阅读说明：本技术 一种包覆铜包钢的生产方法 (Production method of clad copper-clad steel ) 是由 安绘竹 任玉辉 帅习元 尹一 车安 徐曦 王宏亮 张欢 于 2021-06-29 设计创作，主要内容包括：本发明涉及一种包覆铜包钢的生产方法,生产过程为：将盘条经清洗、干燥、包覆焊后制成包覆铜包钢盘条,再经拉拔、退火、表面钝化及收线工序制成包覆铜包钢成品；其中拉拔工序采用连续拉拔方式,将直径为的包覆铜包钢盘条直拉至直径为然后进行一次退火,再拉拔至成品直径。本发明采用导电钢盘条为原料直接包覆铜,然后拉拔为成品规格钢丝,通过控制盘条的组织性能均匀性、拉拔性及导电率,满足包覆铜包钢的各项指标要求,而且只需进行一次退火,省去了预拉拔工序,实现了工序减量化,节能降耗,降低了加工成本。(The invention relates to a production method of clad copper-clad steel, which comprises the following steps: cleaning, drying, coating and welding the wire rod to prepare a coated copper-clad steel wire rod, and then drawing, annealing, surface passivating and taking up the wire rod to prepare a coated copper-clad steel finished product; wherein the drawing process adopts a continuous drawing mode and has a diameter of The coated copper-clad steel wire rod is pulled to the diameter of)

1. The production method of the clad copper-clad steel is characterized by comprising the following production processes: cleaning, drying, coating and welding the wire rod to prepare a coated copper-clad steel wire rod, and then drawing, annealing, surface passivating and taking up the wire rod to prepare a coated copper-clad steel finished product; wherein the drawing process adopts a continuous drawing mode and has a diameter ofThe coated copper-clad steel wire rod is pulled to the diameter ofThen carrying out primary annealing and drawing to the diameter of a finished product; the drawing is carried out in the first pass by adopting a large compression ratio of more than 25 percent, and the single-pass compression ratio of the subsequent pass is 15 to 20 percent; the annealing process specifically comprises the following steps: heating at 840 +/-10 deg.C for more than 2 hr, holding for more than 4 hr, and cooling in furnace.

2. The production method of the clad copper-clad steel according to claim 1, wherein the wire rod comprises the following chemical components in percentage by mass: less than or equal to 0.010 percent of C, less than or equal to 0.010 percent of Si, less than or equal to 0.20 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.015 percent of Al, less than or equal to 0.0050 percent of N, and the balance of Fe and inevitable impurities.

3. The production method of the clad copper-clad steel according to claim 1, wherein the production process of the wire rod is as follows:

1) cutting the plate blank after smelting and continuous casting into square blanks;

2) heating to 1050-1150 ℃, and descaling the surface at a descaling pressure of more than 20 MPa;

3) rolling; the temperature in finish rolling is 840-940 ℃; controlling the spinning temperature at 860-930 ℃;

4) cooling the wire rod: cooling the wire rod after spinning on an air cooling roller way, closing a heat preservation cover, closing a fan, and enabling the speed of the roller way to be 0.2-0.4 m/s;

the dimensional accuracy of the wire rod is required to be more than grade C, the diameter deviation is within +/-0.25 mm, and the out-of-roundness is less than or equal to 0.24 mm; the tensile strength of the wire rod is less than or equal to 300MPa, and the grain size is more than 6 grade.

4. The method for producing the clad copper-clad steel according to claim 1, wherein the cleaning comprises 2 processes of pickling and water washing.

5. The production method of the clad copper-clad steel according to claim 1, wherein the cladding welding process specifically comprises the following steps: polishing the wire rod, and cleaning the copper strip; at room temperature, the copper strip is coiled by a covering machine and then is covered on the outer layer of the wire rod, and then the open end of the copper strip is welded to prepare a covered copper-clad steel wire rod; the thickness of the copper strip is 1-1.5 mm, and the purity is more than 99.99%.

