2A14高强铝合金电子束焊接工艺优化及接头组织分析  

Optimization of parameters and joint microstructure of electrode beam welding of 2A14 Al alloy

作　　者：王亚荣[1] 黄文荣[1] 莫仲海[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,绵阳621900

出　　处：《焊接学报》2011年第12期93-96,100,共5页Transactions of The China Welding Institution

摘　　要：通过正交试验和分析的方法研究了电子束焊接中主要工艺参数:电子束流、焊接速度、焦点位置、扫描图形、图形尺寸以及扫描频率对焊接接头熔深和熔宽的影响规律.结果表明,电子束流和焦点位置对接头熔深和熔宽的影响最为显著,其次为焊接速度,而束流扫描参数,如图形、尺寸和频率对熔深的影响相对较小.利用优化的电子束参数组合焊接得到成形和质量良好的接头.焊缝内部分布着均匀细小的枝晶结构,其组织为先共晶α-Al固溶体和非平衡的共晶组织.Experimental investigations on the electron beam welding of aluminum alloy 2A14 are presented in this paper.Experiments are carried out to study the influence of welding parameters,such as beam current,welding speed,focal location,scanning graph,graph size and scanning frequency,on the penetration depth and width of welds based on an orthogonal test and analysis method.The results showed beam current and focal location had the greatest effect on penetration depth and width of welds,welding speed was next,and beam scanning parameters,such as figures,size and frequency,relatively affected much less.The joints welded by the optimum parameters are good appearance and quality.The microstructure of weld zone is composed ofαphase and eutectic structure grains.

关 键 词：电子束焊接 2A14铝合金 正交试验设计与分析 微观组织 

分 类 号：TG456.3[金属学及工艺—焊接]