热处理工艺对42CrMo-R钢轮箍组织及力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.09.025

金属热处理 ›› 2024, Vol. 49 ›› Issue (9): 158-164.DOI: 10.13251/j.issn.0254-6051.2024.09.025

热处理工艺对42CrMo-R钢轮箍组织及力学性能的影响

万志健^1,2,3, 安涛^1,2,4, 于文坛^1,2,3, 刘学华^1,2,3, 童乐^1,2,3, 赵海^1,2,3

1.轨道交通关键零部件先进制造技术国家地方联合工程中心, 安徽马鞍山 243003;
2.轨道交通关键零部件安徽省技术创新中心, 安徽马鞍山 243003;
3.马鞍山钢铁股份有限公司, 安徽马鞍山 243003;
4.宝武集团马钢轨交材料科技有限公司, 安徽马鞍山 243000

收稿日期:2024-03-09 修回日期:2024-07-18 出版日期:2024-09-25 发布日期:2024-10-29
通讯作者: 安涛,教授级高级工程师,硕士,E-mail:antao@masteelwheel.com
作者简介:万志健(1991—),男,工程师,硕士,主要研究方向为材料热处理,E-mail:m79345@baosteel.com。
基金资助:
安徽省科技重大专项(202003a05020038)

Effect of heat treatment process on microstructure and mechanical properties of 42CrMo-R steel tyre

Wan Zhijian^1,2,3, An Tao^1,2,4, Yu Wentan^1,2,3, Liu Xuehua^1,2,3, Tong Le^1,2,3, Zhao Hai^1,2,3

1. National-Local Joint Engineering Research Center of Advanced Manufacturing Technology for Key Parts of Rail Transit, Ma'anshan Anhui 243003, China;
2. Key Parts of Rail Transit Technology Innovation Center of Anhui Province, Ma'anshan Anhui 243003, China;
3. Maanshan Iron & Steel Co., Ltd., Ma'anshan Anhui 243003, China;
4. Baowu Group Masteel Rail Transit Materials Technology Co., Ltd., Ma'anshan Anhui 243000, China

Received:2024-03-09 Revised:2024-07-18 Online:2024-09-25 Published:2024-10-29

摘要/Abstract

摘要： 设计并冶炼了42CrMo-R试验钢,并轧成轮箍。采用金相显微镜、扫描电镜及拉伸试验机、硬度计等手段研究了热处理工艺对42CrMo-R钢轮箍组织及力学性能的影响。结果表明,42CrMo-R钢轮箍在830~980 ℃范围内淬火后,组织基体均为板条马氏体,当淬火温度超过890 ℃,板条马氏体占比显著增多;860 ℃淬火时,原奥氏体晶粒尺寸分布均匀并且强度最高,为最佳淬火温度。在520~600 ℃范围内回火,轮箍基体组织均为回火索氏体;随着回火温度的升高,硬度、抗拉强度、屈服强度均呈下降趋势,而断后伸长率、断面收缩率则基本呈上升趋势。42CrMo-R钢轮箍经860 ℃淬火及560~580 ℃回火后,回火索氏体占比较高,存在少量未溶铁素体,R_m、R_p0.2、硬度、断后伸长率与客户要求相比均有较大富余量,具有良好的组织及综合力学性能。

关键词: 热处理, 42CrMo-R钢, 轮箍, 组织, 力学性能

Abstract: 42CrMo-R test steel was designed and smelted and rolled into a tyre. Effect of heat treatment process on microstructure and mechanical properties of the 42CrMo-R steel tyre were studied by means of metallographic microscope, scanning electron microscope, tensile testing machine, hardness tester and other methods. The results show that after quenching in the range of 830-980 ℃, the matrix of the 42CrMo-R steel tyre is lath martensite, when the quenching temperature exceeds 890 ℃, the proportion of lath martensite increases significantly, and when quenched at 860 ℃, the original austenite grain size distribution is uniform and the strength is the highest, so it is the optimal quenching temperature. Tempered in the range of 520-600 ℃, the tyre matrix microstructure are all tempered martensite. With the increase of tempering temperature, the hardness, tensile strength and yield strength all show a downward trend, while the elongation and percentage reducation of area basically show an upward trend. After quenching at 860 ℃and tempering at 560-580 ℃, the 42CrMo-R steel tyre has a relatively high proportion of tempered martensite, a small amount of undissolved ferrite and there is a large margin of R_m, R_p0.2, hardness and elongation compared with customer requirements, and it has good microstructure and comprehensive mechanical properties.

Key words: heat treatment, 42CrMo-R steel, tyre, microstructure, mechanical properties

中图分类号:

TG142.3

万志健, 安涛, 于文坛, 刘学华, 童乐, 赵海. 热处理工艺对42CrMo-R钢轮箍组织及力学性能的影响[J]. 金属热处理, 2024, 49(9): 158-164.

Wan Zhijian, An Tao, Yu Wentan, Liu Xuehua, Tong Le, Zhao Hai. Effect of heat treatment process on microstructure and mechanical properties of 42CrMo-R steel tyre[J]. Heat Treatment of Metals, 2024, 49(9): 158-164.

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热处理工艺对42CrMo-R钢轮箍组织及力学性能的影响

Effect of heat treatment process on microstructure and mechanical properties of 42CrMo-R steel tyre

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