| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of warpage in an actual caster by precisely predicting the warping amount of a cast slab regardless of an operational condition in a continuous casting. SOLUTION:ΔTdu=(ΔTd-ΔTu) of difference betweenΔTd=(Td-Tdo) andΔTu=(Tu-Tuo), is obtained with the calculation of a solidified heat- conductivity. Wherein, Tdo and Tuo are the respective average temperatures at the lower half part side and the upper half part side in the thickness of the cast slab before cutting off in the end part of a continuous caster, and Td and Tu are the respective average temperatures at the lower half part side and the upper half part side just after cutting off the cast slab carried out from the caster end part. At least one among the surface temperature, a casting speed, a cut-off length and the thickness of the cast slab before cutting off, is adjusted so that the warping amount of the cast slab assumed based on theΔTdu, the cut-off length L and the thickness H of the cast slab, and a linear expansion coefficientα, is included in the preset permissible range.
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