POSCO Holdings Inc.
Method for manufacturing grain-oriented electrical steel sheet

Abstract:

A manufacturing method of an oriented electrical steel sheet according to an exemplary embodiment of the present invention includes: a step of manufacturing a steel slab including one kind or more among Si at 2 to 7%, Sn at 0.03 to 0.10%, and Sb at 0.01 to 0.05% as wt %; a step of hot-rolling the steel slab to manufacture a hot rolled sheet; a step of cold-rolling the hot rolled sheet to manufacture a cold rolled sheet; a step of decarburizing and nitriding the cold rolled sheet for primary recrystallization annealing; a step of coating and drying an annealing separating agent on the primary recrystallization-annealed cold rolled sheet; and a step of secondary recrystallization-annealing the cold rolled sheet coated with the annealing separating agent.