Study on the effect of stacking slow-cooling before rolling on the center-segregation of continuous casting slab

The effect of stacking slow-cooling before rolling on the center-segregation of continuous casting slab was investigated in this paper. By the macroscopic sulphur print test over the cross section of testing slabs as well as analyzing the chemical compositions of the samples along the thickness direction and obversing the cross section structure of rolled plate it is found out that the effect of stacking slow-cooling before rolling on the center carbon segregation in the slab and the band structure in the rolled plate is obvious. The grade of center-segregation in the casting slab after 48 hours stacking slow-cooling decreased from C2.0 to C1.5; the band structure on the cross section of the plate rolled from the casting slab after 36 hours stacking slow-cooling is obviously slighter than that in the casting slab after 24 hours stacking slow-cooling and there is no significant pearlite band structure throughout the view field.