| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for continuously casting a steel slab, which can use high viscosity powder and can obtain a casting having excellent quality in which generation of surface defects and internal defects in the casting has been prevented, and further oscillation of the molding, which was indispensable until now, can be dispensed with in some cases. SOLUTION: The continuous casting method for steel uses a mold for a mold, which has, on the inside surface of the longitudinal side thereof, a first tapered portion having a taper angle within the range from 0.03°to 10°, a second tapered portion, below the first tapered portion, having a tape angle within the range from 0°to the angle smaller than that of the first tapered portion, the transition point of the two tapered portions located below the molten metal surface within the range from 80 mm to 300 mm, and carries out casting at a casting speed not smaller than 1.5 m/min. Further, preferably, lubricating powder having viscosity within the range from 0.2 to 10 Pas is added to the molten steel in the mold. COPYRIGHT: (C)2004,JPO
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