公开(公告)号：US11021771B2

公开(公告)日：2021-06-01

申请号：US16470078

申请日：2018-01-16

申请人： NIPPON STEEL CORPORATION

发明人： Hiroyoshi Yashiki ,  Yoshiaki Natori ,  Kazutoshi Takeda ,  Susumu Mukawa ,  Takuya Matsumoto ,  Koji Fujita ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC分类号： C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C22C38/60 ,  C22C38/14 ,  C22C38/06 ,  C22C38/00 ,  H01F1/16 ,  C22C38/04

摘要： A non-oriented electrical steel sheet contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.0% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, O: 0.0110% to 0.0350%, Sn: 0% to 0.050%, Sb: 0% to 0.050%, Ti: more than 0% and 0.0050% or less, and a remainder including Fe and impurities, in which Sn+Sb: 0.050% or less, Si−0.5×Mn: 2.0% or more, and an O content in a sheet thickness central portion excluding a surface layer portion which is a range from a front surface and a rear surface to a position of 10 μm in a depth direction is less than 0.0100%.

公开(公告)号：US11053574B2

公开(公告)日：2021-07-06

申请号：US16470122

申请日：2018-01-16

申请人： NIPPON STEEL CORPORATION

发明人： Hiroyoshi Yashiki ,  Yoshiaki Natori ,  Kazutoshi Takeda ,  Susumu Mukawa ,  Takuya Matsumoto ,  Koji Fujita ,  Takashi Morohoshi ,  Masafumi Miyazaki

IPC分类号： C22C38/60 ,  C22C38/00 ,  C22C38/14 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  H01F1/147

摘要： A non-oriented electrical steel sheet according to an aspect of the present invention contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.2% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, one or more of La, Ce, Pr, and Nd: 0.0005% to 0.0200% in total, Ca: 0.0005% to 0.0100%, Ti: 0.0005% to 0.0100%, Sn: 0% to 0.10%, Sb: 0% to 0.10%, Mg: 0% to 0.0100%, and a remainder including Fe and impurities, in which Si−0.5×Mn: 2.0% or more, and Si+0.5×Mn: 3.8% or more.