高速列车6N01铝合金型材激光-MIG复合焊研究  

Laser-MIG hybrid welding of 6N01 aluminum alloy profile for high-speed train

作　　者：方喜风 汪认 王小朋[2] 雷振[2] 李小宇[2] 王诗洋[2] 

机构地区：[1]南车青岛四方机车车辆有限公司,266111 [2]机械科学研究院 哈尔滨焊接研究所,150028

出　　处：《焊接》2015年第2期54-58,71-72,共5页Welding & Joining

基　　金：国家国际科技合作项目(20100DFR50770)

摘　　要：针对高速列车的单层地板和侧墙部件,分别采用MIG焊和激光-单丝MIG复合焊进行6N01铝合金型材试验研究,优化了复合热源焊接的坡口尺寸,对比分析了两种焊接方法的焊缝成形、焊接效率、接头力学性能及微观组织。试验结果表明,复合焊在焊接速度为3 m/min时仍可获得良好的焊缝成形,与MIG焊相比,复合焊接效率可提高3倍以上,抗拉强度提高9%左右。Aiming at the single floor and side wall parts of high- speed train,MIG welding and laser- MIG hybrid welding of 6N01 aluminum alloy profile were carried out,respectively.The groove size of the hybrid welding was optimized.The weld appearance,welding efficiency Joint mechanical properties and microstructure were analyzed and compared between two methods.Results showed that hybrid welding can achieve good weld appearance at welding speed of 3m/min.Compared with MIG welding,the hybrid welding efficiency can be increased by more than3 times,and tensile strength increase by 9%or so.

关 键 词：高速列车 6N01 铝合金 激光 复合热源 

分 类 号：TG456.7[金属学及工艺—焊接]