公开(公告)号：US20240052463A1

公开(公告)日：2024-02-15

申请号：US18267660

申请日：2021-12-15

申请人： POSCO

发明人： Minserk Kwon ,  Woncheol Chung ,  Hokyung Shim ,  Changsoo Park ,  Seonghoon Min

IPC分类号： C22C38/02 ,  C22C38/00 ,  C22C38/60 ,  C22C38/06 ,  C22C38/04 ,  C21D8/12 ,  C21D6/00

CPC分类号： C22C38/02 ,  C22C38/008 ,  C22C38/60 ,  C22C38/06 ,  C22C38/001 ,  C22C38/004 ,  C22C38/04 ,  C21D8/125 ,  C21D6/008 ,  C21D2201/05

摘要： A grain oriented electrical steel sheet according to an embodiment of the present invention comprises: an electrical steel sheet base comprising 2.0 to 7.0 weight % of Si and 0.01 to 0.07 weight % of Sb, and the remainder being Fe and other unavoidable impurities; a fine-grained interfacial layer positioned in a direction toward the inside of the electrical steel sheet base from the surface of the electrical steel sheet base; a base coating layer positioned on the fine-grained interfacial layer; and an insulating coating layer positioned on the base coating layer.
The grain oriented electrical steel sheet according to an embodiment of the present invention satisfies Formula 1 below.


([P]×[PS]+[F]×[FS]+[C]×[CS])/−([S]/2)≥13.0 MPa   [Formula 1]

(wherein [P] is thickness (μm) of the insulating coating layer, [PS] is residual stress (MPa) of the insulating coating layer, [F] is thickness (μm) of the base coating layer, [FS] is residual stress (MPa) of the base coating layer, [C] is thickness(μm) of the fine-grained interfacial layer, [CS] is residual stress (MPa) of the fine-grained interfacial layer, and [S] is thickness (μm) of the electrical steel sheet base)