钎焊温度对GH4169/AgCuTi+W/Si3N4的接头组织与力学性能的影响

薛阳 朱冬冬 陶锋 董多 王晓红 马腾飞

薛阳, 朱冬冬, 陶锋, 董多, 王晓红, 马腾飞. 钎焊温度对GH4169/AgCuTi+W/Si3N4的接头组织与力学性能的影响[J]. 航空材料学报, 2022, 42(6): 48-56. doi: 10.11868/j.issn.1005-5053.2022.000035
引用本文: 薛阳, 朱冬冬, 陶锋, 董多, 王晓红, 马腾飞. 钎焊温度对GH4169/AgCuTi+W/Si3N4的接头组织与力学性能的影响[J]. 航空材料学报, 2022, 42(6): 48-56. doi: 10.11868/j.issn.1005-5053.2022.000035
XUE Yang, ZHU Dongdong, TAO Feng, DONG Duo, WANG Xiaohong, MA Tengfei. Effect of brazing temperature on microstructure and mechanical properties of GH4169/AgCuTi+W/Si3N4 joint[J]. Journal of Aeronautical Materials, 2022, 42(6): 48-56. doi: 10.11868/j.issn.1005-5053.2022.000035
Citation: XUE Yang, ZHU Dongdong, TAO Feng, DONG Duo, WANG Xiaohong, MA Tengfei. Effect of brazing temperature on microstructure and mechanical properties of GH4169/AgCuTi+W/Si3N4 joint[J]. Journal of Aeronautical Materials, 2022, 42(6): 48-56. doi: 10.11868/j.issn.1005-5053.2022.000035

钎焊温度对GH4169/AgCuTi+W/Si3N4的接头组织与力学性能的影响

doi: 10.11868/j.issn.1005-5053.2022.000035
基金项目: 国家自然科学基金项目(52071188,52171120)
详细信息
    通讯作者:

    朱冬冬(1986—),男,博士,教授,主要从事TiAl合金相关研究,联系地址:浙江省衢州市衢州学院机械工程学院(324000),E-mail: zhudd8@163.com

  • 中图分类号: TG425+.2

Effect of brazing temperature on microstructure and mechanical properties of GH4169/AgCuTi+W/Si3N4 joint

  • 摘要: 采用高纯度W箔中间层复合AgCuTi活性钎料对镍基高温合金(GH4169)与Si3N4陶瓷进行连接,系统研究接头的微观界面结构以及钎焊温度对GH4169/Si3N4钎焊接头组织和力学性能的影响。结果表明:采用AgCuTi+W复合钎料可实现GH4169/Si3N4钎焊接头的有效连接,其接头组织成分为GH4169/TiNi3+TiCu+TiCu2+Ag(s, s)+Cu(s, s)+W+TiN+Ti5Si3/Si3N4;钎焊温度对接头组织和力学性能有显著影响。当钎焊温度较低时,液态钎料中的Ti元素扩散到陶瓷与钎料界面的较少,没有形成明显的反应层;当钎焊温度增加到880 ℃时,Ti元素富集在陶瓷侧反应生成厚度为2 μm的TiN和Ti5Si3反应层,此时接头的剪切强度最高,达到190.9 MPa。随着钎焊温度的升高,脆性化合物增多,使接头的力学性能大幅降低;断口结果表明在剪切过程中,裂纹在中间层萌生,后扩散至Si3N4陶瓷基体内,最终在Si3N4母材内发生断裂。

     

  • 图  1  镍基高温合金GH4169的组织形貌图

    Figure  1.  SEM of GH4169 Superalloy

    图  2  AgCuTi粉末钎料+W钎焊GH4169/Si3N4陶瓷摆放示意图

    Figure  2.  Assembly schematic of GH4169/Si3N4 brazing with AgCuTi braze and W foil

    图  3  钎焊工艺曲线图

    Figure  3.  Thermal cycling curve of brazing

    图  4  GH4169/Si3N4陶瓷的接头形貌图(880 ℃,15 min) (a)钎缝整体;(b)GH4169侧;(c)Si3N4

    Figure  4.  Microstructure of the GH4169/Si3N4 joint brazed at 880 ℃ for 15 min  (a) entire joint;(b)GH4169 side;(c)Si3N4 side

    图  5  GH4169/Si3N4接头的XRD图(880 ℃,15 min)

    Figure  5.  XRD pattern of GH4169/Si3N4 joint brazed at 880 ℃ for 15 min

    图  6  GH4169/Si3N4接头元素面扫结果(880 ℃,15 min) (a)SEM 图片;(b)~(i)EDS

    Figure  6.  Element distribution maps of GH4169/Si3N4 joint brazed at 880 ℃ for 15 min (a)SEM image;(b)-(i)EDS

    图  7  不同钎焊温度下保温15 min的GH4169/Si3N4接头钎缝组织形貌图

    Figure  7.  Microstructure of the GH4169/Si3N4 joint brazed at different temperatures for 15 min  (a)820 ℃;(b)850 ℃;(c)880 ℃;(d)910 ℃

    图  8  GH4169/Si3N4接头实物图 (a) 剪切样;(b) 金相样

    Figure  8.  Physical drawing of GH4169/Si3N4 joint  (a) shear sample;(b) metallographic sample

    图  9  钎焊温度对GH4169/Si3N4接头剪切强度的影响

    Figure  9.  Effect of brazing temperature on shear strength of brazed joint

    图  10  GH4169/Si3N4接头断口形貌(880 ℃,15 min) (a)合金侧断口形貌;(b)陶瓷侧断口形貌

    Figure  10.  Fracture morphology of GH4169/Si3N4 joints brazed at 880 ℃ for 10 min  (a)fracture morphology of GH4169 side;(b)fracture morphology of Si3N4 side

    表  1  GH4169高温合金的化学成分(质量分数/%)

    Table  1.   Chemical composition of GH4169 superalloy(mass fraction/%)

    NiCrNbMoTiAlSiFe
    Bal17.905.503.101.040.520.0618.00
    下载: 导出CSV

    表  2  图4各特征相的EDS分析结果(原子分数/%)

    Table  2.   EDS results for chemical compositions of different phase in Fig.4 (atom fraction/%)

    PositionNiCrFeAgCuTiSiNWPossible phases
    A7.548.038.8369.534.491.58Ag(s,s)
    B64.265.206.950.115.4018.09TiNi3
    C6.770.882.440.3349.5340.05TiCu
    D7.621.1410.630.1540.6324.83TiCu2
    E0.310.070.112.1797.100.24Cu(s,s)
    F3.261.422.6975.4916.091.06Ag(s,s)
    G0.460.180.8398.53W
    H2.5987.250.581.917.68Cu(s,s)
    I61.4211.050.491.5025.54Ag(s,s)
    J0.579.5156.4013.3920.14Ti5Si3+TiN
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-03-10
  • 修回日期:  2022-10-12
  • 网络出版日期:  2022-10-11
  • 刊出日期:  2022-12-02

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