METHOD FOR CASTING STAINLESS STEEL OR HIGH ALLOY STEEL

摘要

PROBLEM TO BE SOLVED: To provide a method for casting a stainless steel or a high alloy steel by which the occurrence of pin-hole on the surface layer part of a cast slab is prevented and the occurrence of surface flaw on a billet also can be prevented. SOLUTION: The method for casting the stainless steel or the high alloy steel is provided by whichδ-phase is once generated in a solidifying process and the stainless steel or the high alloy steel having nitrogen content exceeding nitrogen solubility in theδ-phase is cast, and the method is characterized in that hydrogen content in molten steel is set to be <10 ppm. The above casting method provides larger effect by setting sulfur content in the steel to be <20 ppm. A continuous casting method can be applied to the above casting method. COPYRIGHT: (C)2008,JPO&INPIT