| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method which can prevent the periodic fluctuation of the molten steel level in a mold, and the generation of longitudinal cracks in the surface of a slab. SOLUTION: In casting the slab of a rectangular section and of 80-120 mm in thickness using a perpendicular bending mold continuous casting machine, the cooling is started immediately behind the mold outlet side, the slab is cooled under the condition that 50-60 mass % of the total water to be used in the secondary cooling of the slab from the slab outlet side to the point at 3 m in the casting direction, and the slab is cooled under the condition that the water quantity density per unit area of the long side of the slab on both sides is 300-500 liter/m2.min.
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