Rapid detection method for stress concentration of heat-treated workpiece

Abstract

The invention discloses a rapid detection method for stress concentration of a heat-treated workpiece, which comprises the following steps as follows: (1) carrying out heat treatment on the workpiece to be tested; (2) carrying out demagnetization treatment on the heat-treated workpiece; (3) carrying out self-emission magnetic signal measurement on the treated heat-treated workpiece; (4) calculating the measurement result, if the self-emission magnetic signal numerical value on certain test points of the workpiece are apparently higher than the average value, determining the stress concentration position according to the test points; and (5) judging and marking the stress concentration position and stress on the workpiece according to the test result. According to the invention, the stress concentration position and stress of the heat-treated workpiece can be rapidly measured, the operation is convenient and simple, and the result is easy to judge.

Description

Technical field [0001] The present invention involves a fast detection method, especially a fast detection method that involves a heat -processing workpiece stress concentration. Background technique [0002] Stress concentration refers to the phenomenon of significant increase in stress within the local range caused by external factors or self -geometric shapes and shape dimensions.Stress concentration will cause material breaks; cause the workpiece to cause fatigue cracks, so it is necessary to detect the stress concentration of the workpiece in engineering design. [0003] At present, the stress concentration mainly uses the residual stress tester for measurement, but the method of this method is inconvenient and the speed is slow, resulting in the limitation of its use of industrial producers.For thermal treatment workpiece, few people are currently testing their stress concentration, mainly because there is no mature testing method at present, and the method of detecting co...

AI Technical Summary

Problems solved by technology

[0003]At present, stress concentration is mainly measured by residual stress tester, but this method is inconvenient and slow, which limits its use in industrial producers

For heat-treated workpieces, few people test their stress concentration at present, mainly because there is no mature testing method at present, and the method of detecting conventional defects cannot determine the location and degree of stress concentration, but stress concentration will induce fatigue crack growth This leads to the failure of the workpiece, which brings huge losses to industrial production and people's lives and property.

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