Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling

A technology of stainless steel strip and continuous cold rolling, applied in workpiece surface treatment equipment, metal rolling, metal rolling, etc., can solve the problems of obvious periodicity of surface textured pattern, unsatisfactory textured effect, and reduced yield. , to ensure the mechanical properties of the product, reduce the leveling process, improve the yield and pass rate

Active Publication Date: 2013-10-30
BAOSTEEL DESHENG STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] If the method of producing textured surface stainless steel with a 20-high reversing rolling mill is added, the cost will increase and the yield will decrease if the heat treatment an...

Method used

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  • Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling
  • Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling
  • Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] When the hot-rolled raw material coil with a thickness of 4.0mm is rolled by a five-stand tandem cold rolling mill, the surface roughness and reduction rate of the work rolls of each stand must be strictly controlled. The working roll width of the rolling mill is 1780mm, the diameter is 450mm, and the maximum rolling force is 27000kN. The work rolls are ground by 80-mesh grinding wheels. The surface roughness of the rolls from the first to the fourth stands are 0.93μm, 0.88μm, 0.72μm and 0.55μm respectively, and the reduction rates of the first to fifth stands are 26.3%, 25.9 %, 22.3%, 20.2%, 3.5%. The grinding roughness of the work rolls of the fifth stand was 1.2 μm. The roughness Ra of the roll after texturing is 3.8 μm, and the number of peaks is 60 peaks / cm. The textured rolls are chrome-plated. The kinematic viscosity (40°C) of the oil-in-water emulsion used is 60mm 2 / s, the oil concentration is 2.3wt%, and the strip is cooled to 90°C after rolling. The exit...

Embodiment 2

[0034] When the hot-rolled raw material coil with a thickness of 3.0mm is rolled by a five-stand tandem cold rolling mill, the surface roughness and reduction rate of the work rolls of each stand must be strictly controlled. The working roll width of the rolling mill is 1780mm, the diameter is 400mm, and the maximum rolling force is 27000kN. The working rolls of the rolling mill are ground by 80-mesh grinding wheels. The surface roughness of the rolls from the first to the fourth stands are 1.04μm, 0.86μm, 0.75μm, and 0.51μm respectively, and the reduction rates of the first to fifth stands are 32.2%, 34.1%, 27.4%, 25.2%, 4.0%. The grinding roughness of the work rolls of the fifth stand was 1.1 μm. The roughness Ra of the roll after texturing is 3.6 μm, and the number of peaks is 71 peaks / cm. The textured rolls are chrome-plated. The kinematic viscosity (40°C) of the emulsion used is 70mm 2 / s, the concentration is 4.1wt%, and the strip is cooled to 95°C after rolling. Th...

Embodiment 3

[0036]When the hot-rolled raw material coil with a thickness of 6.0mm is rolled by a five-stand tandem cold rolling mill, the surface roughness and reduction rate of the work rolls of each stand must be strictly controlled. The working roll width of the rolling mill is 1420mm, the diameter is 300mm, and the maximum rolling force is 23000kN. The work rolls of the rolling mill are ground by 80-mesh grinding wheels. The surface roughness of the rolls from the first to the fourth stands are 1.21 μm, 0.91 μm, 0.73 μm, and 0.43 μm respectively, and the reduction rates of the first to fifth stands are 33.3%, 22.5%, 16.1%, 15.4%, 9.1%. The grinding roughness of the work rolls of the fifth stand was 1.2 μm. The roughness Ra of the roll after texturing is 3.8 μm, and the number of peaks is 58 peaks / cm. The textured rolls are chrome-plated. The kinematic viscosity (40°C) of the emulsion used is 95mm 2 / s, the concentration is 8.3wt%, and the strip is cooled to 120°C after rolling. T...

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Abstract

A method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling comprises that (1), a five-rack serial type cold continuous rolling is performed, a five-rack serial type cold continuous rolling unit is adopted, the diameter of a working roll of each rolling mill is 300-500mm, and endless rolling is performed; the roughness degrees of the rolls of the first rack to the fourth rack are in a range of 0.5-1.0mum and decrease sequentially; the working roll of the fifth rack is subjected to roughening and chromium plating treatment; an emulsion lubrication rolling mode is adopted, the temperature of an emulsion is 50-60DEG C, the emulsion is sprayed to roll gaps for cooling and lubricating, the temperature of cold-rolled band steel is controlled below 150DEG C; the accumulated reduction rate of the first rack to the fourth rack is larger than 60%, the reduction rate of the fifth rack is in a range of 4-10%, and the roughness of the cold-rolled band steel is controlled in a range of 0.5-1.0mum; (2), the cold-rolled band steel is subjected to annealing acid picking treatment, heating and annealing are performed in a continuous horizontal gas furnace, the annealing temperature is in a range of 800-1000DEG C, and recrystallization of the band steel is finished; finished surfaces are obtained finally through electrolytic picking by Na2SO4 and H2SO4 solutions and soaking picking by a nitric acid and hydrofluoric acid mixed acid solution sequentially after annealing.

Description

technical field [0001] The invention relates to a stainless steel material and a manufacturing method thereof, in particular to a method for producing a textured surface ferritic stainless steel strip by continuous cold rolling Background technique [0002] According to the standard GB / T 3280-2007 "Stainless Steel Cold Rolled Steel Sheet and Strip", the surface processing types of stainless steel include 2D surface, 2B surface, BA surface, 3# surface, HL surface, etc. Among them, the 2D surface processing technology is heat treatment and pickling after cold rolling to obtain a matte surface, and then smoothed by a rough surface roller to obtain a textured surface product. However, since this production process needs to carry out an independent rough surface roll smoothing process after cold rolling, it will bring about a decline in yield and an increase in production costs. [0003] Due to the matt properties of textured surface stainless steel, it is widely used in industr...

Claims

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Application Information

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IPC IPC(8): B21B1/28B21B15/00B21B45/02
Inventor 沈继程付博曹勇李鑫蔡冬敏邢德茂韩武强胡文韬
Owner BAOSTEEL DESHENG STAINLESS STEEL
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