Mold flux for continuous casting of Ti-containing peritectic steel and continuous casting method

摘要

An object of the present invention is to provide a mold flux capable of preventing occurrence of vertical cracks on the surface of a cast piece in continuous casting of Ti-containing hypaalkaline steel. The mold flux of the present invention is composed of CaO, SiO₂, An oxide of an alkali metal and a fluorine compound as main components, and a Ti content (mass%) in the molten steel is T, f (1) calculated from an initial chemical composition is (1.1-0.5 T) to (1.9-0.5 T), f (2) is 0.05 to 0.40, f (3) is 0 to 0.40, and the molten state The TiO 2 content is 20 mass% or less, and the ratio of the intensity of the first peak of the perovskite to the intensity of the first peak of caspidyne of the mold flux film is 1.0 or less.