METHOD FOR REDUCING CENTER SEGREGATION IN CAST SLAB IN CONTINUOUS CASTING FOR STEEL

摘要

PURPOSE: To reduce the center segregation, such as C, P, S, in a cast slab obtd. by continuous casting for steel. ;CONSTITUTION: Electromagnetic stirring devices 7a, 7b, 7c are arranged at the inner part of a mold 1, on the way of a strand and just before squeezing device 8, respectively. The electromagnetic stirring is executed to the unsolidified molten steel in the cast slab 2 in the prescribed magnetic flux density, and also the squeezing is continuously executed at the step before completion of the solidification becoming ≤80mm unsolidified thickness in the cast slab 2 by using the reciprocative moving type squeezing device 8. As the squeezed part becomes equi-axed crystals, the formation of white band is restrained and also, as the squeezed solute elements are diffused into the whole unsolidified molten steel, the segregation can be reduced.;COPYRIGHT: (C)1995,JPO