GRAIN ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD OF THE SAME

• Main Authors: SONG DAE HYUN, PARK JUNE SOO, YANG IL NAM
• Format: Patent
• Language: English; Korean
• Published: 09.06.2020
• 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

Provided are a grain-oriented electrical steel sheet in which magnetic properties are improved by appropriately controlling the contents of Mn, Cr, Sn, and Sb, and a method for manufacturing the same. The grain-oriented electrical steel sheet according to one embodiment of the present invention includes: 2.0 to 6.0 wt% of Si; 0.12 to 1.0 wt% of Mn; 0.01 to 0.05 wt% of Sb; 0.03 to 0.08 wt% of Sn; 0.01 to 0.2 wt% of Cr; and the balance Fe and unavoidable impurities. The grain-oriented electrical steel sheet satisfies the following expression 1, 4×[Cr]-0.1×[Mn] >= 0.5×([Sn]+[Sb]), where [Cr], [Mn], [Sn], and [Sb] represent the contents (wt%) of Cr, Mn, Sn, and Sb, respectively. 본 발명의 일 실시예에 의한 방향성 전기강판은 중량%로, Si: 2.0 내지 6.0%, Mn: 0.12 내지 1.0%, Sb:0.01 내지 0.05%, Sn: 0.03 내지 0.08% 및 Cr: 0.01 내지 0.2%를 포함하고, 잔부 Fe 및 불가피한 불순물을 포함하고 하기 식 1을 만족한다. [식 1] 4×[Cr]-0.1×[Mn] ≥ 0.5×([Sn]+[Sb]) (식 1에서, [Cr], [Mn], [Sn] 및 [Sb]는 각각 Cr, Mn, Sn, Sb의 함량(중량%)를 나타낸다.)