6. The production method of the clad copper-clad steel as claimed in claim 1, wherein the finished clad copper-clad steel product has an electrical conductivity of 25-45%.

7. The method for producing clad copper-clad steel according to claim 1, wherein the diameter of the finished clad copper-clad steel product is

Technical Field

The invention relates to the technical field of production of coated copper clad steel wires, in particular to a copper clad steel wireA method for producing clad copper-clad steel by specification wire rods.

Background

The copper-clad steel is a copper-clad steel wire, namely a composite wire with a copper layer wrapped on the periphery of the steel wire. In the field of communication and telecommunication, the copper-clad steel wire integrates the tensile strength and toughness of steel (2 times of that of a pure copper wire), the conductivity and high-frequency characteristics of copper, has light weight (12 percent lighter than the pure copper wire), no creep, can withstand the attack of wind, snow and ice buds, can withstand large-span, salt mist and easily-corrosive environment, can reduce the distortion and distortion of transmitted information, improves the transmission quality, simultaneously has the advantages of saving copper materials, reducing cost and the like, and is an ideal substitute of a pure copper wire product. The copper clad steel wire is widely applied to core wires of parallel twin-core telephone user communication, connectors of various electronic components, core wires of military covered wires, overhead wires of power transmission and telephone lines, overhead wires of electrified railways and electrified light rail contact networks, braided shield wires of power cables, copper clad steel stranded wire carrier cables and suspension strings, grounding rods in the power industry and the like.

In recent years, with the continuous development of the communication industry and the electronic information industry, the application field of copper clad steel wire products is continuously expanded, and higher requirements on the performance of the products are provided. The coated copper-clad steel is mainly applied to the fields of high precision end and high conductivity such as coaxial cables, security wires and the like, and the production process of the conventional copper-clad steel wire comprises the following steps: wire rod-drawing-annealing-copper plating-finished copper-clad steel wire. The clad copper-clad steel is produced by adopting the process of conductive steel wire rod-clad copper-drawing, in order to ensure the drawing performance and the service performance of the wire rod, the extremely strict requirements on each index of the wire rod are provided, and the control difficulty of the production process is very large.

The Chinese patent with the publication number of CN102268595B discloses a steel for copper-clad steel and a production method thereof, which only relates to the production method of a copper-clad steel wire rod and does not relate to the production process of cladding copper-clad steel; the Chinese patent application with the publication number of CN109433835A discloses a production method of a large-size stranded wire electroplated copper-clad steel wire, which is completely different from the production process of the clad copper-clad steel wire and does not relate to the production process of a wire rod; the Chinese patent application with the publication number of CN109396200A discloses a production process for pre-treating large-size steel wires for cladding copper-clad steel, which only relates to a pre-treatment process for producing copper-clad steel wires by using conductive steel wire rods as raw materials, and does not relate to a production process for cladding copper and subsequent cladding copper-clad steel; the Chinese patent with the publication number of CN103531301B discloses a process for producing a soft copper-clad steel wire by adopting a welding cladding method, and the Chinese patent with the publication number of CN109290388A discloses a continuous cladding rolling production process for a copper-clad steel wire, wherein pre-drawing, cladding copper plus (rolling) and drawing processes are adopted to produce cladding copper-clad steel, and more than two times of annealing treatment are needed in the middle, the process is complex, and the production cost is increased.

