基于纯氩保护气体的304不锈钢激光-CMT电弧复合热源焊接试验研究  

Laser-CMT hybrid welding with argon as shielding gas for 304 stainless steel

作　　者：雷振[1] 王旭友[1] 王威[1] 林尚扬[1] 

机构地区：[1]机械科学研究院哈尔滨焊接研究所,150080

出　　处：《焊接》2010年第8期18-22,共5页Welding & Joining

摘　　要：利用高速摄像分别采集了纯Ar保护气氛下激光与CMT电弧复合前后的CMT电弧形貌。研究了在采用纯Ar保护气体焊接304不锈钢时的激光-CMT电弧复合热源焊接过程稳定性、焊缝成形、焊接效率、焊接接头的力学性能及组织特点,并将试验结果与304不锈钢TIG填丝焊进行对比。分析结果表明,纯Ar保护的激光-CMT复合热源焊接接头的综合力学性能与TIG填丝焊接头的综合力学性能具有相当的水平,但焊接效率可以提高5倍,因此在不锈钢、镍基合金等高性能金属材料的焊接中,用纯Ar保护的激光-CMT电弧复合热源焊接取代TIG填丝焊具有可行性。The high-speed photo for CMT arc under argon atmosphere of both CMT welding and laser-CMT hybrid welding were achieved by using a high-speed photography system. And 304 stainless steel was welded with TIG welding with filler wire and laser-CMT hybrid welding with argon as shielding gas, respectively. During the laser - CMT hybrid welding process, the CMT arc stability, the weld appearance, the welding efficiency and the mechanical properties and mierostrueture of joints were analyzed. The results indicated that the mechanical properties of the joints were as good as those of TIG welding with filler wire, however the welding efficiency of laser-CMT hybrid welding was 5 times higher than that of TIG welding with filler wire. So it is possible that laser-CMT hybrid welding with argon as shielding gas can replace TIG welding with filler wire to weld stainless steel and nickel base alloy.

关 键 词：激光 CMT电弧 复合热源焊接 304不锈钢 纯氩保护气体 

分 类 号：TG457[金属学及工艺—焊接]