CN114107622A - Production method of cold-rolled nickel-saving austenitic stainless steel 8K mirror surface - Google Patents

Production method of cold-rolled nickel-saving austenitic stainless steel 8K mirror surface Download PDF

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CN114107622A
CN114107622A CN202111390803.9A CN202111390803A CN114107622A CN 114107622 A CN114107622 A CN 114107622A CN 202111390803 A CN202111390803 A CN 202111390803A CN 114107622 A CN114107622 A CN 114107622A
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cold
rolling
rolled
austenitic stainless
stainless steel
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CN114107622B (en
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梁健浑
徐向东
方健
方剑锋
黄卫文
谢水旺
罗杰
林杰
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Angang Lianzhong Guangzhou Stainless Steel Co ltd
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Angang Lianzhong Guangzhou Stainless Steel Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

A production method of a cold-rolled nickel-saving austenitic stainless steel 8K mirror surface adopts the production of cold-rolled two-pass rolling annealing sand blasting water washing, heavy brushing acid washing, cold-rolled reciprocating rolling and annealing acid washing. Compared with the prior art, the invention has the advantages that the product meets the requirements of the 8K mirror panel and the added value of the product is improved. The surface roughness of the 2E plate of the cold-rolled nickel-saving austenitic stainless steel produced by the conventional technology is about 2.50-3.5 mu m after hot rolling and acid washing. The invention adds the re-brushing equipment in front of the acid zone, and can control the roughness of the 2E plate surface to be 1.50-2.50 mu m. The surface of the steel strip produced by the invention becomes smooth, the roughness is obviously reduced, no obvious brushing trace exists, and the microscopic surface pits become shallow.

