超声探伤中,缺陷的定量定位是根据反射波在示波屏上显示的幅度和位置确定的。实际探伤中并非完全如此。由于声波在异质界面上的波型转换,常常出现伪缺陷信号,在缺陷的边缘产生“棱边峰值波”。本文简要地叙述了伪缺陷信号产生的原因、条件以及识别方法。阐明了利用棱边波测量片状缺陷尺寸的方法。 In ultrasonic flaw detection, the quantitative positioning of defects is determined by the amplitude and position of reflected waves on the oscilloscope screen. The actual flaw detection is not exactly the case. Due to the wave conversion of acoustic waves at the heterogeneous interface, false-defect signals often appear, resulting in “edge-peaked waves” at the edge of the defect. This article briefly describes the reasons for false signal generation, conditions and identification methods. Clarifying the method of measuring the flaw size by edge wave.