金属热处理 ›› 2026, Vol. 51 ›› Issue (1): 195-200.DOI: 10.13251/j.issn.0254-6051.2026.01.028

• 工艺研究 • 上一篇    下一篇

淬火温度对20CrMnSi耐磨钢组织与硬度的影响

吴栋锐1,2, 呼陟宇1,2, 孟佳红3, 王海燕1,2, 邓想涛4, 袁晓鸣5, 李浩5   

  1. 1.内蒙古科技大学 材料科学与工程学院, 内蒙古 包头 014010;
    2.内蒙古自治区新金属材料重点实验室, 内蒙古 包头 014010;
    3.中国机械总院集团北京机电研究所有限公司, 北京 100083;
    4.东北大学 轧制及自动化国家重点实验室, 辽宁 沈阳 110819;
    5.内蒙古包钢钢联股份有限公司, 内蒙古 包头 014010
  • 收稿日期:2025-08-04 修回日期:2025-11-03 出版日期:2026-01-25 发布日期:2026-01-27
  • 通讯作者: 呼陟宇,讲师,博士,E-mail:hzy896@126.com
  • 作者简介:吴栋锐(1999—),男,硕士研究生,主要研究方向为低合金耐磨钢的热处理工艺,E-mail:wdr2365878@163.com。
  • 基金资助:
    国家自然科学基金(51961030);中央引导地方科技发展资金项目(2022ZY0072)

Effect of quenching temperature on microstructure and hardness of 20CrMnSi wear-resistant steel

Wu Dongrui1,2, Hu Zhiyu1,2, Meng Jiahong3, Wang Haiyan1,2, Deng Xiangtao4, Yuan Xiaoming5, Li Hao5   

  1. 1. School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China;
    2. China Inner Mongolia Key Laboratory of New Metal Material, Baotou Inner Mongolia 014010, China;
    3. China Academy of Machinery Beijing Research Institute of Mechanical & Electrical Technology Co., Ltd., Beijing 100083, China;
    4. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang Liaoning 110819, China;
    5. Inner Mongolia Baotou Steel Union Co., Ltd., Baotou Inner Mongolia 014010, China
  • Received:2025-08-04 Revised:2025-11-03 Online:2026-01-25 Published:2026-01-27

摘要: 通过扫描电镜、电子背散射衍射、硬度测试等研究了淬火温度对低合金耐磨钢板20CrMnSi显微组织与硬度的影响。结果表明,试验钢经850~1000 ℃淬火后的组织均为马氏体,随着淬火温度的升高,马氏体板条宽度以及板条块大小逐渐增大,硬度呈现先上升后下降的趋势,在950 ℃淬火时硬度达到最大值539 HV3。硬度的变化与晶粒尺寸、晶粒长径比及位错密度密切相关,在950 ℃淬火时,代表内部位错密度的KAM平均值最高。

关键词: 耐磨钢, 淬火温度, 显微组织, 硬度

Abstract: Effect of quenching temperature on microstructure and hardness of low-alloy wear-resistant steel 20CrMnSi was investigated by means of SEM, EBSD and hardness test. The results show that after quenching at 850-1000 ℃, the microstructure of the steel predominantly consists of martensite. As the quenching temperature increases, both the width of martensite laths and the size of lath packets gradually increase, but the hardness increases first and then decreases, reaching a maximum value of 539 HV3 at 950 ℃. The variation in hardness is closely correlated with the grain size, grain aspect ratio, and dislocation density. After quenching at 950 ℃, the average KAM value is the highest, which also represents the higher internal dislocation density.

Key words: wear-resistant steel, quenching temperature, microstructure, hardness

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