一、前言和背景在加拿大铁路工业和国营铁路中,超声波探伤作为一种主要的质量保证方法已有很长的历史了,第一台超声波试验设备是在1949年引进加拿大铁路的。当时有几家铁路工厂已装备了超声波探伤设备,但它一般只用来检验形状简单的零部件,对于形状复杂的传动轴和车轴则尽可能采用磁粉探伤。超声波探伤用在主动轴上受到限制的 I. Preface and Background In the Canadian railway industry and state-owned railways, ultrasonic flaw detection has a long history as a major quality assurance method. The first ultrasonic testing equipment was introduced to the Canadian Railways in 1949. At that time, several railway factories were equipped with ultrasonic flaw detection equipment, but it is generally only used to test the shape of simple components, for the shape of the shaft and the shaft are used as much as possible magnetic particle inspection. Ultrasonic flaw detection is used on the drive shaft is limited