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Control method for eliminating chromatic aberration defects of secondary cold rolling of 400-series stainless steel

A technology of secondary cold rolling and control method, which is applied in the direction of rolling mill control device, metal rolling, metal rolling, etc. It can solve the problems that cannot be eliminated in the follow-up process, color difference defect, production cost increase, etc., and achieve the elimination of secondary cold rolling Effect of chromatic aberration defects and improvement of surface quality

Inactive Publication Date: 2021-03-16
SHANXI TAIGANG STAINLESS STEEL CO LTD
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AI Technical Summary

Problems solved by technology

The 400 series stainless steel cold plate is rolled by Sendzimir 20-high rolling mill, which adopts multi-pass reversible rolling, and the surface control is difficult. During the secondary cold rolling process, color difference defects appear on the surface, which cannot be eliminated in subsequent processes, which seriously affects customer use. , leading to a substantial increase in production costs
The chromatic aberration defect of the secondary cold rolling of 400 series stainless steel is the appearance of single or multiple chromatic aberrations on the upper and lower surfaces of the strip along the rolling direction. It occurs in the first pass and cannot be eliminated after replacing the new work rolls in subsequent passes. After the defect is more obvious

Method used

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Examples

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Effect test

Embodiment

[0008] Example: A roll of 0.4*1540mm 430 steel type bright plate rolled by Sendimier 20-high rolling mill, 1.2mm rolled to 0.4mm, 8 rolling passes, the deformation rate of the first pass during the rolling process is 13.5% , the roughness of the work rolls in the first pass is 0.853μm, the rolling pressure mode of the first pass adopts the constant pressure mode, and the edge shape value is 20N / mm 2 .

[0009] Bright degreasing annealing was carried out after rolling, and the surface was visually inspected after annealing. No rolling stripe color difference surface defects were found on the surface of the steel plate, and the surface quality reached the expected effect.

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Abstract

The invention discloses a control method for eliminating chromatic aberration defects of secondary cold rolling of 400-series stainless steel, and belongs to the technical field of stainless steel rolling. The first-pass deforming rate is 10-16%; the roughness of a first-pass working roll is 0.5-2.0 mu m; a constant-pressure mode is adopted as a first-pass rolling pressure mode; and a first-pass plate shape curve adopts a structure that two sides are bent upwards, the middle part is horizontal, two sides and the middle part are in smooth transition, and the edge plate shape value is 0-30N / mm<2>. According to the method, the secondary cold rolling color difference defect of the 400-series stainless steel is eliminated, and the surface quality of a 400-series stainless steel cold plate is improved.

Description

technical field [0001] The invention relates to cold rolling of stainless steel, mainly secondary cold rolling of 400 series stainless steel bright plates, and specifically a method for controlling color difference defects in secondary rolling of 400 series stainless steel. Background technique [0002] 400 series stainless steel is a special product developed by TISCO. It has the advantages of superior corrosion resistance and high surface quality. It is widely used in high-end decoration industries such as elevators, home appliances, and urban landscapes. The 400-series stainless steel secondary cold-rolled material with high utilization rate and high product added value is sought after by the market, and the demand is increasing year by year. Customers have extremely high requirements on the surface of the product. The quality control level of the manufacturing enterprise poses challenges. The 400 series stainless steel cold plate is rolled by Sendzimir 20-high rolling m...

Claims

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Application Information

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IPC IPC(8): B21B37/00
CPCB21B37/00
Inventor 孟保功李胜雄李旭初
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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