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Ultra-supercritical steel organization display method

A technology of ultra-supercritical steel and display method, which is applied in the field of metallographic sample preparation and structure observation, can solve the problems of difficult and accurate evaluation of ultra-supercritical steel structure thickness and uniformity, and achieve the effect of simple operation

Active Publication Date: 2008-09-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for displaying the microstructure of ultra-supercritical steel to solve the problem that it is difficult to accurately evaluate the microstructure and uniformity of ultra-supercritical steel

Method used

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  • Ultra-supercritical steel organization display method
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  • Ultra-supercritical steel organization display method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Grinding-polishing

[0025] a. Sample grinding: after 60 # →150 # →240 # →400 # →600 # →800 # →1000 # →1200 # Grinding with silicon carbide water sandpaper, use water as lubricant. The speed of the grinding disc is 100-150 rpm to avoid scratches. Every time the sandpaper is changed during grinding, the sample should be rotated 90 degrees in the same direction, and ground until the wear marks of the new sandpaper on the grinding surface of the sample cover the wear marks of the previous sandpaper.

[0026] b. Sample polishing: after 1200 # The sample polished by silicon carbide water sandpaper is placed on a polishing flannelette for polishing. Use water as a lubricant, first use 3.5μ diamond polishing paste for rough polishing, throw away the scratches on the polished surface of the sample, and then use 1.5μ diamond polishing paste for fine polishing to make the polished surface bright, and use alcohol Dehydrate and dry. Multiple passes of coarse and fine...

Embodiment 2

[0033] 1. Grinding-polishing

[0034] a. Sample grinding: after 60 # →150 # →240 # →400 # →600 # →800 # →1000 # →1200 # Grinding with silicon carbide water sandpaper, use water as lubricant. The speed of the grinding disc is 100-150 rpm to avoid scratches. Every time the sandpaper is changed during grinding, the sample should be rotated 90 degrees in the same direction, and ground until the wear marks of the new sandpaper on the grinding surface of the sample cover the wear marks of the previous sandpaper.

[0035] b. Sample polishing: after 1200 # The sample polished by silicon carbide water sandpaper is placed on a polishing flannelette for polishing. Use water as a lubricant, first use 3.5μ diamond polishing paste for rough polishing, throw away the scratches on the polished surface of the sample, and then use 1μ diamond polishing paste for fine polishing to make the polished surface bright, and use alcohol to dehydrate drying. Multiple passes of coarse and fine...

Embodiment 3

[0042] 1. Grinding-polishing

[0043] a. Sample grinding: after 60 # →150 # →240 # →400 # →600 # →800 # →1000 # →1200 # Grinding with silicon carbide water sandpaper, use water as lubricant. The speed of the grinding disc is 100-150 rpm to avoid scratches. Every time the sandpaper is changed during grinding, the sample should be rotated 90 degrees in the same direction, and ground until the wear marks of the new sandpaper on the grinding surface of the sample cover the wear marks of the previous sandpaper.

[0044] b. Sample polishing: after 1200 # The sample polished by silicon carbide water sandpaper is placed on a polishing flannelette for polishing. Use water as a lubricant, first use 2.5μ diamond polishing paste for rough polishing, throw away the scratches on the polished surface of the sample, and then use 0.5μ diamond polishing paste for fine polishing to make the polished surface bright, and use alcohol Dehydrate and dry. Multiple passes of coarse and fine...

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Abstract

The invention relates to the technical field of metallographical sample preparation and tissue observation. The invention relates to a tissue display method for ultra-supercritical steel with the advantages of high alloy content, high anti-corrosion and excellent oxidation resistance in particular. The technique steps of the method includes: firstly adopting a standard grinding-polishing method on an ultra-supercritical steel sample; then selecting a commonly used electrolyte to carry out electrolytic etching with high voltage and high current on the sample; finally combining a mechanical polishing method to finally display a clear original austenite crystal grain boundary. The invention can clearly, completely and independently display the original austenite crystal grain boundary of the ultra-supercritical steel; thereby being able to fully reflect the size and the distribution of the original austenite crystal grain and solving the problem of being harder to precisely assess the thickness and the uniformity of the ultra-supercritical steel tissue.

Description

Technical field: [0001] The invention relates to the technical field of metallographic sample preparation and structure observation, in particular to a method for displaying the structure of ultra-supercritical steel with high alloy content, strong corrosion resistance and good oxidation resistance. In the process of evaluating and homogeneity, the complete size and distribution of prior austenite can be obtained, and finally accurate inspection results can be obtained. Background technique: [0002] As we all know, the microstructure thickness and uniformity of steel have a great influence on various performance indicators of steel, and the evaluation of steel microstructure thickness and uniformity has important index significance in actual production. For high-hardenability steels that have been quenched, high-temperature tempered or quenched and tempered, the grain size of prior austenite formed during austenitization plays a decisive role in the thickness and uniformity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/06G01N1/32
Inventor 胡小强罗兴宏康秀红王野李殿中
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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