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Method for reducing medium-chromium ferritic stainless steel surface rough belt

A technology with rough surface and stainless steel, applied in the field of steel rolling, can solve problems such as the impact of product quality, and achieve the effect of reducing surface roughness, reducing production cost and improving production efficiency

Active Publication Date: 2019-09-20
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such defects have a serious impact on product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The thickness of the rolled product is 3.0mm type 430 stainless steel, including, for the casting slab with poor surface quality, the continuous casting slab is ground by full surface grinding, and the grinding rate is 3.0%. For the continuous casting slab with good surface, no grinding is required , go directly to the next process.

[0034] The continuous casting slab is heated and kept warm by a walking heating furnace. The ambient temperature is 5°C, the furnace temperature in the heat recovery section is 650°C for 60 minutes, the furnace temperature in the preheating section is 900°C for 40 minutes, and the first heating section The furnace temperature is 1000°C for 40 minutes, the second heating section is 1180°C for 50 minutes, the soaking section is 1220°C for 50 minutes, and the oxygen content in the gas is 1.1%.

[0035] Ultra-high pressure descaling equipment is used to remove the iron sheet on the surface of the slab. The descaling pass is 1 time, and the des...

Embodiment 2

[0040] The thickness of the rolled product is 4.0mm 430 stainless steel, including, for the casting slab with poor surface quality, the continuous casting slab is ground by full surface grinding, and the grinding rate is 3.0%, and the continuous casting slab with good surface does not need to be ground , go directly to the next process.

[0041] The continuous casting slab is heated and kept warm by a walking heating furnace. The ambient temperature is 25°C. The furnace temperature in the heat recovery section is 700°C for 55 minutes. The furnace temperature in the preheating section is 950°C for 50 minutes. The first heating section The furnace temperature is 1050°C for 45 minutes, the second heating section is 1145°C for 40 minutes, the soaking section is 1185°C for 50 minutes, and the oxygen content in the gas is 0.8%.

[0042] Ultra-high pressure descaling equipment is used to remove the iron sheet on the surface of the slab. The descaling pass is 1 time, and the descaling...

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Abstract

The invention belongs to the field of steel rolling, and relates to a method for reducing a medium-chromium ferritic stainless steel surface rough belt. The method for reducing the medium-chromium ferritic stainless steel surface rough belt sequentially comprises the steps of heating, descaling at ultrahigh pressure, rough rolling and fine rolling, wherein when the temperature of the nature is smaller than 20 DEG C, the furnace temperature of a heating zone for heating is 1150 to 1200 DEG C, and the furnace temperature of a soaking zone is 1200 to 1250 DEG C; and when the temperature of the nature is more than 20 DEG C, the furnace temperature of the heating zone 1100 to 1160 DEG C, and the furnace temperature of the soaking zone is 1150 to 1200 DEG C. According to the method for reducing the medium-chromium ferritic stainless steel surface rough belt provided by the invention, the ferritic stainless steel surface rough belt is reduced, and the stable mass production of chromium ferritic stainless steel is realized.

Description

technical field [0001] The invention belongs to the field of steel rolling and relates to a method for reducing the surface roughness of medium-chromium ferritic stainless steel. Background technique [0002] Medium chromium ferritic stainless steel generally refers to stainless steel with a chromium content of 16%-18% and a nickel content of ≤0.60%. During the production process, the surface of this type of stainless steel often produces surface roughness band defects, which are specifically manifested as band-shaped defects distributed intermittently within 300mm from the edge of the strip. Such defects have had a serious impact on product quality. Therefore, it is necessary to find a way to reduce the roughness of the strip surface. Contents of the invention [0003] The purpose of the present invention is to provide a method for reducing the surface roughness of medium chromium ferritic stainless steel through theoretical analysis and production practice aiming at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/02B21B37/74B21B37/00
CPCB21B3/02B21B37/00B21B37/74
Inventor 杨永超白晋钢郭永亮杨东赵建伟
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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