公开(公告)号：US20230392225A1

公开(公告)日：2023-12-07

申请号：US18269435

申请日：2022-03-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Nobusato MORISHIGE ,  Takeru ICHIE ,  Masato YASUDA ,  Masahide URAGO ,  Fuminobu MURAKAMI ,  Daichi HAMADA ,  Atsushi SHIBAYAMA ,  Kazumi MIZUKAMI ,  Daisuke ITABASHI

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

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

Abstract: 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).