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冷轧辊用半高速钢碳化物细化工艺技术研究

林发驹 李雄 吴铖川

林发驹, 李雄, 吴铖川. 冷轧辊用半高速钢碳化物细化工艺技术研究[J]. 钢铁钒钛, 2021, 42(3): 162-171. doi: 10.7513/j.issn.1004-7638.2021.03.025
引用本文: 林发驹, 李雄, 吴铖川. 冷轧辊用半高速钢碳化物细化工艺技术研究[J]. 钢铁钒钛, 2021, 42(3): 162-171. doi: 10.7513/j.issn.1004-7638.2021.03.025
Lin Faju, Li Xiong, Wu Chengchuan. Study on the carbide refining technology of semi high speed steel for cold roller[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 162-171. doi: 10.7513/j.issn.1004-7638.2021.03.025
Citation: Lin Faju, Li Xiong, Wu Chengchuan. Study on the carbide refining technology of semi high speed steel for cold roller[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 162-171. doi: 10.7513/j.issn.1004-7638.2021.03.025

冷轧辊用半高速钢碳化物细化工艺技术研究

doi: 10.7513/j.issn.1004-7638.2021.03.025
详细信息
    作者简介:

    林发驹(1985—),男,海南儋州人,本科,工程师,主要从事钢铁材料及锻造工艺研究工作,E-mail:3160094502qq.com

  • 中图分类号: TF76,TG304

Study on the carbide refining technology of semi high speed steel for cold roller

  • 摘要: 基于Thermo-Calc热力学软件计算及原位观察结果,开展冷轧辊半高速钢95Cr5MoV碳化物细化技术研究。95Cr5MoV半高速钢平衡凝固碳化物类型主要有MC、M7C3和M23C6,其中M23C6型碳化物在785 ℃左右完全溶入基体,M7C3型碳化物在1100 ℃时完全溶入基体,MC型碳化物在1170 ℃左右完全溶入基体;采用高温共聚焦显微镜试验观察发现,大块状MC型碳化物在960 ℃时开始溶解,当温度升高到1170 ℃左右时,溶解加速,但一直到1217 ℃碳化物周围的基体开始局部熔化时仍然部分存在,表明非平衡态的溶解温度高于平衡态。为细化碳化物,实验室采用“1100 ℃高温固溶+880 ℃三次循环+740 ℃退火”的新热处理工艺后,大块液析碳化物尺寸明显减小,且组织均匀性好,并在工业化生产中验证了该工艺的可靠性。
  • 图  1  加热工艺曲线

    Figure  1.  Heating process curve

    图  2  Thermo-calc计算95Cr5MoV钢的平衡态的性质及碳化物相中组元含量

    Figure  2.  Thermocalc calculation of equilibrium properties and component content in carbide phase of 95Cr5MoV steel

    图  3  Thermo-calc计算95Cr5MoV钢的非平衡态的相图

    Figure  3.  Thermocalc calculation of non-equilibrium phase diagram of 95Cr5MoV steel

    图  4  试样A 扫描电镜光谱分析

    Figure  4.  SEM spectrum analysis of sample A

    图  5  试样B 扫描电镜光谱分析

    Figure  5.  SEM spectrum analysis of sample B

    图  6  碳化物随加热温度变化规律

    Figure  6.  Variation of carbides with heating temperature

    图  7  不同固溶温度的晶粒度

    Figure  7.  Grain size of different solution temperature

    图  8  95Cr5MoV钢试样经1100 ℃+880 ℃循环不同次数+740 ℃回火后的碳化物

    Figure  8.  Carbide tempered by 1100 ℃ +880 ℃ cycles of 95Cr5MoV steel samples at different times +740 ℃

    图  9  热处理工艺曲线

    Figure  9.  Heat treatment process curve

    图  10  辊坯热处理前后的金相组织 ×500

    Figure  10.  Metallographic structure of roll blank before and after heat treatment × 500

    表  1  95Cr5MoV主要化学成分

    Table  1.   Main chemical compositions of 95Cr5MoV %

    CMnSiPSCrMoNiVAl
    0.950.440.500.0080.0054.51.220.350.850.045
    下载: 导出CSV

    表  2  试验方案及晶粒度检测结果

    Table  2.   Test scheme and grain size

    序号加热温度 /
    保温时间 /
    min
    平均晶粒度/
    冷却方式
    a1050606.5油冷
    b1100604.0
    c1150600.5
    下载: 导出CSV
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  • 收稿日期:  2021-04-09
  • 刊出日期:  2021-06-10

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