金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 15-19.DOI: 10.13251/j.issn.0254-6051.2022.07.003

• 工艺研究 • 上一篇    下一篇

分级淬火对高铬铸铁轧辊组织的影响

张博涵1,2, 李浩楠3, 高鹏冲4, 乔桂英3, 刘杰兵4, 肖福仁1,2   

  1. 1.燕山大学 材料科学与工程学院 亚稳材料科学与制备技术国家重点实验室, 河北 秦皇岛 066004;
    2.燕山大学 材料科学与工程学院 河北省金属产品工艺与性能优化重点实验室, 河北 秦皇岛 066004;
    3.燕山大学 环境与化学工程学院 河北省应用化学重点实验室, 河北 秦皇岛 066004;
    4.邢台德龙机械轧辊有限公司 河北省轧辊绿色制造技术创新中心, 河北 邢台 054009
  • 收稿日期:2022-01-25 修回日期:2022-05-06 出版日期:2022-07-25 发布日期:2022-08-12
  • 通讯作者: 肖福仁(1966—),男,教授,博士,主要研究方向为微合金钢,E-mail: frxiao@ysu.edu.cn
  • 作者简介:张博涵(1994—),男,博士研究生,主要研究方向为大型铸锻件,E-mail:yiqingxin130@163.com。
  • 基金资助:
    国家自然科学基金面上项目(51971198);河北省自然科学基金高端钢铁冶金联合研究基金(E2019203381)

Effect of step quenching process on microstructure of high-Cr cast iron roll

Zhang Bohan1,2, Li Haonan3, Gao Pengchong4, Qiao Guiying3, Liu Jiebing4, Xiao Furen1,2   

  1. 1. Key Lab of Metastable Materials Science & Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao Hebei 066004, China;
    2. Hebei Key Lab for Optimizing Metal Product Technology and Performance, College of Materials Science and Engineering, Yanshan University, Qinhuangdao Hebei 066004, China;
    3. Key Lab of Applied Chemistry of Hebei Province, School of Environment and Chemical Engineering, Yanshan University, Qinhuangdao Hebei 066004, China;
    4. Hebei Technology Innovation Centre for Roller Green Manufacturing, Xingtai Delong Machinery & Mill Roll Co., Ltd., Xingtai Hebei 054009, China
  • Received:2022-01-25 Revised:2022-05-06 Online:2022-07-25 Published:2022-08-12

摘要: 采用LINSEIS L78膨胀仪模拟了高铬铸铁轧辊的分级淬火冷却过程,采用膨胀法、光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)等方法研究了分级淬火温度对Ms点及室温组织和硬度的影响。结果表明,分级淬火对淬火冷却过程发生的相变影响不大;与直接淬火相比,分级淬火降低了Ms点,而且Ms点随分级淬火温度的降低而降低;当分级温度为560 ℃时,Ms点降低程度不大,淬火后硬度升高到62.1 HRC,而且经450~500 ℃回火后,硬度进一步升高到64.5 HRC。

关键词: 轧辊, 高铬铸铁, 分级淬火, Ms点, 组织

Abstract: Step quenching process of high chromium cast iron roller was simulated by using LINSEIS L78 dilatometer. The effect of step quenching temperature on Ms point, microstructure and hardness was studied by means of thermal dilation, optical microscopy(OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that the step quenching has little effect on the phase transformation during step quenching process, but it reduces the Ms point comparing with the direct quenching, and the Ms point decreases with the decrease of step quenching temperature. As the step quenching temperature is 560 ℃, the Ms point decreases a little, while the hardness increases to 62.1 HRC. Moreover, the hardness further increases to 64.5 HRC after tempering at 450-500 ℃.

Key words: roll, high-Cr cast iron, step quenching, Ms point, microstructure

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