公开(公告)号：EP4269651A1

公开(公告)日：2023-11-01

申请号：EP21911379.2

申请日：2021-12-15

申请人： POSCO Co., Ltd

发明人： KWON, Minserk ,  CHUNG, Woncheol ,  SHIM, Hokyung ,  PARK, Changsoo ,  MIN, Seonghoon

IPC分类号： C23C22/07 ,  C23C22/74 ,  C22C38/02

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 (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)