CONTINUOUS CASTING METHOD FOR PREVENTING CAVITY IN CENTRAL PART

摘要

PURPOSE:To prevent thoroughly the generation of a cavity in the central part of a bloom under casting by supplying continuously a bar or wire to the central part of the bloom and subjecting the same to insert-casting. CONSTITUTION:A steel bar or wire 6 is continuously supplied to the central part of a mold 3 in synchronization with the drawing speed of the bloom 7 in the stage of pouring a molten metal from a tundish 2 via an immersion nozzle 5, etc. into the mold 3. the bar or wire 6 is preliminarily connected to the upper part of a dummy bar and is cast together with the boom 7 by an insert-casting system. The bar or wire 6 is preferably of the same material as the molten steel to be cast. Since the bloom 7 cast by this method is occupied with the bar or wire 6 in the central part, the generation of the cavity in the central part is thoroughly obviated.