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Method for measuring residual austenite content in steel

A technology of retained austenite and austenite, which is applied in the field of determination of retained austenite in steel, can solve problems such as inability to complete measurement work, and achieve the effect of eliminating influence and reducing error

Inactive Publication Date: 2010-09-01
武钢集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method needs to be carried out on an X-ray diffractometer with a texture accessory (polar figure device), and the conventional X-ray diffractometer cannot complete the measurement work that can effectively eliminate the texture

Method used

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  • Method for measuring residual austenite content in steel
  • Method for measuring residual austenite content in steel
  • Method for measuring residual austenite content in steel

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Embodiment Construction

[0059] A method embodiment of the present invention for measuring retained austenite content in steel, its measuring equipment is mainly X-ray diffractometer, such as figure 1 , 2 As shown, the X-ray diffractometer includes a radiation source 1, a detector 2, and a goniometer. The goniometer is composed of a 1θ axis 4 and a 2θ axis 5. The detector 2 is set on the 2θ axis 5, and the sample or standard sample 3 Placed on 1θ axis 4.

[0060] The inventive method comprises the following steps:

[0061] Step (1), before the experimental measurement, first prepare a piece of iron and steel material sample i, which contains austenite (γ phase) and martensite (α phase), or austenite (γ phase) At the same time, a standard sample j of block pure martensite or pure ferrite should be prepared. The physical state and chemical composition of standard sample j and sample i should preferably be the same or similar. There is no texture in j, the test sample i and the standard sample j are m...

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Abstract

The invention relates to a method for measuring residual austenite content in steel. The measuring equipment is mainly an X-ray diffractometer, and the method for measuring the residual austenite content in steel is characterized by comprising the following steps of: (1) preparing block steel material test samples and standard samples, wherein texture is absent in the standard samples, and removing the surface residual stress of the test samples and standard samples; (2) testing; and (3) calculating to obtain the austenite content in the test samples according to the peak intensity and left and right back intensity of the test samples and standard samples measured in the step (2). The method can measure the residual austenite in the steel on the conventional X-ray diffractometer, and the measured result is close to the true value and has low error.

Description

technical field [0001] The invention relates to a method for measuring retained austenite in steel, in particular to a method for measuring the content of retained austenite in steel by using an X-ray diffractometer. Background technique [0002] Metal materials, especially iron and steel materials, often have a certain amount of retained austenite after quenching, and the content of retained austenite has an important impact on the properties of the material. Therefore, in order to improve the mechanical properties and service life of the material, it is necessary to accurately measure the content of austenite in the material, so as to adopt a reasonable heat treatment system to control the content of austenite in the material. There are sometimes serious textures in iron and steel materials (especially plates). When there are austenite and martensite in these materials, the conventional method is currently used to measure the method specified in the industry standard YB / T5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20
Inventor 周顺兵李长一陈士华吴立新张彦文张敏
Owner 武钢集团有限公司
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