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Rolling method for solving surface wrinkling problem of ferritic stainless steel

A stainless steel and ferrite technology, applied in metal rolling, metal rolling, tool manufacturing, etc., can solve problems such as ineffective effects, achieve improvement in roughness changes, eliminate part of the surface defects, and improve surface wrinkling Effect

Inactive Publication Date: 2014-01-15
BAOSTEEL STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through the method provided above, the effect is not obvious for medium chromium ferritic stainless steel SUS444 containing 16%~20% chromium and C+N≤250ppm

Method used

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  • Rolling method for solving surface wrinkling problem of ferritic stainless steel
  • Rolling method for solving surface wrinkling problem of ferritic stainless steel
  • Rolling method for solving surface wrinkling problem of ferritic stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0045] An example of a rolling method for improving surface wrinkling of ferritic stainless steel provided by the present invention is given below.

[0046] The following are the main process parameters of the examples of experimental verification for different thicknesses. These experimental examples are only descriptions of the best implementation modes of the present invention, and do not limit the scope of the present invention in any way.

[0047] Table 3 Process parameters and wrinkle detection Pt of Examples 1-4

[0048] Example

1

2

3

4

Thickness of hot-rolled incoming sample (mm)

6.0

6.0

5.5

5

Thickness after single pass rolling (mm)

5.1

4.9

4.2

3.5

Single pass reduction rate (%)

15

18.33

23.64

30

Intermediate annealing temperature (°C)

1020

1050

1000

950

Holding time(min / mm)

1

0.8

0.6

...

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PUM

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Abstract

The invention relates to a rolling method for solving the surface wrinkling problem of ferritic stainless steel. The rolling method comprises the following steps that firstly, a casting blank is formed through smelting and casting; secondly, hot rolling is conducted on the casting blank. The rolling method further comprises the following steps that thirdly, single-pass cold rolling is conducted; fourthly, intermediate annealing acid picking is conducted; fifthly, a plate band obtained after the annealing process in the fourth step is ground with number 240 sand rubber; sixthly, cold rolling is conducted; seventhly, final annealing acid picking is conducted. According to the rolling method, single-pass cold rolling, rough grinding conducted after intermediate annealing and cold rolling conducted through cold rolls with different roughness are adopted, and the rolling method can effectively solve the 2B surface wrinkling problem of the medium chromium pure ferritic stainless steel.

Description

technical field [0001] The invention relates to a rolling method, in particular to a rolling method for improving the surface wrinkling of ferritic stainless steel, which is mainly suitable for improving the medium chromium series containing 16%~20% chromium and C+N≤250ppm Surface wrinkling of ferritic stainless steel SUS444 etc. Background technique [0002] Medium-chromium pure ferrite (containing a small amount of stabilizing elements) containing 16%~20% chromium and C+N≤250ppm, such as SUS444, generally does not contain nickel or only contains a small amount of nickel. It is a nickel-saving stainless steel, not only It has good resistance to chloride stress corrosion, pitting corrosion, crevice corrosion and other local corrosion properties. Compared with austenitic stainless steel, it has a low tendency to cold work hardening, a large thermal conductivity, and a small linear expansion coefficient. Stress corrosion resistance, has a wide range of applications and broad ...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B15/00C21D8/02
Inventor 徐军
Owner BAOSTEEL STAINLESS STEEL
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