车轴横波聚焦探头的研制  

Study on Transverse Wave Testing of Rail Axle with Focusing Probe

作　　者：涂占宽[1] 黎连修[1] 程志义[2] 王伟[3] 

机构地区：[1]铁道科学研究院金属及化学研究所,北京100081 [2]长春轨道客车股份有限公司,长春130062 [3]南昌铁路局南昌客车段,南昌330013

出　　处：《无损检测》2007年第9期543-545,共3页Nondestructive Testing

基　　金：铁道部科技研究开发计划项目(2001J018)

摘　　要：利用几何声学原理,研究了在火车车轴圆周面上扫查时声波的传播规律,分析了声波的发散特性和聚焦条件,设计了5晶片聚焦探头,进行了探头性能测试和探伤试验。测试结果表明,5晶片聚焦探头聚焦效果明显,在探测深度为160mm时,其声场强度较等面积单晶片探头提高了5dB以上。The law of ultrasonic wave propagation was studied according to geometrical acoustics principle while scanning on rail axle convex surface. The divergence characteristics and focusing condition of ultrasonic wave in rail axle were analyzed. Five-crystal focusing probe was designed and the probe performances were experimented. Results indicated that the focusing effect of five-crystal probe was obvious and the wave amplitude was 5 dB more than the single-crystal probe with the same size at a testing depth of...

关 键 词：超声波探伤 火车车轴 横波探伤 聚焦探头研制 

分 类 号：TG115.285[金属学及工艺—物理冶金]