MOLD POWDER FOR CONTINUOUS CASTING OF ULTRA-LOW CARBON STEEL AND METHOD OF CONTINUOUS CASTING

摘要

To provide a mold powder for continuous casting of an ultra-low carbon steel capable of suppressing an entrainment into a molten steel, and a method of continuous casting using the same.SOLUTION: A mold powder for continuous casting of an ultra-low carbon steel, having a C content of 0.0030 mass% or less, has a mass concentration ratio SiO/AlOof SiOto AlOof lower than 1.0, a mass concentration ratio CaO/SiOof CaO to SiOof 0.9-1.5, a CaO content of 30 mass% or more, a solidification temperature of 1000-1200°C, and a viscosity of 1.0-2.0 Pa s at 1300°C. A method of continuous casting for an ultra-low carbon steel uses the mold powder.SELECTED DRAWING: Figure 1