Disclosure of Invention

The invention provides a production method of coated copper-clad steel, which adopts a conductive steel wire rod as a raw material to directly coat copper, then draws the steel wire rod to form a finished steel wire, meets various index requirements of the coated copper-clad steel by controlling the structural property uniformity, the drawability and the electric conductivity of the wire rod, only needs one-time annealing, saves the pre-drawing process, realizes the process reduction, saves energy, reduces consumption and reduces the processing cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a production method of clad copper-clad steel comprises the following production processes: cleaning, drying, coating and welding the wire rod to prepare a coated copper-clad steel wire rod, and then drawing, annealing, surface passivating and taking up the wire rod to prepare a coated copper-clad steel finished product; wherein the drawing process adopts a continuous drawing mode and has a diameter ofThe coated copper-clad steel wire rod is pulled to the diameter of Then carrying out primary annealing and drawing to the diameter of a finished product; the drawing is carried out in the first pass by adopting a large compression ratio of more than 25 percent, and the single-pass compression ratio of the subsequent pass is 15 to 20 percent; the annealing process specifically comprises the following steps: heating at 840 +/-10 deg.C for more than 2 hr, holding for more than 4 hr, and cooling in furnace.

The wire rod comprises the following chemical components in percentage by mass: less than or equal to 0.010 percent of C, less than or equal to 0.010 percent of Si, less than or equal to 0.20 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.015 percent of Al, less than or equal to 0.0050 percent of N, and the balance of Fe and inevitable impurities.

The production process of the wire rod comprises the following steps:

1) cutting the plate blank after smelting and continuous casting into square blanks;

2) heating to 1050-1150 ℃, and descaling the surface at a descaling pressure of more than 20 MPa;

3) rolling; the temperature in finish rolling is 840-940 ℃; controlling the spinning temperature at 860-930 ℃;

4) cooling the wire rod: cooling the wire rod after spinning on an air cooling roller way, closing a heat preservation cover, closing a fan, and enabling the speed of the roller way to be 0.2-0.4 m/s;

the dimensional accuracy of the wire rod is required to be more than grade C, the diameter deviation is within +/-0.25 mm, and the out-of-roundness is less than or equal to 0.24 mm; the tensile strength of the wire rod is less than or equal to 300MPa, and the grain size is more than 6 grade.

The production method of the clad copper-clad steel comprises 2 procedures of acid washing and water washing.

The cladding welding process specifically comprises the following steps: polishing the wire rod, and cleaning the copper strip; at room temperature, the copper strip is coiled by a covering machine and then is covered on the outer layer of the wire rod, and then the open end of the copper strip is welded to prepare a covered copper-clad steel wire rod; the thickness of the copper strip is 1-1.5 mm, and the purity is more than 99.99%.

The conductivity of the clad copper-clad steel finished product is 25-45%.

The diameter of the clad copper clad steel finished product is

Compared with the prior art, the invention has the beneficial effects that:

1) when the conventional coated copper clad steel is produced at present, the following methods are generally adopted: the production process of pre-drawing raw materials, coating copper and drawing needs more than two times of annealing in the middle; according to the invention, the conductive steel wire rod is used as a raw material, and the pre-drawing process before copper cladding is omitted by strictly controlling the dimensional precision of the wire rod, so that the wire rod can be directly clad with copper;

2) the intermediate annealing is only carried out once, so that the process reduction is realized, and the production and processing cost is reduced;

3) the cold process is adopted for cladding, so that annealing passes are reduced, a pre-drawing process is omitted, the process is simpler, the operating efficiency is higher, and the aims of improving the productivity, saving energy and reducing consumption are fulfilled;

4) compared with a copper plating production process, the copper coating process is more environment-friendly, the copper strip is uniform in thickness, so that the product quality and the electric conductivity are more stable, and the problem of non-uniform copper plating layer of the steel wire in the copper plating process is solved;

5) the coated copper-clad steel produced by the method has good uniformity of structure performance, good steel wire drawing performance and excellent conductivity, and meets the requirements of various indexes of the coated copper-clad steel.

