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铝合金搅拌摩擦焊缝摩擦塞补焊组织与力学性能

刘凯旋, 孙转平, 杨新岐, 杜波, 宋建岭

刘凯旋, 孙转平, 杨新岐, 杜波, 宋建岭. 铝合金搅拌摩擦焊缝摩擦塞补焊组织与力学性能[J]. 焊接学报, 2019, 40(6): 118-125. DOI: 10.12073/j.hjxb.2019400165
引用本文: 刘凯旋, 孙转平, 杨新岐, 杜波, 宋建岭. 铝合金搅拌摩擦焊缝摩擦塞补焊组织与力学性能[J]. 焊接学报, 2019, 40(6): 118-125. DOI: 10.12073/j.hjxb.2019400165
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LIU Kaixuan, SUN Zhuanping, YANG Xinqi, DU Bo, SONG Jianling. Microstructure and mechanical properties of friction plug welding for friction stir welded aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(6): 118-125. DOI: 10.12073/j.hjxb.2019400165
Citation: LIU Kaixuan, SUN Zhuanping, YANG Xinqi, DU Bo, SONG Jianling. Microstructure and mechanical properties of friction plug welding for friction stir welded aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(6): 118-125. DOI: 10.12073/j.hjxb.2019400165
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铝合金搅拌摩擦焊缝摩擦塞补焊组织与力学性能

  • 1.

    天津大学 天津市现代连接技术重点实验室, 天津 300072

  • 2.

    天津大学 天津市现代连接技术重点实验室, 天津 300072;天津航天长征火箭制造有限公司, 天津 300462

  • 3.

    天津航天长征火箭制造有限公司, 天津 300462

Microstructure and mechanical properties of friction plug welding for friction stir welded aluminum alloy

  • 1.

    Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University,, Tianjin 300072, China

  • 2.

    Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University,, Tianjin 300072, China;Tianjin Long March Rocket Manufacture Co., Ltd., Tianjin 300462, China

  • 3.

    Tianjin Long March Rocket Manufacture Co., Ltd., Tianjin 300462, China

摘要

    摘要
  • 摘要: 对2219-T87铝合金搅拌摩擦焊缝进行摩擦塞补焊工艺试验，对塞补焊接头的焊缝成形、显微组织、显微硬度和抗拉强度进行了观察和测试，对拉伸断口进行了扫描电镜观察.结果表明，在7 500 r/min的焊接转速和40~55 kN的焊接压力下可获得无缺陷摩擦塞补焊接头；塞补焊接头沿垂直于搅拌焊缝方向的最大抗拉强度和断后伸长率分别可以达到336 MPa和8%，分别相当于母材抗拉强度和断后伸长率的73.9%和66.7%；在母材和塞棒之间的底部结合面是最薄弱的区域，如何控制该区域的结合强度是影响摩擦塞补焊接头拉伸性能的关键因素.
    Abstract: Friction plug welding for AA2219-T87 friction stir welds were performed, the macro/micro structures, hardness distributions and tensile strength were observed and tested, and the tensile fracture was observed by scanning electron microscope. The main findings are as follows:With 7500rpm rotational speed and axial force 40~55 kN can obtain defect-free plug welded joint; The ultimate tensile strength (UTS) and elongation of FPW joint in perpendicular direction can reach 336 MPa and 8%, respectively, approximately 73. 9% and 66. 7% being equivalent to that of base metal; The weakest bonding regions are always produced at the bottom bonding interface between the BM and PM and how to control the connection quality of the bottom bonding interface should be the key factor affecting the tensile properties of the friction plug welding joint.
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    • 参考文献(10)
  • [1] Wang Dayong, Feng Jicai, Guo Delun, et al. Process of friction-stir welding high-strength aluminum alloy and mechanical properties of joint[J]. China Welding, 2004, 13(2):159-162.
    [2] 邢丽,柯黎明,刘鸽平,等.铝合金LD10的搅拌摩擦焊组织及性能分析[J].焊接学报, 2002, 23(6):55-58 Xing Li, Ke Liming, Liu Geping, et al. Microstructure and performance analysis of friction stir welding of aluminum alloy LD10[J]. Transactions of the China Welding Institution, 2002, 23(6):55-58
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  • 收稿日期:  2018-07-07

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