| 摘要 |
PROBLEM TO BE SOLVED: To provide a dipping nozzle capable of slowing the flow of molten steel in a mold, forming the uniform flow, preventing generation of defects such as bubbles and inclusions, and realizing high-speed casting, and a continuous casting method using the dipping nozzle. SOLUTION: In the dipping nozzle 10 having a cylindrical part 12 through which molten steel 11 passes from a top to a bottom, and a pair of right and left discharge ports 13 and 14 which are provided on a lower portion thereof capable of discharging the molten steel 11 in the transverse direction, hood parts 15 and 16 capable of guiding the flow of the molten steel 11 discharged from the discharge ports 13 and 14 are provided on either or each of at least upper and lower parts of the discharge ports 13 and 14, and the ratio D2/D1 is 0.8-1.2, where D1 denotes the inside diameter of a portion except the lower part of the cylindrical part 12, and D2 denotes the space between the discharge ports 13 and 14. In the continuous casting method, the molten steel 11 is poured into a mold 41 via the dipping nozzle 10, and drawn from the mold 41 at a casting speed of≥0.6 m/min. while the molten steel is solidified. COPYRIGHT: (C)2005,JPO&NCIPI
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