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

doi:10.12073/j.hjxb.2018390122

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

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出版历程
- 收稿日期: 2017-09-24

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

LI Feng1, DANG Pengfei1, Liu Xuesong2

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%.
- 搅拌摩擦焊 /
- 不旋转轴肩 /
- 铝镁异种材料 /
- 微观组织 /
- 抗拉强度
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.
- friction stir welding /
- non-rotational shoulder /
- dissimilar Al/Mg alloys /
- microstructure /
- tensile strength.

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[1]

李达, 孙明辉, 崔占全. 工艺参数对铝镁搅拌摩擦焊焊缝成形质量的影响[J]. 焊接学报, 2011, 32(8): 97-100.Li Da, Sun Minghui, Cui Zhanquan. Effect of parameters on friction stir welding joint of 7075 Al and AZ31B Mg[J]. Transactions of the China Welding Institution, 2011, 32(8): 97-100.[2] 许志武, 李政玮, 冯艳, 等. 静轴肩辅助铝镁搅拌摩擦搭接接头的组织与性能[J]. 焊接学报, 2017, 38(4): 1-6.Xu Zhiwu, Li Zhengwei, Feng Yan,et al. Microstructure and mechanical properties of Mg/Al friction stir lap welding joint assisted by stationary shoulder[J]. Transactions of the China Welding Institution, 2017, 38(4): 1-6.[3] 刘震磊, 崔祜涛, 姬书得, 等. 温度峰值影响6061铝/AZ31B镁异种材料FSW接头成形的规律[J]. 焊接学报, 2016, 37(6): 23-26.Liu Zhenlei, Cui Hutao, Ji Shude,et al. Effect of peak temperature on formation of 6061Al/AZ31BMg dissimilar FSW joint[J]. Transactions of the China Welding Institution, 2016, 37(6): 23-26.[4] Yan Jiuchun, Xu Zhiwu, Li Zhiyuan,et al. Microstructure characteristics and performance of dissimilar welds between magnesium alloy and aluminum formed by friction stirring[J]. Scripta Materialia, 2005, 53(5): 585-589.[5] 姬书得, 孟祥晨, 黄永宪, 等. 搅拌头旋转频率对静止轴肩搅拌摩擦焊接头力学性能的影响规律[J]. 焊接学报, 2015, 36(1): 51-54.Ji Shude, Meng Xiangchen, Huang Yongxian,et al. Effect of rotational velocity of tool on mechanical properties of stationary shoulder friction stir welding [J]. Transactions of the China Welding Institution, 2015, 36(1): 51-54.[6] Li Dongxiao Yang Xinqi, Cui Lei,et al. Effect of welding parameters on microstructure and mechanical properties of AA6061-T6 butt welded joints by stationary shoulder friction stir welding[J]. Materials & Design, 2014, 64: 251-260.[7] Wu Hao, Chen Yingchun, Strong David,et al. Stationary shoulder FSW for joining high strength aluminum alloys[J]. Journal of Materials Processing Technology, 2015, 221: 187-196.[8] Ji Shude, Meng Xiangchen, Liu Zhenlei,et al. Dissimilar friction stir welding of 6061 aluminum alloy and AZ31 magnesium alloy assisted with ultrasonic[J]. Materials Letters, 2017, 201: 173-176.[9] Firouzdor Vahid, Kou Sindo. Al-to-Mg friction stir welding: effect of material position, travel speed, and rotationspeed[J]. Metallergical & Materials Transanctions A, 2010, 41(11): 2914-2935.[10] Mofid M A, Abdollahzadeh A, Ghaini F M. The effect of water cooling during dissimilar friction stir welding of Al alloy to Mg alloy[J]. Materials & Design, 2012, 36: 161-167.[11] Mofid M A, Abdollahzadeh A, Ghaini F M. Submerged friction-stir welding (SFSW) underwater and under liquid nitrogen: an improved method to join Al alloys to Mg alloys[J]. Metallergical & Materials Transanctions A, 2012, 43: 5106-5114.[12] Zhao Yong, Lu Zhengping, Yan Keng,et al. Microstructural characterizations and mechanical properties in underwater friction stir welding of aluminum and magnesium dissimilar alloys[J]. Materials & Letters, 2015, 65: 675-681.[13] Ji Shude, Huang Ruofei,Meng Xiangchen,et al. Enhancing friction stir weldability of 6061-T6 Al and AZ31B Mg alloys assisted by external non-rotational shoulder[J]. Journal of Materials Engineering & Performance, 2017, 26(5): 2359-2367.[14] 申浩, 杨新岐, 李冬晓, 等. 6061-T6铝合金的静止轴肩搅拌摩擦焊工艺及组织性能[J]. 焊接学报, 2016, 37(5): 119-123.Shen Hao, Yang Xinqi, Li Dongxiao,et al. Microstructures and mechanical properties of 6061-T6 aluminum alloy welded by stationary shoulder friction stir welding process[J]. Transactions of the China Welding Institution, 2016, 37(5): 119-123.[15] Wang Yaobin, Huang Yongxian, Meng Xiangchen,et al. Microstructural evolution and mechanical properties of Mg-Zn-Y-Zr alloy during friction stir processing[J]. Journal of Alloys and Compounds, 2017, 696: 875-883.[16] Liu Zhenlei, Meng Xiangchen, Ji Shude,et al. Improving tensile properties of Al/Mg joint by smashing intermetallic compounds via ultrasonic-assisted stationary shoulder friction stir welding[J]. Journal of Manufacturing Processes, 2018, 31: 552-559.