熔渗CuW材料的超声无损探伤研究  

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

作　　者：淡新国[1] 范志康[1] 梁淑华[1] 肖鹏[1] 邹军涛[1] 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048

出　　处：《粉末冶金技术》2005年第3期181-184,共4页Powder Metallurgy Technology

基　　金：陕西省自然科学基金(2000C30);陕西省教育厅重点基金(99JK171)资助项目

摘　　要：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。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 5 MHz and a diameter of 10 mm 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 10 mm 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.

关 键 词：CUW 超声 检测灵敏度 熔渗 无损探伤方法 材料的组织 探伤灵敏度 对比试块 评价方法 检测效果 反射法 等参数 缺陷 探头 牌号 

分 类 号：TG441.7[金属学及工艺—焊接] TM503.5[电气工程—电器]