活性剂对3003铝合金直流A-TIG焊的影响  

Effects of Activating Fluxes on DC A-TIG Welding of 3003 Aluminum Alloy

作　　者：周泽杰[1] 黄志超[1] 

机构地区：[1]华东交通大学载运工具与装备教育部重点实验室,江西南昌330013

出　　处：《热加工工艺》2013年第11期168-171,共4页Hot Working Technology

基　　金：江西省主要学科学术和技术带头人基金资助项目(20113BCB22010);江西省青年科学基金资助项目(20122BAB216022);江西省教育厅基金资助项目(GJJ11093)

摘　　要：对3003铝合金进行直流A-TlG焊接试验,选用卤化物NaCl、CaF2和氧化物SiO2、MnO2、TiO2作为活性剂,分别研究了单一组元和多组元表面活性剂对焊接熔深、焊缝成形以及接头组织的影响。结果表明:在进行铝合金直流TIG焊时,在焊缝表面涂敷一定成分活性剂能够增加焊缝熔深,改善焊缝质量,提高焊接生产率。总体来看,除NaCl增加熔深有限外,其余活性剂普遍增加熔深1倍以上。多组元配方活性剂增加熔深效果好于单组元活性剂,其中PS5活性剂熔深增加3倍以上,且焊缝成形良好,未见裂纹、气孔、夹渣等缺陷。分别对TIG焊和A-TIG焊接头组织进行观察,A-TIG焊较TIG焊的焊缝组织明显细小,而活性剂对焊接热影响区的平均晶粒度影响不大。DC A-TIG welding on 3003 Aluminum alloy was investigated. The single component and multi-component of halide NaCl, CaF2 and oxide SiO2, MnO2, TiOv were served as activating fluxes to study the effect on weld penetration, weld forming and joint microstructure. The result shows that DC A-TIG with certain activating fluxes can improve weld penetration, quality and productivity. Overall, the activating fluxes could increase weld penetration more than twice, except for NaC1. Multi- component of halides and oxides has more significant effect on weld penetration than single component. The activating flux named PS5 could improve weld penetration over 3 times, and there is no weld defects such as cracks, blowhole and weld slag inclusions in weld joint. From metallographic structure of TIG t and A-TIG weld joint, it can be seen that the welding seam of TIG welding has a bigger coarse grain structure than A-TIG welding, but the average grain size in HAZ of A-TIG and TIG is same.

关 键 词：铝合金 A-TIG焊 活性剂 焊缝熔深 

分 类 号：TG457.14[金属学及工艺—焊接]