GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND MANUFACTURING METHOD THEREFOR

• Main Authors: LEE Sangwoo, KO Kyungjun
• Format: Patent
• Language: English; Spanish
• Published: 02.07.2024
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INDUCTANCES; MAGNETS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A method for manufacturing a grain-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: hot rolling a slab so as to manufacture a hot rolled sheet, the slab comprising, by wt%, 2.5-4.0% of Si, 0.03-0.09% of C, 0.015-0.040% of Al, 0.04-0.15% of Mn, 0.01% or less of S (excluding 0%), 0.002-0.012% of N, 0.01-0.05% of Sb, 0.03-0.1% of Sn, 0.05-0.2% of Cr and the balance of Fe and inevitable impurities; cold rolling the hot rolled sheet so as to manufacture a cold rolled sheet; performing primary recrystallization annealing on the cold rolled sheet; and performing secondary recrystallization annealing on the steel sheet having undergone primary recrystallization annealing. Un método para fabricar una lámina de acero eléctrico de grano orientado, de acuerdo con una modalidad de la presente invención, comprende los pasos de: laminar en caliente una placa para fabricar una lámina laminada en caliente, la placa que comprende, en % en peso, 2.5-4.0% de Si, 0.03-0.09% de C, 0.015-0.040% de Al, 0.04-0.15% de Mn, 0.01% o menos de S (excluyendo 0%), 0.002-0.012% de N, 0.01-0.05% de Sb, 0.03-0.1% de Sn, 0.05-0.2% de Cr y el resto de Fe e impurezas inevitables; laminar en frío la lámina laminada en caliente para fabricar una lámina laminada en frío; y realizar un recocido por recristalización secundaria en la lámina de acero que tiene recocido por recristalización primaria sometido.