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Method for lowering surface roughness of cold-rolled nickel stainless steel bright plate

A surface roughness, stainless steel technology, applied in the field of cold-rolled steel plates, can solve the problems of high surface roughness, lack of mirror effect, whitening, etc., and achieve the effect of reducing surface roughness

Active Publication Date: 2014-06-04
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the surface roughness is high, the surface of the strip steel will be whitish, and the mirror effect cannot be achieved, which will affect the user's use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Take strip steel width 1240mm, raw material thickness 2.0mm, finished product thickness 0.4mm as example

[0025] By setting the following parameters:

[0026] (1) Shot blasting: The shot blasting medium of the shot blasting machine is steel grit, which is only added on the first shot blasting machine, and the subsequent other shot blasting machines use abrasives with attenuated edges and corners;

[0027] (2) Pickling: The type and concentration of the acid solution are: H 2 SO 4 , concentration 240g / L; HNO 3 , the concentration is 130g / L; HF, the concentration is 13g / L; the pickling time is 63s;

[0028] (3) Rolling:

[0029] Total rolling deformation rate=100%×(raw material thickness-finished product thickness) / raw material thickness=100%×(2.0-0.4) / 2.0=80%

[0030] The rolling speed before and after the finished product is 200m / min;

[0031] The roughness of the work roll is 0.1 μm before and after the finished product, and 0.5 μm for other passes...

Embodiment 2

[0034] Embodiment 2: Take strip steel width 1535mm, raw material thickness 3.0mm, finished product thickness 0.8mm as example

[0035] In this embodiment, the following parameters are set:

[0036] (1) Shot blasting: The shot blasting medium of the shot blasting machine is steel grit, which is only added on the first shot blasting machine, and the subsequent other shot blasting machines use abrasives with attenuated edges and corners;

[0037] (2) Pickling: The type and concentration of the acid solution are: H 2 SO 4 , concentration 230g / L; HNO 3 , the concentration is 140g / L; HF, the concentration is 15g / L; the pickling time is 67s;

[0038] (3) Rolling:

[0039] Total rolling deformation rate=100%×(raw material thickness-finished product thickness) / raw material thickness=100%×(3.0-0.8) / 3.0=73.3%;

[0040] The rolling speed before and after the finished product is 200m / min;

[0041] The roughness of the work roll is 0.1 μm before and after the finished product, and...

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Abstract

The invention relates to a method for lowering surface roughness of a cold-rolled nickel stainless steel bright plate. A novel process is designed, and surface roughness of finished belt steel products is lowered by selecting a steel shot of a belt steel shot blasting machine, using acid concentration, pickling time, deformation rate during rolling and rollers and controlling parameters like smooth elongation rate. Any equipment does not need to be added, and surface roughness of the nickel stainless steel bright plate can be effectively lowered to be blew 0.05 micrometer only by improving the process.

Description

technical field [0001] The invention relates to a method for reducing the surface roughness of a cold-rolled nickel-based stainless steel bright plate, which belongs to the technical field of cold-rolled steel plates. Background technique [0002] Cold-rolled stainless steel bright plates (commonly known as mirror panels) are often used as high-grade decorative panels, so the requirements for their surface roughness are very high, generally below 0.05 μm. If the surface roughness is high, the surface of the strip steel will be whitish, and the mirror effect cannot be achieved, which will affect the user's use. [0003] The process flow of stainless steel nickel cold-rolled bright plate is: raw material annealing - scale breaking - shot blasting - pickling - rolling - finished product bright annealing - smoothing - slitting and trimming - packaging. Among them, the key processes that affect the surface roughness of the strip are: strip shot blasting, pickling, rolling and le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04B21B1/24
CPCB21C37/02
Inventor 杨东王树胜孙猛林
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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