FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy. To improve magnetic characteristics of sheet of oriented-grain electric steel and eliminate crescent deformation, method includes: laser treatment process, where a laser-treated portion is formed by laser radiation of an area on one end side of steel sheet in direction of width, after treatment during cold rolling, with a laser beam along steel sheet rolling direction; and final annealing process, in which steel sheet with laser-treated portion formed thereon is wound in form of a roll and final annealing is performed on rolled steel sheet.
EFFECT: during laser treatment of melting and repeated hardening portion having depth of more than 0 % and equal or less than 80% of plate thickness on steel sheet, is formed by laser beam irradiation in a position corresponding to laser-treated portion.
16 cl, 1 tbl, 18 dwg
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