METHOD FOR COOLING CONTINUOUSLY CAST BLOOM

摘要

PROBLEM TO BE SOLVED: To provide a cooling method capable of preventing the occurrence of surface flaw over the whole surface caused at the time of cooling a continuously cast bloom. SOLUTION: When the bloom cast by a continuous casting is cut into prescribed length, then cooled from the temp. range just above Ar3 transformation point while being placed in the horizontal direction by using a bloom cooler installed at the outside of the continuous casting machine, the bloom is cooled by controlling the water quantity density on the upper surface of the bloom to 5×10<-4> to 4×10<-3> m<3> /sm<2> , that on the side surface thereof to >=1.5 times of that on the upper surface, and that on the lower surface thereof to >=2.0 times of that on the upper surface.