超声-MAG复合焊接的熔滴过渡行为  

Characteristics of droplet transfer during ultrasound-MAG hybrid welding

作　　者：范成磊[1] 姚庆泰 谢伟峰[1] 庄小威 杨春利[1] 林三宝[1] 

机构地区：[1]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 [2]中国第一汽车股份有限公司技术中心,长春130011 [3]中国航天科技集团公司川南机械厂,泸州646000

出　　处：《焊接学报》2017年第11期11-15,31,共6页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51275134)

摘　　要：文中对低碳钢超声-MAG焊接熔滴过渡行为做了系统分析.试验主要关注在超声作用下,低碳钢焊接中熔滴过渡行为的变化.对熔滴过渡过程进行观测和分析.结果表明,超声波会使MAG焊熔滴过渡分布区间发生改变,短路过渡对电压电流的适应性更强,大滴过渡电压升高,中等电流电压下不稳定的过渡得到一定程度的改善;对于不同的过渡形式,超声均可以增加其熔滴过渡频率,改变熔滴尺寸及形态,使熔滴以更小的尺寸、更高的频率过渡到熔池中;与普通MAG焊相比,超声-MAG焊的电流信号波动较小,熔滴过渡过程更稳定.该分析对于超声辅助电弧焊接技术的发展与应用是一个重要补充.The droplet transfer behavior during Ultrasound-MAG welding of low carbon steel is investigated in this paper. The test mainly focused on the change of droplet transfer behavior in low carbon steel welding under the effect of ultrasonic.Through observation and analysis of the droplet transition process,the results show that ultrasonic can change the distribution range of droplet transfer,the short circuit transfer is more adaptive to the voltage and current,large drop transfer voltage is increased and the instability of the transition has been improved under the moderate current voltage. For different transitional forms,ultrasonic can increase the frequency of the droplet transfer,change the size and shape of the molten drop and the molten droplet can be transited to the molten pool with smaller size and higher frequency. Compared with the conventional MAG welding,the ultrasound-MAG welding current signal fluctuation is smaller and the droplet transfer process is more stable. This study is an important supplement to the development and application of ultrasonic assisted arc welding technology.

关 键 词：超声MAG焊接 熔滴过渡 过渡频率 熔滴尺寸 

分 类 号：TG456[金属学及工艺—焊接]