单丝高熔敷率MAG焊接工艺的研究  

Research on high penetration MAG welding process with single wire

作　　者：殷树言[1] 陈树君[1] 华爱兵[1] 

机构地区：[1]北京工业大学机电学院,北京330063

出　　处：《电焊机》2009年第1期73-76,共4页Electric Welding Machine

基　　金：国家自然科学基金资助项目(NO50205001)

摘　　要：从提高焊接电流和电弧热熔化焊丝等效电压的角度出发,提出了两种新型的单丝高熔敷率MAG焊接工艺—细丝大电流MAG焊和直流正接MAG焊,并借助高速摄像手段分析了这两种焊接工艺的电弧行为、熔滴过渡机制以及焊缝成形特点。试验结果表明,通过选择合适的保护气体φ(Ar)98%+φ(O2)2%使得电弧烁亮区包覆了大部分液锥和全部的液流束且熔滴过渡基本在电弧烁亮区内部进行,可获得稳定的细丝大电流MAG焊;同样选择φ(Ar)98%+φ(O2)2%的保护气,能够获得电弧较为稳定、焊接飞溅较小、焊缝成形良好的直流正接MAG焊。On the basis of increasing welding current and voltage,two new types single wire high penetration MAG welding processes are introduced,these are fine wire high current MAG welding and DCEN MAG welding.The two welding processes are analyzed about welding arc process,metal transfer process and weld forming with high-speed film.The testing results show that selecting suitable shielding gas φ（Ar）98%＋φ（O2）2% can obtain steady fine wire high-current MAG welding and DCEN MAG welding.

关 键 词：高熔敷率 细丝大电流MAG焊 直流正接MAG焊 

分 类 号：TG444[金属学及工艺—焊接]