A METHOD FOR MANUFACTURING FERRITIC STAINLESS STEEL HAVING IMPROVED EQUIAXED CRYSTALS IN SLAB

摘要

The invention of the molten steel upper tapped after the injection of oxygen and Ar gases at a AOD (Argon Oxygen De carburization) refining to remove the C, N, and lowering the oxygen of the molten steel casting ladle in the manufacture of ferritic stainless steel for exhaust after removal of the slag by controlling the molten steel oxygen using a ladle treatment process to improve the cast equiaxed jeongyul relates to a method of improving the cast structure.; The present invention provides a ferritic stainless steel for producing through the AOD refining process and the main jorae the treatment step (LT) for the molten metal melted in an electric furnace to this, the final component added to Ti in the main jorae treatment step (LT) the Cr: 10.0 ~ 12wt%, C: 0.02wt% or less, N: 0.015wt% or less, Si: 0.3 ~ 0.7wt%, S: 0.01wt% or less, Ti: 0.1-0.3wt%, and the balance of Fe and unavoidable It provides a polygonal jeongyul the improved ferritic stainless steel production process consisting of impurities.