双脉冲MIG焊对2219Al-Cu合金焊缝组织及性能的影响  

Effects of the Synergic-Pulsed MIG Welding on the Microstructure and Properties of 2219 Al-Cu Alloy Welds

作　　者：徐强[1] 国旭明[1] 王宗杰[2] 杨成刚[1] 

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016 [2]沈阳工业大学材料科学与工程学院,辽宁沈阳110023

出　　处：《热加工工艺》2004年第10期3-5,共3页Hot Working Technology

基　　金：国家"863"计划资助项目(2002AA305402)

摘　　要：研究了双脉冲MIG焊工艺对2219高强铝铜合金焊缝组织及性能的影响,通过正交试验确定了适合于2219铝铜合金焊接的最佳脉冲MIG焊工艺参数。实验结果表明,采用上述工艺参数焊接,焊缝金属中得到了大量细小的等轴晶组织,柱状晶的数量明显减少,提高了焊缝金属的力学性能。The effects of the synergic-pulsed MIG process on the microstructure and properties of 2219 Al-Cu alloy welds were investigated.The optimum synergic-pulsed MIG process parameters were established through the orthogonal experiment.The results show that a large amount of the fine equiaxed grain structures in weld metals are obtained when welding was carried out using above parameters and the amounts of columnar grains are reduced obviously.The mechanical properties of the weld metals are improved.

关 键 词：高强Al-Cu合金 双脉冲MIG焊 焊缝组织 

分 类 号：TG457.14[金属学及工艺—焊接] TG444.7