| 2A14铝合金变极性等离子横向焊缝成形特点 |
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| 引用本文： | 张勤练,杨春利,林三宝,范成磊.2A14铝合金变极性等离子横向焊缝成形特点[J].焊接学报,2013(9):79-82. |
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| 作者姓名： | 张勤练 杨春利 林三宝 范成磊 |
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| 作者单位： | 哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001,哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001,哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001,哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001 |
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| 摘 要： | 对6 mm厚2A14铝合金变极性等离子弧横向焊接的难点及焊接工艺参数的特点进行了研究,通过横向焊穿孔熔池受力分析,阐释了变极性等离子横向焊缝成形缺陷产生的原因.变极性等离子弧横向焊接的难点是焊缝正面和背面的咬边缺陷及焊缝上部(靠近熔合线)宏观气孔的聚集.稍小的焊接线能量有利于消除横向焊缝正面咬边缺陷,稍大的焊接线能量有利于消除焊缝背面咬边缺陷.分析认为变极性等离子横向焊缺陷的产生与穿孔熔池受力平衡及重力方向改变导致的流动密切相关.
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| 关 键 词： | 变极性等离子 铝合金横焊 焊缝成形 焊接缺陷 |
| 收稿时间： | 2013/4/17 0:00:00 |
Characteristics of weld formation in variable polarity plasma arc horizontal welding of 2A14 aluminum alloy |
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| ZHANG Qinlian,YANG Chunli,LIN Sanbao and 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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| Authors: | ZHANG Qinlian YANG Chunli LIN Sanbao and FAN Chenglei |
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| Affiliation: | State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China and State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | 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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| Keywords: | variable polarity plasma arc( VPPA) horizontal welding of aluminum alloy weld formation weld defect |
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