| 摘要 |
PURPOSE:To cheaply manufacture a clean ingot having no inner crack or segrega- tion, by reforming at less than a fixed bending radius by adding the external energy and flowing the molten steel at the interface of solidified phase and unsolidified phase and then, changing the guiding direction of the ingot at the time of drawing out the molten steel having solidified outer surface. CONSTITUTION:Molten steel is continuously poured into the mold and is drawn out at >=1m/min. ingot drawing speed of an ingot the outer circumference. On this occasion, energy, such as electromagnetic force etc., is added from the outside and reformation is performed at <=6m bending radius flowing the molten steel at the interface of solidified layer and unsolidified layer, that is, before bending reform point and then, guiding direction of the ingot is changed. As a result of it, flowing of the molten steel is made easy to bring about and accordingly, sufficient resisting power against the bending reform strain, is secured and then, a good ingot, obtained. Besides, ultra low head continuous casting of <=6m radius of curvature, is made possible by using said method and the cost of equipment is sharply reduced and maintenance and workability are rapidly improved. |