Description

Production method of cold-rolled nickel-saving austenitic stainless steel 8K mirror surface
Technical Field
The invention belongs to the technical field of metallurgical steel rolling, and particularly relates to a production method of a cold-rolled nickel-saving austenitic stainless steel 8K mirror surface.
Background
The hardness of the nickel-saving austenitic stainless steel 2B cold-rolled sheet is higher and is basically more than 220(Hv), and the hardness of the common austenitic stainless steel is only within 200 (Hv). Because of the high hardness of the nickel-saving austenitic stainless steel, the 8K mirror surface plate is easy to generate the sand hole defect when being ground under the condition of higher roughness. The nickel-saving austenitic stainless steel 2B cold-rolled plate produced by the existing cold-rolling production method has high surface roughness, microscopic lower surface roughness and obvious sand holes after grinding, and cannot be used for 8K mirror surfaces.
Disclosure of Invention
The invention aims to provide a production method of a cold-rolled nickel-saving austenitic stainless steel 8K mirror surface, so that a product meets the requirements of an 8K mirror surface plate, and the additional value of the product is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production method of a cold-rolled nickel-saving austenitic stainless steel 8K mirror surface comprises the following steps:
1) the production method comprises the following steps of cold rolling two-pass rolling annealing sand blasting water washing, heavy brushing acid washing, cold rolling reciprocating rolling and annealing acid washing;
2) the black skin feeding rolling is adopted in the cold rolling two-pass rolling, and the rolling reduction rate is more than 25 percent; the annealing temperature is 1120 +/-50 ℃, and the running speed of the steel plate in the furnace zone is less than or equal to 115 mpm;
3) the rolling rate of each pass of reciprocating rolling is more than 50%, the rolling speed is 400-700 m/min, and the oil injection amount is 3500L-4500L, and the total rolling rate of the cold rolling is more than 70%.
The heavy brush pickling is 2 heavy brush pickling devices.
The width of the steel plate is 800-1300 mm.
In the cold rolling two-pass rolling, when the thickness of the hot rolled steel plate after the two-pass rolling is 0.8-2.0 mm, the running speed of the steel plate in a furnace area is less than or equal to 115 mpm; when the thickness of the hot rolled steel plate is 2.20-2.60 mm, the running speed of the steel plate in the furnace zone is less than or equal to 115 mpm.
The thickness of the cold-rolled steel plate in the step 3) is 0.3-1.29 mm.
Compared with the prior art, the invention has the beneficial effects that:
a production method of a cold-rolled nickel-saving austenitic stainless steel 8K mirror surface enables a product to meet the requirements of an 8K mirror surface plate and improves the added value of the product.
After the cold-rolled nickel-saving austenitic stainless steel produced by the conventional technology is subjected to two-pass rolling annealing and acid washing, the surface roughness of a 2E plate is about 2.50-3.5 mu m. The invention adds the re-brushing equipment in front of the acid zone, and can control the roughness of the 2E plate surface to be 1.50-2.50 mu m.
In order to improve the production efficiency, the conventional cold rolling process mostly adopts three times of continuous rolling process production, but the reciprocating rolling process is mainly adopted when producing thin plates with the thickness of below 1.00 mm. When 8K mirror surface plate products are produced, the reciprocating rolling process adopts a work roll with lower roughness, controls the rolling speed well, reduces unnecessary shutdown times, reduces the roughness of the 2B plate surface and is beneficial to improving the sand hole degree.
The surface of the steel strip produced by the invention becomes smooth, the roughness is obviously reduced, no obvious brushing trace exists, and the microscopic surface pits become shallow.
Drawings
Fig. 1 is a picture of the surface roughness of a cold-rolled nickel-saving austenitic stainless steel produced by the prior art.
Fig. 2 is a picture of the surface roughness of a cold-rolled nickel-saving austenitic stainless steel produced according to the present invention.
Detailed Description
The following embodiments are further illustrated by reference to the following specific examples:
a production method of a cold-rolled nickel-saving austenitic stainless steel 8K mirror surface comprises the following steps:
1) the production method comprises the following steps of cold rolling two-pass rolling annealing sand blasting water washing, heavy brushing acid washing, cold rolling reciprocating rolling and annealing acid washing; the parameters of the cold rolling two-pass rolling annealing sand blasting water washing process are shown in the table 1;
TABLE 1
Figure BDA0003368452310000021
The brushing equipment has 2 machines in total, 8 gears are selectable, and a higher gear is generally used. The gears of the two re-brushing machines can be matched at will, the higher the gear of the re-brushing machine is, the higher the pickling efficiency is, and the lower the roughness of the produced 2E plate is.
The parameters of the cold rolling reciprocating type rolling process are shown in a table 2;
TABLE 2
Figure BDA0003368452310000031
Compared with the conventional production process, the production process has the advantages that the working roll with low roughness is adopted for production so as to reduce the frosted sand hole degree of the 2B product.
The parameters of the two-pass rolling annealing pickling process of different hot rolled steel plate thicknesses of the embodiment are shown in the table 3;
TABLE 3
Figure BDA0003368452310000032
The parameters of the cold rolling reciprocating rolling process of different steel plate thicknesses of the embodiment are shown in a table 4;
TABLE 4
Figure BDA0003368452310000033
Fig. 1 and 2 are roughness contrasts of the same area of the prior art product as the product of the present invention, with the arrows pointing to the surface of the steel plate. It can be seen from the figure that slight blisters were seen on the surface of the steel sheet of the present invention in a very small amount.

Claims (5)

