METHOD FOR PRODUCING COATED ELECTRICAL STEEL SHEETS HAVING EXCELLENT HABILITY, WELDABILITY, ELECTRICAL INSULATION AND HEAT RESISTANCE

摘要

Coated electrical steel sheets having excellent punchability, weldability and insulation resistance are produced by applying an electrical steel sheet with a treating dispersion obtained by compounding the particle separating resin emullsion and the compatible acid in the particularly defined amount and baking the thus applied steel sheets. To the treating dispersion may be added saccharides or polyhydric alcohols as a reducing agent or boric acid or phosphoric acid.