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2219铝合金搅拌摩擦焊接头晶间腐蚀分析

张华, 庄欠玉, 张贺

张华, 庄欠玉, 张贺. 2219铝合金搅拌摩擦焊接头晶间腐蚀分析[J]. 焊接学报, 2016, 37(8): 79-82.
引用本文: 张华, 庄欠玉, 张贺. 2219铝合金搅拌摩擦焊接头晶间腐蚀分析[J]. 焊接学报, 2016, 37(8): 79-82.
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ZHANG Hua, ZHUANG Qianyu, ZHANG He. Analysis of intergranular corrosion of friction stir welded 2219 aluminium alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 79-82.
Citation: ZHANG Hua, ZHUANG Qianyu, ZHANG He. Analysis of intergranular corrosion of friction stir welded 2219 aluminium alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 79-82.
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2219铝合金搅拌摩擦焊接头晶间腐蚀分析

  • 1.

    北京石油化工学院 光机电装备技术北京市重点实验室, 北京 102617

  • 2.

    山东核电有限公司, 烟台 265116

  • 3.

    中车青岛四方机车车辆股份有限公司, 青岛 266111

基金项目: 国家自然科学基金青年科学基金资助项目（51105030）

Analysis of intergranular corrosion of friction stir welded 2219 aluminium alloy

  • 1.

    Beijing Institute of Petro-Chemical Technology Beijing Key Laboratory of Opto-Mechatronic Equipment Technology, Beijing 102617, China

  • 2.

    Shandong Nuclear Power Company Ltd., Yantai 265116, China

  • 3.

    CRRC Qingdao Sifang Company Ltd., Qingdao 266111, China

摘要

    摘要
  • 摘要: 采用晶间腐蚀试验研究了2219铝合金搅拌摩擦焊接头的晶间腐蚀行为，结合接头显微组织、微观硬度、腐蚀形貌及腐蚀深度，分析母材与焊核区的差异，并对接头晶间腐蚀机理进行了初步的探讨.结果表明，焊核区为细小的等轴晶组织，且接头上表面焊核区的晶粒要大于下表面焊核区的晶粒；母材区硬度最高，下表面焊核区硬度最低；焊核区的耐蚀性优于母材，且上表面焊核区耐蚀性优于下表面焊核区，母材最大腐蚀深度为145.9 μm，上表面焊核区及下表面焊核区最大腐蚀深度为46.3 μm和84.1 μm.
    Abstract: The intergranular corrosion behavior of friction stir welded 2219 aluminium alloy was investigated. Microstructure, micro-hardness, corrosion morphology and corrosion depth were studied to analyze the difference between BM and WNZ, and intergranular corrosion mechanism of FSW joint was preliminary discussed. The results show that WNZ consists of fine equiaxed grains, and the grain size on top surface is slightly bigger than that on root surface. The highest microhardness is located in the BM while the lowest in the WNZ on root surface. The corrosion resistance of WNZ is much superior than that of BM, and WNZ on top surface is slightly superior than that on root surface. The maximum corrosion depth in BM is 145.9 μm while the maximum corrosion depths in WNZ on top surface and root surface are 46.3 μm and 84.1μm respectively.
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    • 参考文献(10)
  • [1] 孟庆国, 方洪渊, 徐文立, 等. 2219铝合金双丝焊热影响区组织及力学性能[J]. 焊接学报, 2006, 27(3):9-12. Meng Qingguo, Fang Hongyuan, Xu Wenli, et al. Microstructure and mechanical properties of 2219 Al-alloy heat-affected zone with twin wire welding[J]. Transactions of the China Welding Institution, 2006, 27(3):9-12.
    [2] Dawes C, Thomas W M. Friction stir joining of aluminum alloys[C]. Bulletin 6, TWI, December 1995:124.
    [3] 邢美源, 姚君山, 刘杰. 新一代运载贮箱搅拌摩擦焊应用研究[J]. 上海航天, 2006, 23(4):39-43. Xing Meiyuan, Yao Junshan, Liu Jie. Application research of FSW welding process for joining propellant tanks in new generation launch vehicle[J]. Aerospace Shanghai, 2006, 23(4):39-43.
    [4] 张华, 张贺, 孙大同, 等. 2219铝合金母材及搅拌摩擦焊接头应力腐蚀敏感性[J]. 焊接学报, 2014, 35(12):7-10. Zhang Hua, Zhang He, Sun Datong, et al. Stress corrosion cracking susceptibility of 2219 aluminium alloy parent metal and friction stir weldment[J]. Transactions of the China Welding Institution, 2014, 35(12):7-10.
    [5] Xu W, Liu J. Microstructure and pitting corrosion of friction stir welded joints in 2219-O aluminum alloy thick plate[J]. Corrosion Science, 2009, 51(11):2743-2751.
    [6] Bousquet E, Poulon-Quintin A, Puiggali M, et al. Relationship between microstructure, microhardness and corrosion sensitivity of an AA 2024-T3 friction stir welded joint[J]. Corrosion Science, 2011, 53(9):3026-3034.
    [7] Xu W, Liu J, Zhu H. Pitting corrosion of friction stir welded aluminum alloy thick plate in alkaline chloride solution[J].Electrochimica Acta, 2010, 55(8):2918-2923.
    [8] Kang J, Fu R, Luan G, et al. In-situ investigation on the pitting corrosion behavior of friction stir welded joint of AA2024-T3 aluminium alloy[J]. Corrosion Science, 2010, 52(2):620-626.
    [9] Jariyaboon M, Davenport A J, Ambat R, et al. The effect of welding parameters on the corrosion behavior of friction stir welded AA 2024-T351[J]. Corrosion Science, 2007, 49(2):877-909.
    [10] 张华, 孙大同, 张贺, 等. 2219铝合金搅拌摩擦焊接头腐蚀行为[J]. 焊接学报, 2014, 35(7):39-42. Zhang Hua, Sun Datong, Zhang He, et al. Corrosion behavior of friction stir welded 2219 aluminum alloy[J]. Transactions of the China Welding Institution, 2014, 35(7):39-42.
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  • 收稿日期:  2014-10-14

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