铝锂合金YAG-MIG复合焊焊缝成形特征  

Characteristics of aluminium-lithium alloy joint formed by YAG-MIG hybrid welding

作　　者：杨璟[1,2] 李晓延[1] 巩水利[2] 陈俐[2] 许飞[1,2] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]北京航空制造工程研究所高能束流加工技术重点实验室,北京100024

出　　处：《焊接学报》2010年第2期83-86,共4页Transactions of The China Welding Institution

基　　金：武器装备重点基金资助项目(9140A18030708HK5501)

摘　　要：基于铝锂合金激光电弧复合焊焊缝成形特征的分析,对5A90铝锂合金YAG-MIG复合焊接工艺展开研究.固定选取合理的焊接位置条件下,讨论了激光功率、焊接速度、焊接电流和热源作用间距等主要焊接工艺参数对焊缝成形的影响规律.结果表明,两热源间距在0～6mm之间时有较好的复合效应;激光功率的增加对增大焊缝熔深和背面熔宽起主导作用;焊缝正、背面熔宽随着焊接速度的提高均明显减小,熔深亦有减小趋势;焊接电流加大时,焊缝熔深和熔宽显著增大.The process of YAG laser and MIG-arc hybrid welding for 5A90 aluminium-lithium alloy was investigated based on analysing the characteristics of joint formation in laser-arc hybrid welding. Under the condition of the constant welding position, the effect of main welding parameters on the joint formation, including laser power, travel speed, welding current and the distance between hybrid thermal sources, was discussed. The results indicate that a good synergistic effect is shown if the distance between laser and arc is within 0-6 mm. The laser power plays a main role in increasing of depth and backside width of weld. With the increase of welding speed, the width of the weld decreases rapidly, so dos the penetration. But the depth and width of the weld increase obviously with the promotion of welding current.

关 键 词：铝锂合金 激光电弧复合焊接 焊缝成形 

分 类 号：TG456.7[金属学及工艺—焊接]