搅拌摩擦焊和钨极氩弧焊焊接接头的残余应力  

Residual Stress of Friction Stir and TIG Welds

作　　者：王训宏[1] 王快社[1] 沈洋[1] 徐可为[2] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西安交通大学金属材料强度国家重点实验室,陕西西安710049

出　　处：《机械工程材料》2007年第1期26-28,共3页Materials For Mechanical Engineering

基　　金：陕西省科技计划资助项目(2003K07-G8)

摘　　要：利用X射线衍射法测量了铝合金搅拌摩擦焊和钨极氩弧焊（TIG）焊接接头表面的残余应力分布。结果表明：两种接头在焊缝区及其周围的残余应力存在着明显的变化,在平行于焊缝方向,应力呈“W”型的分布,焊缝外残余应力值迅速下降;钨极氩弧焊焊接接头残余应力的最大值位于热影响区;在热影响区,搅拌摩擦焊接接头残余应力平均值比TIG焊接接头的约低15%-25%。X ray diffraction method was used to determine distribution of the surface residual stress in the joints by friction stir welding and tungsten inert gas welding for aluminum alloys. There exist obvious stress variation in two kinds of welds. Distribution of residual stresses in longitudinal direction show W shape. The residual stress droped rapidly outside the friction stir weld. The maximum tensile residual stress exist in the heat affected zone （HAZ）. Compared to that of TIG welds in HAZ, the residual stress values of friction stir welds is lower by about 15%-25%.

关 键 词：搅拌摩擦焊 钨极氩弧焊 残余应力 

分 类 号：TG453.9[金属学及工艺—焊接]