Patent ID: 11946123
Assignee: JFE STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H  Y | IPC C

Claim 0:
1. A method of producing a non-oriented electrical steel sheet, the method comprising:
hot rolling a slab having a chemical composition consisting of, in mass %,
C: 0.0050% or less,
Si: 2.0% or more and 6.0% or less,
Mn: 1.0% or more and 3.0% or less,
P: 0.20% or less,
S: 0.0050% or less,
N: 0.0050% or less,
Al: 0.0050% or less, and
one or more selected from the group consisting of B: 0.0001% or more and 0.0050% or less, Nb: 0.0001% or more and 0.0050% or less, and V: 0.0005% or more and 0.0500% or less, with a balance consisting of Fe and inevitable impurities to obtain a hot-rolled sheet;
coiling the hot-rolled sheet;
subjecting the hot-rolled sheet to hot-rolled sheet annealing;
thereafter cold rolling the hot-rolled sheet once or twice with intermediate annealing being performed therebetween, to obtain a cold-rolled sheet; and
subjecting the cold-rolled sheet to final annealing,
wherein the hot-rolled sheet after the hot rolling is cooled at an average cooling rate from 800° C. to 650° C. of 30° C./s or more, and thereafter the coiling is performed at 650° C. or less, and
the hot-rolled sheet after the hot-rolled sheet annealing is cooled at an average cooling rate from 800° C. to 650° C. of 30° C./s or more.