阅读说明：本技术 一种表面耐蚀镍基复合钢板的生产工艺 (Production process of surface corrosion-resistant nickel-based composite steel plate ) 是由 张华伟 杨宴宾 刘生 于 2020-04-21 设计创作，主要内容包括：本发明公开了一种表面耐蚀镍基复合钢板的生产工艺,包括如下步骤：S1,复合,选择镍基合金敷层与基层采用复合工艺制得板坯；其中,所述镍基合金敷层成分至少包括Ni含量为≥20％,以重量百分比计；所述基层成分至少包括C含量为0～1.2％,以重量百分比计；S2,热轧,将步骤S1制备的板坯进行热轧轧制。本发明的表面耐蚀镍基复合钢板的生产工艺,通过控制敷层与基层的化学成分以及轧制工艺,使制备的镍基复合钢板既具有镍基合金的耐蚀性又具有碳钢的强度及拉伸性能等；进而具有较好的综合使用性能和较广的适用范围,便于节约资源,延长钢材使用寿命,减少有害物质排放,实现可持续发展。(The invention discloses a production process of a surface corrosion-resistant nickel-based composite steel plate, which comprises the following steps: s1, compounding, namely selecting a nickel-based alloy coating and a base layer to prepare a plate blank by adopting a compounding process; wherein, the nickel-based alloy coating at least comprises more than or equal to 20 percent of Ni content by weight percentage; the base layer at least comprises 0-1.2% of C by weight percentage; and S2, hot rolling, namely, hot rolling the slab prepared in the step S1. According to the production process of the surface corrosion-resistant nickel-based composite steel plate, the chemical components of the coating layer and the base layer are controlled, and the rolling process is controlled, so that the prepared nickel-based composite steel plate has the corrosion resistance of nickel-based alloy, the strength, the tensile property and the like of carbon steel; and then has better comprehensive performance and wider application range, is convenient for saving resources, prolongs the service life of steel, reduces the emission of harmful substances and realizes sustainable development.)

1. The production process of the surface corrosion-resistant nickel-based composite steel plate is characterized by comprising the following steps of:

s1, compounding, namely selecting a nickel-based alloy coating and a base layer, and preparing a plate blank by adopting a compounding process; wherein, the nickel-based alloy coating at least comprises more than or equal to 20 percent of Ni content by weight percentage; the base layer at least comprises 0-1.2% of C by weight percentage;

and S2, hot rolling, and hot rolling the plate blank prepared in the step S1.

2. The process of claim 1, wherein the ni-based alloy clad layer composition further includes Cr content of 15 wt% or more in step S1.

3. The process for producing the surface-corrosion-resistant nickel-based clad steel sheet according to claim 1 or 2, wherein the cladding process is overlay welding or thermal cladding or spray coating in step S1.

4. The production process of the surface corrosion-resistant nickel-based clad steel plate according to claim 3, wherein before surfacing, a sanding belt or a milling machine is used for removing impurities from the surface of the base layer;

during surfacing, the welding speed is 0.1-0.7 m/min, and the welding current is 500-1200A.

5. The production process of the surface corrosion-resistant nickel-based clad steel plate according to claim 3, wherein the thermal deposition adopts multilayer laser cladding, the output power is 0.75-25 kw, the spot diameter is 2.5-3.2 mm, and the scanning speed is 0.2-1.2 m/min.

6. The process for producing the surface-corrosion-resistant nickel-based clad steel plate according to claim 3, wherein the plate blank is a single-sided nickel-based alloy plate blank or a double-sided nickel-based alloy plate blank in the step S1.

7. The process for producing the surface-corrosion-resistant nickel-base clad steel sheet according to claim 4, wherein the hot rolling is hot continuous rolling or medium plate rolling in step S2.

8. The process for producing the surface corrosion-resistant nickel-based clad steel plate according to claim 7, wherein in the hot continuous rolling process, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 900-1280 ℃;

carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa;

and (3) rough rolling of the plate blank in multiple passes after descaling, wherein the number of the rough rolling passes is 3-8, and the descaling is performed for 1-16 times during rough rolling.

