Continuous casting method of Fe base alloy and Ni base alloy and exothermic mold powder for continuous casting

摘要

PROBLEM TO BE SOLVED: To achieve continuous casting for an Fe base alloy and an Ni base alloy having a low liquidus temperature of 1,330 to 1,420°C, while reducing occurrence of surface defects, improving a grinding yield, and reducing a production cost.;SOLUTION: A continuous casting method is provided for an Fe base alloy and an Ni base alloy, characterized in that, when an Fe base alloy and an Ni base alloy are subjected to continuous casting, a pyrogenic mold powder for continuous casting whose chemical components after burning are composed of, by mass, 20 to 26% CaO, 32 to 38% SiO₂, 4.0 to 5.5% F, 3 to 7% Na₂O, 7 to 10% K₂O, 0.1 to 2.5% Al₂O₃, 0.1 to 2% MgO and oxide including inevitably mixed impurities, and having the physical properties of a basicity (CaOmass%/SiO₂mass%) satisfying 0.60 to 0.70, a melting point satisfying 1,050 to 1,150°C and a viscosity of 1.5 to 2.5 poise at 1,300°C is charged to the surface of an alloy molten metal poured into a mold for continuous casting.;COPYRIGHT: (C)2009,JPO&INPIT