稀土Ce-Y混合添加对51CrV4弹簧钢组织与性能的影响

doi:10.13251/j.issn.0254-6051.2025.12.034

金属热处理 ›› 2025, Vol. 50 ›› Issue (12): 218-226.DOI: 10.13251/j.issn.0254-6051.2025.12.034

稀土Ce-Y混合添加对51CrV4弹簧钢组织与性能的影响

殷斌冰¹, 王和斌^2,3, 葛家声², 欧平⁴, 余剑³, 张伟³, 陈明³, 赖朝彬¹

1.江西理工大学冶金工程学院高性能钢铁合金材料江西省重点实验室, 江西赣州 341000;
2.江西理工大学材料科学与工程学院, 江西赣州 341000;
3.方大特钢科技股份有限公司, 江西南昌 330012;
4.广西民族大学材料与环境学院, 广西南宁 530105

收稿日期:2025-09-25 修回日期:2025-11-13 发布日期:2026-01-06
通讯作者: 王和斌,副教授,博士,E-mail: wanghemse@163.com
作者简介:殷斌冰(2000—),男,硕士研究生,主要研究方向为金属材料制备与加工,E-mail: 18698528763@163.com。
基金资助:
江西省重点研发计划(20223BBE51017);广西科技重大专项(桂科AA24206065);江西省自然科学基金(20232BAB204002)

Effect of rare earth Ce-Y co-addition on microstructure and properties of 51CrV4 spring steel

Yin binbing¹, Wang Hebin^2,3, Ge Jiasheng², Ou Ping⁴, Yu Jian³, Zhang Wei³, Chen Ming³, Lai Chaobin¹

1. Jiangxi Provincial Key Laboratory of High-Performance Steel and Iron Alloy Materials, School of Metallurgical Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China;
2. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China;
3. Fangda Special Steel Technology Co., Ltd., Nanchang Jiangxi 330012, China;
4. School of Materials and Environment, Guangxi Minzu University, Nanning Guangxi 530105, China

Received:2025-09-25 Revised:2025-11-13 Published:2026-01-06

摘要/Abstract

摘要： 采用扫描电镜、能谱仪、单向拉伸试验等手段,研究了稀土Ce-Y混合添加对51CrV4弹簧钢夹杂物、显微组织和力学性能的影响。结果表明,稀土Ce-Y混合添加可以将钢中的MnS和Al₂O₃夹杂物改性成细小、球状的稀土夹杂物。经850 ℃淬火后,稀土添加使弹簧钢的奥氏体晶粒、马氏体块和板条尺寸分别由11.5、5.2和0.80 μm下降至7.1、4.1和0.72 μm。经420~500 ℃回火后,钢中渗碳体由长条状转变为短棒状,最后变为球状。随回火温度的升高,试验钢的强度逐渐下降,塑性逐渐升高。在450 ℃回火时,稀土的添加使渗碳体片层厚度下降26.21%,尺寸更小,分布更为弥散,此时钢的屈服强度、抗拉强度和断后伸长率分别提升至1507 MPa、1616 MPa和10.83%,力学性能最佳。

关键词: 弹簧钢, 稀土Ce-Y, 回火温度, 显微组织, 力学性能

Abstract: Effect of Ce-Y rare earth (RE) co-addition on inclusions, microstructure, and mechanical properties of 51CrV4 spring steel was investigated by using scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and uniaxial tensile testing. The results show that Ce-Y co-addition transforms MnS and Al₂O₃ inclusions in the steel into fine, spherical RE inclusions. After quenching at 850 ℃, the RE addition refines the prior austenite grain size, martensite block size, and lath width from 11.5, 5.2 and 0.80 μm to 7.1, 4.1 and 0.72 μm, respectively. During tempering at 420-500 ℃, the cementite in the steel evolves from elongated rod to short rod and finally to spheroid. With tempering temperature increasing, the strength of the steel gradually decreases while its plasticity increases. When tempered at 450 ℃, the RE addition reduces lamellar thickness of cementite by 26.21%, resulting in finer size and more dispersed distribution. Consequently, the steel achieves its optimal mechanical properties, with yield strength, tensile strength and elongation after fracture reaching 1507 MPa, 1616 MPa and 10.83%, respectively.

Key words: spring steel, rare earth Ce-Y, tempering temperature, microstructure, mechanical properties

中图分类号:

TG142.1

殷斌冰, 王和斌, 葛家声, 欧平, 余剑, 张伟, 陈明, 赖朝彬. 稀土Ce-Y混合添加对51CrV4弹簧钢组织与性能的影响[J]. 金属热处理, 2025, 50(12): 218-226.

Yin binbing, Wang Hebin, Ge Jiasheng, Ou Ping, Yu Jian, Zhang Wei, Chen Ming, Lai Chaobin. Effect of rare earth Ce-Y co-addition on microstructure and properties of 51CrV4 spring steel[J]. Heat Treatment of Metals, 2025, 50(12): 218-226.

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稀土Ce-Y混合添加对51CrV4弹簧钢组织与性能的影响

Effect of rare earth Ce-Y co-addition on microstructure and properties of 51CrV4 spring steel

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