CO2气体保护焊熔滴过渡与飞溅的关系  

Relationship between droplet transfer and spatter in CO2 arc welding

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

出　　处：《电焊机》2020年第2期6-13,I0003,共9页Electric Welding Machine

摘　　要：探讨了CO2气体保护焊熔滴过渡与飞溅的关系。结果表明,存在三种熔滴过渡形态:滴状过渡、短路过渡和混合过渡形态。三种过渡形态的焊接飞溅形式各异,飞溅产生机理以熔滴内部爆炸和液桥爆炸为主因,影响因素中焊丝成分及电流、电压、极性仍是关键因素。熔滴过渡形态与飞溅关系的内在联系是熔滴的非轴向性、熔滴尺寸,以及熔滴中的气体含量,三个参数数值高时焊接飞溅大,反之飞溅小。工程上多种控制熔滴过渡形态与飞溅关系的方案各具特色,其中应用最好的首推CMT工艺,已经为众多企业赢得可观的经济效益。The relationships between droplet transfer and spatter in CO2 arc welding were discussed.The results show that there are three kinds of droplet transfer modes:globular transfer,short circuiting transfer and mixed transfer mode.The welding spatter types of the three transfer forms are different.The spattering mechanism is mainly caused by the internal explosion of droplets and the liquid bridge explosion.Among the influencing factors,wire composition,welding current,arc voltage and power polarity are still the key factors.Internal connections of relationship between droplet transfer forms and spatter are the non-axiality of droplets,droplet size and gas content in droplets.When the values of three parameters are high,the welding spatter is large,otherwise the welding spatter is small.In engineering,there are various schemes to control the relationship between droplet transfer form and spatter,among which CMT process is the best one,which has gained considerable economic benefits for many enterprises.

关 键 词：焊接飞溅 熔滴过渡 实心焊丝 CO2气体保护焊 

分 类 号：TG444[金属学及工艺—焊接] TG403