IF steel metallographic corrosive agent

A technology of etchant and hydrochloric acid, which is applied in the field of metallographic etchant, can solve the problems of unclear metallographic structure, heavy workload of metallographic sample preparation, cumbersome corrosion steps, etc., and achieve clear metallographic structure, convenient operation and short corrosion time Effect

Inactive Publication Date: 2018-04-13
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two patents can clearly show the metallographic structure of IF steel, but two kinds of corrosive agents need to be configured, and the etching steps are cumbersome. to a larger workload

Method used

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  • IF steel metallographic corrosive agent
  • IF steel metallographic corrosive agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 100ml of pure water and 15ml of hydrochloric acid, then add 10g of ferric chloride, stir evenly and filter out the precipitate in the solution to obtain the filtered solution. After the IF steel is subjected to conventional sample mounting, rough grinding, fine grinding and polishing, Wipe the sample with this corrosive agent for 3-5 seconds at room temperature, and then a clear IF steel metallographic structure can be observed.

Embodiment 2

[0022] Mix 150ml of pure water and 40ml of hydrochloric acid, then add 15g of ferric chloride, stir evenly and filter out the precipitate in the solution to obtain the filtered solution. After the IF steel is subjected to conventional sample mounting, rough grinding, fine grinding and polishing, After wiping the sample with this corrosive agent for 3-5 seconds, a clear IF steel metallographic structure can be observed.

Embodiment 3

[0024] Mix 110ml of pure water and 10ml of hydrochloric acid, then add 5g of ferric chloride, stir evenly and filter out the precipitate in the solution to obtain the filtered solution. After the IF steel is subjected to conventional sample mounting, rough grinding, fine grinding and polishing, After wiping the sample with this corrosive agent for 3-5 seconds, a clear IF steel metallographic structure can be observed.

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Abstract

The invention provides an IF steel metallographic corrosive agent. The IF steel metallographic corrosive agent comprises 10%-40% of hydrochloric acid, 4%-12% of ferric chloride, and the balance pure water; and after mixing the substances, precipitate can be filtered to obtain a corrosive agent, and a prepared IF steel sample is wiped with the corrosive agent at a normal temperature for 3-5 secondsto obtain a clear IF steel metallographic structure. According to the IF steel metallographic corrosive agent, the corrosion time is short, the corrosion step is simple, and the operation is easy.

Description

technical field [0001] The invention belongs to the technical field of IF steel metallographic observation and relates to a metallographic etchant suitable for IF steel. Background technique [0002] IF steel, that is, interstitial-free steel, sometimes called ultra-low carbon steel, has excellent deep drawing properties and is widely used in the automobile and home appliance industries. In actual production, a small amount of Ti and Nb elements are generally added to fix the C and N interstitial atoms in the steel to form carbonitrides, thereby obtaining pure ferritic steel without interstitial atoms. [0003] Since the IF steel is relatively pure, the metallographic structure is a pure ferrite structure, and there are no residual interstitial atoms at the grain boundaries, so it is difficult to obtain a clear structure morphology with the low-carbon ferritic steel metallographic corrosion agent nitric acid alcohol solution for IF steel. Therefore, it has caused great diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28G01N1/32
CPCC23F1/28G01N1/32
Inventor 刘新院吴圣杰陈爱华李化龙
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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