Correction method of influence of pore diameter on evaluating stress of metal materials through critical refraction longitudinal waves
A critical refraction, metal material technology, applied in the direction of measuring force, force/torque/work meter, measuring device, etc.
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[0036] figure 1 It is a schematic diagram of the connection relationship of the critical refraction longitudinal wave evaluation stress system of the present invention, referring to figure 1 As shown, the ultrasonic pulse transmitter receiver, data acquisition equipment, digital oscilloscope, and analysis system are connected in sequence.
[0037] Taking Q235 steel in the hot-rolled state as an example, the correction method for evaluating the stress of metal materials affected by the critical refraction longitudinal wave by the pore diameter is described. The correction formula (the function between the critical refraction longitudinal wave acoustoelastic coefficient and the diameter of the blind hole) is obtained as follows:
[0038] Step 1. Taking the hot-rolled Q235 steel with a thickness of 6.0mm as the research object, adjust the excitation parameters of the ultrasonic pulse transmitter and receiver 5072PR, select the single-probe excitation mode, and use the edge reflec...
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