Modelling of macrosegregation in large steel ingot with considering solid movement

CORC > 金属研究所 > 中国科学院金属研究所

	Modelling of macrosegregation in large steel ingot with considering solid movement
	D. R. Liu ; B. G. Sang ; X. H. Kang ; D. Z. Li
刊名	Acta Physica Sinica
	2009
卷号	58 期号:6 页码:S104-S111
关键词	macrosegregation solid movement formation of A segregation numerical simulation globular equiaxed solidification thermosolutal convection transport phenomena grain movement predictions simulation alloys flow
ISSN号	1000-3290
中文摘要	Based on the Eulerian and the volume averaging methods, a mathematical model of macrosegregation formation with considering solid movement during solidification of large steel ingot is developed. The cases with and without solid movement are studied and compared. The result shows that the A segregation band results from a narrow channel that forms around the position where the solidified shell in the horizontal direction meets the one in the vertical direction, which serves as a barrier to the fluid flow, leading to the accumulation of solute. Effects of critical solid fraction and density of solid on evolution of macrosegregation are investigated. The results indicate that both the positive segregation in the A segregation band and the bottom negative segregation become more pronounced with the critical solid fraction increasing. As the density of solid increases, stronger macrosegregations occur at the upper and bottom parts of the ingot. However, the length of A segregation band is not increased with density of solid. Calculated results show good agreement with experimental ones, except a larger bottom negative segregation zone.
原文出处	://WOS:000270312900017
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/32073]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	D. R. Liu,B. G. Sang,X. H. Kang,et al. Modelling of macrosegregation in large steel ingot with considering solid movement[J]. Acta Physica Sinica,2009,58(6):S104-S111.
APA	D. R. Liu,B. G. Sang,X. H. Kang,&D. Z. Li.(2009).Modelling of macrosegregation in large steel ingot with considering solid movement.Acta Physica Sinica,58(6),S104-S111.
MLA	D. R. Liu,et al."Modelling of macrosegregation in large steel ingot with considering solid movement".Acta Physica Sinica 58.6(2009):S104-S111.