Detailed Description

The invention relates to a production method of clad copper-clad steel, which comprises the following production processes: cleaning, drying, coating and welding the wire rod to prepare a coated copper-clad steel wire rod, and then drawing, annealing, surface passivating and taking up the wire rod to prepare a coated copper-clad steel finished product; wherein the drawing process adopts a continuous drawing mode and has a diameter ofThe coated copper-clad steel wire rod is pulled to the diameter ofThen carrying out primary annealing and drawing to the diameter of a finished product; the drawing is carried out in the first pass by adopting a large compression ratio of more than 25 percent, and the single-pass compression ratio of the subsequent pass is 15 to 20 percent; the annealing process specifically comprises the following steps: heating at 840 +/-10 deg.C for more than 2 hr, holding for more than 4 hr, and cooling in furnace.

The wire rod comprises the following chemical components in percentage by mass: less than or equal to 0.010 percent of C, less than or equal to 0.010 percent of Si, less than or equal to 0.20 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.015 percent of Al, less than or equal to 0.0050 percent of N, and the balance of Fe and inevitable impurities.

The production process of the wire rod comprises the following steps:

1) cutting the plate blank after smelting and continuous casting into square blanks;

2) heating to 1050-1150 ℃, and descaling the surface at a descaling pressure of more than 20 MPa;

3) rolling; the temperature in finish rolling is 840-940 ℃; controlling the spinning temperature at 860-930 ℃;

4) cooling the wire rod: cooling the wire rod after spinning on an air cooling roller way, closing a heat preservation cover, closing a fan, and enabling the speed of the roller way to be 0.2-0.4 m/s;

the dimensional accuracy of the wire rod is required to be more than grade C, the diameter deviation is within +/-0.25 mm, and the out-of-roundness is less than or equal to 0.24 mm; the tensile strength of the wire rod is less than or equal to 300MPa, and the grain size is more than 6 grade.

The production method of the clad copper-clad steel comprises 2 procedures of acid washing and water washing.

The cladding welding process specifically comprises the following steps: polishing the wire rod, and cleaning the copper strip; at room temperature, the copper strip is coiled by a covering machine and then is covered on the outer layer of the wire rod, and then the open end of the copper strip is welded to prepare a covered copper-clad steel wire rod; the thickness of the copper strip is 1-1.5 mm, and the purity is more than 99.99%.

The conductivity of the clad copper-clad steel finished product is 25-45%.

The diameter of the clad copper clad steel finished product is

Compared with the production method of copper-clad steel wires by adopting an electroplating process, the production method of the copper-clad steel wires has the advantages that the copper-clad process is more environment-friendly, high-conductivity products can be produced, the thickness of copper strips is more uniform, the product quality and the conductivity are more stable, and the problem of non-uniform thickness of copper-clad layers of the copper-clad steel wires produced by the copper-clad process is solved. Compared with the traditional coating process, the coating process disclosed by the invention adopts a cold process for coating, so that the energy is saved and the consumption is reduced. In addition, the invention adopts the copper-clad and drawing process for production, saves the pre-drawing process before cladding the copper by controlling the dimensional precision of the wire rod, has fewer drawing passes and simpler operation, improves the operation efficiency, improves the productivity, and saves energy and reduces consumption at the same time.

The invention realizes the process reduction, and compared with other conventional copper coating processes, the intermediate annealing is only carried out once, so that 1 annealing procedure is saved, and the processing cost is reduced.

The electric conductivity of the clad copper-clad steel produced by the method is 25-45%, and the use requirement of the product can be well met.

The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples.

[ example 1 ]

In this example, the diameter of the wire rod used for producing the clad copper clad steel is specified as

The production process of the wire rod comprises the following steps: cutting the continuous casting plate blank into square blanks, wherein the heating temperature of a wire rod is 1100 ℃, the descaling pressure is 20MPa, the finish rolling temperature is 850 ℃, the spinning temperature is 890 ℃, the wire rods are cooled on an air-cooled roller way after spinning, a heat-preserving cover and a fan are all closed, and the speed of the roller way is 0.2 m/s.

