单组分活性剂对二氧化碳气体保护焊熔池形态的影响

Effect of Single Component Active Flux on Weld Pool for Carbon Dioxide Welding

针对CO_2气体保护焊熔深浅、飞溅大的缺点,研究了添加单组分活性剂对CO_2气体保护焊熔池形态以及熔滴过渡行为的影响。实验结果表明,活性剂的添加对焊缝形态、熔池形态、熔滴过渡方式均有显著的影响。活性剂Se可以通过改变熔池对流模式的方式增加焊缝熔深。活性剂Al可以通过改变熔池与熔滴之间的表明张力差来增加熔滴短路过渡频率。活性剂的添加还会引起燃弧功的变化,燃弧功的变化会引起母材熔化量相同趋势的变化。

Aiming at the shortcomings of poor melting and much spatter, this paper focuses on the effect of single compo- nent active flux on weld pool and droplet transfer for carbon dioxide welding. The results suggest that, addition of active flux has a significant effect on weld appearance, weld pool shape and droplet transfer modes. The active flux Se increases the weld penetration by changing the mode of weld pool convection. The active flux A1 increases droplet short circuit transi- tion frequency by changing the difference in surface tension between weld pool and droplet. Besides, the active flux changes the arcing work, and thus the fusion quality of base metal.