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AssigneeJfe Steel Corporation
InventorsYusuke Shimoyama, Yukihiro Shingaki, Takashi Terashima
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Provided is a method of manufacturing a grain-oriented electrical steel sheet with which a grain-oriented electrical steel sheet with excellent magnetic properties and little variation in iron loss in the longitudinal direction of a coil can be stably manufactured. The method includes subjecting a steel slab to hot-rolling and optionally to annealing, then performing cold rolling once or twice or more to obtain a cold-rolled sheet with a final sheet thickness, and then subjecting the cold-rolled sheet to decarburization annealing and then secondary recrystallization annealing, where immediately before final cold rolling, a steel sheet is heated at a heating rate of 100° C./s or more to a heating temperature of 100° C. or higher and 350° C. or lower, and a time from when the steel sheet reaches the heating temperature to when it is bitten in a first pass of final cold rolling is set to within 5 seconds.
A method of manufacturing a grain-oriented electrical steel sheet, comprising subjecting a steel slab to hot-rolling and optionally to annealing, then performing cold rolling once or twice or more with intermediate annealing performed therebetween to obtain a cold-rolled sheet with a final sheet thickness, and then subjecting the cold-rolled sheet with a final sheet thickness to decarburization annealing and then secondary recrystallization annealing, wherein
Dependencies are inferred from the claim text.