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.
LIU Dong-Reng
,
KANG Xiu-Hong
,
SANG Bao-Guang
,
LI Dian-Zhong
. 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
.
DOI: 10.11890/1006-7191-111-54
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