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利用超声波在介质中的传播速度与其杨氏弹性模量的紧密联系,提出利用超声波批量检测球墨铸铁球化率的方法。通过任意波形发生器、示波器、压电晶片和计算机等设计了球墨铸铁球化率检测系统,通过LabVIEW软件编写程序,自动得到超声波传播速度和球墨铸铁球化率之间的关系。结果表明,与金相观察法得到的结果相比,检测准确率达到95%。
Utilizing the close relationship between the propagation velocity of ultrasonic wave in medium and Young’s modulus of elasticity, a method of batch testing the nodularity of nodular cast iron by ultrasonic wave is proposed. Through the arbitrary waveform generator, oscillograph, piezoelectric wafer and computer, we design the ductile iron spheroidization rate detection system. Through the programming of LabVIEW software, the relationship between the ultrasonic propagation speed and the spheroidization rate of ductile iron is obtained automatically. The results show that compared with the results obtained by metallographic observation, the detection accuracy reaches 95%.