摘要
在焊接过程中,强烈的局部加热和随后的快速冷却在焊件中造成了很大的温度梯度,不可避免地产生了一定程度的残余应力和变形而降低焊缝的力学性能。优化焊接顺序是降低焊接残余应力的一种简单易行、成本低且行之有效的方法。系统地对焊接顺序在焊接残余应力中的影响进行了综述,并运用其机理对不同焊接结构进行了分类评述,得出判定单条焊缝、多道焊、多层焊和具有多条焊缝的焊接结构的最佳焊接顺序的方法,对生产实际具有重要的指导意义。
In the welding process,the intensive local heating and subsequent rapid cooling result in sharp temperature gradient,which inevitably produces a certain degree of residual stress and deformation,and reduce mechanical properties of the weld.Optimization of welding sequence is a simple,low cost and effective method to reduce the welding residual stress.The influence of welding sequence on welding residual stresses was systematically summarized.According to its mechanism,the different welding structures were evaluated.A method to judge an available welding sequence for single-pass welding,multi-pass welding,multi-layer welding and the welding structure with several weld was obtained,which has a great guiding significance for practical production.
出处
《焊接》
北大核心
2011年第12期12-14,70,共3页
Welding & Joining
关键词
残余应力
焊接顺序
刚性约束
迭加
变形
residual stress
welding sequence
rigid constraints
superposition
deformation
