Cerium refinement of grains and primary carbides during solidification of Cr4Mo4V bearing steel*
文献类型：期刊论文
| 作者 | Liu, Weifeng1; Wang, Jianqiang2; Sun, Mingyue2; Xu, Bin2; Yao, Jiahao1; Fan, Qunbo1; Li, Dianzhong2 |
| 刊名 | JOURNAL OF RARE EARTHS
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 42期号:4页码:783-792 |
| 关键词 | Cr4Mo4V bearing steel Rare Earths Grains Primary carbides Refinement |
| ISSN号 | 1002-0721 |
| DOI | 10.1016/j.jre.2023.05.001 |
| 通讯作者 | Sun, Mingyue(mysun@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn) |
| 英文摘要 | The effect of cerium (Ce) on the solidification microstructure of Cr4Mo4V bearing steel was investigated via a combined experimental and theoretical method. With a trace amount (0.056 wt%) of Ce addition, the coarse columnar grains in as-cast microstructure transform into equiaxed ones, and the average diameter is reduced from 56 to 27 mm. The network-like and bulky primary MC and M2C carbides at the interdendritic regions become disconnected and refined, and their volume percentage decreases from 4.15 vol% to 2.1 vol%. Ce-inclusions acting as heterogeneous nucleation agents of prior-austenite grains and Ce atoms segregating at grain boundaries, both contribute to the refinement of grains. Thermodynamic calculations reveal that primary carbides are precipitated after g-austenite forms near the end of the solidification process. The modification of primary carbides in size and amount is mainly attributed to the isolated remaining melt separated by refined g-austenite grains in which the nucleation of carbides is promoted, while the growth is restrained owing to the less segregation of alloying elements. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths. |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:001217552800001 |
| 出版者 | ELSEVIER |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Sun, Mingyue; Li, Dianzhong |
| 作者单位 | 1.Beijing Inst Technol, Chongqing Innovat Ctr, Chongqing 401135, 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 | Liu, Weifeng,Wang, Jianqiang,Sun, Mingyue,et al. Cerium refinement of grains and primary carbides during solidification of Cr4Mo4V bearing steel*[J]. JOURNAL OF RARE EARTHS,2024,42(4):783-792. |
| APA | Liu, Weifeng.,Wang, Jianqiang.,Sun, Mingyue.,Xu, Bin.,Yao, Jiahao.,...&Li, Dianzhong.(2024).Cerium refinement of grains and primary carbides during solidification of Cr4Mo4V bearing steel*.JOURNAL OF RARE EARTHS,42(4),783-792. |
| MLA | Liu, Weifeng,et al."Cerium refinement of grains and primary carbides during solidification of Cr4Mo4V bearing steel*".JOURNAL OF RARE EARTHS 42.4(2024):783-792. |
入库方式： OAI收割
来源：金属研究所
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