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Method for reducing surface roughness of heating plate subjected to shot blasting

A back surface and roughness technology, applied in the field of stainless steel rolling, can solve the problems of unable to meet market demand, high surface roughness of hot plate, lack of shot blasting process, etc., to save shot blasting medium, reduce surface roughness, The effect of reducing the effective particle content

Active Publication Date: 2019-02-15
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, due to the lack of an effective shot blasting process, the surface roughness of the hot plate after shot blasting is relatively high, which cannot meet the market demand

Method used

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  • Method for reducing surface roughness of heating plate subjected to shot blasting
  • Method for reducing surface roughness of heating plate subjected to shot blasting
  • Method for reducing surface roughness of heating plate subjected to shot blasting

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Embodiment

[0047] In the method for reducing the surface roughness after the hot plate shot blasting treatment in the embodiment of the present invention, high-carbon cast steel shot is selected as the shot blasting medium, and the particle size of the steel shot is as shown in the above table 1, and the steel shot is placed in the shot blasting machine. The particle size mixing ratio of the silo in the silo is controlled so that particles with a nominal size of 0.3mm account for about 17%; particles with a size above 0.5mm are less than 5%. Using the method for reducing the surface roughness of the hot plate after shot blasting treatment in this embodiment, the surface roughness Ra of the cold plate after the shot blasting treatment can be reduced from 3.5 μm to 3.1 μm, and the consumption of shot blasting medium per ton of steel is also reduced by 2.06Kg / ton of steel dropped to 1.88Kg / ton of steel, a drop of 8.7%.

[0048] The beneficial effects of the method for reducing the surfac...

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Abstract

The invention provides a method for reducing surface roughness of a heating plate subjected to shot blasting. The method comprises the steps of selecting a shot blasting medium, specifically, steel shots are selected as the shot blasting medium; optimizing the granularity of the steel shots, specifically, the total quantity of the steel shots with the granularity being 0.5 mm or above is smaller than 2%, and the total quantity of the steel shots with the granularity being 0.3-0.425 mm is about 90%; and controlling the stock bin granularity mixing ratio of the steel shots in the stock bin of ashot blaster, specifically, the steel shots with the granularity being 0.3 mm-0.355 mm account for 50% or above, and the steel shots with the granularity being 0.5 mm or above account for less than 5%. By means of the method for reducing surface roughness of the heating plate subjected to shot blasting, the problems that the surface of the heating plate is deeply polished, not ideal in shape, highin roughness and the like can be effectively solved, the maximum cleaning efficiency can be obtained, and the surface roughness of a cooling plate subjected to shot blasting can also be remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of stainless steel rolling, and in particular relates to a method for reducing the surface roughness of a hot plate after shot blasting. Background technique [0002] With the development of the stainless steel industry and the diversification of customer needs, in order to meet the requirements of high-grade decorative materials, the surface properties of the strip need to be improved urgently, especially to improve the surface quality of the strip and reduce the surface roughness of the strip. [0003] In the prior art, pickling is required before subsequent processes after hot rolling and annealing of stainless steel, that is, hot wire pickling of stainless steel. Since the iron scale of stainless steel contains chromium oxide that is more closely combined with the matrix, pickling is difficult. Therefore, in order to improve the pickling effect, pre-treatment before pickling must be carried out before p...

Claims

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Application Information

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IPC IPC(8): B24C1/08B24C7/00B24C9/00
CPCB24C1/08B24C7/0046B24C9/00
Inventor 王建梁敏诤韩勇屈博高佳林赵洪亮
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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