9. The production process of the surface corrosion-resistant nickel-based clad steel plate according to claim 7, wherein in the rolling process of the steckel mill, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 800-1280 ℃;

carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa;

and (3) rolling the plate blank in multiple passes after descaling, wherein the total pass of rolling is 3-20.

10. The process for producing the surface-corrosion-resistant nickel-base clad steel sheet according to claim 4, wherein the hot rolling is heavy and medium plate rolling;

in the rolling process of the medium plate, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 900-1280 ℃;

carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa;

and (3) rolling the plate blank in multiple passes after descaling, wherein the total pass of rolling is 3-20.

11. The production process of the surface corrosion-resistant nickel-based clad steel plate as claimed in any one of claims 4 to 10, further comprising a surface oxide removal process.

12. The production process of the surface corrosion-resistant nickel-based clad steel plate as claimed in any one of claims 4 to 9, wherein the production process of the surface corrosion-resistant nickel-based clad steel plate further comprises cold rolling and annealing.

Technical Field

The invention relates to the field of steel manufacturing, in particular to a production process of a surface corrosion-resistant nickel-based composite steel plate.

Background

The metal composite plate is formed by coating another metal composite material on a metal base material, so that the obtained composite plate has the properties of both the coating metal and the base metal. The nickel-based composite steel plate can replace nickel-based alloy to fully exert the performances of corrosion resistance, hydrogen resistance, brightness and the like, simultaneously has the special performances of strength, tensile property, processability, weldability and the like of carbon steel, greatly saves the use of the nickel-based corrosion-resistant alloy, reduces the cost and the resource waste, and becomes an irreplaceable material in some fields along with the gradual embodiment of economy and other use advantages.

In view of the above, it is necessary to develop a novel process for producing a surface corrosion-resistant nickel-based clad steel sheet having both corrosion resistance of a nickel-based alloy and strength, tensile properties, etc. of carbon steel, which is convenient for saving resources, extending the life of steel, and realizing sustainable development.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a production process of a nickel-based composite steel plate with a corrosion-resistant surface, wherein the nickel-based composite steel plate has the corrosion resistance of nickel-based alloy, the strength, the tensile property and the like of carbon steel, is convenient to save resources, prolongs the service life of steel and realizes sustainable development.

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

a production process of a surface corrosion-resistant nickel-based composite steel plate comprises the following steps:

s1, compounding, namely selecting a nickel-based alloy coating and a base layer, and preparing a plate blank by adopting a compounding process; wherein, the nickel-based alloy coating at least comprises more than or equal to 20 percent of Ni content by weight percentage; the base layer at least comprises 0-1.2% of C by weight percentage;

and S2, hot rolling, and hot rolling the plate blank prepared in the step S1.

Preferably, in step S1, the ni-based alloy cladding composition further includes Cr content of 15 wt% or more.

Preferably, in the step S1, the composite process is bead welding or thermal welding or spraying.

Preferably, before surfacing, removing impurities on the surface of the base layer by using a sanding belt or a milling machine;

during surfacing, the welding speed is 0.1-0.7 m/min, and the welding current is 500-1200A.

Preferably, the thermal deposition adopts multilayer laser deposition, the output power is 0.75-25 kw, the diameter of a light spot is 2.5-3.2 mm, and the scanning speed is 0.2-1.2 m/min.

Preferably, in the step S1, the slab is a single-sided nickel-based alloy slab or a double-sided nickel-based alloy slab.

Preferably, in the step S2, the hot rolling is hot continuous rolling or medium plate rolling.

Preferably, in the hot continuous rolling process, the plate blank is sent into a heating furnace for heating, and the tapping temperature is 900-1280 ℃;

carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa;

and (3) rough rolling of the plate blank in multiple passes after descaling, wherein the number of the rough rolling passes is 3-8, and the descaling is performed for 1-16 times during rough rolling.

Preferably, in the rolling process of the steckel mill, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 800-1280 ℃;

carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa;

and (3) rolling the plate blank in multiple passes after descaling, wherein the total pass of rolling is 3-20.

Preferably, the hot rolling is medium plate rolling;

in the rolling process of the medium plate, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 900-1280 ℃;

carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa;

and (3) rolling the plate blank in multiple passes after descaling, wherein the total pass of rolling is 3-20.

