Numerical study of macrosegregation formation of ingot cast in normal sand mold and water-cooled sand mold

doi:10.11890/1006-7191-111-54

Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (1): 54-64.DOI: 10.11890/1006-7191-111-54

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Numerical study of macrosegregation formation of ingot cast in normal sand mold and water-cooled sand mold

Dongrong LIU^1,2, Xiuhong KANG¹, Baoguang SANG¹, Dianzhong LI¹

1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China

Received:2010-06-03 Revised:2010-08-15 Online:2011-02-25 Published:2011-02-25
Contact: Xiuhong KANG

Abstract

Abstract: Formation of macrosegregation of 5 t steel ingots cast in sand molds with and without water-cooled copper tube is simulated by solving macroscopic mass, momentum, species and energy conservation equations with the consideration of shrinkage formation. Predicted macrosegregation pattern of the ingots shows a fair agreement with the experimental data. Both calculations and experiments reveal that some positive segregation patches are formed at the bottom of ingot. With the water-cooled copper tube inserted in the sand mold, the ingot cast has a less intensive macrosegregation. Mechanisms of macrosegregation formation are numerically analyzed. Explanations regarding the influences of fluid flow and temperature change upon the segregation formation are provided.

Key words: Macrosegregation, Water-cooled mold, Fe-C alloy, Numerical simulation

Dongrong LIU, Xiuhong KANG, Baoguang SANG, Dianzhong LI. Numerical study of macrosegregation formation of ingot cast in normal sand mold and water-cooled sand mold[J]. Acta Metallurgica Sinica (English Letters), 2011, 24(1): 54-64.

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Numerical study of macrosegregation formation of ingot cast in normal sand mold and water-cooled sand mold

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