用小孔法测量焊接残余应力时，在焊缝及其附近区域常出现测量值过高的现象。产生这种误差的原因主要是由小孔边缘发生塑性变形、超出弹性范围所致。采用了一种改进方法对焊接残余应力重新测试，使误差大为减小。 When the hole residual stress is measured by the pinhole method, the measured value is often too high in the weld and its vicinity. The main reason for this error is the plastic deformation of the edge of the hole, beyond the scope of flexibility. An improved method was adopted to re-test the welding residual stress, so that the error was greatly reduced.