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Improving Q345 weld microstructure and mechanical properties with high frequency current arc in keyhole mode TIG welding

YueXiao Fang,ZuMing Liu,ShuangLin Cui,Yu Zhang,JiaYu Qiu,Zhen Luo

Journal of Materials Processing Technology（2017）

Cited 36|Views4
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Abstract
By introducing of the high frequency current arc to the K-TIG process, the current threshold to obtain stable fully penetrated keyhole is much reduced and the weld melting (WM) zone grain is much refined.
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Key words
High frequency current arc,Low alloy steel,K-TIG,Microstructure refinement,Keyhole welding
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