激光的加入对激光-MIG复合焊熔滴过渡的影响研究  

Effect of laser on metal transfer behavior of laser-MIG hybrid welding

作　　者：王秋影 邱培现 陈辉[2] WANG Qiuying;QIU Peixian;CHEN Hui(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China;School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《电焊机》2020年第3期126-130,I0008,I0009,共7页Electric Welding Machine

摘　　要：对比研究3 kW激光的加入对铝合金MIG焊熔滴过渡和过程稳定性的影响,结果表明,激光的加入使焊接过程更稳定。小电弧参数时,在等离子流力、电磁收缩力和激光匙孔金属蒸汽反冲力的共同作用下,激光-MIG复合焊熔滴落点更靠近焊丝;大电弧参数时,等离子流力和电磁收缩力起主要作用,激光匙孔金属蒸汽反冲力的作用可以忽略不计,激光加入前后熔滴均沿焊丝延长线落入熔池。Effect of laser on metal transfer and welding process stability were studied. The results show that laser-MIG hybrid welding process was more stable than MIG. When wire feeding speed were low,electromagnetic force,plasma drag force and recoil force induce by the metallic vapor from the keyhole of laser were the keys to affect the droplet behavior.The landing location of droplet in laser-MIG hybrid welding was closer to the welding filler wire due to the effect of the recoil force induce by the metallic vapor from the keyhole of laser. When wire feeding speed was high,electromagnetic force and plasma drag force were the keys to affect the droplet behavior. The droplet behavior of laser-MIG hybrid welding and MIG welding had no significant differences.

关 键 词：MIG焊 激光-MIG复合焊 熔滴过渡 

分 类 号：TG456.7[金属学及工艺—焊接]