The production process of the clad copper-clad steel comprises the following steps:

1) pickling to remove the iron scale on the surface of the wire rod;

2) washing with water to remove acid liquor on the surface of the wire rod in the previous working procedure;

3) drying to remove residual water on the surface of the wire rod, and preparing for the next copper coating process;

4) a cladding welding process; polishing the wire rod, cleaning the copper strip, removing oil stains and dust on the surfaces of the wire rod and the copper strip, and increasing the binding force between the wire rod and the copper strip; at room temperature, winding and cladding the copper strip on the outer layer of the wire rod by using a cladding machine, and then welding the open end of the copper strip to prepare a copper-clad steel wire rod, wherein the thickness of the copper strip is 1mm, and the purity of the copper strip is 99.99%;

5) adopting a continuous drawing mode to make the diameter of the steel wire beThe coated copper clad steel wire rod is pulled toAccording to the specification, primary annealing treatment is carried out in the middle, the heating temperature is 830 ℃, the heating time is 2 hours, the heat preservation time is 4 hours, and then the annealing furnace is cooled.

The drawing is carried out by adopting a large compression ratio of 25% in the first drawing pass so as to achieve a good coating effect, and the drawing is carried out by adopting a medium compression ratio of 15% -20% in each subsequent drawing pass;

6) surface passivation treatment; carrying out surface passivation treatment on the drawn steel wire to prevent the surface of the steel wire from being oxidized;

7) taking up; and (5) taking up the steel wire and packaging.

The tensile strength of the wire rod produced by the embodiment is 280MPa, the reduction of area is 90%, the conductivity of the wire rod is 16.6%, and the grain size of the wire rod is 6.5 grade. The electric conductivity of the produced coated copper-clad steel is 35%, and the technical requirements of users on the coated copper-clad steel are well met.

[ example 2 ]

In this example, the diameter of the wire rod used for producing the clad copper clad steel is specified as

The production process of the wire rod comprises the following steps: cutting the continuous casting plate blank into square blanks, wherein the heating temperature of a wire rod is 1080 ℃, the descaling pressure is 21MPa, the finish rolling temperature is 900 ℃, the spinning temperature is 900 ℃, the wire rod is cooled on an air-cooled roller way after spinning, a heat-preserving cover and a fan are all closed, and the speed of the roller way is 0.3 m/s.

The production process of the clad copper-clad steel comprises the following steps:

1) pickling to remove the iron scale on the surface of the wire rod;

2) washing with water to remove acid liquor on the surface of the wire rod in the previous working procedure;

3) drying to remove residual water on the surface of the wire rod, and preparing for the next copper coating process;

4) a cladding welding process; polishing the wire rod, cleaning the copper strip, removing oil stains and dust on the surfaces of the wire rod and the copper strip, and increasing the binding force between the wire rod and the copper strip; at room temperature, winding and cladding the copper strip on the outer layer of the wire rod by using a cladding machine, and then welding the open end of the copper strip to prepare a copper-clad steel wire rod, wherein the thickness of the copper strip is 1.5mm, and the purity of the copper strip is 99.99%;

5) adopting a continuous drawing mode to make the diameter of the steel wire beThe coated copper clad steel wire rod is pulled toAccording to the specification, primary annealing treatment is carried out in the middle, the heating temperature during annealing is 850 ℃, the heating time is 2 hours, the heat preservation time is 4 hours, and then furnace cooling is carried out.

The drawing is carried out by adopting a large compression ratio of 25% in the first drawing pass so as to achieve a good coating effect, and the drawing is carried out by adopting a medium compression ratio of 15% -20% in each subsequent drawing pass;

6) surface passivation treatment; carrying out surface passivation treatment on the drawn steel wire to prevent the surface of the steel wire from being oxidized;

7) taking up; and (5) taking up the steel wire and packaging.

The tensile strength of the wire rod produced in the embodiment is 285MPa, the reduction of area is 92%, the conductivity of the wire rod is 16.8%, and the grain size of the wire rod is 6 grades. The electric conductivity of the produced coated copper-clad steel is 38%, and the technical requirements of users on the coated copper-clad steel are well met.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.