PURPOSE: To provide a continuous casting apparatus, in which the internal crack in a cast slab continuously cast is reduced and the product having good quality is obtd.
CONSTITUTION: Molten steel (liquid phase) 8 is poured into a mold 2 from a nozzle 1 and continuously cast as the cast slab 7. The upper part of the cast slab 7 is supplied with foot rolls 3 and rolling reduction is executed to the lower part with the rolling reduction rolls 4 and the cast slab is carried. One pair of linear type electromagnets composed of six pieces of iron cores 5 and coils 6 are arranged between the foot rolls 3 and the rolling reduction rolls 4. Electricity is conducted in the coils 6, and by penetrating AC magnetic field into the inner part of the cast slab 7 from the tip parts of the iron cores 5, while fluid-stirring the liquid phase 8 near solid-liquid coexisting zone 10 in the cast slab 7, the casting is executed. In this result, the solid-liquid coexisting zone 10 is remelted at some speed or higher and the thickness in the solid-liquid coexisting zone is thinned and the internal crack can be restrained to be short.
HIRATA KOICHI
YAMANE TAKASHI
