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高强铝合金复合脉冲VPTIG焊缝组织和性能

从保强 齐铂金 周兴国 罗 军

从保强, 齐铂金, 周兴国, 等 . 高强铝合金复合脉冲VPTIG焊缝组织和性能[J]. 北京航空航天大学学报, 2010, 36(1): 1-5.
引用本文: 从保强, 齐铂金, 周兴国, 等 . 高强铝合金复合脉冲VPTIG焊缝组织和性能[J]. 北京航空航天大学学报, 2010, 36(1): 1-5.
Cong Baoqiang, Qi Bojin, Zhou Xingguo, et al. Microstructure and mechanical properties of hybrid pulse VPTIG arc welding of high strength aluminum alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(1): 1-5. (in Chinese)
Citation: Cong Baoqiang, Qi Bojin, Zhou Xingguo, et al. Microstructure and mechanical properties of hybrid pulse VPTIG arc welding of high strength aluminum alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(1): 1-5. (in Chinese)

高强铝合金复合脉冲VPTIG焊缝组织和性能

详细信息
    作者简介:

    从保强(1979-),男,安徽砀山人,博士生,congbq@me.buaa.edu.cn.

  • 中图分类号: TG 457.14; TG 442

Microstructure and mechanical properties of hybrid pulse VPTIG arc welding of high strength aluminum alloy

  • 摘要: 采用超快速变换复合超音频脉冲方波变极性TIG电弧焊接工艺进行2219-T87高强铝合金焊接,研究分析了焊缝显微组织和接头拉伸性能变化.结果表明,2219-T87铝合金复合超音频脉冲电流变极性焊接接头的组织和性能均发生显著变化,焊缝区显微组织明显细化,由粗大柱状晶向细小等轴晶转变,接头抗拉强度和断后伸长率显著提高.接头断口由脆性断裂主要特征转变为"韧性+脆性"的混合型断裂模式.在一定范围内,脉冲电流频率越高,脉冲占空比越小,作用效果越明显.复合超音频脉冲电流频率为40kHz,脉冲电流占空比为20%时,接头抗拉强度和断后伸长率分别达到母材金属的70%和58%.

     

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出版历程
  • 收稿日期:  2008-12-01
  • 网络出版日期:  2010-01-31

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