Patent ID: 9637812
Date: 2017-05-02
CPC Classifications: C21D,C22C,H01F

Claim:
1. A method for manufacturing a non-oriented electrical steel sheet comprising: hot-rolling a slab to obtain a hot-rolled steel sheet, wherein a finish rolling temperature in the hot-rolling is 850° C. or below; after the hot-rolling, cold-rolling the hot-rolled steel sheet to obtain a cold-rolled steel sheet; and after the cold-rolling, finish-annealing the cold-rolled steel sheet for 25 seconds or shorter at 750° C. or below, wherein the slab comprises: Si: 2.8 mass % or more and 4.0 mass % or less; Al: 0.2 mass % or more and 3.0 mass % or less; P: 0.02 mass % or more and 0.2 mass % or less; and 0.5 mass % or more in total of at least one element selected from the group consisting of 4.0 mass % or less of Ni and 2.0 mass % or less of Mn, a C content in the slab is 0.05 mass % or less, a N content in the slab is 0.01 mass % or less, a balance of the slab is composed of Fe and inevitable impurity.