熔渗CuW材料的超声无损探伤研究

以CuW材料为例，研究其组织中缺陷的超声无损探伤方法。在分析了CuW材料的组织及缺陷特点后，认为多次反射法比较适合，据此对探头频率、对比试块的结构、探伤灵敏度等参数和评价方法进行了研究。结果表明：探头型号5p10的检测效果最好，最佳的检测灵敏度为厚度10mm三次底波至满屏80％高度时对应的灵敏度，对不同牌号的CuW材料可以通过调整检测灵敏度，参照同一标准进行评价。

Investigation on the ultrasonic nondestructive test of infiltrated W-Cu alloy by multiple echo method

Based on analysis of the microstructures and micro-defects of W-Cu alloy prepared by sintering and infiltration process, a multiple echo method have been carried out to do ultrasonic examination for W-Cu alloy. The results show that the demodulator (probe) with a frequency of 5MHz and a diameter of 10mm has the best test results. The sensibility of the ultrasonic examination machine should be set at where the third echo wave reaches 80% of full scale for a 10mm thick standard test sample. As for W-Cu alloy with different tungsten contents, the same standard can be used through adjusting sensibility of the ultrasonic examination machine.