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US 6,386,271 B1Granted
Method for continuous casting of steel
AssigneeSumitomo Metal Industries, Ltd.
InventorsMasayuki Kawamoto, Masahito Hanao, Hirohisa Kikuchi, Toshihiko Murakami, Masahiko Oka
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Abstract
A method of continuous casting of a steel employs a mold power having a viscosity of 0.5-1.5 poise at 1,300° C. and a solidification temperature of 1,190-1,270° C., in which the mass ratio of CaO to SiO2 is 1.2-1.9, and casting is carried out under the following conditions: casting speed is 2.5-10 m/minute; mold oscillation stroke is 4-15 mm; and specific cooling intensity in secondary cooling of a slab is 1.0-5.0 liter/kg-steel.
Claims11
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 ¼ width of a cavity of the mold from the inside wall of the mold in the width direction and at a distance of ½ thickness of the cavity of the mold from the inside wall of the mold in the thickness direction.
2 more elements
Dependencies are inferred from the claim text.