GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

• Main Authors: PARK CHANG SOO, HAN KYU SEOK, PARK YUJUN, KIM JAE KYOUM
• Format: Patent
• Language: English; Korean
• Published: 06.04.2020
• 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

One embodiment of the present invention is to provide a grain-oriented electrical steel sheet with improved magnetic properties and productivity and a manufacturing method thereof. A grain-oriented electrical steel sheet according to one embodiment of the present invention includes: 2.0 to 4.5 wt% of Si; equal to or less than 0.005 wt% (excluding 0 wt%) of C; 0.005 to 0.05 wt% of Mn; equal to or less than 0.0005 wt% (excluding 0 wt%) of S; 0.01 to 0.1 wt% of Se; and the balance Fe and unavoidable impurities. In addition, the grain-oriented electrical steel sheet satisfies the following equation 1, 3 × [Mn] >= [Se] >= 1.5 × [Mn], where [Mn] and [Se] represent the contents (wt%) of Mn and Se, respectively. 본 발명의 일 실시예에 의한 방향성 전기강판은 중량 %로, Si: 2.0 내지 4.5%, C: 0.005%이하 (0%를 제외함), Mn: 0.005 내지 0.05%, S: 0.0005% 이하 (0%를 제외함), Se: 0.01 내지 0.1% 및 잔부는 Fe 및 불가피한 불순물을 포함하고, 하기 식 1을 만족한다. [식 1] 3×[Mn] ≥ [Se] ≥ 1.5×[Mn] (식 1에서, [Mn] 및 [Se]는 각각 Mn 및 Se의 함량(중량%)을 나타낸다.)