本文通过宽板拉伸试验直接评定和研究了焊接接头中表面缺陷和埋藏缺陷对构件安全性的影响。试验结果表明,采用全面屈服准则评定局部贯穿缺陷是一种合理的和有效的方法,同时通过数据对比指出一些以COD参数为基础的评定方法的局限性。 研究表明,矩形局部贯穿缺陷总是先沿裂纹深度方向扩展,成贯穿裂纹,最后效失破坏。 In this paper, the influence of surface defects and burial defects on the safety of components is directly evaluated and studied by wide-plate tensile test. The test results show that it is a reasonable and effective method to assess the local through-defect using the comprehensive yield criterion. At the same time, some limitations of the evaluation methods based on the COD parameters are pointed out through data comparison. The research shows that the rectangular partially penetrated defects always extend along the depth of the crack first and then penetrate into the crack and finally lose the vandalism.