Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1978-03-16
1980-04-29
Rutledge, L. Dewayne
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148 16, 148 27, 148 315, H01F 104
Patent
active
042004772
ABSTRACT:
A process for producing electromagnetic silicon steel having a cube-on-edge orientation. The process includes the steps of: preparing a melt of silicon steel having up to 0.07% carbon, from 0.01 to 0.25% manganese, from 0.01 to 0.09% of material from the group consisting of sulfur and selenium, from 2.5 to 4.0% silicon, up to 1.0% copper, less than 0.009% aluminum and less than 0.0006% boron; casting the steel; hot rolling the steel; cold rolling the steel; normalizing the steel in a hydrogen-bearing atmosphere having a pH.sub.2 O/pH.sub.2 of from 0.015 to 0.3; applying a refractory oxide coating containing an oxide less stable than SiO.sub.2 at temperatures up to 2150.degree. F.; and final texture annealing the steel.
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Datta Amitava
Miller, Jr. Clarence L.
Shilling Jack W.
Allegheny Ludlum Industries, Inc.
Dropkin Robert F.
Gioia Vincent G.
Rutledge L. Dewayne
Sheehan John P.
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