ELECTROMAGNETIC STIRRING METHOD IN CONTINUOUS CASTING FOR REDUCING SEGREGATION CENTER OF MARTENSITIC STAINLESS STEEL

摘要

PURPOSE: An electromagnetic stirring method is provided which reduces segregation center by stirring the molten steel in both directions using an electromagnetic stirring apparatus instead of the method of stirring molten steel in one direction. CONSTITUTION: In a method for continuous casting a steel billet by applying electromagnetic stirring to non-solidified molten steel of a steel billet using an electromagnetic stirring apparatus of the lower part of the mold as continuously supplying martensitic stainless molten steel received in a Tundish to a mold, the electromagnetic stirring method in the continuous casting for reducing segregation center of martensitic stainless steel comprises the process of repetitiously electromagnetic stirring the molten steel to both sides using the electromagnetic stirring apparatus, wherein the electromagnetic stirring further comprises the steps of electromagnetic stirring the molten steel in one direction for 8 to 20 seconds; stopping the stirring for less than 2 seconds; electromagnetic stirring again the molten steel in an opposite direction for 8 to 20 seconds, thereby forming a vortex in an opposite direction; and repeating the above steps.