面向工程应用的BA-GMAW熔滴过渡形态  

Engineering application oriented droplet transfer mode of buried arc GMAW

作　　者：孙咸[1] Sun Xian(Institute of Welding Consumables,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学,焊接材料研究所,太原030024

出　　处：《焊接》2022年第2期46-55,共10页Welding & Joining

摘　　要：综述了涉及工程应用的潜弧熔化极气体保护焊(Buried arc gas metal arc welding,BA-GMAW)熔滴过渡形态特征。结果表明,在大电流和相应的焊接参数下,BA-GMAW工艺的熔滴过渡形态有3种,即呈滴状过渡、摆动过渡和旋转过渡。BA-GMAW电弧空腔中电弧形态属于连续、敞开、非活动型;电弧空腔内氛围发生了质的变化,电弧爬升到熔滴上方,满足了喷射过渡形成3要素。焊接工艺参数对BA-GMAW熔滴过渡形态的影响,主要是焊接电流和电弧电压的影响;前者主要改变熔滴上作用力方向和大小,后者涉及潜弧的稳定性。潜弧焊熔滴过渡形态与工艺质量的利好关系,是受稳弧技术控制的熔滴过渡特性改善所决定的。The characteristics of droplet transfer mode in buried arc gas metal arc welding( BA-GMAW) involving engineering applications were reviewed. The results showed that under high current and corresponding welding parameters,there were three droplet transfer modes in BA-GMAW process,namely drop transfer,swinging transfer and rotating transfer. The arc shape in BA-GMAW arc cavity was continuous,open and inactive;the atmosphere in the arc cavity changed qualitatively,and the arc climbed above the droplet,meeting the three factors of spray transfer formation. The influences of welding parameters on the droplet transfer modes of BA-GMAW were mainly the ones of welding current and arc voltage,the former mainly changed the direction and magnitude of the force on the droplet,while the latter involved the stability of the buried arc. The favorable relationship between droplet transfer mode and process quality in buried arc welding was determined by the improvement of droplet transfer characteristics controlled by arc stabilization technology.

关 键 词：熔滴过渡 潜弧熔化极气体保护焊 旋转过渡 金属蒸气 电弧稳定性 

分 类 号：TG403[金属学及工艺—焊接]