Preferably, the production process of the surface corrosion-resistant nickel-based clad steel plate further comprises a surface oxide removal process.

Preferably, the production process of the surface corrosion-resistant nickel-based clad steel plate further comprises cold rolling and annealing.

The invention has the beneficial effects that:

the production process of the surface corrosion-resistant nickel-based composite steel plate controls the chemical components of the coating and the base layer and the rolling process, so that the prepared nickel-based composite steel plate has the corrosion resistance of nickel-based alloy, the strength, the tensile property and the like of carbon steel; and then has better comprehensive performance and wider application range, is convenient for saving resources, prolongs the service life of steel, reduces the emission of harmful substances and realizes sustainable development.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way.

The invention provides a production process of a surface corrosion-resistant nickel-based composite steel plate, which comprises the following steps:

s1, compounding, namely selecting a nickel-based alloy coating and a base layer, and preparing a plate blank by adopting a compounding process; the plate blank is a single-sided nickel-based alloy plate blank or a double-sided nickel-based alloy plate blank;

wherein, the nickel-based alloy coating at least comprises more than or equal to 20 percent of Ni content by weight percentage; or the nickel base alloy coating comprises more than or equal to 20 percent of Ni and more than or equal to 15 percent of Cr in percentage by weight; the base layer at least comprises 0-1.2% of C by weight percentage; selecting a proper nickel-based alloy coating and a carbon steel base layer, wherein the base layer is carbon steel or stainless steel, can be a cast steel billet directly or a thick steel plate rolled by a casting blank, and is polished to remove surface impurities and has the thickness of 20-600 mm; the nickel-based alloy coating can be nickel-based alloy welding strip, welding rod, welding wire, powder material and the like obtained by the prior art, and comprises the following components in percentage by weight: 940L, 825 alloy, 6Mo super austenitic nickel-based alloy, 625 alloy, C-276 alloy, C-22 alloy and the like, wherein the single-layer thickness of the nickel-based alloy coating is 1-30 mm;

the composite process is surfacing welding or thermal deposition or spraying;

wherein, the surfacing adopts band electrode submerged arc surfacing, an abrasive belt or a milling machine is adopted to carry out surface impurity removal on the carbon steel base layer, and the surfacing is carried out after impurity removal, wherein the welding speed is 0.1-0.7 m/min, and the current is 500-1200A. Or adopting a surfacing process with the same function, such as strip electrode electroslag surfacing, submerged arc welding, carbon dioxide gas shielded welding or argon arc welding;

the thermal deposition adopts multilayer laser cladding, the output power is 0.75-25 kW, the output power is preferably 1.5kW, the diameter of a light spot is 2.5-3.2 mm, the diameter of the light spot is preferably 3mm, the scanning speed is 0.2-1.2 m/min, and the scanning speed is preferably 0.35 m/min. The hot melting process with the same function such as electromagnetic induction hot melting coating, laser melting coating, plasma melting coating or flame melting coating can also be adopted.

The spraying may be cold spraying or thermal spraying, etc.

S2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; hot rolling is hot continuous rolling;

in the hot continuous rolling process, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 900-1280 ℃; carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa; rough rolling is carried out after the scale of the plate blank is removed, the pass of the rough rolling is 3-8, and the scale is removed for 1-16 times during the rough rolling;

in the process of rolling the medium plate, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 900-1280 ℃; carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa; carrying out rough rolling after descaling of the plate blank, wherein the rough rolling pass is 3-20;

in the rolling process of a steckel mill, a plate blank is sent into a heating furnace to be heated, and the tapping temperature is 800-1280 ℃; carrying out high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is more than or equal to 10 MPa; carrying out rough rolling after descaling of the plate blank, wherein the rough rolling pass is 3-20;

the surface corrosion-resistant nickel-based clad steel sheet obtained by subjecting the slab to the above steps S1 and S2 may be used as it is, or may be used after removing the surface oxide by a surface oxide removal step, for example, removing the oxide by pickling;

the surface corrosion-resistant nickel-based clad steel plate of the plate blank after the steps S1 and S2 can be continuously cold-rolled and annealed into a cold-rolled product for use.

