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用盲孔法测量焊接残余应力时，由高应力区的孔边应力集中引起的塑性变形是影响测量精度的主要因素。通过对20g钢进行非常规的超载拉伸标定试验，得到一条误差曲线，进而由该曲线回归得到一个经验公式。试验证明，用该公式对用盲孔法测得的20g钢焊件的残余应力误差进行修正，能取得满意的效果。
When measuring the welding residual stress by the blind hole method, the plastic deformation caused by the stress concentration at the hole edge of the high stress area is the main factor affecting the measurement accuracy. By 20g steel unconventional overloading tensile calibration test, get an error curve, and then from the curve regression to an empirical formula. Experiments show that using this formula to correct the residual stress error of 20g steel weldment measured by the blind hole method can achieve satisfactory results.