Non-oriented electrical steel sheet and method for manufacturing the same
AssigneePosco
InventorsSe Il LEE, Hun Ju LEE
Life of this patent
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Abstract
A method for manufacturing a non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes performing hot rolling on a slab after heating the slab to manufacture a hot rolled sheet; performing hot rolled sheet annealing on the hot rolled sheet; performing cold rolling on a steel sheet on which the hot rolled sheet annealing is completed to manufacture a cold rolled sheet; and performing cold rolled sheet annealing on the cold rolled sheet in which a difference between a cold rolled sheet annealing temperature in the cold rolled sheet annealing and a hot rolled sheet annealing temperature in the hot rolled sheet annealing is 100° C. or lower.
Claims14
A method for manufacturing a non-oriented electrical steel sheet, the method comprising:
- performing hot rolling on a slab after heating the slab to manufacture a hot rolled sheet;
- performing hot rolled sheet annealing on the hot rolled sheet;
- performing cold rolling on a steel sheet on which the hot rolled sheet annealing is completed to manufacture a cold rolled sheet;
- and
- performing cold rolled sheet annealing on the cold rolled sheet,
- wherein a difference between a cold rolled sheet annealing temperature in the cold rolled sheet annealing and a hot rolled sheet annealing temperature in the hot rolled sheet annealing is 100° C. or lower.
A non-oriented electrical steel sheet, comprising:
- Al:
- 0.0005% to 0.02%, Sn:
- 0.005% to 0.15%, P:
- 0.001% to 0.15% and S:
- 0.0008% to 0.015% in wt % and Fe and impurities as a balance amount.
- (Here, [Al], [Sn], [Sb], [P], and [S] refer to weight percent (%) of Al, Sn, Sb, P, and S, respectively.)
Dependencies are inferred from the claim text.