2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 11 Poveromo Intl. Symp. Advanced Iron & Steel Making and Production of Ferro-alloys
| Editors: | F. Kongoli, G.Brooks, P. Butterworth, M. Geerdes, Y. Gordon, M. Grant, L. Lu, D. Lu, K. Saito, H. Sohn, T. Usui. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 276 pages |
| ISBN: | 978-1-989820-54-4(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Solidification of Special Steel Billets in Continuous Casting with Different Electromagnetic Stirring
Engang Wang1;1NORTHEASTERN UNIVERSITY, Shenyang, China;
Type of Paper: Regular
Id Paper: 28
Topic: 2
Abstract:
In the continuous casting of steel, the rotary or linear electromagnetic stirring were generally used to improve the internal quality of billets, bloom and slabs by generating horizontal rotary motion inside the casting billet, by promoting heat dissipation and temperature homogenization, thereby increasing the equiaxed grain ratio[1] and refining grain size[2], etc. However, in the final solidifying zone of special steel billets, e.g. the stainless steel, bearing steel and nickel-based steel, the poor fluidity and feeding ability of molten metal could not be improved by the horizontal rotary motion inside the casting billet, so that the centre of special billets usually have some central band defects which are difficult to eliminate in the subsequent rolling process, such as element segregation, porosity, shrinkage cavity, cracks and so on.
In this paper, the solidification structure of special steel billets were investigated under a new type of vertical electromagnetic stirring to improve the central quality of continuous casting billets. The results show that the new type of vertical electromagnetic stirring can form a large melt circulation movement up and down in the center of the billet, promote the temperature and composition mixing of the molten steel, and improve the feeding ability of molten steel to the final solidifying zone. So that the central band defects in the special steel billet are greatly improved and eliminated. The mechanism of vertical electromagnetic stirring to promote columnar-to-equiaxed transition and improve the solidification structure is analyzed in this paper. This work was financially supported by NSFC (No. U1760206) and the 111 Project 2.0 of China (No. BP0719037). Correspondent: egwang@mail.neu.edu.cn
Keywords:
Crystallization; Metallurgy; Steel; Structure;References:
[1] Y. Xu, R. J. Xu, and Z. J. Fan, Int. J. Miner. Metall. Mater. 23 ( 2016) 534-541.[2] T. Sun, F. Yue, H. J. Wu, J Iron Steel Res Int. 23 (2016) 329-337.