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基于不旋转轴肩的铝镁异种材料搅拌摩擦焊

李丰1,党鹏飞1,刘雪松2

李丰1,党鹏飞1,刘雪松2. 基于不旋转轴肩的铝镁异种材料搅拌摩擦焊[J]. 焊接学报, 2018, 39(5): 55-58. DOI: 10.12073/j.hjxb.2018390122
引用本文: 李丰1,党鹏飞1,刘雪松2. 基于不旋转轴肩的铝镁异种材料搅拌摩擦焊[J]. 焊接学报, 2018, 39(5): 55-58. DOI: 10.12073/j.hjxb.2018390122
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LI Feng1, DANG Pengfei1, Liu Xuesong2. Dissimilar friction stir welding of Al/Mg alloys based on non-rotational shoulder[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(5): 55-58. DOI: 10.12073/j.hjxb.2018390122
Citation: LI Feng1, DANG Pengfei1, Liu Xuesong2. Dissimilar friction stir welding of Al/Mg alloys based on non-rotational shoulder[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(5): 55-58. DOI: 10.12073/j.hjxb.2018390122
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基于不旋转轴肩的铝镁异种材料搅拌摩擦焊

Dissimilar friction stir welding of Al/Mg alloys based on non-rotational shoulder

摘要

    摘要
  • 摘要: 焊具是搅拌摩擦焊的核心，对焊接质量起至关重要的作用. 利用不旋转轴肩焊接系统对6061-T6铝和AZ31B镁合金进行连接，重点分析传统和不旋转轴肩焊接系统下接头成形和力学性能等. 结果表明,与传统工艺相比，采用不旋转轴肩工艺的接头表面成形更加光滑，焊核区以典型铝镁混合的叠层结构为主,且铝镁冶金结合界面呈弯曲状，有效地增强了铝镁异种材料的机械咬合效果；焊缝区金属间化合物层明显减小，其主要是由不旋转轴肩增强焊核区材料的搅拌效果并起到“热沉”的作用所致. 采用不旋转轴肩的接头最大抗拉强度为137 MPa，较传统工艺提高了28%.
    Abstract: Welding tool is the core of FSW, which plays a significant role on joint quality. In this paper, a non-rotational tool system was employed to join 6061-T6 and AZ31B alloys. Joint formation and mechanical property of joints based on traditional and non-rotational shoulder processes were mainly analyzed. The results showed that compared with traditional tool, the smooth surface appearance was attained and complex Al/Mg intercalated layer structures and bended Al/Mg joining interface formed in nugget zone based on non-rotational shoulder tool system, improving mechanical interlocking effectively. Moreover, the thickness of intermetallic compounds layer was also smaller than those of traditional tool, resulting from the severer stirring actions and heat sink induced by the non-rotational shoulder. The maximum tensile strength of joint obtained by non-rotational shoulder reached 137 MPa, which was improved by 28% compared with traditional tool.
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  • 收稿日期:  2017-09-24

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