| 摘要 |
PURPOSE:To cast continuously slabs having no central segregation at all by pouring a molten steel into the central part of a casting mold which moves back and forth, solidifying unidirectionally the molten steel from the base while holding the same and drawing the molten steel from both ends of the mold at the same speed. CONSTITUTION:The molten steel 3 is continuously poured from a tundish 5 via a nozzle 12 into the central part of the casting mold 10 which moves back and forth and while the molten steel 3 poured therein solidifies partially, the molten steel is continuously drawn from both sides at approximately the same speed. The top surface of the molten steel 3 is covered by a heat insulating material 13 so that the molten steel 3 poured into the mold 10 solidifies approximately unidirectionally from the bottom wall of the mold 10 toward the top surface. The slabs drawn from the mold 10 are cooled of the bases and side faces thereof by air cooling or water sprays, by which the unidirectional solidification from the base is further progressed. The molten steel solidifies thoroughly just before drawing devices 14. |