The production process of the surface corrosion-resistant nickel-based composite steel plate can be used for producing the surface corrosion-resistant nickel-based composite steel plate and also can be used for rolling square or round billets to obtain products such as rod and wire rods with surface corrosion-resistant nickel-based composite and the like.

The production process of the surface-corrosion-resistant nickel-base clad steel sheet according to the present invention will be described in more detail below (taking a single-sided nickel-base alloy slab as an example) by selecting a nickel-base alloy clad layer and a base layer having chemical compositions shown in table 1; A. b, C is a nickel-base alloy clad and base layer for use in the present invention; wherein the alloy content in the base layer of C is higher.

TABLE 1

Example 1

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in A in the table 1, and surfacing to obtain a plate blank; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel blank, and surface impurities are removed through grinding, wherein the thickness is 226 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 15 mm;

the surfacing adopts strip submerged arc surfacing, the thickness of a welding strip is 0.5mm, the width of the welding strip is 60mm, the welding current is 790A, the welding speed is 0.4m/min, and the thickness of single-layer surfacing is 2.7 mm;

s2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; hot rolling is hot continuous rolling;

wherein, in the hot continuous rolling process, the plate blank is sent into a heating furnace for heating, and the tapping temperature is 1200 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rough rolling is carried out after the scale removal of the plate blank, the rough rolling pass is 5 passes, and the scale removal is 1 pass during the rough rolling;

the hot continuous rolling is carried out to obtain the surface corrosion-resistant nickel-based composite steel plate with the thickness of 12mm and the thickness of a coating layer of 0.73mm, and the yield strength, the tensile strength and the elongation percentage A of the surface corrosion-resistant nickel-based composite steel plate are measured to be 342MPa, 397MPa and A respectively₅₀29.1 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no rust after a hydrochloric acid test for 700 hours.

Example 2

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in A in the table 1, and preparing a plate blank by adopting hot-melt coating; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel blank, and surface impurities are removed through grinding, wherein the thickness is 226 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 9 mm;

the thermal deposition adopts multilayer laser deposition, the output power is 1.5kW, the spot diameter is 3mm, and the scanning speed is 0.35 m/min.

S2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; hot rolling is hot continuous rolling;

wherein, in the hot continuous rolling process, the plate blank is sent into a heating furnace for heating, and the tapping temperature is 1200 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rough rolling is carried out after the scale removal of the plate blank, the rough rolling pass is 5 passes, and the scale removal is 1 pass during the rough rolling;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained after hot continuous rolling is 12mm, the thickness of the coating is 0.46mm, and the surface corrosion-resistant nickel-based composite steel plate is measuredThe yield strength of the composite steel plate is 312MPa, the tensile strength is 391MPa, and the elongation percentage A is₅₀29.1 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no rust after a hydrochloric acid test for 700 hours.

Example 3

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in A in the table 1, and surfacing to obtain a plate blank; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel blank, and surface impurities are removed through grinding, wherein the thickness is 226 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 9 mm;

the surfacing adopts submerged arc surfacing, the diameter of a welding rod is 4mm, the welding current is 580A, the welding speed is 0.32m/min, and the thickness of single-layer surfacing is 4.5 mm;

s2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; the hot rolling is medium plate rolling;

wherein, in the process of rolling the medium plate, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 1230 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rolling the plate blank after descaling, wherein the total rolling pass is 12;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained by rolling the medium plate is 24mm, the thickness of the coating is 0.88mm, and the yield strength, the tensile strength and the elongation A of the surface corrosion-resistant nickel-based composite steel plate are measured to be 372MPa, 475MPa and A₅₀24.1 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no rust after a hydrochloric acid test for 700 hours.

