金属热处理 ›› 2024, Vol. 49 ›› Issue (8): 170-173.DOI: 10.13251/j.issn.0254-6051.2024.08.029

• 工艺研究 • 上一篇    下一篇

淬火温度对4Cr4Mo3W2V1模具钢组织与硬度的影响

刘梓峰1, 赵旭亮2, 罗皓3   

  1. 1.中国石油大学(北京) 机械与储运工程学院, 北京 102249;
    2.中国石油大学(北京)克拉玛依校区 工学院, 新疆 克拉玛依 834000;
    3.中海石油(中国)有限公司 天津分公司, 天津 300450
  • 收稿日期:2024-01-26 修回日期:2024-06-18 出版日期:2024-08-25 发布日期:2024-09-27
  • 通讯作者: 赵旭亮,副教授,博士,E-mail:mukcliu@126.com
  • 作者简介:刘梓峰(1989—),男,讲师,博士,主要研究方向为钢的组织性能,E-mail:liuzifeng@cupk.edu.cn。
  • 基金资助:
    中国石油大学(北京)克拉玛依校区科研项目(XQZX20220018)

Effect of quenching temperature on microstructure and hardness of 4Cr4Mo3W2V1 die steel

Liu Zifeng1, Zhao Xuliang2, Luo Hao3   

  1. 1. College of Mechanical and Transportation Engineering, China University of Petroleum (Beijing), Beijing 102249, China;
    2. School of Engineering, China University of Petroleum (Beijing) at Karamay, Karamay Xinjiang 834000, China;
    3. Tianjin Branch, CNOOC (China Co., Ltd., Tianjin 300450, China
  • Received:2024-01-26 Revised:2024-06-18 Online:2024-08-25 Published:2024-09-27

摘要: 采用OM、SEM、洛氏硬度计等方法,研究了温度淬火(990~1070 ℃)对4Cr4Mo3W2V1模具钢微观组织与硬度的影响。结果表明,淬火态4Cr4Mo3W2V1钢的组织主要为马氏体、贝氏体以及未溶碳化物。随着淬火温度的升高,4Cr4Mo3W2V1钢的晶粒尺寸不断增加,组织中碳化物数量不断减少,硬度先升高后降低。1050 ℃淬火时,4Cr4Mo3W2V1钢组织中碳化物基本溶入基体,碳化物体积分数为0.41%,晶粒未明显长大,硬度达到最大值61.4 HRC。1050 ℃为4Cr4Mo3W2V1钢的理想淬火温度。

关键词: 4Cr4Mo3W2V1钢, 淬火温度, 微观组织, 硬度

Abstract: Effect of quenching temperature (990-1070 ℃) on microstructure and hardness of 4Cr4Mo3W2V1 die steel was studied by means of OM, SEM and Rockwell hardness tester. The results show that the microstructure of the quenched 4Cr4Mo3W2V1 steel is mainly martensite, bainite and undissolved carbide. With the increase of quenching temperature, the grain size of the steel increases continuously, the number of carbides in the microstructure decreases continuously, and the hardness increases first and then decreases. Quenched at 1050 ℃, the carbide in the microstructure is basically dissolved into the matrix, the volume fraction of carbide is 0.41%, the grain size does not grow significantly, and the hardness reaches the maximum of 61.4 HRC. 1050 ℃ is the ideal quenching temperature for the 4Cr4Mo3W2V1 steel.

Key words: 4Cr4Mo3W2V1 steel, quenching temperature, microstructure, hardness

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