在对大曲率工件超声波探伤中,因为曲率的存在,仪器的缺陷显示深度和缺陷实际深度往往有很大的误差。深度修正通常采用相对复杂的计算法,既影响工作效率又容易在计算中产生错误。通过对经典深度修正公式的推导,将这种计算转化为图表曲线的形式,既直观又简捷,从而实现在探伤过程中对实际深度的快速修正。 In the ultrasonic testing of large curvature of the workpiece, because of the existence of curvature, the depth of the instrument defects and the actual depth of defects often have great errors. Depth correction usually adopts a relatively complicated calculation method, which not only affects work efficiency but also easily generates errors in calculation. Through the derivation of the classical depth correction formula, this calculation is transformed into the form of chart curve, which is both intuitive and simple, so as to realize the rapid correction of the actual depth in the flaw detection process.