二十辊轧机用Cr8钢冷轧辊的热处理工艺及合金化成分优化

doi:10.13251/j.issn.0254-6051.2026.02.030

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 204-210.DOI: 10.13251/j.issn.0254-6051.2026.02.030

二十辊轧机用Cr8钢冷轧辊的热处理工艺及合金化成分优化

侯晓辉¹, 闫俊伟¹, 帅美荣¹, 王建梅^1,2, 李保平³, 苗建军³

1.太原科技大学高端重型机械装备研究院, 山西太原 030024;
2.山西工程技术学院, 山西阳泉 045000;
3.山西百一机械设备制造有限公司, 山西太原 030003

收稿日期:2025-09-21 修回日期:2025-12-17 发布日期:2026-03-05
通讯作者: 帅美荣,教授,博士,E-mail:2001041@tyust.edu.cn
作者简介:侯晓辉(1999—),男,硕士研究生,主要研究方向为冷轧辊材料,E-mail:s202347211264@stu.tyust.edu.cn。
基金资助:
太原市关键核心技术攻关“揭榜挂帅”项目(2024TYJB0114);山西省重点研发计划(202302150401003);太原科技大学研究生实践创新项目(SJ2025027)

Heat treatment process and alloying composition optimization for Cr8 steel cold-rolling roller in a 20-roller mill

Hou Xiaohui¹, Yan Junwei¹, Shuai Meirong¹, Wang Jianmei^1,2, Li Baoping³, Miao Jianjun³

1. High-end Heavy Machinery and Equipment Research Institute, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China;
2. Shanxi Institute of Technology, Yangquan Shanxi 045000, China;
3. Shanxi Baiyi Machinery and Equipment Manufacturing Co., Ltd., Taiyuan Shanxi 030003, China

Received:2025-09-21 Revised:2025-12-17 Published:2026-03-05

摘要/Abstract

摘要： 针对森吉米尔二十辊轧机用冷轧辊开展热处理工艺及合金化成分优化设计。利用JMatPro软件模拟了冷轧辊用Cr8钢不同Nb含量下的温度-相变曲线,奥氏体中元素含量变化曲线以及CCT曲线。对奥氏体化温度以及淬火马氏体含碳量对轧辊硬度的影响进行分析,并综合考虑回火温度及回火时间对MC碳化物析出规律的影响,计算得到冷轧辊的最优热处理工艺,同时,以提升轧辊硬度和屈服强度为目标优化合金成分,计算得到最优Nb含量。在此基础上,对试制不含Nb和含0.6%Nb的Cr8钢轧辊热处理后的组织和耐磨性进行了对比分析。结果表明,Cr8钢最优热处理工艺为1100 ℃×2 h淬火+550 ℃×3 h回火,最佳Nb添加量为0.6%。含0.6%Nb的Cr8钢轧辊热处理后碳化物晶粒较小,有较多NbC晶粒析出,钉扎于晶界处,能够抑制原奥氏体晶粒粗化,提高材料强度,且其磨损机理以氧化磨损为主,磨损体积较Cr8钢轧辊降低约40%。

关键词: Cr8型冷轧辊, 热处理, 成分优化, 微观组织, 耐磨性

Abstract: Heat treatment process and alloying composition for cold-rolling roller of Sendzimir 20-roller mill were designed and optimized. The temperature-phase transformation curves, element content changes in austenite, and CCT curves of Cr8 steel with different Nb contents for the cold-rolling roller were simulated using JMatPro software. Based on the analysis of the effect of austenitizing temperature and quenched martensite carbon content on roller hardness, and considering the effects of tempering temperature and tempering time on the precipitation law of MC carbides, the optimal heat treatment process for cold-rolling roller was calculated. Meanwhile, The optimal Nb content was calculated by optimizing the alloying composition with the goal of improving the hardness and yield strength of the roller. Based on these, a comparative analysis was conducted on the microstructure and wear resistance of the Cr8 steel roller with Nb-free and 0.6%Nb containing after heat treatment. The results indicate that the optimal heat treatment process for the Cr8 steel is quenching at 1100 ℃ for 2 h followed by tempering at 550 ℃ for 3 h, and the optimal Nb addition amount is 0.6%. After heat treatment, the carbide grains of the Cr8 steel roller containing 0.6%Nb are smaller, and more NbC grains are precipitated, which are nailed at the grain boundaries and can suppress the coarsening of the original austenite grains, improve the material strength. And the wear mechanism of the Cr8 steel roller containing 0.6%Nb is mainly oxidation wear, with a wear volume reduced by about 40% compared to the Cr8 steel roller.

Key words: Cr8 cold-rolling roller, heat treatment, composition optimization, microstructure, wear resistance

中图分类号:

TG161

侯晓辉, 闫俊伟, 帅美荣, 王建梅, 李保平, 苗建军. 二十辊轧机用Cr8钢冷轧辊的热处理工艺及合金化成分优化[J]. 金属热处理, 2026, 51(2): 204-210.

Hou Xiaohui, Yan Junwei, Shuai Meirong, Wang Jianmei, Li Baoping, Miao Jianjun. Heat treatment process and alloying composition optimization for Cr8 steel cold-rolling roller in a 20-roller mill[J]. Heat Treatment of Metals, 2026, 51(2): 204-210.

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二十辊轧机用Cr8钢冷轧辊的热处理工艺及合金化成分优化

Heat treatment process and alloying composition optimization for Cr8 steel cold-rolling roller in a 20-roller mill

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