Effect of different excitation currents on droplet transfer and weld formation of Al-Mg-Si alloy CMT MIX plus Synchropulse welded joint

被引：6
作者：
Huan, Peng-Cheng [1 ,2 ]
Wei, Xia [1 ,3 ]
Wang, Xiao-Nan [2 ]
Chen, Xia-Ming [2 ]
Chen, Wen-Gang [4 ]
Nagaumi, Hiromi [2 ]
Di, Hong-Shuang [1 ]
机构：
[1] Northeastern Univ, State Key Lab Rolling & Automat, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
[2] Soochow Univ, Sch Iron & Steel, Suzhou 215002, Jiangsu, Peoples R China
[3] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China
[4] Southwest Forestry Univ, Sch Mech & Transportat, Kunming 650224, Yunnan, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 301卷
基金：
中国国家自然科学基金;
关键词：
Welding; Metal forming and shaping; Al-Mg-Si alloy; Cold metal transfer; Excitation current; ARC CHARACTERISTICS; POROSITY;
D O I：
10.1016/j.matlet.2021.130311
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, the droplet transfer behavior, molten pool flow and weld formation of Al-Mg-Si alloy CMT MIX + Synchropulse welded joint under different excitation currents were studied. The external magnetic field (EMF) can effectively suppress the porosity and macroscopic pore (>200 mu m), especially at 20 A and 30 A excitation currents level. The EMF significantly reduces the droplet size (0 A -* 20 A, 1.6 mm -* 1.4 mm), which reduces the droplet heat and the impact force on the molten pool. The EMF changes the impact position of the molten droplet on the molten pool, making the temperature distribution on both sides of the molten pool inconsistent, which finally leads to asymmetrical weld cross-sectional morphology.
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页数：4
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