Manufacture and application of a Cr-free insulation coat for non-oriented silicon steel sheets

摘要

The manufacturing techniques of a Cr-free coat for non-oriented silicon steel sheets with excellent magnetic properties were developed.The ingredients of the coat mainly include phosphate,epoxy resin,an amine solidified agent and water.Through the adjustment of ingredients,superior adhesiveness,corrosion-resistance performance,welding performance and stamping preformance have been obtained.Thus,the non-oriented silicon steel sheets with the above Cr-free coat have been used successfully in the fields of compressors,transformers,and small and medium motors.