Nondestructive Characterization of Nodularity of Centrifugal Spheroidal Graphite Iron Pipe by Ultrasonic Transverse Wave Velocity
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摘要: 在离心球铁管球化率的超声无损检测中，由于管形铸件的形状特殊，在声路设置和声程确定方面存在很大困难。利用专门设计的探头架，采用横波声速测量方法，克服了管壁厚度对声速检测的影响。测试得到的离心球铁管横波声速与球化率呈线性关系，满足理论分析结果。Abstract: In the process of ultrasonic testing of centrifugal spheroidal graphite iron pipe nodularity,as the special shape of the pipe, it was very difficult to set the sound travel and the sound path. Transverse wave velocity method was designed with the special probe device to overcome the influence of the pipe thickness to the tested velocity. According to the tested transverse wave velocity in the centrifugal spheroidal graphite iron pipe,the linear relationship between the nodularity and the ultrasonic transversal wave velocity was obtained at room temperature. The testing results well met with the theoretical analysis.
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