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Method for Determining Martensite Content in Austenitic Stainless Steel Materials

A technology of austenitic stainless steel and martensite, which is applied in the fields of material magnetic variable, material analysis, and material analysis through electromagnetic means, can solve the problems of unintuitive detection results of martensite content and low detection efficiency, and achieve improvement Improve the efficiency of on-site detection and improve the effect of scanning coverage

Active Publication Date: 2022-04-08
CHINA SPECIAL EQUIP INSPECTION & RES INST
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for determining the content of martensite in austenitic stainless steel materials, so as to solve the problems of unintuitive detection results and low detection efficiency of austenitic stainless steel martensite content in the prior art

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  • Method for Determining Martensite Content in Austenitic Stainless Steel Materials

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[0025] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0027] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish simila...

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Abstract

The invention provides a method for determining the content of martensite in austenitic stainless steel materials, which comprises the steps of obtaining a series of samples with different martensite contents by drawing a strip sample of austenitic stainless steel; according to the eddy current array of the series of samples Detection experiment and optimization of detection parameters; according to the martensite content and the characteristic color of the corresponding eddy current array C-scan image, the martensite content evaluation color card is made; the eddy current array scan is performed on the inspected workpiece; the martensite content is locked by color judgment Exceeding the standard area, and can quickly evaluate the martensite content. The eddy current array probe used in this method contains several detection units, which greatly expands the coverage of one-time scanning; the martensite content evaluation color card method can intuitively and quickly lock the area where the martensite content exceeds the standard and can monitor the martensite content. Rapid evaluation improves the detection efficiency, and is suitable for rapid detection and evaluation of the position where the martensite content exceeds the standard in the field of austenitic stainless steel pressure equipment.

Description

technical field [0001] The invention relates to the technical field of martensite detection, in particular to a method for determining the content of martensite in austenitic stainless steel materials. Background technique [0002] The common failure modes of austenitic stainless steel pressure equipment are stress corrosion cracking or pitting corrosion, which are related to the martensite content. There are many measurement methods or detection methods for the content of martensite in common austenitic stainless steels, but the detection speed is slow and the detection results are not intuitive. [0003] The X-ray diffraction method has high requirements on the surface of the workpiece detection point and takes a long time to prepare the workpiece. This method belongs to the point measurement method, and the coverage of one-time measurement is small, so it is not suitable for on-site measurement. Density measurement, magnetic balance method and Satmagan measurement method...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N27/90G01N27/9013G01N27/904
CPCG01N1/286G01N27/904
Inventor 李运涛
Owner CHINA SPECIAL EQUIP INSPECTION & RES INST
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