When we detect the internal defect of the welding seam quantificationally,we often adopt the half wave-height method,but the error is very large.Because of this,we take stand on an instance.

• 在此基础上,针对焊缝缺陷的定量检测时,常规采用半波高度法,其误差较大的情况,本文应用实例,应用端点衍射法对典型的焊接缺陷进行了超声波探伤。