Silicon steel and processing therefore

Details Silicon steel and processing therefore Silicon steel and processing therefore

1977-12-27

1979-07-10

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 3155, 148113, H01F 104

Patent

active

041606817

ABSTRACT:
A process for producing electromagnetic silicon steel having a cube-on-edge orientation. The steel has a permeability of at least 1870 (G/O.sub.e) 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.

REFERENCES:
patent: 3054732 (1962-09-01), McQuade
patent: 3522108 (1970-07-01), Yamamoto et al.
patent: 3676227 (1972-07-01), Matsumoto et al.
patent: 3700506 (1972-10-01), Tanaka et al.
patent: 4030950 (1977-06-01), Shilling
patent: 4054471 (1977-10-01), Datta

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