Solidification structure of 325 mm x 280 mm cast bloom of spring steel 60Si2Mn has been simulated with CAFE module of ProCAST software to study the effect of liquid superheating extent and secondary cooling intensity on structure of solidification of cast bloom. Results showed that with increasing liquid superheating extent from 10 °C to 30
℃
the density of grain in bloom decreased from 1. 055 x 10
6
m
-2
to 1. 520 x 10
5
m
-2
and the columnar crystal obviously developed as liquid superheating extent was 20 ℃. with intensive secondary cooling
the equiaxial crystal zone ratio increased by 5% and the grain density increased from 1. 009 x 10