Effect of austenitizing temperature on isothermal quenching microstructure and mechanical properties of 52100 bearing steel

doi:10.1016/j.msea.2023.146051

IMR OpenIR

	Effect of austenitizing temperature on isothermal quenching microstructure and mechanical properties of 52100 bearing steel
	Li, Yonghan 1,2; Jiang, Zhonghua 1,2; Wang, Pei 1,2; Li, Dianzhong 1,2
通讯作者	Wang, Pei(pwang@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn)
	2024-02-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	892 页码:12
摘要	In general, isothermal quenching heat treatment in salt bath can improve the toughness but sacrifice the strength and hardness of 52100 bearing steel. Many previous studies focusing on the isothermal quenching process have been carried out to balance the strength and toughness. And the optimal mechanical properties are limited to approximately 60-61 HRC hardness and 100 J impact toughness. In this study, in order to further improve the mechanical properties, the influences of austenitizing temperature on microstructural evolution and strengthening-toughening mechanism in isothermal quenched bainite in 52100 bearing steel have been systematically investigated. The increase of austenitizing temperature decreases the volume fraction of undissolved carbides, and increases the carbon concentration in austenite matrix. These changes not only strongly influence the kinetics of bainite phase transformation and bainite microstructure, but also cause the conflict between the coarsening of prior austenite grains, as well as bainite sheaves, and the refining of substructure of lower bainite. Austenitizing at 870 degrees C can balance this conflict well and obtain a good combination of hardness and toughness. It is found that the carbon content and dislocation density in bainite ferrite reach the peak value at 870 degrees C austenitized specimens, which effectively strengthens the bearing steels. At the same time, the 870 degrees C austenitized specimens retain appropriate content of undissolved carbides, which avoids stress concentration and inhibits crack propagation, and finally improve the impact toughness. Therefore, the optimal austenitizing temperature (870 degrees C) achieves the improvement of mechanical properties with the hardness and toughness of 59.7 HRC and 273 J, respectively.
关键词	Bearing steel Austenitizing temperature Bainite transformation Mechanical property
资助者	Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
DOI	10.1016/j.msea.2023.146051
收录类别	SCI
语种	英语
资助项目	Foundation of China[52031013] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDC 04010300]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001164647200001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/184589
专题	中国科学院金属研究所
通讯作者	Wang, Pei; Li, Dianzhong
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Yonghan,Jiang, Zhonghua,Wang, Pei,et al. Effect of austenitizing temperature on isothermal quenching microstructure and mechanical properties of 52100 bearing steel[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,892:12.
APA	Li, Yonghan,Jiang, Zhonghua,Wang, Pei,&Li, Dianzhong.(2024).Effect of austenitizing temperature on isothermal quenching microstructure and mechanical properties of 52100 bearing steel.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,892,12.
MLA	Li, Yonghan,et al."Effect of austenitizing temperature on isothermal quenching microstructure and mechanical properties of 52100 bearing steel".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 892(2024):12.