Patent ID: 6386271
Filing Date: 2002-05-14
Classification: B22D

Abstract:
A method for continuously casting of a steel, which comprises a steps of:casting a steel into a slab while using a mold powder having a viscosity of 0.5 to 1.5 poise at 1,300 degrees C, a solidification temperature of 1,190 to 1,270 degrees C, and a mass ratio CaO/SiO2 of 1.2 to 1.9, determining casting speed from 2.5 to 10 m/minute, wherein a mold oscillation stroke in a vertical direction is 4 to 15 mm, and a specific cooling intensity in secondary cooling of a slab is 1.0 to 5.o liter/kg-steel specific water flow rate, wherein a mean flow rate of molten metal in a horizontal direction is 20 to 50 cm/second, and the maximum flow rate of a molten in a horizontal direction is 120 cm/second in a meniscus of molten steel at a position which is located at a distance of Â¼ width of a cavity of the mold from the inside wall of the mold in the width direction and at a distance of Â½ thickness of the cavity of the mold from the inside wall of the mold in the thickness direction.