公开(公告)号：EP4450669A1

公开(公告)日：2024-10-23

申请号：EP22907992.6

申请日：2022-12-16

申请人： POSCO Co., Ltd

发明人： KO, Kyungjun ,  SONG, Jaehwa ,  LEE, Sangwoo

IPC分类号： C22C38/34 ,  C22C38/00 ,  C22C38/24 ,  C21D8/12 ,  H01F1/147

摘要： The present invention pertains to a grain-oriented electrical steel sheet and a method for manufacturing same. The grain-oriented electrical steel sheet according to an embodiment of the present invention comprises: by wt%, a base material containing 2.5~4.0 wt% of Si, 0.005 wt% or less of C, 0.015~0.040 wt% of Al, 0.04~0.15 wt% of Mn, 0.005 wt% or less of N, 0.03~0.10 wt% of Sn, 0.05~0.2 wt% of Cr, 0.010~0.050 wt% of P, and 0.01~0.05 wt% of Sb, with the remainder comprising Fe and inevitable impurities; and a metal oxide layer disposed on the base material, and has an average iron loss (W 17/50 ) of 0.80 W/kg or less, wherein the maximum emission intensity ratio of the metal oxide layer may satisfy Expression 1. "> I Cr / I_max Mg ≤ 2 % (In Expression 1, I(Cr) is the intensity of Cr in the metal oxide layer, and I_max(Mg) denotes the maximum emission intensity of Mg in the metal oxide layer)

公开(公告)号：EP4266331A1

公开(公告)日：2023-10-25

申请号：EP21911401.4

申请日：2021-12-16

申请人： POSCO Co., Ltd

发明人： KWON, Ohyeoul ,  KIM, Woosin ,  SONG, Jaehwa

IPC分类号： H01F1/16 ,  C21D8/12 ,  H01F41/02 ,  B23K26/364

摘要： A grain oriented electrical steel sheet, according to one embodiment of the present invention, comprises: linear grooves formed on one surface or both surfaces of the electrical steel sheet in the direction ( X 1 direction) crossing a rolling direction; and punctuated grooves formed on one surface or both surfaces of the electrical steel sheet so as to be arranged in the direction ( X 2 direction) crossing the rolling direction, wherein the plurality of linear grooves and the plurality of punctuated grooves are formed in the rolling direction, and an interval (D3) between the punctuated grooves with respect to an arrangement direction (X 2 direction) of the punctuated grooves is 0.02 to 1.7 times the interval (D2) between the punctuated grooves with respect to the rolling direction.