-87.82 wt% of zinc, 0.95-1.42 wt% of other impurity elements, and the balance of aluminum.

The invention has the following advantages:

1. according to the invention, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt and 1.0-1.2 wt% of molybdenum alloy elements are introduced into the invar alloy. The corrosion resistance of the invar steel core wire is improved by the combined action of the alloy elements of chromium, cobalt and molybdenum, and the strength, hardness, toughness and temperature resistance of the invar steel core wire are improved. The invar steel core wire is continuously wired and coated in a high-temperature zinc-aluminum bath pool, the aluminum element is enriched on the surface layer of the invar steel core wire, so that the zinc-aluminum coating is more firmly attached to the surface of the invar steel core wire, and the zinc-aluminum comprehensive coating improves the corrosion resistance of the invar steel core wire.

2. The linear expansion coefficient of the zinc-aluminum plating invar steel single line provided by the invention is less than 3.8 multiplied by 10^-61/DEG C, tensile strength higher than 1000MPa, 100 times diameter capable of bearing more than 35 circles of continuous torsion, and the use of the overhead conductor to reinforce the core can ensure that the conductor can continuously run at high temperature of 300 ℃ and below.

3. The zinc-aluminum plating invar single wire provided by the invention is applied to the production of the overhead power transmission line, so that the transmission capacity of the wire is improved, the high-temperature sag of the power transmission line is controlled, the safe operation of the line is ensured, the service life of the line can be prolonged due to the excellent corrosion resistance, and great economic and social benefits are brought to the power transmission and transformation industry.

Drawings

Fig. 1 is a structural diagram of a zinc-aluminum plated invar single wire in the present invention.

FIG. 2 is a flow chart of a preparation process of a zinc-aluminum plated invar single line in the invention.

Figure 3 is a schematic view of a coating process of an invar core wire in the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Example 1

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 1.35mm comprises an invar steel core wire 1 with the diameter of 1.25mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.10 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.30 wt% of nickel, 0.506 wt% of chromium, 0.53 wt% of cobalt, 1.19 wt% of molybdenum, 64.436 wt% of iron and 0.038 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 87.82 wt% of zinc, 11.03 wt% of aluminum and 1.15 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 1100-1250 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out, firstly, rough rolling is carried out, then, the hot steel ingot enters a finishing mill set to be continuously rolled into a round blank, the diameter of the blank is 5.0mm, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 5.0mm for 20-22 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.25mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.10-0.12 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 400-420 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is 10cm higher than the bottom port 713 of the protection tube to prevent the protective gas from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 480-500 ℃; the continuous routing and dipping time of the invar steel core wire 1 galvanized aluminum bath 8 is controlled to be 3-5 seconds.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 1.35mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 2

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 1.50mm comprises an invar steel core wire 1 with the diameter of 1.28mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.11 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.30 wt% of nickel, 0.506 wt% of chromium, 0.53 wt% of cobalt, 1.19 wt% of molybdenum, 64.436 wt% of iron and 0.038 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 87.82 wt% of zinc, 11.03 wt% of aluminum and 1.15 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 1100-1250 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out, firstly, rough rolling is carried out, then, the hot steel ingot enters a finishing mill set to be continuously rolled into a round blank, the diameter of the blank is 5.0mm, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 5.0mm by 19-21 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.28mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.10-0.12 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 400-420 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is 10cm higher than the bottom port 713 of the protection tube to prevent the protective gas from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 480-500 ℃; the continuous routing and dipping time of the invar steel core wire 1 galvanized aluminum bath 8 is controlled to be 3-5 seconds.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 1.5mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 3

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 1.85mm comprises an invar steel core wire 1 with the diameter of 1.59mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.13 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.31 wt% of nickel, 0.548 wt% of chromium, 0.615 wt% of cobalt, 1.02 wt% of molybdenum, 64.452 wt% of iron and 0.055 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 87.82 wt% of zinc, 11.03 wt% of aluminum and 1.15 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 1100-1250 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out, firstly, rough rolling is carried out, then, the hot steel ingot enters a finishing mill set to be continuously rolled into a round blank, the diameter of the blank is 5.0mm, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 5.0mm for 18-20 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.59mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.11-0.13 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 420-440 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is 12cm higher than the port 713 at the bottom of the protection tube, so that the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 490-510 ℃; the continuous routing and dipping time of the invar steel core wire 1 galvanized aluminum bath 8 is controlled to be 4-6 seconds.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 1.85mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 4

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.00mm comprises an invar steel core wire 1 with the diameter of 1.70mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.15 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.31 wt% of nickel, 0.548 wt% of chromium, 0.615 wt% of cobalt, 1.02 wt% of molybdenum, 64.452 wt% of iron and 0.055 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.83 wt% of zinc, 12.75 wt% of aluminum and 1.42 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 6.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 6.0mm for 18-20 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.70mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.18-0.20 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 430-450 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, the alloy liquid level 811 is 14cm higher than the bottom port 713 of the protection tube, and the protective gas is prevented from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 510-530 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 5-7 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the zinc-aluminum coating with the wire diameter of 2.00mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 5

