POSCO Holdings Inc.
METHOD FOR PRODUCING ORIENTED ELECTRICAL STEEL SHEET WITH ULTRA-LOW IRON LOSS

Abstract:

Provided is a method for producing an oriented electrical steel sheet with an ultra-low iron loss. The method for producing an oriented electrical steel sheet according to the present disclosure is a method for producing an oriented electrical steel sheet comprising the processes of performing reheating, hot rolling, hot-rolled sheet annealing, cold rolling, primary recrystallization annealing and secondary recrystallization annealing on a steel slab, whereby a ceramic coating layer is formed by subjecting a gas-phase ceramic precursor to a contact reaction in a plasma state using the atmospheric pressure plasma CVD (APP-CVD) process, on a part of or the entire one or both surfaces of a steel sheet which has been subjected to the primary recrystallization annealing, and then secondary recrystallization annealing is performed thereon.