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ZHANG Qinlian, YANG Chunli, LIN Sanbao, FAN Chenglei. Characteristics of weld formation in variable polarity plasma arc horizontal welding of 2A14 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (9): 79-82.
Citation: ZHANG Qinlian, YANG Chunli, LIN Sanbao, FAN Chenglei. Characteristics of weld formation in variable polarity plasma arc horizontal welding of 2A14 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (9): 79-82.
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Characteristics of weld formation in variable polarity plasma arc horizontal welding of 2A14 aluminum alloy

  • State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

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  • Received Date: April 16, 2013
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  • The variable polarity plasma arc welding of 6mm thick 2A14 aluminum alloy sheets was carried out.The reason for defects occurred during horizontal welding was clarified through analyzing the forces acting on the welding pool.The difficulties in VPPA horizontal welding were formation of undercuts on both sides and the gathering of blowholes around the boundary in upper part of the weld.It was found that less welding heat input was beneficial for avoiding the undercut on top side,but larger welding heat input was beneficial for reducing undercut on bottom side.The defects during horizontal welding might be attributed to the fluid flow caused by gravity or the balance of the forces acting on the welding pool.
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