| 摘要 |
PURPOSE:To prevent center porocity and to obtain a casting slab having good quality by deciding a solidified end position of the center part and rolling reduction force given on the slab by pouring conditions and pressing at the solidified end position by a prescribed rolling reduction force. CONSTITUTION:The solidified end position 13 of the slab center part is calculated by inputting steel kind, spraying water rate, molten steel temp. and pouring speed into an arithmetic unit 14. Further, the light rolling reduction position and the rolling reduction force by pinch rolls 16 are decided by the above calculated value. This decided light rolling reduction position and rolling reduction force are commanded to a pinch roll apparatus 15, and then the slab is pressed by the prescribed rolling reduction force near the solidified end position. In this way, the center porocity is present and the casting slab having good quality is obtd.
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