Method for evaluating reliability of shot blasting part with X-ray diffraction technology

Abstract

The invention relates to a method for evaluating reliability of a shot blasting part with an X-ray diffraction technology. The method comprises steps as follows: firstly, changing rules of residual stress relaxation and diffraction FWHM (full width at half maximum) of a part material after shot blasting under actions of different loads are acquired with an X-ray diffraction method, and a safe area and a non-safe area of the material during use are determined according to the rules; secondly, a key point of the shot blasting part is subjected to residual stress testing after used for different time periods, and changing rules of residual stress and diffraction full width at half maximum of the key point of the part are acquired. On the basis, whether actually measured residual stress / diffraction FWHM changing rules of the part are in the safe area is analyzed and compared, so that the reliability of the part is determined. The method is a non-destructive testing and analysis method, and can irregularly detect the part to determine whether the part is safe and reliable. One convenient and efficient method is provided for evaluation of the reliability of the part.

Description

technical field [0001] The invention relates to a component detection, in particular to a method for evaluating the reliability of shot-peened components by using X-ray diffraction technology to measure the residual stress and the diffraction half-height width of key points of metal components. Background technique [0002] Predicting the reliability of key components has always been a hot and difficult research topic in the mechanical field. For the reliability test of important components, there are shortcomings such as long test time, heavy workload, and high cost. The reliability of the material is closely related to the deformation of the material surface. During the processing of the parts, in order to improve the service life of the parts, shot peening treatment is often carried out on the surface to form residual compressive stress on the surface. However, during the use of the parts, due to the external force load, the residual compressive stress will relax. In the...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the difficult problem of predicting the reliability of key parts, the present invention proposes a method for evaluating the reliability of shot blasting parts by using X-ray diffraction technology, which is simple and quick to use the detection and evaluation of residual stress and diffraction half maximum width Component reliability

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