M弧电流对Tri-Arc双丝电弧焊熔滴过渡形态影响  

Effects of M Arc current on Tri-Arc double wire welding droplet transfer modes

作　　者：马振[1] 庄明辉[1] 牟立婷 李少农 耿正[3] 李慕勤[1] 

机构地区：[1]佳木斯大学材料科学与工程学院,佳木斯154007 [2]深圳瑞凌实业股份有限公司,深圳163000 [3]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001

出　　处：《焊接学报》2017年第11期57-60,共4页Transactions of The China Welding Institution

基　　金：黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2016203);佳木斯大学与深圳瑞凌实业股份有限公司合作项目(RI-YF-15012701)

摘　　要：采用高速摄影技术对三电弧双丝电弧焊的熔滴过渡和焊接飞溅进行观察,分析金属型药芯焊丝在M弧电流变化时熔滴过渡的类型及飞溅产生的原因.结果表明,M弧电流为170 A时熔滴过渡形式有排斥过渡、颗粒过渡及细颗粒过渡,熔滴过渡不稳定.M弧电流为210 A时前丝和后丝熔滴过渡为大熔滴排斥过渡,三电弧同时出现,熔滴过渡稳定.M弧电流为260 A时前丝熔滴过渡为细颗粒过渡,后丝熔滴过渡为颗粒过渡,熔滴过渡较稳定.焊接飞溅产生的原因主要是脉冲切换改变了电弧力、斑点力及等离子流力,打破了原来的力系平衡.Drop transition and splash of Metal flux-cored Tri-Arc double wire welding arc in the changes of the M Arc current are studied by high speed photography technology. The results show that the droplet transfer mode of the front wire and the back wire was Rejection transfer,globular transfer and small drop transfer,When the M Arc current was 170 A,the droplet transfer mode of the front wire and the back wire was big and the droplet Rejection transfer when the M Arc current was 210 A.The droplet transfer mode of the front wire was small drop transfer and that of the back wire was globular transfer when the M Arc current was 260 A. The changes of M arc current greatly affect on the droplet transition. When the current reaches a critical value,three arcs appear at the same time. When the arc force,spots and plasma power were changed by pulse switch,breaking the balance between the original force systems,the droplet transition and welding spatter had a certain impact.

关 键 词：三电弧双丝电弧焊 熔滴过渡 焊接飞溅 高速摄影 

分 类 号：TG422.3[金属学及工艺—焊接]