Ultrasonic wave residual stress test device

Abstract

An ultrasonic wave residual stress test device provided by the invention comprises an ultrasonic transducer set, a multichannel ultrasonic card, a signal processing board card and a control terminal. The ultrasonic transducer set includes a critical refraction longitudinal wave excitation probe and a critical refraction longitudinal wave reception probe, and also comprises a longitudinal wave flat probe capable of emitting ultrasonic wave longitudinal wave signals to a test area of a weldment to be tested and receiving longitudinal wave echo signals; the multichannel ultrasonic card includes an ultrasonic wave signal excitation module and an ultrasonic wave signal acquisition module; the signal processing board card includes a longitudinal wave attenuation degree calculation module, a database module and a residual stress calculation module; and the control terminal is configured to perform instruction control of each module in the multichannel ultrasonic card and the signal processing board card. The ultrasonic wave residual stress test device is able to correct the influence of the microscopic organization differences of welding area, the heat effect area and the base material area of a weldment to be tested on an ultrasonic wave residual stress test, so that the ultrasonic wave test precision of the welded joint residual stress is substantially improved.

Description

technical field [0001] The invention relates to an ultrasonic residual stress testing device capable of correcting the influence of microstructure differences, and belongs to the field of non-destructive testing of welding residual stress. Background technique [0002] Welding is the most important connection method in industrial production. The quality of welding determines the quality of welding products. The damage of welded joints caused by excessive welding residual stress is the most important welding damage. The non-destructive testing of residual stress of welded joints plays a very important guiding role in optimizing the welding process in production practice. The non-destructive testing methods for residual stress mainly include neutron diffraction method, synchrotron radiation method, magnetic particle method, X-ray diffraction method and ultrasonic testing method. Among them, the neutron diffraction method and the synchrotron radiation method are expensive in e...

AI Technical Summary

Problems solved by technology

The influence of some large microstructure differences on the ultrasonic propagation velocity is even in the same order of magnitude as that of the welding residual stress on the ultrasonic propagation velocity, which seriously affects the test accuracy of the ultrasonic residual stress test method and limits the development of the ultrasonic residual stress test method.

Images