Stress-relieving-annealing-resistant low iron loss-particle-oriented silicon steel manufacturing method

摘要

The following steps are disclosed for producing a low iron loss particle-oriented silicon steel with stress-relieving-annealing-resistance: the method is after cold rolling by pulse laser, or after decarburization annealing or after high-temperature annealing or high-temperature drawing, Further comprising the step of performing scanning grooving on one or both surfaces of the resulting silicon steel sheet after temper rolling and annealing, and forming grooves parallel to each other in the rolling direction of the silicon steel sheet, wherein the pulse The single pulse time width of the laser is 100 ns or less, and the peak energy density of the single pulse is 0.05 J/cm 2 or more; The energy density of a single laser beam is 1 J/cm ² to 100 J/cm ² ; The beam spot of the pulsed laser is a single beam spot or a combination of multiple beam spots, the shape of the beam spot is circular or elliptical, the diameter of the beam spot in the scanning direction is 5 μm to 1 mm, and the direction perpendicular to the scanning direction The diameter of the beam spot is 5 μm to 300 μm; When scanning grooving is performed at the same position on the silicon steel sheet, the product of the number of beam spots and the scan time of the pulsed laser is 5 or more.