A method of obtaining intergranular fracture in austenitic steel and its application

A technology for austenitic steel and austenitic-based steel, applied in the field of obtaining intergranular fractures in austenitic steel, can solve the problem of affecting the accuracy of analysis results of grain boundary composition of austenitic steel and the difficulty of obtaining grain boundary segregation Behavioral analysis conclusions, difficulty in obtaining intergranular fractures, etc., to achieve the effect of simple and controllable operation steps, easy implementation, and short time-consuming

Active Publication Date: 2018-12-04
BEIJING CISRI GAONA TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the analysis of grain boundary composition of austenitic steel, especially in the study of grain boundary segregation behavior, the key to accurate analysis of grain boundary microdomain composition lies in the acquisition of clean intergranular fractures; but in the prior art, for For austenitic steel, intergranular fractures often only appear under specific conditions, and it is difficult to obtain intergranular fractures with existing technologies; in addition, the preparation of intergranular fractures using existing technologies is complicated, and it is easy to cause austenitic steel fractures during the process. Sample contamination, thus affecting the accuracy of the analysis results of the austenitic steel grain boundary composition, it is difficult to draw an accurate and true analysis conclusion of the grain boundary segregation behavior

Method used

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  • A method of obtaining intergranular fracture in austenitic steel and its application
  • A method of obtaining intergranular fracture in austenitic steel and its application
  • A method of obtaining intergranular fracture in austenitic steel and its application

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Embodiment 1

[0099] A method for obtaining an intergranular fracture in austenitic steel, comprising the steps of:

[0100] (1) Sampling on the nickel-based GH720Li austenitic alloy, cut into rod-shaped samples of Φ4×32mm;

[0101] (2) The sample described in step (1) is derusted, decontaminated, and polished, and then the sample is immersed in a mixed solution of ethanol and acetone with a volume ratio of 1:0.5 and ultrasonically cleaned for 10 minutes. Rinse with deionized water and dry;

[0102] (3) processing the sample described in step (2) into an Auger electron spectrometer standard sample;

[0103] (4) Submerge the sample described in step (3) in a mixture of ethanol and acetone with a volume ratio of 1:0.5 and perform ultrasonic cleaning for 10 minutes, then clean and dry with deionized water;

[0104] (5) Sulfuric acid and methanol mixed solution with a mass ratio of sulfuric acid and methanol of 10:90 are used as the electropolishing solution to electropolish the surface of the ...

Embodiment 2

[0112] A method for obtaining an intergranular fracture in austenitic steel, comprising the steps of:

[0113] (1) Sampling on nickel-based nickel-based GH536 austenitic alloy, cut into rod-shaped samples of Φ4×32mm;

[0114] (2) The sample described in step (1) is derusted, decontaminated, and polished, and then the sample is immersed in a mixed liquid sample of ethanol and acetone with a volume ratio of 1:2 and ultrasonically cleaned for 12 minutes. Rinse with deionized water and dry;

[0115] (3) processing the sample described in step (2) into an Auger electron spectrometer standard sample;

[0116] (4) Submerge the sample described in step (3) with a mixed liquid sample of ethanol and acetone with a volume ratio of 1:2 and perform ultrasonic cleaning for 20 minutes, then clean and dry with deionized water;

[0117] (5) Sulfuric acid and methanol mixed solution with a mass ratio of sulfuric acid and methanol of 20:80 are used as the electropolishing solution to electropo...

Embodiment 3

[0125] A method for obtaining an intergranular fracture in austenitic steel, comprising the steps of:

[0126] (1) Sampling on the nickel-based GH720Li austenitic alloy, cut into rod-shaped samples of Φ4×32mm;

[0127] (2) The sample described in step (1) is derusted, decontaminated, and polished, and then the sample is immersed in a mixture of ethanol and acetone with a volume ratio of 1:1 and ultrasonically cleaned for 15 minutes. Rinse with deionized water and dry;

[0128] (3) processing the sample described in step (2) into an Auger electron spectrometer standard sample;

[0129] (4) Submerge the sample described in step (3) in a mixed liquid sample of ethanol and acetone with a volume ratio of 1:1 and perform ultrasonic cleaning for 15 minutes, then clean and dry with deionized water;

[0130] (5) Sulfuric acid and methanol mixed solution with a mass ratio of sulfuric acid and methanol of 15:85 are used as the electropolishing solution to electropolish the surface of t...

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Abstract

The invention provides a method for obtaining an intergranular fracture from austenite steel and application of the method. According to the method, after the surface of an austenite steel sample is electrolytic-polished, the austenite steel sample is subjected to cathodic hydrogen charging; then the two ends of the austenite steel sample are clamped for a while, and the austenite steel sample is put into a surface analyzing device; under the vacuum environment, the preset fracture of the austenite steel sample is primarily pressed for many times, then the preset fracture of the austenite steel sample is pressed to be broken at a time, and the intergranular fracture is obtained. The method is simple in technique and short in time consumption; operation steps are simple and controllable and easy to achieve; and the austenite steel fracture obtained through the method is a typical intergranular fracture, pollution can be effectively avoided, objective and accurate evidences can be provided for component analysis of a grain boundary, and the intergranular fracture is applicable to component analysis of the grain boundary of austenite steel.

Description

technical field [0001] The invention relates to the technical field of iron and steel material analysis, in particular to a method for obtaining an intergranular fracture in austenitic steel and its application. Background technique [0002] In the analysis of grain boundary composition of austenitic steel, especially in the study of grain boundary segregation behavior, the key to accurate analysis of grain boundary microdomain composition lies in the acquisition of clean intergranular fractures; but in the prior art, for For austenitic steel, intergranular fractures often only appear under specific conditions, and it is difficult to obtain intergranular fractures with existing technologies; in addition, the preparation of intergranular fractures using existing technologies is complicated, and it is easy to cause austenitic steel fractures during the process. The contamination of the sample will affect the accuracy of the analysis results of the austenitic steel grain bounda...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/24G01N1/32
CPCC25F3/24G01N1/286G01N1/32
Inventor 王凯石照夏王民庆
Owner BEIJING CISRI GAONA TECH
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