高速列车6005A铝合金型材焊接接头疲劳性能  

Fatigue properties of 6005A aluminum alloy welded joints for high-speed train

作　　者：雷振[1] 张健[1] 李长义[1] 许鸿吉[2] 杨大龙[2] 

机构地区：[1]机械科学研究院 哈尔滨焊接研究所,150028 [2]大连交通大学 材料科学与工程学院,116028

出　　处：《焊接》2013年第4期18-21,69-70,共4页Welding & Joining

基　　金：国际科技合作基金资助项目(2009DFR50170);高档数控机床与基础制造装备科技重大专项(20112X04016-061)

摘　　要：采用脉动拉伸试验方法分别测试了指定寿命为1×10^7次循环下6005A铝合金母材、双丝MIG焊对接接头及激光-双丝MIG复合焊对接接头的疲劳性能。疲劳测试结果表明，在该试验条件下，6005A铝合金母材的疲劳强度为100MPa，与铝合金母材相比，焊接接头的疲劳性能略有降低，双丝MIG焊接头的疲劳强度约为86MPa，激光-双丝MIG复合焊接头的疲劳强度约为91MPa，激光-双丝MIG复合焊对接接头的疲劳性能优于双丝MIG焊对接接头的疲劳性能。Fatigue properties of 6005A aluminum alloy base material and joints welded by tandem MIG(metal inert-gas) welding and lasertandem MIG hybrid welding were tested with pulsed tensile fatigue method in the condition of 1×10~7 lifetime,respectively.The test results demonstrated that the fatigue strength of the joints was a little lower than that of 6005A base material which can be up to 100 MPa.But the fatigue strength of hybrid welding joints was 91 MPa,which was slightly higher than 86 MPa of tandem MIG welded joints.

关 键 词：高速列车 6005A铝合金 激光 复合焊 疲劳性能 

分 类 号：TG456.7[金属学及工艺—焊接]