厚板常用弧焊工艺的技术和经济特性比较

Comparison of technical and economic characteristics of common arc welding process for heavy plate

对厚板结构常用的焊条电弧焊、埋弧焊与窄间隙埋弧焊、传统气体保护焊、窄间隙气体保护焊工艺方法,进行焊接坡口填充面积、焊接生产率、焊接热输入量、焊态焊接接头组织和性能、焊接残余应力和综合焊接生产成本方面的分析和比较。上述工艺方法中,窄间隙气体保护焊具有更高的焊接生产率,焊态接头的承载能力更高,焊接残余应力更低,焊接生产成本大幅度降低40%~80%。

SMAW,SAW,NG-SAW,GMAW and NG-GMAW are applied often in structures with thick plates. In this article,we investigated and compared the filling area in groove ,heat input,welding parameters, mechanical properties of weld ,residual strain and production cost for those welding technologies. Finally,we came to a conclusion that NG-GMAW involves higher productivity,higher strength of welding joint,lower residual strain and over 40%-80% substantial reduction in cost.