FIELD: metallurgy.
SUBSTANCE: steel containing Si is subjected to cold rolling, decarburizing annealing for primary recrystallisation, sheet coiling and coil group annealing for secondary recrystallisation. Steel sheet coil is unwound and straightened. Right between cold rolling and coiling, silicon sheet steel is irradiated by laser beam multiple times in definite intervals from one end to another over sheet width. At secondary recrystallisation, boundaries of grains extending from front surface to rear surface along laser beam paths.
EFFECT: higher density of magnetic flux, lower magnetic loses.
11 cl, 18 dwg, 3 tbl, 2 ex
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