| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method for steel where, in the case steel is subjected to continuous casting by a continuous casting machine provided with a light rolling reduction zone, when a dummy bar head and a bottommost slab pass through the light rolling reduction zone, the variation in the molten metal surface in the molten steel within a casting mold caused by discharging resistance is suppressed. SOLUTION: Regarding the continuous casting method, when the molten steel is continuously cast using a continuous casting machine provided with a light rolling reduction zone composed of two or more pairs of rolls 4A, B for applying rolling reduction force to a slab, at least till the boundary part 18 between a dummy bar head 15 and a bottommost slab 7A passes through the respective rolls in the light rolling reduction zone, the rolling reduction force by the respective rolls in the light rolling reduction zone is not substantially applied to the dummy bar head and the slab. In this way, discharging resistance is reduced, and the variation in the molten metal surface can be suppressed. COPYRIGHT: (C)2006,JPO&NCIPI
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