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.
出处
《焊接》
北大核心
2012年第11期52-55,71-72,共4页
Welding & Joining
关键词
5A06铝合金
变极性等离子
焊接工艺
拉伸性能
5A06 aluminium alloy
variable polarity plasma arc welding
welding technology
tensile strength
