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在现代焊接工艺中经常会存在各种缺陷,这些缺陷会影响工件的正常使用,却又难以通过观察去发现,超声时差衍射法为解决此类问题提供了一种方案,将TOFD用于工件探伤上,通过脉冲信号的传播时间进行缺陷定位及定量,目前在核工业、电力、石油系统,特种设备行业的应用和研究正蓬勃发展。
In the modern welding process often there are various defects, these defects will affect the normal use of the workpiece, but difficult to find by observation, ultrasonic time-of-flight diffraction method to solve such problems provides a solution to the application of TOFD workpiece inspection , The localization and quantification of defects are based on the propagation time of the pulse signal. At present, the application and research in the nuclear industry, electric power, petroleum systems and special equipment industries are booming.