| 摘要 |
PURPOSE:To optimize the quantity of heat extraction from molten steel and to prevent longitudinal cracking defect of an ingot in continuous casting of said ingot by using a mold additive and by operating the oscillation of the mold under the conditions expressed by the mathematical expressions. CONSTITUTION:In the stage of continuously casting steel by using a mold additive, the oscillation of a mold is operated under the conditions of the range expressed by the equationsIand II. In the formulas, tN is the size of the time zone wherein the descending speed of the mold is faster than the speed of the ingot (sec), U is a casting speed (cm/sec), (f) is the frequencies (times/sec) of the mold and S is the oscillation amplitude of the mold (cm). |
