第三代镍基单晶高温合金大间隙钎焊接头的微观组织和力学性能

李可馨 侯星宇 王诗洋 孙元 陈立佳 程陆凡 王振江 李寒松 汤广全

李可馨, 侯星宇, 王诗洋, 孙元, 陈立佳, 程陆凡, 王振江, 李寒松, 汤广全. 第三代镍基单晶高温合金大间隙钎焊接头的微观组织和力学性能[J]. 航空材料学报, 2021, 41(5): 78-85. doi: 10.11868/j.issn.1005-5053.2021.000035
引用本文: 李可馨, 侯星宇, 王诗洋, 孙元, 陈立佳, 程陆凡, 王振江, 李寒松, 汤广全. 第三代镍基单晶高温合金大间隙钎焊接头的微观组织和力学性能[J]. 航空材料学报, 2021, 41(5): 78-85. doi: 10.11868/j.issn.1005-5053.2021.000035
LI Kexin, HOU Xingyu, WANG Shiyang, SUN Yuan, CHEN Lijia, CHENG Lufan, WANG Zhenjiang, LI Hansong, TANG Guangquan. Microstructure and mechanical properties of wide gap brazing joint of the third-generation nickel-based single crystal superalloy[J]. Journal of Aeronautical Materials, 2021, 41(5): 78-85. doi: 10.11868/j.issn.1005-5053.2021.000035
Citation: LI Kexin, HOU Xingyu, WANG Shiyang, SUN Yuan, CHEN Lijia, CHENG Lufan, WANG Zhenjiang, LI Hansong, TANG Guangquan. Microstructure and mechanical properties of wide gap brazing joint of the third-generation nickel-based single crystal superalloy[J]. Journal of Aeronautical Materials, 2021, 41(5): 78-85. doi: 10.11868/j.issn.1005-5053.2021.000035

第三代镍基单晶高温合金大间隙钎焊接头的微观组织和力学性能

doi: 10.11868/j.issn.1005-5053.2021.000035
基金项目: 国家自然科学基金青年项目(51801206);国家科技重大专项项目.(J2019-VI-0018-0133)
详细信息
    通讯作者:

    孙元(1980—),女,博士,副研究员,主要从事高温合金制备、焊接及组织与性能演化规律研究,E-mail:yuansun@imr.ac.cn

  • 中图分类号: TG454

Microstructure and mechanical properties of wide gap brazing joint of the third-generation nickel-based single crystal superalloy

  • 摘要: 采用混合粉末钎料钎焊第三代含铼单晶高温合金,其中混合粉末钎料是利用球磨混粉方法将一种镍基粉末钎料和母材成分相同的高温合金粉混合制成。利用SEM和EPMA分析镍基钎料与高温合金粉配比对接头微观组织的影响,并对四种钎料的钎焊接头进行高温持久性能测试。结果表明:采用镍基钎料的焊缝和混合粉末钎料的焊缝中均存在γ-Ni、γ′、γ+γ′共晶、CrB、Ni3B以及M3B2型硼化物,但混合粉末钎料的残留为熔化的球型高温合金;保持焊缝间隙不变,提高混合粉末钎料中高温合金粉末的配比,可以抑制焊缝中M3B2型硼化物和低熔点相的析出,且硼化物的分布变得更均匀,尺寸变得更小,提高了焊缝成分和组织的均匀性;3种接头的高温持久性能均优于纯钎料接头,当提升合金粉的比例由0%至50%时,接头的持久寿命由15 min提升至34 h,但当合金粉比例增加至60%时,接头中产生大量孔洞缺陷,导致持久寿命下降至4 h。

     

  • 图  1  JSNi-3钎料钎焊接头中各析出相的BSE图 (a)M3B2型硼化物和CrB;(b)γ-Ni+Ni3B+CrB三元共晶组织和γ+γ′共晶

    Figure  1.  Back scattered electron(BSE)images of each phase in joint of JSNi-3 (a)M3B2 and CrB boride;(b)γ-Ni+Ni3B+CrB ternary eutectic phase and γ+γ′ eutectic

