| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for continuously casting steel by which a mold is suppressed from being damaged at its inside surface so as to extend the service life of the mold, improve productivity, reduce production cost and improve the surface quality of a slab. SOLUTION: In the continuous casting method, by which molten steel is successively poured into a mold 10 having mold copper plates 11 to 14 in which a plating layer 16 essentially consisting of either or both of nickel and cobalt is formed at the inside via an immersion nozzle 24, and, as the molten metal surface of the molten steel in the mold 10 is always covered with mold flux 25, the molten steel is solidified in the mold 10, the content of zinc incorporated into the mold flux 25 is controlled to≤200 ppm, the inclination angle of the central axis in a molten steel discharge hole 28 formed at the immersion nozzle 24 is set to the range of≤5°in the upward direction and to≤45°in the downward direction, and further, casting velocity is controlled in accordance with a thermal load applied to the mold copper plates 11 to 14. COPYRIGHT: (C)2006,JPO&NCIPI
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