不同热处理工艺对K4169高温合金组织和力学性能的影响

李妍佳 柳瑞 何金珊 胡聘聘 汤鑫 王西涛 肖程波

李妍佳, 柳瑞, 何金珊, 胡聘聘, 汤鑫, 王西涛, 肖程波. 不同热处理工艺对K4169高温合金组织和力学性能的影响[J]. 航空材料学报, 2021, 41(4): 119-127. doi: 10.11868/j.issn.1005-5053.2021.000030
引用本文: 李妍佳, 柳瑞, 何金珊, 胡聘聘, 汤鑫, 王西涛, 肖程波. 不同热处理工艺对K4169高温合金组织和力学性能的影响[J]. 航空材料学报, 2021, 41(4): 119-127. doi: 10.11868/j.issn.1005-5053.2021.000030
LI Yanjia, LIU Rui, HE Jinshan, HU Pinpin, TANG Xin, WANG Xitao, XIAO Chengbo. Effect of different heat treatment processes on microstructure and mechanical properties of K4169 superalloy[J]. Journal of Aeronautical Materials, 2021, 41(4): 119-127. doi: 10.11868/j.issn.1005-5053.2021.000030
Citation: LI Yanjia, LIU Rui, HE Jinshan, HU Pinpin, TANG Xin, WANG Xitao, XIAO Chengbo. Effect of different heat treatment processes on microstructure and mechanical properties of K4169 superalloy[J]. Journal of Aeronautical Materials, 2021, 41(4): 119-127. doi: 10.11868/j.issn.1005-5053.2021.000030

不同热处理工艺对K4169高温合金组织和力学性能的影响

doi: 10.11868/j.issn.1005-5053.2021.000030
详细信息
    通讯作者:

    何金珊(1989—),女,博士,特聘副研究员,研究方向为高温合金及先进钢铁材料,联系地址:北京市海淀区学院路30号(100083),E-mail:hejinshan@ustb.edu.cn

    胡聘聘(1985—),男,硕士,高级工程师,研究方向为铸造高温合金,联系地址:北京市81信箱1分箱(100095),E-mail:pinpin.hu@biam.ac.cn

  • 中图分类号: TG146.1;TG156

Effect of different heat treatment processes on microstructure and mechanical properties of K4169 superalloy

  • 摘要: 对比研究标准热处理(SHT)、热等静压+标准热处理(HIP+SHT)以及热等静压+无均匀化热处理(HIP+HTWH)后K4169合金的组织和力学性能,分析K4169合金HIP后进行无均匀化热处理的可行性,提出了一种适用于热等静压K4169合金的热处理制度。组织研究表明:热等静压处理(1170 ℃/140 MPa/4 h)可以基本消除枝晶间Laves相和δ相;而与HIP+SHT试样相比,无均匀化热处理的试样(HIP+HTWH)晶界上析出了不连续短棒状δ相,但没有对组织的均匀性产生实质影响。力学性能研究表明:相比SHT态,HIP+SHT与HIP+HTWH态合金的室温屈服强度分别提升了73 MPa和91 MPa,持久寿命(704 ℃/448 MPa)分别提升了35%和32%;虽HIP+HTWH态合金的持久寿命和塑性分散度大于HIP+SHT态,但仍能满足AMS5383对K4169合金力学性能的要求。综合考虑工艺成本的降低、生产效率的提高和力学性能的改善等多种因素,可以确定对于K4169合金结构件而言,HIP+HTWH热处理工艺具有实际应用的潜力。

     

  • 图  1  不同热处理态下K4169合金的金相照片(1)经侵蚀;(2)未经侵蚀; (a)H1;(b)H2;(c)H3

    Figure  1.  Metallographic photos of different heat-treated K4169 alloys(1)etched;(2)unetched; (a)H1;(b)H2;(c)H3

    图  2  不同热处理态K4169合金的宏观金相和SEM图(1)金相照片;(2)SEM照片; (a)H1;(b)H2;(c)H3

    Figure  2.  OM and SEM images of different heat-treated K4169 alloys(1)OM images;(2)SEM images; (a)H1;(b)H2;(c)H3

