Numerical simulation of macrosegregation in large multiconcentration poured steel ingot

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	Numerical simulation of macrosegregation in large multiconcentration poured steel ingot
	D. R. Liu; B. G. Sang; X. H. Kang; D. Z. Li
	2010
发表期刊	International Journal of Cast Metals Research
ISSN	1364-0461
卷号	23 期号:6 页码:354-363
摘要	A continuum model for the transport phenomena in solidification systems is used to investigate the formation of macrosegregation in a 360 t multiconcentration poured steel ingot. A numerical scheme with explicit time stepping in solidification problems is employed to solve coupled temperature and concentration fields, and equations of momentum. The proposed scheme is tested against an experimental concentration field reported in the literature. The influences of the concentration in each ladle and the ladle pouring time upon macrosegregation are studied. The simulation results show that, with a shorter time for the last ladle, macrosegregation is not significantly reduced with MCP compared with conventional single concentration pouring. A longer ladle time produced a marked reduction in the extent of positive segregation at the top of the ingot. Any positive segregation in excess of the industrial requirement limit is shifted to the riser. If the last ladle is poured after a longer time, growth of channel segregates is initiated by local remelting.
部门归属	[liu, d. r.; sang, b. g.; kang, x. h.; 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.;kang, xh (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;xhkang@imr.ac.cn
关键词	Macrosegregation Multiconcentration Pouring Steel Ingot Casting Numerical Simulation Solidification Models Macro Segregation Grain Structures Prevention Convection Alloys Scheme
URL	查看原文
WOS记录号	WOS:000281639600005
引用统计	被引频次：14[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/321006/31272
专题	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. Numerical simulation of macrosegregation in large multiconcentration poured steel ingot[J]. International Journal of Cast Metals Research,2010,23(6):354-363.
APA	D. R. Liu,B. G. Sang,X. H. Kang,&D. Z. Li.(2010).Numerical simulation of macrosegregation in large multiconcentration poured steel ingot.International Journal of Cast Metals Research,23(6),354-363.
MLA	D. R. Liu,et al."Numerical simulation of macrosegregation in large multiconcentration poured steel ingot".International Journal of Cast Metals Research 23.6(2010):354-363.