Correction method of influence of pore diameter on evaluating stress of metal materials through critical refraction longitudinal waves

Abstract

The present invention discloses a correction method of influence of a pore diameter on evaluating stress of metal materials through critical refraction longitudinal waves. The method comprises: optimizing the center frequency and the propagation distance of a dual-critical refraction longitudinal wave probe, signal amplitudes received by the critical refraction longitudinal wave are taken as evaluation parameters, the critical refraction longitudinal wave detection depth is determined by combining an equivalent method, and regular blind holes with a constant processing depth and different diameters are configured to simulate internal pores. A probe clamping device with adjustable pressure is employed to collect critical refraction longitudinal wave signals, the time difference of the critical refraction longitudinal waves passing through the same propagation distance is taken as a stress evaluation parameter, and the relationship between the critical refraction longitudinal wave propagation time difference of each blind hole with different diameters and the stress is built, so that the relation of the critical refraction longitudinal wave sound elastic coefficient and the diameters of the blind holes is obtained, and the correction of the influence of the pore diameters on evaluating stress through critical refraction longitudinal waves. The correction method of influence of a pore diameter on evaluating stress of metal materials through critical refraction longitudinal waves is lossless and rapid, etc.

Description

technical field [0001] The invention relates to a correction method for evaluating the stress of a metal material by a critical refraction longitudinal wave affected by the diameter of a pore, and specifically relates to a non-destructive method for evaluating stress by a critical refraction longitudinal wave. Background technique [0002] The failure of key components of construction machinery equipment is the main reason for the overall failure of construction machinery equipment. In order to reduce casualties and safety accidents, construction machinery equipment is scrapped when it still has a certain service life. For this reason, our country recycles a large amount of iron and steel engineering machinery and equipment in the form of scrap steel every year, and reprocesses them as primary materials. The goals of social sustainable development run counter to each other. Therefore, it is extremely important to explore the evaluation methods that can realize the service s...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a correction method for evaluating the stress of metal materials in which the diameter of the pores affects the critical refraction longitudinal wave, combined with the "equivalent method", to simulate internal pores with regular blind holes, and solve the internal pores of metal materials. The influence of its size on critical refraction longitudinal wave evaluation stress

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