1. A production method of a cold-rolled nickel-saving austenitic stainless steel 8K mirror surface is characterized by comprising the following steps:
1) the production method comprises the following steps of cold rolling two-pass rolling annealing sand blasting water washing, heavy brushing acid washing, cold rolling reciprocating rolling and annealing acid washing;
2) the black skin feeding rolling is adopted in the cold rolling two-pass rolling, and the rolling reduction rate is more than 25 percent; the annealing temperature is 1120 +/-50 ℃, and the running speed of the steel plate in the furnace zone is less than or equal to 115 mpm;
3) the rolling rate of each pass of reciprocating rolling is more than 50%, the rolling speed is 400-700 m/min, the oil injection quantity is 3500L-4500L, and the total rolling rate of cold rolling is more than 70%.
2. The method for producing the cold-rolled nickel-saving austenitic stainless steel 8K mirror surface according to claim 1, wherein the heavy brush pickling is 2 heavy brush pickling devices.
3. The method for producing the cold-rolled nickel-saving austenitic stainless steel 8K mirror surface, according to the claim 1, is characterized in that the width of the steel plate is 800-1300 mm.
4. The method for producing the cold-rolled nickel-saving austenitic stainless steel 8K mirror surface, according to the claim 1, is characterized in that the cold rolling is carried out in two times, when the thickness of the hot rolled steel plate after the two times of rolling is 0.8-2.0 mm, the running speed of the steel plate in a furnace zone is less than or equal to 115 mpm; when the thickness of the hot rolled steel plate is 2.20-2.60 mm, the running speed of the steel plate in the furnace zone is less than or equal to 110 mpm.
5. The method for producing the cold-rolled nickel-saving austenitic stainless steel 8K mirror surface according to the claim 1, wherein the thickness of the cold-rolled steel sheet in the step 3) is 0.3-1.29 mm.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115094325A (en) * 2022-07-05 2022-09-23 鞍钢联众(广州)不锈钢有限公司 Ultrapure ferrite stainless steel for elevator panel and manufacturing method thereof
CN115181906A (en) * 2022-07-05 2022-10-14 鞍钢联众(广州)不锈钢有限公司 Ultrapure ferrite stainless steel for high-corrosion-resistance water tank and production method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08117805A (en) * 1994-10-20 1996-05-14 Kawasaki Steel Corp Manufacture of cold rolled stainless steel sheet
JP2002192210A (en) * 2000-12-27 2002-07-10 Nisshin Steel Co Ltd Method for manufacturing high strength austenitic stainless steelsheet
JP2002239604A (en) * 2001-02-15 2002-08-27 Kawasaki Steel Corp Method of manufacturing cold-rolled stainless steel sheet
CN101947549A (en) * 2010-09-10 2011-01-19 山东泰山钢铁集团有限公司 Production technology for inhibiting nickel-saving austenitic stainless steel hot-rolled plate edge crack
CN102605291A (en) * 2012-03-27 2012-07-25 宝山钢铁股份有限公司 Ni-saving austenitic stainless steel cold-rolled sheet with excellent processability and manufacturing method thereof
CN102943219A (en) * 2012-11-23 2013-02-27 四川金广技术开发有限公司 Nickel-saving austenitic stainless steel containing manganese, nitrogen and boron and fabrication method
CN113201636A (en) * 2021-04-21 2021-08-03 鞍钢联众(广州)不锈钢有限公司 Method for producing ultrapure ferrite stainless steel by continuous rolling annealing

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08117805A (en) * 1994-10-20 1996-05-14 Kawasaki Steel Corp Manufacture of cold rolled stainless steel sheet
JP2002192210A (en) * 2000-12-27 2002-07-10 Nisshin Steel Co Ltd Method for manufacturing high strength austenitic stainless steelsheet
JP2002239604A (en) * 2001-02-15 2002-08-27 Kawasaki Steel Corp Method of manufacturing cold-rolled stainless steel sheet
CN101947549A (en) * 2010-09-10 2011-01-19 山东泰山钢铁集团有限公司 Production technology for inhibiting nickel-saving austenitic stainless steel hot-rolled plate edge crack
CN102605291A (en) * 2012-03-27 2012-07-25 宝山钢铁股份有限公司 Ni-saving austenitic stainless steel cold-rolled sheet with excellent processability and manufacturing method thereof
CN102943219A (en) * 2012-11-23 2013-02-27 四川金广技术开发有限公司 Nickel-saving austenitic stainless steel containing manganese, nitrogen and boron and fabrication method
CN113201636A (en) * 2021-04-21 2021-08-03 鞍钢联众(广州)不锈钢有限公司 Method for producing ultrapure ferrite stainless steel by continuous rolling annealing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115094325A (en) * 2022-07-05 2022-09-23 鞍钢联众(广州)不锈钢有限公司 Ultrapure ferrite stainless steel for elevator panel and manufacturing method thereof
CN115181906A (en) * 2022-07-05 2022-10-14 鞍钢联众(广州)不锈钢有限公司 Ultrapure ferrite stainless steel for high-corrosion-resistance water tank and production method thereof

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