METHOD FOR CONTROLLING INCLUSIONS OF AUSTENITIC STAINLESS STEEL

摘要

PURPOSE: A method for controlling inclusions of austenitic stainless steel is provided to improve resistance as well as impact toughness on pitting corrosion under chloride environment by substituting silicate with alumina, and removing sulfides. CONSTITUTION: A method for controlling inclusions of austenitic stainless steel comprises the steps of reducing silicate into alumina in stainless steel by adding Al after deoxidizing stainless steel with Si in a finery, removing slag through skimming operation, and removing sulfides by adding Ca. The Al is added in an amount of 60 parts per million. The method for controlling inclusions of austenitic stainless steel further comprises the step of adding Al before adding Ca and after removing the slag. The Ca is added in an amount of 15 parts per million or less. Austenite type stainless steel can improve resistance and impact toughness on pitting corrosion under chloride environment by the method for controlling inclusions of austenitic stainless steel.