钢焊缝超声波探伤时,由于工作原理的特点,回波讯号的参数有时易导致伪缺欠真判定的现象。本文结合工作实例,对中厚板对接焊缝的超声波探伤过程中,出现的伪缺欠回波进行探伤试验并加以分析,阐明此类伪缺欠产生的原因和特点,以提高焊缝探伤时缺欠的判定准确性,供大家借鉴。 Ultrasonic testing of steel welds, due to the characteristics of the working principle, the parameters of the echo signal can sometimes easily lead to pseudo-lack of true judgment phenomenon. In this paper, working examples are given to test and analyze the false negative echoes in the process of ultrasonic flaw detection of butt welds on plate, and to clarify the causes and characteristics of such false defects to improve the defects Judge the accuracy for your reference.