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碳微合金化对Ti-4.5Al-3.5Zr-2Fe低成本钛合金组织及力学性能的影响

王安东 王志天 相志磊 韩竟俞 周宗熠 申高亮 黄景存 陈子勇

王安东, 王志天, 相志磊, 韩竟俞, 周宗熠, 申高亮, 黄景存, 陈子勇. 碳微合金化对Ti-4.5Al-3.5Zr-2Fe低成本钛合金组织及力学性能的影响[J]. 钢铁钒钛, 2022, 43(6): 71-77. doi: 10.7513/j.issn.1004-7638.2022.06.011
引用本文: 王安东, 王志天, 相志磊, 韩竟俞, 周宗熠, 申高亮, 黄景存, 陈子勇. 碳微合金化对Ti-4.5Al-3.5Zr-2Fe低成本钛合金组织及力学性能的影响[J]. 钢铁钒钛, 2022, 43(6): 71-77. doi: 10.7513/j.issn.1004-7638.2022.06.011
Wang Andong, Wang Zhitian, Xiang Zhilei, Han Jingyu, Zhou Zongyi, Shen Gaoliang, Huang Jingcun, Chen Ziyong. Effects of carbon microalloying on microstructure and mechanical properties of low-cost Ti-4.5Al-3.5Zr-2Fe titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 71-77. doi: 10.7513/j.issn.1004-7638.2022.06.011
Citation: Wang Andong, Wang Zhitian, Xiang Zhilei, Han Jingyu, Zhou Zongyi, Shen Gaoliang, Huang Jingcun, Chen Ziyong. Effects of carbon microalloying on microstructure and mechanical properties of low-cost Ti-4.5Al-3.5Zr-2Fe titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 71-77. doi: 10.7513/j.issn.1004-7638.2022.06.011

碳微合金化对Ti-4.5Al-3.5Zr-2Fe低成本钛合金组织及力学性能的影响

doi: 10.7513/j.issn.1004-7638.2022.06.011
基金项目: 企事业单位委托科技项目(46009011201501 )
详细信息
    作者简介:

    王安东,1999年出生,男,山东聊城人,硕士研究生,研究方向:低成本钛合金制备及加工工艺,E-mail:wang1807938507@163.com

    通讯作者:

    陈子勇,1966年出生,博士,教授,研究方向:轻质耐高温难变形结构材料,超高强韧铝合金及其复合材料制备,E-mail:czy@bjut.edu.cn

  • 中图分类号: TF823,TG146.2

Effects of carbon microalloying on microstructure and mechanical properties of low-cost Ti-4.5Al-3.5Zr-2Fe titanium alloy

  • 摘要: 采用水冷铜坩埚真空感应悬浮熔炼炉制备了不同碳含量为0、0.1%、0.15%和0.3%的Ti-4.5Al-3.5Zr-2Fe低成本钛合金,研究了碳微合金化对钛合金铸态组织和力学性能的影响。结果表明:随着碳元素的引入,原始β晶粒以及α片层宽度尺寸有一定的细化,合金铸态凝固组织由魏氏组织逐渐转变为网篮组织,TiC在晶界析出。碳含量增加,合金强度增强,塑性降低,其中Ti-4.5Al-3.5Zr-2Fe-0.1C合金综合力学性能最佳,抗拉强度和屈服强度分别为 979 MPa 和 920 MPa,延伸率为 5.4%。
  • 图  1  Ti-C二元合金相图

    Figure  1.  Phase diagrams of the Ti-C binary alloy

    图  2  钛合金的 DDSC 曲线

    Figure  2.  DDSC curves of the titanium alloys

    图  3  铸态合金 XRD 图谱

    Figure  3.  XRD patterns of the as-cast alloys

    图  4  铸态合金TEM组织

    Figure  4.  TEM images of the as-cast alloy

    图  5  铸态合金元素分布

    Figure  5.  Elemental mapping of the as-cast alloy

    图  6  铸态合金中TiC形貌及分布

    (a) TAZF-0.1C;(b) TAZF-0.15C;(c) TAZF-0.3C

    Figure  6.  Morphology and distribution of TiC in the as-cast alloys

    图  7  铸态合金微观组织

    (a) TAZF ;(b) TAZF-0.1C ;(c) TAZF-0.15C ;(d) TAZF-0.3C

    Figure  7.  Microstructures of the as-cast alloys

    图  8  铸态合金应力应变曲线

    Figure  8.  Stress-strain curves of the as-cast titanium alloy

    图  9  铸态合金的拉伸断口形貌

    (a) TAZF;(b) TAZF-0.1C;(c) TAZF-0.15C;(d) TAZF-0.3C

    Figure  9.  Tensile fracture morphologies of the as-cast alloys

    表  1  合金实际成分

    Table  1.   Chemical compositions of the alloys %

    TiAlZrFeCHON
    TAZFBal.4.583.622.0100.00450.0360.005
    TAZF-0.1CBal.4.663.51.980.110.00330.0870.056
    TAZF-0.15CBal.4.583.541.720.150.0030.0720.0045
    TAZF-0.3CBal.4.783.492.140.310.00520.0880.0054
    下载: 导出CSV

    表  2  铸态合金室温力学性能

    Table  2.   Mechanical properties of the as-cast alloys at RT

    合金σs/MPaσ0.2/MPaEl/%
    TAZF881.6811.56.9
    TAZF-0.1C9799205.4
    TAZF-0.15C1005.79303.8
    TAZF-0.3C103610031.3
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-05-04
  • 刊出日期:  2023-01-13

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