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

Claim 6:
7. A method for manufacturing the non-oriented electrical steel sheet according to claim 2, comprising:
a process in which molten steel is cast to obtain a slab;
a hot rolling process in which the slab is heated and then hot-rolled to form a hot-rolled steel sheet;
a pickling process in which the hot-rolled steel sheet is pickled to obtain a pickled sheet;
a cold rolling process in which the pickled sheet is cold-rolled to obtain a cold-rolled steel sheet; and
a final annealing process in which the cold-rolled steel sheet is subjected to final annealing,
wherein a pickling solution used in the pickling process contains one or more of Cu, Hg, Ag, Pb, Cd, Co, Zn, and Ni and has a total concentration of respective elements of 0.00001% or more and 1.00000% or less in mass %, a pH of −1.5 or more and 6.0 or less, and a liquid temperature of 15° C. or higher and 100° C. or lower, and pickling is performed for a time of 5 seconds or longer and 200 seconds or shorter for which the hot-rolled steel sheet comes into contact with the pickling solution.