Directional electrical steel sheet and method for producing same

A directional electrical steel sheet according to one embodiment of the present invention is provided with grooves on the surface thereof, wherein the radius of curvature at the point of the greatest groove depth (RBb) is 0.2-100 mum, and the radius of curvature at the groove surface of the point of...

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Bibliographische Detailangaben
Hauptverfasser: LIM CHOONG-SOO, LEE WON-GUL, KWON OH-YEOUL, PARK JONG-TAE, HONG SEONGOL, LEE GYOO-TAEK
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:A directional electrical steel sheet according to one embodiment of the present invention is provided with grooves on the surface thereof, wherein the radius of curvature at the point of the greatest groove depth (RBb) is 0.2-100 mum, and the radius of curvature at the groove surface of the point of greatest groove depth to the point of of the groove depth (D) (RSb) is 4-130 mum. 根据本发明的实施例的取向电工钢板,在其表面形成有凹槽,在所述凹槽,凹槽最深处的曲率半径(RBb)是0.2μm至100μm,凹槽最深处至凹槽的1/4深度(D)之处的凹槽表面的曲率半径(RSb)是4μm至130μm。