IMPROVEMENT IN THE ELECTROMAGNETIC STEEL PRODUCTION PROCESS TO SILICON AND SILICON STEEL WITH THE CUBIC CELL CORNER ORIENTED IN THE DIRECTION OF LAMINATION

摘要

A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1870 (G/Oe) at 10 oersteds. 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 to a thickness no greater than 0.020 inch; decarburizing said steel to a carbon level below 0.005%; normalizing said steel at a temperature of from 1550 DEG to 2000 DEG F in a hydrogen-bearing atmosphere; applying a refractory oxide base coating to said steel; and final texture annealing said steel.