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Numerical modeling of centerline segregation by a combined 3-D and 2-D hybrid model during slab continuous casting

Published online by Cambridge University Press:  19 February 2018

Huabiao Chen ,
Dengfu Chen ,
Mujun Long ,
Huamei Duan ,
Yunwei Huang  and
Lintao Gui
Huabiao Chen
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Dengfu Chen*
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Mujun Long*
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Huamei Duan
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Yunwei Huang
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Lintao Gui
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
*
a)Address all correspondence to these authors. e-mail: chendfu@cqu.edu.cn
b)e-mail: longmujun@cqu.edu.cn
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Abstract

Centerline segregation is one of the typical internal defects, which occurs during slab continuous casting (CC). To investigate and predict the centerline segregation encountered in a continuously cast slab, a combined 3-D and 2-D hybrid simulation model for centerline segregation was developed. The average deviation between the calculated and experimented results reaches as low as 0.5%, which demonstrates that the hybrid simulation model has relatively high reliability. The centerline segregation of the slab was predicted accurately. The results show that macrosegregation occurring during the slab CC process has heredity. In the casting direction, the concentration of solutes in the liquid pool increases gradually until the casting has solidified completely. After complete solidification, the solutes’ concentration maintains an almost constant value. On the centerline, the maximum segregation degree occurs at a position roughly 614 mm from the slab center. The maximum centerline segregation degrees of C, Si, Mn, P, and S solutes are 1.163, 1.058, 1.045, 1.111, and 1.165, respectively.

Keywords

slab continuous castinghybrid simulation modelcenterline segregationsolute redistribution
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 8 , 27 April 2018 , pp. 989 - 1002
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

Contributing Editor: Susan B. Sinnott

References

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