利用拉伸试验方法研究了应变强化对圆形及条形焊接缺陷的影响,试验分析了不同的应变量、不同方向的应变强化、不同厚度的试样对圆形及条形缺陷的影响。结果表明:直径小于Ф2.5mm的圆形缺陷经3%、6%、9%应变强化后,缺陷增长率小于25%;薄板对圆形缺陷的影响大于较厚板对圆形缺陷的影响;横向拉伸大于纵向拉伸对圆形缺陷的影响。 The effects of strain hardening on circular and strip welding defects were studied by tensile test. The effects of different strain amount, strain hardening in different directions and samples with different thickness on circular and strip defects were analyzed. The results show that the growth rate of defects is less than 25% after 3%, 6%, 9% strain hardening of circular defects with diameter less than 2.5 mm. The influence of the plate on the circular defects is greater than that of the thick plates. The transverse stretch is greater than the effect of longitudinal stretch on the circular defect.