| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a continuous casting method for steel, capable of obtaining the steel with excellent internal quality, in which a generation of center segregation, center porosity and internal cracks is suppressed. <P>SOLUTION: In the continuous casting method for steel, respective pieces of data on the component analysis value and the temperature of molten steel inside a tundish, a casting speed, the amount and the temperature or the like of cooling water for a mold, the amount and the temperature of secondary cooling water, the amount and the temperature of cooling water for a roll and an outside air temperature are collected in real time during a continuous casting operation, model calculation for estimating a solidification state inside a cast slab is performed with the respective pieces of data or the like as parameters, the roll force of a rolling device is controlled in real time on the basis of the solidification state inside the cast slab estimated from the result of the model calculation, and data on the relation of a center solid phase rate of the cast slab and the roll force set beforehand, and the casting speed is controlled such that an area where the center solid phase rate is estimated to be 0.30-0.80 is at the position of the rolling device. <P>COPYRIGHT: (C)2013,JPO&INPIT |
