热处理对51CrMnV弹簧钢力学性能和疲劳性能的影响

doi:10.13251/j.issn.0254-6051.2025.01.012

金属热处理 ›› 2025, Vol. 50 ›› Issue (1): 75-80.DOI: 10.13251/j.issn.0254-6051.2025.01.012

热处理对51CrMnV弹簧钢力学性能和疲劳性能的影响

黄威明¹, 周海安¹, 赵秋红², 许文兵¹, 于鑫泓¹, 冯以盛³, 张云山³, 赵而团¹

1.山东理工大学机械工程学院, 山东淄博 255049;
2.淄博市工程咨询院有限公司, 山东淄博 255049;
3.山东星泉科技有限公司, 山东淄博 255049

收稿日期:2024-08-12 修回日期:2024-11-11 出版日期:2025-01-25 发布日期:2025-03-12
通讯作者: 周海安,副教授,博士,硕士研究生导师,E-mail:zhouhaian@sdut.edu.cn
作者简介:黄威明(1999—),男,硕士研究生,主要研究方向为钢板弹簧的性能,E-mail:m1040268849@163.com。
基金资助:
山东省自然科学基金(ZR2021ME211)

Effect of heat treatment on mechanical properties and fatigue properties of 51CrMnV spring steel

Huang Weiming¹, Zhou Haian¹, Zhao Qiuhong², Xu Wenbing¹, Yu Xinhong¹, Feng Yisheng³, Zhang Yunshan³, Zhao Ertuan¹

1. School of College of Mechanical Engineering, Shandong University of Technology, Zibo Shandong 255049, China;
2. Engineering Consulting Institute Co., Ltd., Zibo Shandong 255049, China;
3. Starspring Technology Co., Ltd., Zibo Shandong 255049, China

Received:2024-08-12 Revised:2024-11-11 Online:2025-01-25 Published:2025-03-12

摘要/Abstract

摘要： 利用光学显微镜(OM)、扫描电镜(SEM)、万能拉伸试验机、冲击试验机和疲劳试验机研究了900 ℃×30 min淬火+450 ℃×90 min回火和900 ℃×30 min+350 ℃×30 min等温淬火工艺下51CrMnV弹簧钢的组织和力学性能。结果表明,经淬火回火处理后,51CrMnV钢组织由回火屈氏体组成;经等温淬火处理后,组织由贝氏体+马氏体+残留奥氏体组成。相较于淬火回火工艺,等温淬火工艺处理51CrMnV钢的力学性能和疲劳性能更好,抗拉强度提高53.6 MPa,断后伸长率提高3.1%,冲击吸收能量提高7.3 J,疲劳极限提高25 MPa。

关键词: 等温淬火, 淬火回火, 51CrMnV弹簧钢, 显微组织, 力学性能, 疲劳性能

Abstract: Microstructure, mechanical properties, and fatigue property of 51CrMnV spring steel under the processes of 900 ℃×30 min quenching+450 ℃×90 min tempering and 900 ℃×30 min+350 ℃×30 min isothermal quenching were investigated by using optical microscopy (OM), scanning electron microscopy (SEM), universal tensile tester, impact tester, and fatigue tester. The results show that after quenching and tempering, the microstructure of the 51CrMnV steel consists of tempered martensite, and after isothermal quenching, the microstructure consists of bainite, martensite and retained austenite. Compared with quenching and tempering, the mechanical properties and fatigue properties of the 51CrMnV steel treated with isothermal quenching are better, with an increase in tensile strength of 53.6 MPa, elongation of 3.1%, impact absorbed energy of 7.3 J, and fatigue limit of 25 MPa.

Key words: isothermal quenching, quenching and tempering, 51CrMnV spring steel, microstructure, mechanical properties, fatigue property

中图分类号:

TG142.1

黄威明, 周海安, 赵秋红, 许文兵, 于鑫泓, 冯以盛, 张云山, 赵而团. 热处理对51CrMnV弹簧钢力学性能和疲劳性能的影响[J]. 金属热处理, 2025, 50(1): 75-80.

Huang Weiming, Zhou Haian, Zhao Qiuhong, Xu Wenbing, Yu Xinhong, Feng Yisheng, Zhang Yunshan, Zhao Ertuan. Effect of heat treatment on mechanical properties and fatigue properties of 51CrMnV spring steel[J]. Heat Treatment of Metals, 2025, 50(1): 75-80.

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热处理对51CrMnV弹簧钢力学性能和疲劳性能的影响

Effect of heat treatment on mechanical properties and fatigue properties of 51CrMnV spring steel

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