2219 铝合金VPTIG 焊接接头拉伸性能分析

2219 铝合金气孔敏感性较强,变极性TIG 焊接工艺可以有效减少和抑制气孔产生,是适合于
2219 铝合金的焊接工艺。本文介绍了2219T62 铝合金VPTIG 焊接接头的拉伸性能,进行了拉伸断口形貌分析
和微观组织分析。结果表明:2219T62 铝合金VPTIG 焊接接头强度系数可以达到65% 以上,焊接接头为混合
断裂方式,VPTIG 焊缝盖面层气孔相比打底层较多。

Research on Tensile Properties of 2219 Aluminum Alloy VPTIG Welding Joint

2219 aluminum alloy is sensitive to the gas porosity. Variable polarity TIG arc welding technology can
independently adjust time and amplitude of positive and negative half period, therefore the VPTIG can be applied in
new launch vehicle. The tensile property of 2219 aluminum alloy VPTIG welding joint, tensile fractography analysis
and microstructure analysis are introduced in this paper. The results show that the strength factor of 2219 T62 aluminum
alloy VPTIG welding joint can reach 65%,the welding joint hybrid fracture and gas porosity of top layer more
than backing layer.