| 摘要 |
A cooling method and a cooling mold in a continuous casting wherein even if a continuous casting rate is increased, a proper cooling is carried out to prevent a danger of a breakout, so as to improve the stability of the casting and the high quality of an ingot. A cooling mold comprises water cooling jackets which are provided in the inner part of the mold, a first cooling water jetting mouth which is arranged at a distance of 15 to 40 mm from a meniscus, and a second cooling water jetting mouth which is arranged at an interval of 20 to 45 mm between a contact position of a primary cooling water and an other contact position of a secondary cooling water on an ingot. By use of the cooling mold wherein a primary and a secondary cooling water impinging angles are respectively set at 15 to 30 degrees and at 30 to 60 degrees, the primary cooling water is impinged from the first cooling water jetting mouth to a molten metal which is cooled with the inner surface of the cooling mold to carry-out a primary cooling, and nextly, the secondary cooling water is impinged from the second cooling water jetting mouth to initial zones of a transition boiling zone and a film boiling zone which are produced with the impingement of the primary cooling water, so that a vapor film generated in the transition boiling zone and the film boiling zone is broken out to provoke a nucleate boiling so as to carry-out a direct secondary cooling with the secondary cooling water.
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