公开(公告)号：US11970750B2

公开(公告)日：2024-04-30

申请号：US18269435

申请日：2022-03-31

申请人： NIPPON STEEL CORPORATION

发明人： Nobusato Morishige ,  Takeru Ichie ,  Masato Yasuda ,  Masahide Urago ,  Fuminobu Murakami ,  Daichi Hamada ,  Atsushi Shibayama ,  Kazumi Mizukami ,  Daisuke Itabashi

IPC分类号： C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC分类号： C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C21D8/1277 ,  C21D9/46 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： There is provided a non-oriented electrical steel sheet in which, in a cross section of a base material in a sheet thickness direction, the number density N2-5 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range of 2.0 to 5.0 μm from the surface of the base material in the sheet thickness direction is 0.30 pieces/μm2 or less, and the relationship between the number density N2-5 and the number density N0-2 of precipitates with an equivalent circle diameter of 50 to 500 nm present in a range from the surface of the base material to 2.0 μm satisfies Formula (1):

(N2-5)/(N0-2)≤0.5  Formula (1).