METHOD FOR CONTINUOUSLY CASTING STEEL

摘要

PROBLEM TO BE SOLVED: To secure the stability of casting by controlling the cooling in a mold during casting and to cast a cast slab having little surface defect. SOLUTION: The inner temperature (TCu) of a mold copper plate is measured with a temperature measuring element 6 embedded into the mold copper plate 4, and the surface temperature (T deg.f) of a mold flux film 3 is measured with a temperature measuring sensor 7 embedded in the vicinity of the temperature measuring element. Heat flux (Q) passing through the mold copper plate is calculated by using the measured inner temperature (TCu) of the mold copper plate and the surface temperature (T deg.Cu) of the mold copper plate is calculated by using the calculated heat flux (Q) and the inner temperature (TCu) of the mold copper plate. The heat resistance of the interface between the mold flux film and the mold copper plate is calculated by using the calculated surface temperature (T deg.Cu) of the mold copper plate and the measured surface temperature (T deg.f) of the mold flux film, and casting is performed while controlling the casting condition so that this heat resistance falls in the range of 1×10-4-1.3×10-3 m2.k/W.