由于焊接过程是一种不均匀的加热和冷却过程,使焊件各部分热胀冷缩不一致,还会造成焊件不均匀的组织和性能,使其结构内部产生复杂的残余应力,外部则以焊接变形表现出来。我们在实践中体会到,要对具体情况作具体分析,针对本单位的具体情况和图纸对构件的要求,灵 As the welding process is a non-uniform heating and cooling process, so that each part of the weldment thermal expansion and contraction inconsistent, will result in uneven weldment organization and performance, so that the internal structure of complex residual stress, the external Welding deformation shown. We experience in practice, to make a specific analysis of the specific circumstances, in view of the specific circumstances of the unit and drawings on the components of the request, the spirit