双丝三电弧铝合金熔丝成形性  

Formability of aluminum alloy fusing wires with tri-arc double wires

作　　者：刘丹[1,2] LIU Dan(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;School of Materials Engineering,Liaoning Mechatronics College,Dandong 118000,China)

机构地区：[1]沈阳工业大学材料科学与工程学院 [2]辽宁机电职业技术学院材料工程系

出　　处：《沈阳工业大学学报》2019年第4期395-400,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(51575362);辽宁机电职业技术学院科研项目(2018006)

摘　　要：为了实现双丝三电弧铝合金熔丝的高效化制造,通过进行焊缝形貌分析与力学实验,找出双丝三电弧铝合金熔丝成形的影响因素.结果表明,当增加A3弧电流时,熔深减少,热影响区减小,焊接变形得到改善.阴极清理效果随着送丝速度的增加而增加,但随着A3弧电流的增加而减小.当A3弧电流为35 A时,熔丝质量最佳.当电极端部至工件表面的距离处于9~14 mm之间时,阴极清理效果最佳.相比普通纯Ar保护情况,采用精Ar保护的焊缝表面阴极清理区更宽,焊缝表面也更加干净光亮.In order to achieve highly efficient production of aluminium alloy fusing wires under tri-arc and double wires,through weld morphology analysis and mechanical experiments,the influencing factors to the formability of aluminium alloy fusing wires with tri-arc and double wires were discovered. The results showthat when A3 arc current increases,weld penetration reduces,heat affected zone becomes smaller,and welding deformation gets improved. Cathode cleaning effect increases with the increase of feeding speed and decreases with A3 arc current. When A3 arc current is 35 A,the quality of fusing wire is optimum. When the distance between electrode terminal and workpiece surface ranges from 9 mm to 14 mm,cleaning effect is optimum. The cathode cleaning zone on weld surface with precise Ar protection is wider than that with the ordinary pure Ar protection,and the surface with precise Ar protection is relatively cleaner and lighter.

关 键 词：5356铝合金 双丝焊 第三电弧 熔敷率 阴极 焊缝成形系数 焊接变形 高效熔丝 

分 类 号：TG249[金属学及工艺—铸造]