新型渗碳22Cr2Ni3SiMo轴承钢的表层组织与性能

doi:10.13251/j.issn.0254-6051.2025.05.011

金属热处理 ›› 2025, Vol. 50 ›› Issue (5): 66-71.DOI: 10.13251/j.issn.0254-6051.2025.05.011

新型渗碳22Cr2Ni3SiMo轴承钢的表层组织与性能

赵佳莉¹, 宋锦灏², 信瑞山¹, 张欣杰³, 尚旭阳², 赵雷杰^2,3, 王艳辉^2,3

1.鞍钢集团北京研究院有限公司, 北京 102211;
2.河北工程大学河北省智能工业装备技术重点实验室, 河北邯郸 056038;
3.中航上大高温合金材料股份有限公司河北省高温合金再生技术重点实验室, 河北邢台 054800

收稿日期:2024-11-05 修回日期:2025-03-27 发布日期:2025-06-25
通讯作者: 王艳辉,教授,博士,E-mail:wangyanhui@hebeu.edu.cn
作者简介:赵佳莉(1991—),女,研究员,博士,主要研究方向为先进钢铁材料的组织及性能,E-mail:2635123575@qq.com。
基金资助:
河北省高等学校科学技术研究产学研合作专项(CXZX2025027);中航上大高温合金材料股份有限公司院士合作重点单位项目;邢台市重大科技专项(2023ZZ001)

Surface microstructure and properties of a novel carburized 22Cr2Ni3SiMo bearing steel

Zhao Jiali¹, Song Jinhao², Xin Ruishan¹, Zhang Xinjie³, Shang Xuyang², Zhao Leijie^2,3, Wang Yanhui^2,3

1. Ansteel Beijing Research Institute Co., Ltd., Beijing 102211, China;
2. Key Laboratory of Intelligent Industrial Equipment Technology of Hebei Province, Hebei University of Engineering, Handan Hebei 056038, China;
3. Key Laboratory of Hebei Province on High Temperature Alloy Regeneration Technology, Zhonghangshangda Superalloys Co., Ltd., Xingtai Hebei 054800, China

Received:2024-11-05 Revised:2025-03-27 Published:2025-06-25

摘要/Abstract

摘要： 对新型22Cr2Ni3SiMo轴承钢进行渗碳+高温回火+等温淬火处理,研究了不同热处理工艺下其表层组织与性能。结果表明,试验钢渗碳后油淬,然后经650 ℃回火3 h,可获得表层约7.3%(体积分数)的碳化物,符合技术要求。渗碳后未经高温回火而直接奥氏体化并等温淬火后的表层组织为马氏体+贝氏体+残留奥氏体。对于渗碳后经高温回火的试验钢,随着奥氏体化后等温淬火时间的延长,残留奥氏体含量整体呈现下降趋势。渗碳后经高温回火直接油淬试样的残留奥氏体含量相对等温淬火试样较低,其表面硬度达63.4 HRC,而在200 ℃盐浴等温淬火4和8 h后的表面硬度分别为62.5和60.8 HRC,符合风电轴承钢表面硬度大于60 HRC的技术要求。

关键词: 22Cr2Ni3SiMo轴承钢, 渗碳, 高温回火, 等温淬火, 组织, 硬度

Abstract: Carburizing, high-temperature tempering and salt bath quenching of a novel 22Cr2Ni3SiMo bearing steel was carried out, and the microstructure and properties under different heat treatment processes were studied. The results show that after carburizing+oil quenching and then tempering at 650 ℃ for 3 h, the carbides volumes fraction on surface layer of the tested steel can be about 7.3%, meeting the technical requirement. After carburizing without high-temperature tempering, the surface structure of the bearing steel directly austenitized and subjected to salt bath quenching consists of martensite+bainite+retained austenite. For the tested steel tempered at high-temperature after carburizing, with the prolongation of salt bath quenching time after austenitizing, the retained austenite content shows a downward trend. The retained austenite content of oil quenched tested steel after carburizing and tempering at high-temperature is relatively lower than that of the salt bath quenched, its surface hardness reaches 63.4 HRC, which is 62.5 and 60.8 HRC when salt bath quenched at 200 ℃ for 4 h and 8 h, respectively, in line with the technical requirements of wind power bearing steel surface hardness of more than 60 HRC.

Key words: 22Cr2Ni3SiMo bearing steel, carburizing, high-temperature tempering, salt bath quenching, microstructure, hardness

中图分类号:

TG142.3

赵佳莉, 宋锦灏, 信瑞山, 张欣杰, 尚旭阳, 赵雷杰, 王艳辉. 新型渗碳22Cr2Ni3SiMo轴承钢的表层组织与性能[J]. 金属热处理, 2025, 50(5): 66-71.

Zhao Jiali, Song Jinhao, Xin Ruishan, Zhang Xinjie, Shang Xuyang, Zhao Leijie, Wang Yanhui. Surface microstructure and properties of a novel carburized 22Cr2Ni3SiMo bearing steel[J]. Heat Treatment of Metals, 2025, 50(5): 66-71.

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新型渗碳22Cr2Ni3SiMo轴承钢的表层组织与性能

Surface microstructure and properties of a novel carburized 22Cr2Ni3SiMo bearing steel

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