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.25mm comprises an invar steel core wire 1 with the diameter of 1.89mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.18 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.786 wt% of nickel, 0.612 wt% of chromium, 0.684 wt% of cobalt, 1.108 wt% of molybdenum, 63.739 wt% of iron and 0.071 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.83 wt% of zinc, 12.75 wt% of aluminum and 1.42 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 6.5mm in a finishing mill group, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 6.5mm by 16-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.89mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.18-0.20 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 440-460 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by 16cm totally, so that the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 520-540 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 6-8 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the wire diameter of 2.25mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 6

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.50mm comprises an invar steel core wire 1 with the diameter of 2.10mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.20 mm; the invar core wire 1 comprises the following components in percentage by mass: 34.256 wt% of nickel, 0.623 wt% of chromium, 0.682 wt% of cobalt, 1.106 wt% of molybdenum, 63.268 wt% of iron and 0.065 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.83 wt% of zinc, 12.75 wt% of aluminum and 1.42 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 7.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 7.0mm for 15-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.10mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.21-0.23 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 460-480 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by 18cm totally, so that the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 530-550 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 7-9 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the wire diameter of 2.50mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

The zinc-aluminum plating layer invar single wire 3 obtained in the embodiments 1 to 6 is detected to have (1) tensile strength; (2) the length of the single wire with the diameter of 100 times bears 35 circles of continuous torsion; (3) testing the expansion coefficient of 100-300 ℃ by a differential method; (4) and (3) corrosion resistance, exposed in a 5% NaCl spray environment with the temperature of 35 +/-1 ℃ and maintained for 168h, and the corrosion grade of the single line surface. The test data are shown in table 1.

TABLE 1

Example 7

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.85mm comprises an invar steel core wire 1 with the diameter of 2.51mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.17 mm; the invar core wire 1 comprises the following components in percentage by mass: 34.731 wt% of nickel, 0.653 wt% of chromium, 0.511 wt% of cobalt, 1.012 wt% of molybdenum, 63.016 wt% of iron and 0.077 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.51 wt% of zinc, 13.25 wt% of aluminum and 1.24 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 7.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 7.0mm for 14-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.51mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.22-0.24 MPa. The preheating temperature is preferably 500-520 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 18cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 540-570 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 8-10 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 2.85mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 8

A3.00 mm diameter zinc-aluminum plating layer invar steel single wire 3 comprises an invar steel core wire 1 with the diameter of 2.64mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.18 mm; the invar core wire 1 comprises the following components in percentage by mass: 34.731 wt% of nickel, 0.653 wt% of chromium, 0.511 wt% of cobalt, 1.012 wt% of molybdenum, 63.016 wt% of iron and 0.077 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.51 wt% of zinc, 13.25 wt% of aluminum and 1.24 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 7.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 7.0mm for 14-17 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.64mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.24-0.26 MPa. The preferable range of the preheating temperature is 530-550 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 20cm, and the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 550-580 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 8-10 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the zinc-aluminum coating of 3.00mm in diameter is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 9

A3.25 mm diameter zinc-aluminum plating layer invar steel single wire 3 comprises an invar steel core wire 1 with a diameter of 2.85mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with a thickness of 0.20 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.071 wt% of nickel, 0.792 wt% of chromium, 0.947 wt% of cobalt, 1.181 wt% of molybdenum, 61.945 wt% of iron and 0.064 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 82.75 wt% of zinc, 16.09 wt% of aluminum and 1.16 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of a cast blank is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1000-1150 ℃.

S3, steel ingot rolling: and leading out the hot steel ingot, firstly, carrying out rough rolling, and then, continuously rolling the hot steel ingot into a round blank with the diameter of 8.0mm in a finishing mill group, wherein the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 8.0mm for 13-16 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.85mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.26-0.30 MPa. The preheating temperature is preferably 550-580 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 20cm, and the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 560-600 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 10-12 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the diameter of 3.25mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 10

A3.50 mm diameter zinc-aluminum plating layer invar steel single wire 3 comprises an invar steel core wire 1 with a diameter of 3.08mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with a thickness of 0.21 mm; the invar steel core wire 1 comprises the following components, by mass, 35.071 wt% of nickel, 0.792 wt% of chromium, 0.947 wt% of cobalt, 1.181 wt% of molybdenum, 61.945 wt% of iron and 0.064 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 82.75 wt% of zinc, 16.09 wt% of aluminum and 1.16 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of a cast blank is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1000-1150 ℃.

S3, steel ingot rolling: and leading out the hot steel ingot, firstly, carrying out rough rolling, and then, continuously rolling the hot steel ingot into a round blank with the diameter of 8.0mm in a finishing mill group, wherein the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 8.0mm for 13-16 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.08mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.28-0.32 MPa. The preheating temperature is preferably 560-590 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 20cm, and the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 580-600 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 10-13 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the diameter of 3.50mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 11

A3.85 mm diameter zinc-aluminum plating layer invar steel single wire 3 comprises an invar steel core wire 1 with a diameter of 3.39mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with a thickness of 0.23 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.470 wt% of nickel, 0.761 wt% of chromium, 0.911 wt% of cobalt, 1.090 wt% of molybdenum, 61.688 wt% of iron and 0.080 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 78.55 wt% of zinc, 20.44 wt% of aluminum and 1.01 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 950-1100 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank by a finishing mill group, the diameter of the blank is 9.0mm, and the blank is coiled and wound by adopting a winding mode.

