CONTINUOUS CASTING MACHINE

摘要

PURPOSE:To obtain a defectless slab without forming a negative segregation zone by providing an electromagnetic stirrer or ultrasonic wave impressing device before the point where the solidification of a billet is completed and disposing a forging device of a reciprocating type near the point where the solidification is completed. CONSTITUTION:A molten metal supported by supporting rolls 3 descends from a casting mold 11 and is electromagnetically stirred by an electromagnetic stirrer 9 before the billet completes solidification. The billet is forged by a forging device 7 of a reciprocating type near the point where the solidification is completed. The dendrite cut by the flow of the molten steel by the stirrer 9 settles and an equi-axed crystal region is formed near the crater end. The billet is subjected to continuous forging of the plane by the device 7 in the state of having the equi-axed crystal zone in the central part, by which central segregation is considerably improved. The defectless continuous casting slab is obtd. without forming the negative segregation zone by the above-mentioned method.