在曲面周向横波探伤中,缺陷定位受到壁厚和曲率的影响,这种影响随着t/D的增大而增大。本文分别推导出t/D与常用探头的折射角的声程和弧长的修正系数K和m的关系,并进一步找出了用壁厚半值声程定位较准确地直接在示波屏上读出缺陷位置的方法。 In the surface transverse shear test, the defect location is affected by the wall thickness and curvature, and this effect increases with the increase of t / D. In this paper, we derive the relationship between the refraction angle of the t / D probe and the correction factor of the arc length K and m, respectively, and find out that using the semi-mean acoustic path of the wall thickness to locate directly and accurately on the oscilloscope Read out the location of the defect method.