METHOD FOR DOMAIN REFINEMENT OF ORIENTED SILICON STEEL BY LOW PRESSURE ABRASION SCRIBING

摘要

Patent Attorney's Docket No. RL-1459 Grain-oriented silicon steel having an insulation coating such as a forsterite layer on its outer surface, on which is scribed by a low pressure abrasion technique a predetermined pattern of stripes to expose the metal substrate, in a manner that little or no effect will be experienced with respect to magnetic properties, but will constitute essential preparation for improvement in properties when chemical treatment of the exposed metal stripes is performed.