Microstructure evolution under different austenitizing temperatures and its effect on mechanical properties and mechanisms in a newly high aluminum bearing steel

doi:10.1016/j.jmrt.2024.06.030

IMR OpenIR

	Microstructure evolution under different austenitizing temperatures and its effect on mechanical properties and mechanisms in a newly high aluminum bearing steel
	Wang, Leitao 1,2; Sun, Chen 1; Cao, Yanfei 1; Guo, Qianwei 1,2; Song, Kaiyan 1; Liu, Hanghang 1; Liu, Hongwei 1; Fu, Paixian 1
通讯作者	Cao, Yanfei(yfcao10s@imr.ac.cn) ; Fu, Paixian(pxfu@imr.ac.cn)
	2024-05-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	30 页码:9481-9493
摘要	A new type of lightweight high aluminum bearing steel had been developed based on the widely used high carbon chromium bearing steel. Via multi-scale experimental characterizations and theoretical calculations, here we mainly focused on the evolution of microstructure including precipitates under different quenching temperatures. Accordingly, the mechanical properties, mechanisms and fracture features of the new high-Al steel after tempering were characterized in detail. As austenitizing temperature rose, matrix of steel varied from multiphase structure of martensite, retained austenite (RA) and ferrite to the full martensite and RA. RA was found in all four samples with the austenitizing temperature from 850 degrees C to 1000 degrees C. In terms of precipitates, a transformation from M3C to M7C3 were observed. As a phase newly introduced by Al, AlFe3C (kappa carbides) would dissolve into matrix at 900 degrees C. Eventually, the yield strength of the researched steel could reach 1430 MPa with an unnotched impact energy of 35 J. Theoretical results showed that high strength of researched steel was mainly caused by solid solution effect of carbon and high density of dislocation. In terms of toughness and fracture observation, high impact energy was attributed to the highest density of grain boundary, and also, kappa carbides were found at the origin of secondary crack. This study highlighted the significant effect of Al addition and quenching process based on the traditional bearing steel, which showed a novel method and idea to reduce significantly the weight of bearings.
关键词	Bearing steel Lightweight steel Mechanical properties Heat treatments
资助者	National Natural Science Foundation of China ; Doctoral Research Startup Fund Guidance Program Project of Liaoning Province
DOI	10.1016/j.jmrt.2024.06.030
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52321001] ; National Natural Science Foundation of China[52031013] ; Doctoral Research Startup Fund Guidance Program Project of Liaoning Province[2023- BS-014]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001286070000001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188858
专题	中国科学院金属研究所
通讯作者	Cao, Yanfei; Fu, Paixian
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Leitao,Sun, Chen,Cao, Yanfei,et al. Microstructure evolution under different austenitizing temperatures and its effect on mechanical properties and mechanisms in a newly high aluminum bearing steel[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,30:9481-9493.
APA	Wang, Leitao.,Sun, Chen.,Cao, Yanfei.,Guo, Qianwei.,Song, Kaiyan.,...&Fu, Paixian.(2024).Microstructure evolution under different austenitizing temperatures and its effect on mechanical properties and mechanisms in a newly high aluminum bearing steel.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,30,9481-9493.
MLA	Wang, Leitao,et al."Microstructure evolution under different austenitizing temperatures and its effect on mechanical properties and mechanisms in a newly high aluminum bearing steel".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 30(2024):9481-9493.