Example 4

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in A in the table 1, and surfacing to obtain a plate blank; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel blank, and surface impurities are removed through grinding, wherein the thickness is 226 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 9 mm;

the surfacing adopts submerged arc surfacing, the diameter of a welding rod is 4mm, the welding current is 580A, the welding speed is 0.32m/min, and the thickness of single-layer surfacing is 4.5 mm;

s2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; the hot rolling is rolling by a coil rolling mill;

wherein, in the rolling process of the rolling mill, the plate blank is sent into a heating furnace for heating, and the tapping temperature is 1200 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rough rolling is carried out after the scale removal of the plate blank, and the rough rolling pass is 5;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained by hot continuous rolling is 12mm, the thickness of a coating layer is 0.44mm, the yield strength of the surface corrosion-resistant nickel-based composite steel plate is 357MPa, the tensile strength is 413MPa, and the elongation A is measured₅₀28.2 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no rust after a hydrochloric acid test for 700 hours.

Example 5

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in A in the table 1, and surfacing to obtain a plate blank; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel billet, and surface impurities are removed through polishing, wherein the thickness is 150 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 9 mm;

the surfacing adopts submerged arc surfacing, the diameter of a welding rod is 4mm, the welding current is 580A, the welding speed is 0.32m/min, and the thickness of single-layer surfacing is 4.5 mm;

s2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; hot rolling is hot continuous rolling;

wherein, in the hot continuous rolling process, the plate blank is sent into a heating furnace for heating, and the tapping temperature is 1160 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rough rolling is carried out after the scale removal of the plate blank, the rough rolling pass is 6, and the scale removal is 1 during the rough rolling;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained by hot continuous rolling is 24mm, the thickness of the coating is 1.30mm, the yield strength of the surface corrosion-resistant nickel-based composite steel plate is 264MPa, the tensile strength is 410MPa, and the elongation A is measured₅₀27.1 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no rust after being tested for 700 hours by hydrochloric acid.

Example 6

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in A in the table 1, and surfacing to obtain a plate blank; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel blank, and surface impurities are removed through grinding, wherein the thickness is 226 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 9 mm;

the surfacing adopts strip submerged arc surfacing, the thickness of a welding strip is 0.5mm, the width of the welding strip is 60mm, the welding current is 790A, the welding speed is 0.4m/min, and the thickness of single-layer surfacing is 2.7 mm;

s2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; hot rolling is hot continuous rolling;

wherein, in the hot continuous rolling process, the plate blank is sent into a heating furnace for heating, and the tapping temperature is 1160 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rough rolling is carried out after the scale removal of the plate blank, the rough rolling pass is 6, and the scale removal is 1 during the rough rolling;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained by hot continuous rolling is 24mm, the thickness of the coating is 0.88mm, the yield strength of the surface corrosion-resistant nickel-based composite steel plate is 364MPa, the tensile strength is 410MPa,elongation A₅₀27.1 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no rust after being tested for 700 hours by hydrochloric acid.

Example 7

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in B in the table 1, and surfacing to obtain a plate blank; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel blank, and surface impurities are removed through grinding, wherein the thickness is 226 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 9 mm;

the surfacing adopts strip submerged arc surfacing, the thickness of a welding strip is 0.5mm, the width of the welding strip is 60mm, the welding current is 790A, the welding speed is 0.38m/min, and the thickness of single-layer surfacing is 2.8 mm;

s2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; hot rolling is hot continuous rolling;

wherein, in the hot continuous rolling process, the plate blank is sent into a heating furnace to be heated, and the tapping temperature is 1170 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rough rolling is carried out after the scale removal of the plate blank, the rough rolling pass is 5 passes, and the scale removal is 5 times during the rough rolling;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained by hot continuous rolling is 12mm, the thickness of the coating is 0.44mm, the yield strength of the surface corrosion-resistant nickel-based composite steel plate is 331MPa, the tensile strength is 376MPa, and the elongation A is measured₅₀26.0 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no corrosion after a hydrochloric acid test for 700 hours.

