| 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; Zheng, Leigang; Gao, Jinzhu; Zhou, Yangtao; Zhang, Lei; Ma, Xiuliang; Dai, Chunli; Yang, Chaoyun; Jiang, Zhonghua; Liu, Yang; Li, Yiyi | |
| Corresponding Author | Li, Dianzhong(dzli@imr.ac.cn) |
| 2022-09-08 | |
| Source Publication | NATURE MATERIALS
 |
| ISSN | 1476-1122 |
| Pages | 9 |
| Abstract | 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. |
| Funding Organization | 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. |
| DOI | 10.1038/s41563-022-01352-9 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Chemistry ; Materials Science ; Physics |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000852268700001 |
| Publisher | NATURE PORTFOLIO |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/175089 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Li, Dianzhong |
| Affiliation | Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China |
| Recommended Citation 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. |
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