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铝/钢异种金属火焰钎焊接头组织和性能

杨金龙, 薛松柏, 薛鹏, 戴玮, 吕兆萍, 张满

杨金龙, 薛松柏, 薛鹏, 戴玮, 吕兆萍, 张满. 铝/钢异种金属火焰钎焊接头组织和性能[J]. 焊接学报, 2015, 36(1): 63-66.
引用本文: 杨金龙, 薛松柏, 薛鹏, 戴玮, 吕兆萍, 张满. 铝/钢异种金属火焰钎焊接头组织和性能[J]. 焊接学报, 2015, 36(1): 63-66.
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YANG Jinlong, XUE Songbai, XUE Peng, DAI Wei, LV Zhaoping, ZHANG Man. Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(1): 63-66.
Citation: YANG Jinlong, XUE Songbai, XUE Peng, DAI Wei, LV Zhaoping, ZHANG Man. Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(1): 63-66.
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铝/钢异种金属火焰钎焊接头组织和性能

  • 1.

    南京航空航天大学材料科学与技术学院, 南京 210016

  • 2.

    浙江新锐焊接材料有限公司, 绍兴 312452

  • 3.

    淮阴工学院机械工程学院, 淮安 223003

基金项目: 国家自然科学基金资助项目(51375233)

Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing

  • 1.

    College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • 2.

    Zhejiang Xinrui Welding Material Company Limited, Shengzhou 312452, China

  • 3.

    College of Mechanical Engineering, Huaiyin Institute of Technology, Huaian 223003, China

摘要

    摘要
  • 摘要: 通过扫描电镜、能谱分析和X射线衍射等方法研究了火焰钎焊时Zn-xAl钎料的润湿性能、铝/钢钎焊接头界面显微组织、金属间化合物层以及接头抗剪强度.结果表明,Zn-xAl钎料配合改性CsF-RbF-AlF3钎剂,可以有效地去除母材表面氧化膜,从而提高钎焊接头力学性能.随着Al元素含量增加,钎料铺展性和填缝性随之提高,但是钎焊接头强度先升后降,Al元素含量为15%时,钎焊接头力学性能最佳.钎焊接头显微组织分析结果表明,金属间化合物主要为Fe4Al13相. Zn-xAl钎料中Al元素含量较低时,界面层由富锌相和Fe4Al13相组成.随着Al元素含量的增加,在Zn-25Al钎焊接头界面出现第二层金属间化合物Fe2Al5相.
    Abstract: The wettability, microstructure, intermetallic compound (IMC) layer and mechanical properties of aluminum/stainless steel joints brazed with Zn-xAl filler metals were investigated by means of scanning electron microscope, energy dispersive X-ray spectrometer and X-ray diffraction. The results indicate that the oxide film on the base metal could be effectively removed by the modified CsF-RbF-AlF3 flux, and the excellent mechanical properties of the brazed joints were obtained. The spreading area as well as the clearance filling ability of Zn-xAl filler metal was both improved with by increasing the content of Al in the filler metals. However, the shear strength of the joint increased first and decreased afterwards, and the best mechanical property of brazed joint is obtained when the content of Al is 15%. It has been found that when the content of Al is low, the interfacial layer is composed of Zn-rich and Fe4Al13 phase. As for the excessive amount of Al, additional Fe2Al5 phase is visible at the interface.
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    • 参考文献(8)
  • [1] Choi C Y, Kim D C,Nam D G, et al. A hybrid joining technology for aluminum/zinc coated steels in vehicles[J]. Journal of Materials & Technology, 2010, 26(9):858-864.
    [2] Zhang H T, Liu J K. Microstructure characteristics and mechanical property of aluminum alloy/stainless steel lap joints fabricated by MIG welding-brazing process[J]. Materials Science and Engineering A, 2011, 528(19):6179-6185.
    [3] 吴铭方,司乃潮,王敬.铁/铝扩散偶界面反应层生长机理分析[J].焊接学报, 2011, 32(5):29-32. Wu Mingfang, Si Naichao, Wang Jing. Analysis on growth mechanism on interfacial interlayer on Fe/Al couple[J]. Transactions of the China Welding Institution, 2011, 32(5):29-32.
    [4] 葛佳棋,蒋勇,王克鸿.包覆钎料铝-钢螺柱焊接头组织及性能[J].焊接学报, 2012, 33(7):97-100. Ge Jiaqi, Jiang Yong, Wang Kehong. Microstructure characteristics and properties of steel to aluminum alloy made by covering filler metal brazing[J]. Transactions of the China Welding Institution, 2012, 33(7):97-100.
    [5] Liu X, Lan S, Ni J. Analysis of process parameters effects on friction stir welding of dissimilar aluminum alloy to advanced high strength steel[J]. Materials & Design, 2014(59):50-62.
    [6] 杨硕,林健,雷永平,等.预置间隙对铝/钢CMT接头强度与失效模式的影响[J].焊接学报, 2014, 35(6):5-8. Yang Suo, Lin Jian, Lei Yongping, et al. Influence of preset gap on strength and failure mode of steel/aluminum CMT joint[J]. Transactions of the China Welding Institution, 2014, 35(6):5-8.
    [7] Zhang W, Sun D, Han L, et al. Interfacial microstructure and mechanical property of resistance spot welded joint of high strength steel and aluminium alloy with 4047 AlSi12 interlayer[J]. Materials & Design, 2014(57):186-194.
    [8] Kobayashi S, Yakou T. Control of intermetallic compound layers at interface between steel and aluminum by diffusion-treatment[J]. Materials Science and Engineering A, 2002, 338(1):44-53.
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  • 收稿日期:  2014-10-08

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