    图  3  不同热处理态K4169合金晶界处的SEM图

    Figure  3.  SEM images of grain boundaries for different heat-treated K4169 alloys (a)H2;(b)H3

    图  4  不同热处理态K4169合金中γ'、γ''相形貌和两相平均尺寸 (a)H1;(b)H2;(c)H3;(d)γ''相和γ'相的平均尺寸

    Figure  4.  SEM images of γ',γ'' and the mean size of γ'' and γ' of different heat-treat K4169 alloys (a)H1;(b)H2;(c)H3;(d)mean size of γ'' and γ'

    图  5  不同热处理态K4169合金(1)TEM图;(2)γ''相SAED花样 (a)H1;(b)H2;(c)H3

    Figure  5.  K4169 alloy under different heat treatment states(1)TEM images;(2)SAED pattern of γ'' phase; (a)H1;(b)H2;(c)H3

    图  6  不同热处理态K4169合金的洛氏硬度值

    Figure  6.  Rockwell hardness of different heat-treated K4169 alloys

    图  7  不同热处理态K4169合金的室温拉伸性能

    Figure  7.  Tensile properties of different heat-treated K4169 alloys at room temperature

    图  8  不同热处理态K4169合金704 ℃/448 MPa持久性能

    Figure  8.  Stress-rupture properties of different heat-treated K4169 alloys at 704 ℃/448 MPa

    表  1  K4169合金的化学成分(质量分数/%)

    Table  1.   Chemical composition of K4169 alloy(mass fraction/%)

    FeNiCrMoNbCTiAl
    Bal53.218.833.064.940.0400.960.58
    下载: 导出CSV

    表  2  K4169合金的热处理方案

    Table  2.   Heat treatment of K4169 alloy

    NoConditionHeat treatment
    H1SHT1093 ℃/1.5 h,AC +968 ℃/1.5 h,AC +718 ℃/8 h,FC(56 ℃/h)→621 ℃/8 h,AC
    H2HIP+SHT1170 ℃/140 MPa/4 h,FC+1093 ℃/1.5 h,AC +968 ℃/1.5 h,AC +718 ℃/8 h,FC(56 ℃/1 h)→621 ℃/8 h,AC
    H3HIP+HTWH1170 ℃/140 MPa/4 h,FC +968 ℃/1.5 h,AC +718 ℃/8 h,FC(56 ℃/1 h)→621 ℃/8 h,AC
    下载: 导出CSV

    表  3  不同热处理态合金中析出相的能谱分析结果(原子分数/%)

    Table  3.   EDS results of precipitates in different heat-treated alloys(atom fraction/%)

    SamplePhaseMoTiCrFeNiNbAl
    H11#1.552.0315.0213.3058.528.610.97
    2#-Laves2.512.953.8261.1829.34
    3#-(Nb,Ti)C13.451.480.852.8681.490.10
    H24#-(Nb,Ti)C0.7014.171.681.323.3078.82
    H35#-(Nb,Ti)C1.7412.621.020.742.0181.67
    6#2.131.1220.1517.5253.024.80
    下载: 导出CSV

    表  4  不同热处理态试样室温拉伸性能

    Table  4.   Tensile properties of different heat-treated alloys at room temperature

    Heat treatmentTensile strength/MPaYield strength at 0.2% offset/MPaElongation in 4D/%Reduction of area/%
    AMS5383≥ 862≥ 758≥ 5≥ 10
    H1106482124.628.6
    H2107489425.437.5
    H3108291227.834.6
    下载: 导出CSV

    表  5  不同热处理态试样704 ℃/448 MPa条件下的持久性能

    Table  5.   Stress-rupture properties of different heat-treated alloys at 704 ℃/448 MPa

    Heat treatmentStress-rupture life/hElongation in 4D/%
    AMS5383 ≥ 23 ≥ 3
    H13297.8
    H24276.5
    H34195.7
    下载: 导出CSV
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  • 收稿日期:  2021-02-24
  • 修回日期:  2021-04-13
  • 网络出版日期:  2021-08-26
  • 刊出日期:  2021-08-01

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