IN-MOLD FLOW CONTROL METHOD AND IN-MOLD FLOW CONTROL DEVICE IN BENDING CONTINUOUS CASTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an in-mold flow control method and an in-mold flow control device capable of achieving both surface quality and internal component quality in a curved continuous casting apparatus. SOLUTION: An electromagnetic stirrer 6 for forming a swirling flow in a horizontal cross section is installed near a molten metal surface in a mold 1, and a DC magnetic field having a uniform magnetic flux density distribution in the width direction is applied to the lower side thereof in the mold thickness direction. An immersion nozzle 4 having a discharge hole 5 for discharging molten metal toward the short side 3 of the mold is provided together with a DC magnetic field generator (electromagnetic brake 7) to be applied, and the lower end of the discharge hole of the immersion nozzle 4 is a DC magnetic field. Located above the upper end of the core of the generator, the relationship between the injection flow rate Q, the immersion depth L of the immersion nozzle discharge hole, the core thickness D of the electromagnetic stirrer, and the thrust F satisfies equation (1) and the electromagnetic brake. The relationship between the magnetic flux density B, the average flow velocity V of the nozzle discharge hole, and the inner diameter X of the nozzle discharge hole satisfies the equation (2). [Selection diagram] Fig. 1