On the one hand annealing separable medicine null for the tropistic silicon steel sheet

摘要

PURPOSE: To increase the adhensive force to a silicon steel plate and to improve a punching property by specifying the alumina grain size of an alumina slurry and a binder and their addition amounts. ;CONSTITUTION: Any one among starch, cellulose ether, polyvinyl alcohol and polyethylene glycol is added as a water-soluble org. bender to the alumina powder having 1-40μm average grain size by 0.1-2wt.% per alumina to make slurry with water. The slurry is high in stickness to silicon steel plate, therefore oxidation is prevented and the formation of a glass film is prevented by applying the binder and executing a final finishing anneal. Therefore, iron loss is reduced because the steel plate has a mirror surface and the punching property is improved.;COPYRIGHT: (C)1995,JPO