公开(公告)号：EP4455314A1

公开(公告)日：2024-10-30

申请号：EP22911886.4

申请日：2022-12-20

申请人： POSCO Co., Ltd

发明人： KWON, Ohyeoul ,  KIM, Woosin ,  HAN, Kyuseok

IPC分类号： C21D8/12 ,  C22C38/34 ,  B23K26/364 ,  H01F1/147

摘要： According to an exemplary embodiment of the present invention, a grain oriented electrical sheet includes: a plurality of deformed parts formed on a surface of the electrical sheet along a rolling direction, in which an interval between the deformed parts is changed over an entire length of the sheet in response to an index Ks of sensitivity calculated by Equation 1 below, and at least two areas having a different interval between the deformed parts exist. Ks = 0 .7 × Ds + 0.3 × B8 / 10 (in Equation 1, Ks denotes an index of sensitivity, Ds denotes a particle size of grain (mm), and B8 denotes a magnetic flux density T measured at magnetic field strength of 800 A/m.)

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.