NON-ORIENTED ELECTRICAL STEEL SHEET, MANUFACTURING METHOD THEREFOR, AND MOTOR CORE COMPRISING SAME

A non-oriented electrical steel sheet according to one embodiment of the present invention comprises: a steel sheet base material comprising, by wt%, 1.0-6.5% of Si, 0.1-1.3% of Al, 0.3-2.0% of Mn and the balance of Fe and inevitable impurities; and an insulation film positioned on the steel sheet b...

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Sprache:eng ; fre ; kor
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Zusammenfassung:A non-oriented electrical steel sheet according to one embodiment of the present invention comprises: a steel sheet base material comprising, by wt%, 1.0-6.5% of Si, 0.1-1.3% of Al, 0.3-2.0% of Mn and the balance of Fe and inevitable impurities; and an insulation film positioned on the steel sheet base material, wherein the steel sheet base material satisfies the following formula 1 and the insulation film satisfies the following formula 2. [Formula 1] 0.1 ≤ [Mn(1)] / [Mn(10)] ≤ 1.0 [Formula 2] [Fe] ≥ ([Al] + [Mn] + [Mg] / 10 (In formula 1, [Mn(1)] is the concentration (wt%) of Mn at a depth of 1 μm from the interface between the base material and the insulation film toward the inside of the base material, and [Mn(10)] represents the concentration of Mn at a depth of 10 μm. In formula 2, [Fe], [Al], [Mn] and [Mg] represent the amounts (wt%) of Fe, Al, Mn and Mg at the center, in the thickness direction, of the insulation film.) Une feuille d'acier électrique non orientée selon un mode de réalisation de la présente invention comprend : un matériau de base de feuille d'acier comprenant, en % en poids, 1,0 à 6,5 % de Si, 0,1 à 1,3 % d'Al, 0,3 à 2,0 % de Mn et le reste étant du Fe et des impuretés inévitables ; et un film d'isolation positionné sur le matériau de base de feuille d'acier, le matériau de base de feuille d'acier satisfaisant la formule 1 suivante et le film d'isolation satisfaisant la formule 2 suivante. [Formule 1] 0,1 ≤ [Mn (1)]/[Mn (10)] ≤ 1,0 [Formule 2] [Fe] ≥ [Al] + [Mn] + [Mg]/10. (Dans la formule 1, [Mn(1)] est la concentration (% en poids) de Mn à une profondeur de 1 µm à partir de l'interface entre le matériau de base et le film d'isolation vers l'intérieur du matériau de base, et [Mn(10)] représente la concentration de Mn à une profondeur de 10 µm. Dans la formule 2, [Fe], [Al], [Mn] et [Mg] représentent les quantités (% en poids) de Fe, Al, Mn et Mg au centre, dans le sens de l'épaisseur, du film d'isolation.) 본 발명의 일 실시예에 의한 무방향성 전기강판은 중량%로, Si : 1.0 내지 6.5%, Al : 0.1 내지 1.3%, Mn : 0.3 내지 2.0% 및 잔부 Fe 및 불가피한 불순물을 포함하는 강판 모재 및 강판 모재 상에 위치하는 절연 피막을 포함하고, 강판 모재는 하기 식 1을 만족하고, 절연 피막이 하기 식 2를 만족한다. [식 1] 0.1 ≤ [Mn(1)] / [Mn(10)] ≤ 1.0 [식 2] [Fe] ≥ ([Al] + [Mn] + [Mg] / 10 (상기 식 1에서 [Mn(1)]는 모재 및 절연 피막의 경계면으로부터 상기 모재의 내부 방향으로, 1㎛ 깊이에서의 Mn 농도(중량%)이고, [Mn(10)]는 10㎛ 깊이에서의 Mn 농도를 나타낸다. 식 2에서 [Fe], [Al], [Mn] 및 [Mg]는 절연 피막 두께방향 중심에서 Fe, Al, Mn 및 Mg의 함량(중량%)을 나타낸다.)