Patent ID: 11970750
Assignee: NIPPON STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H  Y | IPC C

Claim 0:
1. A non-oriented electrical steel sheet including a base material, the base material containing, as chemical components, in mass %,
C: 0.005% or less,
Si: 2.0% or more and 4.5% or less,
Mn: 0.01% or more and 5.00% or less,
a total amount of one or more of S, Se and Te: 0.0003% or more and 0.0050% or less,
Al: 0.01% or more and 5.00% or less,
N: 0.0005% or more and 0.0050% or less, and
P: 1.0% or less,
Cu: 1.0% or less,
Sn: 1.0% or less,
Ni: 1.0% or less,
Cr: 1.0% or less,
Sb: 1.0% or less, with the remainder being Fe and impurities,
wherein, in a cross section of the base material in a sheet thickness direction, a 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 a surface of the base material in the sheet thickness direction is 0.30 pieces/μm2 or less, and
wherein a relationship between the number density N2-5 and a 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)≤0.4  Formula (1).