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超声功率对2219-T351铝合金搅拌摩擦焊接头组织与性能的影响

贺地求, 胡雷, 赵志峰, 赖瑞林

贺地求, 胡雷, 赵志峰, 赖瑞林. 超声功率对2219-T351铝合金搅拌摩擦焊接头组织与性能的影响[J]. 焊接学报, 2020, 41(3): 23-28. DOI: 10.12073/j.hjxb.20190115006
引用本文: 贺地求, 胡雷, 赵志峰, 赖瑞林. 超声功率对2219-T351铝合金搅拌摩擦焊接头组织与性能的影响[J]. 焊接学报, 2020, 41(3): 23-28. DOI: 10.12073/j.hjxb.20190115006
HE Diqiu, HU Lei, ZHAO Zhifeng, LAI Ruilin. Effect of ultrasonic power on microstructure and properties of 2219-T351 aluminum alloy friction stir welding joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(3): 23-28. DOI: 10.12073/j.hjxb.20190115006
Citation: HE Diqiu, HU Lei, ZHAO Zhifeng, LAI Ruilin. Effect of ultrasonic power on microstructure and properties of 2219-T351 aluminum alloy friction stir welding joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(3): 23-28. DOI: 10.12073/j.hjxb.20190115006

超声功率对2219-T351铝合金搅拌摩擦焊接头组织与性能的影响

基金项目: 国家973项目资助(2014CB046605)
详细信息
    作者简介:

    贺地求,1963年出生,硕士,教授;主要从事搅拌摩擦焊研究;发表论文30余篇;Email:hdqzzp@163.com

  • 中图分类号: TG 453.9

Effect of ultrasonic power on microstructure and properties of 2219-T351 aluminum alloy friction stir welding joint

  • 摘要: 采用搅拌摩擦焊和不同功率的超声辅助搅拌摩擦焊对2219-T351铝合金进行焊接试验,测量焊接温度和焊接压力,对焊接接头的微观组织、显微硬度和力学性能进行分析,研究了加入不同超声功率后焊缝的组织性能和材料流动性. 结果表明,超声能降低焊接温度,随着超声功率增加减小的幅度越大. 加入了超声后,焊缝微观组织更加均匀,底部材料的流动情况得到改善,焊缝区有更多的强化相残留,焊接接头的显微硬度、抗拉强度及断后伸长率在加入超声后均有提高,在加入2.25 kW的超声功率时达到最高,最高拉伸强度为331 MPa,可达到母材的80%左右.
    Abstract: Aluminum alloy 2219-T351plates were welded by friction stir welding and ultrasonic assisted friction stir welding with different power. The welding temperature and welding pressure were investigated. Microstructure, microhardness and mechanical properties of welds under different ultrasonic powers were analyzed. The microstructure and material fluidity of the weld with different ultrasonic power were researched. Experimental results showed that Ultrasonic energy can reduce the welding temperature and welding force. With the action of ultrasound, the microstructure of the weld is more uniform, and the fluidity of the bottom material is improved. There is more residual reinforcement phase in the weld zone. The microhardness, tensile strength and elongation of the welded joints are all improved under ultrasonic. All the magnitudes reached the highest when adding 2.25 kW ultrasonic power. The highest tensile trength is 331 MPa, which can reach about 80% of the base metal.
  • 图  1   超声系统示意图

    Figure  1.   Schematic of UAFSW system

    图  2   焊接温度曲线

    Figure  2.   Welding temperature curve

    图  3   焊接作用力

    Figure  3.   Welding force

    图  4   焊缝金相组织全貌

    Figure  4.   Whole microstructure of joints. (a) FSW;(b) 50%UAFSW;(c) 75% UAFSW;(d) 100% UAFSW

    图  5   焊核区金相组织形貌

    Figure  5.   Microstructure of nuggest-zone. (a) FSW; (b) 50% UAFSW; (c) 75% UAFSW; (d) 100% UAFSW

    图  6   二次相扫描及X射线光谱测试

    Figure  6.   SEM images and EDS test. (a) base material;(b) FSW;(c) 50% UAFSW;(d) 75% UAFSW;(e) 100% UAFSW;(f) EDS test

    图  7   不同超声功率下焊接接头显微硬度分布

    Figure  7.   Microhardness distribution of welded joint in cross section with different ultrasonic power

    图  8   不同超声功率下接头抗拉强度及断后伸长率

    Figure  8.   Tensile strength and elongation of joint with different ultrasonic power

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出版历程
  • 收稿日期:  2019-01-14
  • 网络出版日期:  2020-07-12
  • 刊出日期:  2020-02-29

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