金属氯化物A-TIG焊熔深作用机理

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.

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

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.