NDLI: Numerical Simulation of Macrosegregation in Water-Cooled Heavy Flat Ingot During Solidification

Content Provider	Springer Nature Link
Author	Meng, Qingyong Wang, Fuming Li, Changrong Li, Menglong Zhang, Jing Cui, Guanjun
Copyright Year	2014
Abstract	Based on a volume-averaged two-phase approach, a coupled concentration, temperature, and velocity fields model has been established to predict the formation of macrosegregation during solidification. Because of the significant influence of velocity field on solute transfer and distribution during solidification process, the density of liquid steel was set as a function of temperature and concentration to accurately calculate the velocity field. Therefore, the influence of gravity, temperature gradient, concentration gradient, and volume shrinkage on velocity field distribution was comprehensively considered. The calculation result showed good agreement with previous reports. Thereafter, the current model was applied to simulate the solidification of 12Cr2Mo1R (ASTM standard 2.25Cr1Mo) heavy ingot, and the influence of surface cooling intensity on the final carbon macrosegregation was investigated. The results showed that with the increase of cooling intensity, the solidification time, flow velocity, and mushy zone width decrease, and as a result, macrosegregation is alleviated. When the heat-transfer coefficient is less than 1000 W m$^{−2}$ K$^{−1}$, macrosegregation dramatically decreases with the rise of cooling intensity. In contrast, when heat-transfer coefficient is greater than 1000 W m$^{−2}$ K$^{−1}$, the effect of reducing the central carbon segregation by increasing cooling is weakened.
Starting Page	1166
Ending Page	1174
Page Count	9
File Format	PDF
ISSN	10474838
Journal	JOM
Volume Number	66
Issue Number	7
e-ISSN	15431851
Language	English
Publisher	Springer US
Publisher Date	2014-05-24
Publisher Institution	The Minerals, Metals & Materials Society (TMS)
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Chemistry/Food Science Physics Environment Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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