Example 8

The production process of the surface corrosion-resistant nickel-based composite steel plate provided by the embodiment comprises the following steps of:

s1, compounding, namely selecting the corresponding nickel-based alloy coating and base layer in B in the table 1, and surfacing to obtain a plate blank; the plate blank is a single-sided nickel-based alloy plate blank;

the base layer is a carbon steel casting blank, namely a poured steel billet, and surface impurities are removed through grinding, wherein the thickness is 246 mm; the nickel-based alloy coating adopts low-carbon welding strips, welding rods, welding wires, powder materials and the like obtained by the prior art, and the thickness of a single layer is 10 mm;

the surfacing adopts strip submerged arc surfacing, the thickness of a welding strip is 0.5mm, the width of the welding strip is 60mm, the welding current is 790A, the welding speed is 0.4m/min, and the thickness of single-layer surfacing is 2.7 mm; s2, hot rolling, namely, hot rolling the plate blank prepared in the step S1 to obtain a surface corrosion-resistant nickel-based composite steel plate; hot rolling is hot continuous rolling;

wherein, in the hot continuous rolling process, the plate blank is sent into a heating furnace for heating, and the tapping temperature is 1200 ℃; performing high-pressure water descaling after the plate blank is taken out of the furnace, wherein the descaling pressure is 17 MPa; rough rolling is carried out after the scale removal of the plate blank, the rough rolling pass is 5 passes, and the scale removal is 2 times during the rough rolling;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained by hot continuous rolling is 24mm, the thickness of the coating is 0.90mm, the yield strength of the surface corrosion-resistant nickel-based composite steel plate is 349MPa, the tensile strength is 384MPa, and the elongation A is measured₅₀20.7 percent, and the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no corrosion after being tested for 700 hours by hydrochloric acid.

Comparative example 1

The other steps are the same as the example 1, and only the nickel-based alloy coating layer and the base layer corresponding to C in the table 1 are selected in the step S1;

the thickness of the surface corrosion-resistant nickel-based composite steel plate obtained by hot continuous rolling is 12mm, the thickness of the coating is 0.73mm, the yield strength of the surface corrosion-resistant nickel-based composite steel plate is 416MPa, the tensile strength is 563MPa, and the elongation A is measured₅₀And the content is 46 percent, and the hydrochloric acid test is carried out for 700 hours, so that the surface of the nickel-based composite steel plate with the corrosion-resistant surface is smooth and has no corrosion.

The base layer of the alloy has high alloy content, although the alloy is a corrosion-resistant variety, the alloy is hidden in the coating layer, so that the advantages of corrosion resistance and tensile property are not exerted, the cost is relatively high, and the economy is poor.

Comparative example 2

Only the base layer composition corresponding to a in table 1 was selected, and hot rolling was performed without the step S1, and the other processes were the same as in example 1.

The hot continuous rolling rolled surface corrosion-resistant nickel-based composite steel plate has the thickness of 12mm and no coating, and the yield strength of the steel plate is 311MPa, the tensile strength is 351MPa, and the elongation A is measured₅₀32 percent, the corrosion on the surface of the steel plate is serious when the hydrochloric acid test is carried out for 500 hours.

In the surface corrosion-resistant nickel-based clad steel sheets prepared in the above examples 1 to 8, at the composite interface between the base layer and the nickel-based alloy clad layer, the element content of the base layer is different from that of the nickel-based alloy clad steel sheet in the thickness direction, so that the element with a higher content diffuses and moves to the side with a lower content. Therefore, transition layers which are deep into the range of about 0-2000 mu m on both sides are formed on the interface of the base layer of the surface corrosion-resistant nickel-based clad steel plate and the nickel-based alloy clad steel plate, and the average component of each element of the transition layers is between the corresponding base layer component and clad steel plate component, so that gradient transition is formed. For example: the high-mass-percentage alloy element such as Cr on the side of the Ni-based alloy clad steel sheet diffuses toward the base layer, the high-mass-percentage carbon element in the base layer diffuses toward the side of the clad steel sheet, and the average composition of the elements such as Ni, C, Cr, Mn, Mo and the like in the transition layer is between the Ni-based alloy clad steel sheet and the base layer.

By combining the above examples 1 to 8 and comparative examples 1 to 2, it can be seen that the surface corrosion-resistant nickel-based clad steel plate of the present invention has the corrosion resistance of the nickel-based alloy, the strength and tensile properties of the carbon steel, and the like by controlling the chemical compositions of the coating and the base layer and combining the surfacing welding, hot-melt coating, or spraying with the hot rolling process; and then has better comprehensive performance and wider application range, is convenient for saving resources, prolongs the service life of steel, reduces the emission of harmful substances and realizes sustainable development.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.