不同气体及熔滴过渡方式对气体保护焊熔敷金属的影响

摘要

对CO2焊、富氩焊的短路过渡与非短路过渡熔敷金属进行试验,研究表明,富氩焊飞溅小,焊工操作体验好,熔敷金属综合性能优异,焊缝合氧量较低.去应力热处理后强度降低,冲击吸收能量有所提高.同等条件下短路过渡冲击吸收能量高于非短路过渡,但强度及化学成分与熔滴过渡形式关系不大.熔敷金属的硫、磷含量与焊丝有关,与保护气体无关.%Through the experimental study on CO2 welding,short circuit transition of argon rich welding and non-short circuiting transition of deposited metal,the result shows low spatter of the argon rich welding,the good welding operating experience,excellent comprehensive properties of weld metal,and low oxygen content of welds After heat treatment of stress relieving,the strength decreases and the impact energy increases.Under the same conditions,the impact absorbed energy of short circuit transition is higher than that of the non-short circuit transition,but the strength and chemical composition are not related to the droplet transfer form.The content of sulfur and phosphorus in the deposited metal is related to the welding wire but not related to the shielding gas.