Magnetic properties and workability of 6.5% Si steel sheet

NKK led the world in the construction of a continuous production line for manufacturing 6.5% silicon steel sheet in coil form using a CVD siliconizing process. The product is a non-oriented, 6.5% silicon steel sheet with an iron loss of W1/10k = 9.25 W/kg (0.1 mm thick) and excellent soft magnetic properties. The workability of this product was improved by preventing oxidation of the source materials during manufacture. NKK recently succeeded in manufacturing 0.05 mm thick 6.5% silicon steel sheet in coil form. Cut cores from this material have a very low iron loss at high frequencies that is superior to that obtainable with 0.025 mm Fe-based amorphous materials.