5A06铝合金薄板VPPA焊接工艺研究  

VPPA welding technology of thin 5A06 aluminium alloy plate

作　　者：田志杰[1] 白景彬[1] 杜岩峰[1] 许春芳[1] 张蓬[1] 李小宇[2] 徐良[2] 

机构地区：[1]首都航天机械公司,北京市100076 [2]机械科学研究总院哈尔滨焊接研究所,150028

出　　处：《焊接》2012年第11期52-55,71-72,共4页Welding & Joining

摘　　要：通过对2.8 mm厚的5A06铝合金变极性等离子焊接穿孔工艺研究,获得了薄板铝合金VPPA优化的焊接工艺参数。焊缝外观成形良好,X射线无损检测表明,VPPA接头无气孔等缺陷。金相试验表明,焊缝区显微组织晶粒纤细,组织均匀。变极性等离子弧焊接头常温抗拉强度在370～375 MPa之间,断后伸长率平均值为9.7%,其接头强度系数接近达到98.7%,接头未出现软化,为等强匹配焊接接头。By studying the VPPA(variable polarity plasma arc) keyhole welding of 5A06 aluminium alloy plate of 2.8 mm in thickness,the optimized VPPA welding parameters were obtained.The weld has good appearance and X - ray NDT indicated there are not pores in weld.Microstructure in weld is uniform.The tensile strength of the joint at room temperature can reach 370～375 MPa,and the average elongation is 9. 7%,and the strength coefficient can reach 0.987,and the equal strength matched welded joint can be obtained.

关 键 词：5A06铝合金 变极性等离子 焊接工艺 拉伸性能 

分 类 号：TG456.2[金属学及工艺—焊接]