S4, blank drawing: drawing a blank with the diameter of 9.0mm for 13-16 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.39mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.30-0.35 MPa. The preferable range of the preheating temperature is 600-640 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by over 22cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 600-650 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 10-13 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the diameter of 3.85mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 12

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 4.00mm comprises an invar steel core wire 1 with the diameter of 3.52mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.24 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.470 wt% of nickel, 0.761 wt% of chromium, 0.911 wt% of cobalt, 1.090 wt% of molybdenum, 61.688 wt% of iron and 0.080 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 78.55 wt% of zinc, 20.44 wt% of aluminum and 1.01 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 950-1100 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank by a finishing mill group, the diameter of the blank is 9.0mm, and the blank is coiled and wound by adopting a winding mode.

S4, blank drawing: drawing a blank with the diameter of 9.0mm for 12-15 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.52mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.35-0.40 MPa. The preferable range of the preheating temperature is 620-660 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by over 22cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 630-650 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 12-14 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the zinc-aluminum coating invar steel single wire 3 with the diameter of 4.00mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 13

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 4.50mm comprises an invar steel core wire 1 with the diameter of 3.94mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.28 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.82 wt% of nickel, 0.788 wt% of chromium, 0.927 wt% of cobalt, 1.04 wt% of molybdenum, 61.338 wt% of iron and 0.087 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 76.41 wt% of zinc, 22.46 wt% of aluminum and 1.13 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1100 ℃.

S3, steel ingot rolling: and leading out the hot steel ingot, firstly, carrying out rough rolling, and then, continuously rolling the hot steel ingot into a round blank with the diameter of 9.5mm in a finishing mill set, wherein the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 9.5mm for 14-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.94mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.40-0.45 MPa. The preheating temperature is preferably 650-680 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 25cm, and the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 640-670 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 8-10 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 2.85mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

Example 14

A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 5.50mm comprises an invar steel core wire 1 with the diameter of 4.82mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.34 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.82 wt% of nickel, 0.788 wt% of chromium, 0.927 wt% of cobalt, 1.04 wt% of molybdenum, 61.338 wt% of iron and 0.087 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 75.02 wt% of zinc, 24.03 wt% of aluminum and 0.95 wt% of other impurity elements.

The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:

s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.

S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1100 ℃.

S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 10.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.

S4, blank drawing: drawing a blank with the diameter of 10.0mm for 10-14 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 4.82mm, and coiling the invar core wire in a looping manner;

s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.

S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.

S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.46-0.50 MPa. The preferable range of the preheating temperature is 670-700 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.

S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 18cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 650-680 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 12-15 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.

S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 2.85mm is obtained.

S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;

s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.

The zinc-aluminum plating invar single line 3 obtained in examples 7 to 14 is tested by (1) tensile strength; (2) the length of the single wire with the diameter of 100 times bears 35 circles of continuous torsion; (3) testing the expansion coefficient of 100-300 ℃ by a differential method; (4) and (3) corrosion resistance, exposed in a 5% NaCl spray environment with the temperature of 35 +/-1 ℃ and maintained for 168h, and the corrosion grade of the single line surface. The test data are shown in table 2.

TABLE 2

Through the embodiments 1 to 14, the invention introduces 0.5 to 0.8wt% of chromium, 0.5 to 1.0wt% of cobalt and 1.0 to 1.2wt% of molybdenum alloy elements into the invar alloy steel. Improve the corrosion resistance of the invar core and improve the strength of the invar coreTemperature, hardness, toughness and temperature resistance. The linear expansion coefficient of the zinc-aluminum plating layer invar steel single line is less than 3.8 multiplied by 10^-61/DEG C, tensile strength higher than 1000MPa, 100 times diameter capable of bearing more than 35 circles of continuous torsion, and the use of the overhead conductor to reinforce the core can ensure that the conductor can continuously run at high temperature of 300 ℃ and below.

The zinc-aluminum plating invar steel single wire 3 obtained by the invention is applied to the production of the overhead power transmission line, not only improves the transmission capacity of the wire, controls the high-temperature sag of the power transmission line and ensures the safe operation of the line, but also has excellent corrosion resistance and can prolong the service life of the line, thereby bringing great economic and social benefits to the power transmission and transformation industry.

The foregoing is only a brief description and illustration of the invention. The invention is not limited thereto, and unless the appended claims define it, it is obvious to those skilled in the art in the light of this specification that the product formulation and process parameters can be adjusted to produce a single line product of invar steel with a zinc-aluminum coating suitable for other fields, which are within the protection of the present invention.