激光对7N01铝合金复合焊焊接接头组织性能的影响  

Effect of Laser on Microstructure and Properties of Welded Joints of 7N01 Al Alloy by Hybrid Welding

作　　者：张世欣[1] 苗海宾 张振亚[1] 王高飞[2] 孟立春[1] 何秀丽[2] 张占岭[1] 李世涛[1] 虞钢[2] 

机构地区：[1]南车青岛四方机车车辆股份有限公司,山东青岛266111 [2]中国科学院力学研究所先进制造工艺力学实验室,北京100190

出　　处：《热加工工艺》2014年第21期43-46,共4页Hot Working Technology

摘　　要：采用激光-MIG复合焊的方法,对高铁用7N01铝合金进行了焊接工艺试验,对复合焊过程中激光的作用进行了研究。给出了激光对焊缝成形的改善效果,测定并分析了接头的硬度分布,讨论了激光的加入对接头微观组织的影响。试验表明:激光的加入能够抑制驼峰,可以增大熔深,并且在文中所给参数下,不会对热影响区造成显著影响。本文最后探讨了激光-MIG复合焊过程中,激光作用的机理。7N01 aluminium alloy using in high-speed vehicles was welded by laser-MIG hybrid welding. The effects of laser on the welding process was investigated. The alterations of weld formation were provided after the input of laser. The microhardness distribution of the weld joints was measured. The influence of the input of laser on the microstructure of the welded joints was discussed. The results show that hump is suppressed and the penetration improves with the adding of laser. There is no significant influence on HAZ under parameters given in the article. Finally, the mechanism of the effect of laser during hybrid welding process was discussed.

关 键 词：7N01铝合金 复合焊 激光作用 

分 类 号：TG456.7[金属学及工艺—焊接]