采用全面屈服准则通过实验直接研究和评定了室温下焊缝匹配、应变时效和热处理对焊接构件强度的影响。试验结果表明,对于A131钢和A537钢来说,高匹配焊缝金属增加得到全面屈服的可能性,这意味着针对母材适当地选择焊缝金属可得到较大的焊缝允许缺陷或极限裂纹尺寸a_(cr)值。同时因为一些因素,象应变时效和热处理能改变焊缝匹配程度,因而它们也将影响焊缝的a_(cr)值。 Using the comprehensive yield criterion, the influence of weld matching, strain aging and heat treatment on the strength of welded components at room temperature was directly studied and evaluated through experiments. Test results show that for A131 and A537 steels, the increase in the yield of the high-matching weld metal gives the possibility of full yielding, meaning that a large weld allowable defect or ultimate crack can be obtained by proper selection of the weld metal for the base metal Size a_ (cr) value. At the same time, because of factors such as strain aging and heat treatment, which can alter weld matching, they also affect the weld a_ (cr) value.