| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method for a thin cast slab, where generation of cracks and flaws on the surface of the thin cast slab is prevented and the service life of a cooling drum can be sufficiently extended using the continuous casting method of a twin drum type by reducing thermal fluxes from a solidified shell to the cooling drums. SOLUTION: The continuous casting method for a thin cast slab is a continuous casting method of a twin drum type, where a pair of cooling drums 1 are used. Dimples 10 having≥60μm average depth and having≥1,000μm diameter corresponding to a circle are formed adjacently to each other through the top parts of the dimples. Furthermore, fine holes 11 having≥15μm average depth and having≤200μm diameter corresponding to a circle. The atmosphere brought in contact with molten metal is a mixed gas of a gas soluble and a gas insoluble in the molten metal, and the mixing ratio of the gas insoluble is 0.1-25 vol.%. COPYRIGHT: (C)2004,JPO
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