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铝合金多股复合焊丝脉冲MIG焊接接头组织与性能分析

董晓晶, 李桓, 杨立军, 梁裕

董晓晶, 李桓, 杨立军, 梁裕. 铝合金多股复合焊丝脉冲MIG焊接接头组织与性能分析[J]. 焊接学报, 2019, 40(11): 61-67. DOI: 10.12073/j.hjxb.2019400289
引用本文: 董晓晶, 李桓, 杨立军, 梁裕. 铝合金多股复合焊丝脉冲MIG焊接接头组织与性能分析[J]. 焊接学报, 2019, 40(11): 61-67. DOI: 10.12073/j.hjxb.2019400289
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DONG Xiaojing, LI Huan, YANG Lijun, LIANG Yu. Microstructure and mechanical properties of pulse MIG aluminum alloy welded joints by means of a novel multi-strands composite welding wire[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(11): 61-67. DOI: 10.12073/j.hjxb.2019400289
Citation: DONG Xiaojing, LI Huan, YANG Lijun, LIANG Yu. Microstructure and mechanical properties of pulse MIG aluminum alloy welded joints by means of a novel multi-strands composite welding wire[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(11): 61-67. DOI: 10.12073/j.hjxb.2019400289
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铝合金多股复合焊丝脉冲MIG焊接接头组织与性能分析

  • 1.

    天津大学 天津市现代连接技术重点实验室, 天津 300072

  • 2.

    江苏联捷焊业科技有限公司, 江阴 214400

基金项目: 国家自然科学基金资助项目（51675375）

Microstructure and mechanical properties of pulse MIG aluminum alloy welded joints by means of a novel multi-strands composite welding wire

  • 1.

    Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China

  • 2.

    Jiangsu Lianjie Welding Technology Co.,Ltd., Jiangyin 214400, China

摘要

    摘要
  • 摘要: 选用铝合金多股复合焊丝对5A06板材进行脉冲MIG对接焊接，并与传统单丝TIG焊接接头的组织与性能进行对比.结果表明，采用铝合金多股复合焊丝脉冲MIG焊时，焊接接头的抗拉强度最大可达340 MPa （为母材强度的86.7%）.MIG焊接接头性能与TIG焊相比差异较小，但MIG焊可以提高焊接效率约4倍.焊接接头热影响区的软化主要受较高的热输入导致的晶粒尺寸增加、再结晶比例较大以及析出相的粗化和减少影响，而采用铝合金多股复合焊丝脉冲MIG焊能够降低焊接过程的热输入，细化晶粒，减弱MIG焊接接头中Mg元素的烧损和析出物的减少，达到控制焊接接头软化的目的.
    Abstract: In this study, a novel multi-strand composite welding wire was adopted in 5A06 aluminum pulse MIG welding method, and the microstructures and properties of aluminum alloy multi-strand composite wire welded joints were compared with those of traditional TIG welded joint. The results show that the welded joint used by this novel wire has a better tensile strength, which reaches up to 340 MPa (86.7% of the base metal). The performance of MIG welded joint is similar to that of TIG welded joint, and it can improve welding efficiency by about 4 times. It is also found that the softening of the heat affected zone of the welded joint is mainly affected by the larger grain size and the higher recrystallization ratio, the lower Mg content as well as the coarsening and reduction of the precipitated phase caused by higher heat input. In addition, the pulse MIG welding method with this novel wire can reduce the heat input in welding process, refine grains, and can significantly weaken the loss of Mg element and precipitation. Based on these advantages, the softening of the pulse MIG welded joint decreases and the excellent properties of welded joint can be obtained.
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    • 参考文献(15)
  • [1] Hadadzadeh A, Ghaznavi M M, Kokabi A H. HAZ softening behavior of strain-hardened Al-6.7 Mg alloy welded by GMAW and pulsed GMAW processes[J]. The International Journal of Advanced Manufacturing Technology, 2017, 92(5-8):2255-2265.
    [2] Wang Y, Wei B, Guo Y, et al. Microstructure and mechanical properties of the joint of 6061 aluminum alloy by plasma-MIG hybrid welding[J]. China Welding, 2017, 26(2):58-64.
    [3] Hadadzadeh A, Ghaznavi M M, Kokabi A H. The effect of gas tungsten arc welding and pulsed-gas tungsten arc welding processes parameters on the heat affected zone-softening behavior of strain-hardened Al-6.7 Mg alloy[J]. Materials & Design, 2014, 55(3):335-342.
    [4] 金礼, 徐敏, 薛家祥, 等. 热输入对铝合金双脉冲MIG焊接头性能的影响[J]. 焊接学报, 2018, 39(1):89-92 Jin Li, Xu Min, Xue Jiaxiang, et al. Effect of line energy on properties of aluminum alloy joints in double pulsed MIG welding[J]. Transactions of the China Welding Institution, 2018, 39(1):89-92
    [5] 陆江旭. 5A06铝合金TIG焊焊接接头性能研究与高韧性高强度铝合金焊丝研制[D]. 杭州:浙江大学, 2016.
    [6] 高顶, 阿兰?托马斯?麦尔, 郝锋. 中国矿业大学. 一种多股绞合焊丝:中国, 201455562U[P]. 2010–05–12.
    [7] Fang C, Chen Y, Yang Z, et al. Cable-type welding wire submerged arc surfacing[J]. Journal of Materials Processing Technology, 2017, 249(11):25-31.
    [8] Yan S, Nie Y, Zhu Z, et al. Characteristics of microstructure and fatigue resistance of hybrid fiber laser-MIG welded Al-Mg alloy joints[J]. Applied Surface Science, 2014, 298(11):12-18.
    [9] 李念奎, 凌昊, 聂波, 等. 铝合金材料及其热处理技术[M]. 北京:冶金工业出版社, 2012.
    [10] Dongxia Y, Xiaoyan L, Dingyong H, et al. Effect of minor Er and Zr on microstructure and mechanical properties of Al-Mg-Mn alloy (5083) welded joints[J]. Materials Science and Engineering A, 2013, 561(3):226-231.
    [11] Kim Dongyoon, Kim Dongcheol, Kang Munjin, et al. Effect of aluminum welding wire Mg content on the mechanical properties of Al 5083 alloy weld metal[J]. Journal of Korean Institute of Metal and Materials, 2017, 55(10):716-723.
    [12] Howeyze M, Arabi H, Eivani A R, et al. Strengthening of AA5052 aluminum alloy by equal channel angular pressing followed by softening at room temperature[J]. Materials Science and Engineering A, 2018, 720(12):160-168.
    [13] Lu J, Wu X, Liu Z, et al. Microstructure and mechanical properties of ultrafine-grained copper produced using intermittent ultrasonic-assisted equal-channel angular pressing[J]. Metallurgical and Materials Transactions A, 2016, 47(9):4648-4658.
    [14] Chen Y, Miao Y, Li L, et al. Joint performance of laser-TIG double-side welded 5A06 aluminum alloy[J]. Transactions of Nonferrous Metals Society of China, 2009, 19(1):26-31.
    [15] Zhang L, Li X, Nie Z, et al. Comparison of microstructure and mechanical properties of TIG and laser welding joints of a new Al-Zn-Mg-Cu alloy[J]. Materials & Design, 2016, 92(4):880-887.
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  • 收稿日期:  2019-04-12

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