GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR PRODUCING THE SAME

• Main Authors: KO HYUN-SEOK, SEO JIN-WOOK
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2023
• 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

To provide a grain-oriented electromagnetic steel sheet having improved magnetism by comprising plural cold rolling and decarbonization annealing steps, and a method for producing the same.SOLUTION: A method for producing a grain-oriented electromagnetic steel sheet has the steps of: heating a slab; hot-rolling the slab to produce a hot-rolled steel sheet; subjecting the hot-rolled steel sheet to hot-rolled sheet annealing; subjecting the hot-rolled steel sheet subjected to the hot-rolled sheet annealing to primary cold rolling; subjecting the steel sheet subjected to the primary cold rolling to decarburization annealing; subjecting the steel sheet completed with the decarburization annealing to secondary cold rolling; subjecting the steel sheet completed with the secondary cold rolling to continuous annealing; and subjecting the steel sheet subjected to the continuous annealing to batch annealing.SELECTED DRAWING: Figure 1 【課題】本発明の目的は、複数の冷間圧延および脱炭焼鈍工程を含むことによって、磁性を向上させた方向性電磁鋼板およびその製造方法を提供することである。【解決手段】本発明による方向性電磁鋼板の製造方法は、スラブを加熱する段階、スラブを熱間圧延して熱延鋼板を製造する段階、熱延鋼板を熱延板焼鈍する段階、熱延板焼鈍された熱延鋼板を１次冷間圧延する段階、１次冷間圧延された鋼板を脱炭焼鈍する段階、脱炭焼鈍が完了した鋼板を２次冷間圧延する段階、２次冷間圧延が完了した鋼板を連続焼鈍する段階、および連続焼鈍された鋼板をバッチ焼鈍する段階を含むことを特徴とする。【選択図】 図１