Low-oxygen rare earth steels

doi:10.1038/s41563-022-01352-9

CORC > 金属研究所 > 中国科学院金属研究所

	Low-oxygen rare earth steels
	Li, Dianzhong; Wang, Pei; Chen, Xing-Qiu; Fu, Paixian; Luan, Yikun; Hu, Xiaoqiang; Liu, Hongwei; Sun, Mingyue; Chen, Yun; Cao, Yanfei
刊名	NATURE MATERIALS
	2022-09-08
页码	9
ISSN号	1476-1122
DOI	10.1038/s41563-022-01352-9
通讯作者	Li, Dianzhong(dzli@imr.ac.cn)
英文摘要	Rare earth (RE) addition to steels to produce RE steels has been widely applied when aiming to improve steel properties. However, RE steels have exhibited extremely variable mechanical performances, which has become a bottleneck in the past few decades for their production, utilization and related study. Here in this work, we discovered that the property variation of RE steels stems from the presence of oxygen-based inclusions. We proposed a dual low-oxygen technology, and keeping low levels of oxygen content in steel melts and particularly in the raw RE materials, which have long been ignored, to achieve impressively stable and favourable RE effects. The fatigue life is greatly improved by only parts-per-million-level RE addition, with a 40-fold improvement for the tension-compression fatigue life and a 40% enhancement of the rolling contact fatigue life. We find that RE appears to act by lowering the carbon diffusion rate and by retarding ferrite nucleation at the austenite grain boundaries. Our study reveals that only under very low-oxygen conditions can RE perform a vital role in purifying, modifying and micro-alloying steels, to improve the performance of RE steels.
资助项目	National Natural Science Foundation[52031013] ; National Natural Science Foundation[U1708252] ; National Natural Science Foundation[51725103] ; Zhejiang Tianma Bearing Co., Ltd. ; Baotou Iron and Steel Group ; Benxi Steel Group Corporation ; Anshan Iron and Steel Group ; Shougang Group ; HBIS Group Co., Ltd. ; Shandong Iron and Steel Group Co., Ltd. ; Hubei Xinyegang Steel Co., Ltd. ; Xining Special Steel Co., Ltd. ; Xiwang Special Steel Co., Ltd. ; Magang (Group) Holding Co., Ltd.
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000852268700001
资助机构	National Natural Science Foundation ; Zhejiang Tianma Bearing Co., Ltd. ; Baotou Iron and Steel Group ; Benxi Steel Group Corporation ; Anshan Iron and Steel Group ; Shougang Group ; HBIS Group Co., Ltd. ; Shandong Iron and Steel Group Co., Ltd. ; Hubei Xinyegang Steel Co., Ltd. ; Xining Special Steel Co., Ltd. ; Xiwang Special Steel Co., Ltd. ; Magang (Group) Holding Co., Ltd.
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/175088]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Dianzhong
作者单位	Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Li, Dianzhong,Wang, Pei,Chen, Xing-Qiu,et al. Low-oxygen rare earth steels[J]. NATURE MATERIALS,2022:9.
APA	Li, Dianzhong.,Wang, Pei.,Chen, Xing-Qiu.,Fu, Paixian.,Luan, Yikun.,...&Li, Yiyi.(2022).Low-oxygen rare earth steels.NATURE MATERIALS,9.
MLA	Li, Dianzhong,et al."Low-oxygen rare earth steels".NATURE MATERIALS (2022):9.