CAST SLAB FOR BLOMING, AND BLOMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a cast slab capable of reducing wrinkles generated during the bloming, and a bloming method using the cast slab. SOLUTION: The cast slab for bloming has a long side indentation ratio specified by a formula with the mold aspect ratio and the bloming draft as parameters. Preferably, the long side indentation ratio satisfies the formula; Long side indentation ratio <=-0.123×(mold aspect ratio)+0.062×(bloming ratio)+0.0422. In the bloming method, the short side rolling-down of the cast slab in bloming the cast slab is performed at least once based on the average value of 2×Ld/(H0+2B0)×FH/F0 in the long side rolling-down performed to the short side rolling-down and the long side indentation ratio.