SUS301L不锈钢非熔透型激光搭接焊的疲劳特性分析  

Study on fatigue performance of stainless steel non-penetration laser lap welding of SUS301L stainless steel body

作　　者：朱国仁[1] 陈松[2] 李蒙蒙[2] 

机构地区：[1]吉林大学链传动研究所,长春130025 [2]吉林大学机械科学与工程学院,长春130025

出　　处：《焊接学报》2016年第4期14-18,129,共5页Transactions of The China Welding Institution

基　　金：科技部国际合作资助项目(2009DFR80040)

摘　　要：通过对轨道客车试验用不锈钢熔透型和非熔透型激光焊接头及电阻点焊接头不同的拉力和疲劳对比试验,疲劳试验采用阶梯法和成组法,并进行初步断裂力学和微观分析.结果表明,不锈钢车体非熔透型激光焊具有较熔透型激光焊和电阻点焊更高的疲劳强度,同时在相同激光焊接参数下,改变非熔透型激光焊工艺中非熔透板厚度,能直接影响其工艺的剪切拉伸强度和疲劳强度,加厚非熔透板,疲劳强度提高,剪切拉伸强度降低.With shear tension and fatigue strength tests on penetration and non-penetration stainless steel laser welding head and resistance welding head that are used in rail train tests and a preliminary analysis of the microstructure and fracture mechanics,which fatigue tests use the staircase method and group method.It can concludd that non-penetration laser welding stainless steel body has higher fatigue strength than penetration laser welding and resistance spot welding.And under the same laser welding parameters it could directly affect craft shear and fatigue strength when changing the non-penetration plate's thickness of the non-penetration laser welding craft.

关 键 词：熔透型激光焊 非熔透型激光焊 疲劳特性 剪切拉伸强度 

分 类 号：TG405[金属学及工艺—焊接]