    图  2  JSNi-3钎料钎焊接头组织中各析出相的XRD图谱

    Figure  2.  XRD patterns of each phase in joint of JSNi-3

    图  3  混合钎料钎焊三代镍基单晶高温合金接头的SEM图 (a),(b)JSNi-1接头;(c),(d)JSNi-2接头;(e),(f)JSNi-3接头;(g),(h)JSNi-4接头

    Figure  3.  SEM images of joint of the 3rd generation nickel-based single crystal superalloy with mixed powder filler (a),(b)JSNi-1;(c),(d)JSNi-2;(e),(f)JSNi-3;(g),(h)JSNi-4

    图  4  JSNi-1、JSNi-2、JSNi-3和JSNi-4接头在980 ℃/100 MPa下持久断口形貌及各接头的持久寿命 (a)JSNi-1;(b)JSNi-2;(c)JSNi-3;(d)JSNi-4;(e)各接头的持久寿命

    Figure  4.  Rupture fracture morphologies of JSNi-1,JSNi-2,JSNi-3 and JSNi-4 joints at 980 ℃/100 MPa and stress rupture life of joints (a)JSNi-1;(b)JSNi-2;(c)JSNi-3;(d)JSNi-4;(e)stress rupture life of joints

    图  5  60% 合金粉混合钎料(JSNi-4)接头缺陷形成机理 (a) 室温;(b)1200 ℃;(c)保温阶段;(d)降温阶段

    Figure  5.  Mechanism of defect formation in joint of mixed filler with 60% superalloy powder (a) room temperature;(b)1200 ℃;(c) holding stage;(d)cooling stage

    表  1  第三代镍基单晶高温合金与镍基钎料的成分(质量分数/%)

    Table  1.   Compositions of the 3rd generation nickel-based single crystal superalloy and Ni-based filler alloy(mass fraction/%)

    MaterialCoCrWMoAlTi+ SiBReNi
    3rd single crystal superalloy8-107-94-70-25-70.3-22-5Bal
    JSSNi60A5-106-122-62-52-50.9-60.2-2.0Bal
    下载: 导出CSV

    表  2  混合粉末钎料的成分配比

    Table  2.   Composition ratio of the mixed powder filler alloy

    MaterialRatio of mixed powder filler alloy (mass fraction/%)
    JSNi-1100%JSSNi60A
    JSNi-270%JSSNi60A+30% alloy powder
    JSNi-350%JSSNi60A+50% alloy powder
    JSNi-440%JSSNi60A+60% alloy powder
    下载: 导出CSV

    表  3  JSNi-3钎料钎焊接头组织中各析出相的电子探针(EPMA)成分(原子分数/%)

    Table  3.   Results of electron microprobe analysis(EPMA)of each phase in joint of JSNi-3 (atomic fraction/%)

    PhaseBAlNiCoCrWTaMoTiSi
    M3B2 42.1 14.6 5.5 17.7 14.9 1.1 3.2 0.9
    CrB 31.5 6.3 4.3 40.6 7.6 1.5 6.8 1.4
    Ni3B 13.4 2.1 52.6 8.9 8.6 4.2 2 5.6 2.6
    γ+γ′ 9.3 62.4 8.9 10.2 2.1 1.5 3.2 2.4
    γ-Ni 7.2 62.9 10.5 12.5 2.8 1.3 1.6 1.2
    下载: 导出CSV

    表  4  JSNi-2接头断口成分分析(原子分数/%)

    Table  4.   Results of EDS of lumps in fracture morphology of JSNi-2 joint(atomic fraction / %)

    PositionCOTiCoCrNiTaMoWSiAl
    Massive structure7.0632.760.4515.85 2.26 6.518.753.3722.99
    Base metal4.2321.470.48 8.1010.0740.013.971.102.847.73
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-03-04
  • 修回日期:  2021-04-06
  • 刊出日期:  2021-10-20

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