FIELD: metallurgy.
SUBSTANCE: grooves are made on electric steel sheet surface each having the preset length and being elongated in direction perpendicular to sheet feed. Note here that said grooves are formed at preset intervals by scanning the sheet surface by laser beam. Laser beam is a continuous radiation laser beam with wavelength λ of 1.0 mcm to 2.1 mcm, power density Pd [W/mm2] obtained by division of laser beam intensity P by focused beam area S making 5×105 W/mm or higher. Note here that power density Pd [W/mm2] and scanning rate V [mm/s] of laser beam focused spot on steel sheet delivers the relationship 0.005×Pd+3000≤V≤0.005×Pd+40000.
EFFECT: decreased magnetic losses in texture sheet.
9 cl, 7 dwg, 1 tbl
