金属氯化物A-TIG焊熔深作用机理  

Study on effect of metal chlorides on penetration depth in ATIG welding

作　　者：张兆栋[1] 凡福群[1] 

机构地区：[1]辽宁省先进连接技术重点实验室大连理工大学材料科学与工程学院,大连116024

出　　处：《焊接学报》2013年第5期29-32,114,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51004022);高校基本科研业务费项目(DUT12LAB14)

摘　　要：以KCl,MnCl2和ZnCl2三种金属氯化物为活性剂,在镁合金、铝合金及Q235钢表面进行交流A-TIG堆焊试验,从元素第一电离能的角度,研究了这三种活性剂对不同材料焊接熔深的影响规律,探讨了金属氯化物影响熔深的作用机理.结果表明,A-TIG焊过程中,氯化物中的金属元素能够进入电弧导电空间,并影响电弧状态,焊接熔深与活性剂中金属元素的第一电离能密切相关.金属氯化物对不同材料熔深的影响规律相同,均随着活性剂中金属元素第一电离能的增加呈现先增加后降低的趋势.Three metal chlorides including KCl,MnCl2 and ZnCl2 were used as activating fluxes for the bead-on-plate ATIG welding on magnesium alloy,aluminum alloy and Q235 steel.From the viewpoint of first ionization energy of the element,the effect of the three fluxes on the penetration depth was studied,and the mechanism was also discussed.The results indicated that metal element in the fluxes would move into the arc plasma and had influence on the arc state in the A-TIG welding process.There is a close relationship between the weld penetration depth and the first ionization energy of metal element in the fluxes.The regularities of metal chlorides on different materials are the same,and with the increase of first ionization energy of flux metal element in the fluxes,the penetration depth increases firstly and then decreases.

关 键 词：金属氯化物 交流钨极氩弧焊 熔深 电离能 

分 类 号：TG403[金属学及工艺—焊接]