METHOD FOR CONTINUOUSLY CASTING AL-LI ALLOY

摘要

PURPOSE:To restrain the development of shrinkage hole and to improve the productivity by executing injection or projection of solid grains at the time of cooling a cast billet drawn from a mold. CONSTITUTION:Molten metal supplied from a nozzle 1 is cooled in the mold 3 circulating cooling water through an inlet 4 and outlet 5 and the solidification is started to make the cast billet 10, and the cast billet is continuously drawn downward. At the exposed place of the cast billet 10 from the mold 3, blasting material injected with pressurized gas of air, etc., from an injection nozzle 8 or projected with impeller 9 is collided to the cast billet 10 to cool the cast billet 10. By this method, the solid-liquid coexisting zone is shortened and the development of the shrinkage hole in the cast billet can be restrained. Further, the casting speed can be increased and even if break out happens, possibility of explosion is eliminated.