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铸态Mn18Cr18N钢多道次轧制和热处理影响研究

刘洁 李娟

刘洁, 李娟. 铸态Mn18Cr18N钢多道次轧制和热处理影响研究[J]. 钢铁钒钛, 2022, 43(6): 180-184. doi: 10.7513/j.issn.1004-7638.2022.06.027
引用本文: 刘洁, 李娟. 铸态Mn18Cr18N钢多道次轧制和热处理影响研究[J]. 钢铁钒钛, 2022, 43(6): 180-184. doi: 10.7513/j.issn.1004-7638.2022.06.027
Liu Jie, Li Juan. Research on effects of multi-pass rolling and heat treatment of cast Mn18Cr18N steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 180-184. doi: 10.7513/j.issn.1004-7638.2022.06.027
Citation: Liu Jie, Li Juan. Research on effects of multi-pass rolling and heat treatment of cast Mn18Cr18N steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 180-184. doi: 10.7513/j.issn.1004-7638.2022.06.027

铸态Mn18Cr18N钢多道次轧制和热处理影响研究

doi: 10.7513/j.issn.1004-7638.2022.06.027
基金项目: 山西省教育科学“十四五”规划项目(GH-22010)。
详细信息
    作者简介:

    刘洁,1987年出生,女,山西晋中人,硕士研究生,讲师,主要研究方向: 材料加工工程,E-mail: 429842384@qq.com

  • 中图分类号: TG335.8

Research on effects of multi-pass rolling and heat treatment of cast Mn18Cr18N steel

  • 摘要: 对Mn18Cr18N电渣重熔钢进行三道次和五道次的轧制及固溶处理。借助电子背散射仪(EBSD)观察微观组织,发现随着轧制道次的增加,再结晶晶粒沿着晶界生长,呈现项链状分布,大角度晶界向小角度晶界逐渐迁移后趋于稳定,并出现大量剪切变形带,结果表明,较大的单道次压下量或较高的终轧温度有利于轧制后的Mn18Cr18N铸态奥氏体不锈钢再结晶。固溶处理后,发现晶粒细化并长大,退火孪晶增多,组织主要发生静态再结晶。对Mn18Cr18N钢进行力学性能测试,发现随着轧制道次的增加,抗拉强度由950 MPa增加至1 090 MPa,屈服强度增加,断后伸长率由43.46%降至29.55%,塑性降低;相应试样固溶处理后,抗拉强度由904 MPa降至870 MPa,屈服强度降低,断后伸长率由42%升高到48%,塑性提高,结果表明固溶处理改善了材料的组织和性能。
  • 图  1  不同状态下 Mn18Cr18N 钢的IPF图

    黑色线为>15°大角度晶界,红色线为2~15°的小角度晶界

    Figure  1.  IPF diagrams of Mn18Cr18N steel under different states

    图  2  不同状态下 Mn18Cr18N 钢的取向差分布

    Figure  2.  Grain boundary orientation distribution maps of Mn18Cr18N steel under different states

    图  3  Mn18Cr18N 钢对应的晶粒尺寸和与其IPF图

    (a) 三道次,轧制;(b)、(c)三道次,固溶状态;(d) 五道次,轧制;(e)(f)五道次,固溶状态

    Figure  3.  The corresponding grain size and IPF maps of Mn18Cr18N steel under different conditions

    图  4  Mn18Cr18N 钢轧制及固溶后再结晶比例统计

    Figure  4.  Recrystallization ratio of Mn18Cr18N steel under different conditions

    图  5  Mn18Cr18N钢在不同压下率的力学性能

    Figure  5.  Mechanical properties of Mn18Cr18N steel at different reduction rates

    表  1  Mn18Cr18N 钢的化学成分

    Table  1.   Chemical composition of Mn18Cr18N steel %

    MnSiNiCrMoAlNTiFe
    19.30.60.220.10.020.030.60.016其他
    下载: 导出CSV

    表  2  Mn18Cr18N 钢在不同状态下的抗拉强度、屈服强度和断后伸长率

    Table  2.   Tensile strength, yield strength and total elongation of Mn18Cr18N steel obtained under different states

    轧制后固溶后
    抗拉强度/
    MPa
    屈服强度/
    MPa
    断后伸长率/%抗拉强度
    /MPa
    屈服强度
    /MPa
    断后伸长率
    /%
    三道次95086443.4690457942
    五道次1090101529.5587053348
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-02-28
  • 刊出日期:  2023-01-13

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