CONTINUOUS CASTING METHOD OF STEEL

PROBLEM TO BE SOLVED: To provide a continuous casting method of a steel where, when, after the drawing of a slab is temporarily stopped for exchange of a tundish or immersion nozzle and again, the drawing is started, and consecutive continuous casting is continued, the surface temperature of the slab in the part corresponding to the secondary cooling zone whose drawing is stopped in the machine is controlled to the prescribed one. SOLUTION: The temperature of a slab 12 occurred by the stop in a continuous casting machine 1 is measured on and after the outlet side of a secondary cooling zone 6, the portion having a temperature lower than the previously set objective temperature is specified, the cooling zone 6a to 6i in the secondary cooling zone as the cause of the occurrence of the low temperature portion is specified, and the cooling water quantity in the specified cooling zone is set in such a manner that the difference between the surface temperature of the slab upon the stop in the machine on and after the following time and the previously set objective temperature reaches ≤50°C. COPYRIGHT: (C)2008,JPO&INPIT