Modeling of macrosegregation in steel ingot: influence of mold shape and melt superheat

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	Modeling of macrosegregation in steel ingot: influence of mold shape and melt superheat
	D. R. Liu; X. H. Kang; P. X. Fu; D. Z. Li
	2011
发表期刊	Kovove Materialy-Metallic Materials
ISSN	0023-432X
卷号	49 期号:2 页码:143-153
摘要	A continuum model for the transport phenomena in solidification systems is used to investigate the formation mechanism of macrosegregation in a 3.3 t steel ingot. Numerical scheme with explicit time stepping in solidification problems is developed for solving coupled temperature and concentration fields, and equations of momentum. Experimental measurements and numerical results in the literature are used as indications of the validity of present prediction. Influences of the mold shape and the melt superheat upon macrosegregation are investigated. Results show that for ingots with the same weight, reducing the size of hot top favors a pronounced positive-negative-positive concentration distribution along the centerline. A-segregates and positive-negative-positive concentration distribution are not found in the ingot with a modified hot top that has a more uniform section area. Higher superheat reduces the height of bottom negative segregation cone. For cases with superheat larger than zero, positively segregated patches are observed at the ingot bottom.
部门归属	[liu, d. r.; kang, x. h.; fu, p. x.; li, d. z.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [liu, d. r.] harbin univ sci & technol, sch mat sci & engn, harbin 150040, peoples r china.;liu, dr (reprint author), chinese acad sci, inst met res, 72 wen hua rd, shenyang 110016, peoples r china;nacylake@126.com
关键词	Macrosegregation Steel Ingot Mold Shape Melt Superheat Thermosolutal Convection Solidification
URL	查看原文
WOS记录号	WOS:000289750300007
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30508
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. R. Liu,X. H. Kang,P. X. Fu,et al. Modeling of macrosegregation in steel ingot: influence of mold shape and melt superheat[J]. Kovove Materialy-Metallic Materials,2011,49(2):143-153.
APA	D. R. Liu,X. H. Kang,P. X. Fu,&D. Z. Li.(2011).Modeling of macrosegregation in steel ingot: influence of mold shape and melt superheat.Kovove Materialy-Metallic Materials,49(2),143-153.
MLA	D. R. Liu,et al."Modeling of macrosegregation in steel ingot: influence of mold shape and melt superheat".Kovove Materialy-Metallic Materials 49.2(2011):143-153.