COMPOZITIE DE ACOPERIRE IZOLATOARE PENTRU TABLA DIN OTEL SILICIOS

摘要

A process for producing electromagnetic silicon steel having a cube-on-edge orientation. The steel has a permeability of at least 1870 (G/Oe) at 10 oersteds and a core loss of no more than 0.720 watts per pound at 17 kilogauss - 60 Hz. The process includes the steps of: preparing a melt of silicon steel containing from 0.02 to 0.06% carbon, from 0.0006 to 0.0080% boron, up to 0.0100% nitrogen, no more than 0.008% aluminum and from 2.5 to 4.0% silicon; casting said steel; hot rolling said steel; cold rolling said steel; decarburizing said steel; applying a refractory oxide coating containing both boron and manganese sulfate; and final texture annealing said steel.