对发电站碳钢和珠光体钢的焊缝检测,超声波检测法应用广泛。而奥氏体接头的熔敷金属和热影响区会引起较强虚假缺陷回波,使传统超声波探伤方法难以对其进行检测,依靠目规及表面检查只能检测部件表面缺陷,射线探伤难以检测危险的平面缺陷。此外,有资料表明,现役电站设备中奥氏体钢焊缝和其他种类焊缝中的临界缺陷皆会引起 Weld test of carbon steel and pearlite steel in power station is widely used in ultrasonic testing. The austenitic joint deposited metal and heat affected zone will cause strong false defect echo, so that traditional ultrasonic testing method is difficult to detect, rely on rules and surface inspection can only detect the surface defects, ray inspection is difficult to detect Dangerous plane defects. In addition, data indicate that critical defects in austenitic steel welds and other types of welds in active power plant equipment can all cause