Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1977-10-12
1978-09-19
Stallard, W.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148 3155, 148112, 148113, H01F 104
Patent
active
041151615
ABSTRACT:
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; recrystallizing the cold rolled steel at a temperature between 1300.degree. and 1550.degree. F in a hydrogen-bearing atmosphere having a dew point of from +50.degree. to +150.degree. F; decarburizing said steel to a carbon level below 0.005%; applying a refractory oxide base coating to said steel; and final texture annealing said steel. The steel is heated to said temperature range of between 1300.degree. and 1550.degree. F at a heating rate of at least 1500.degree. F per minute and held within said temperature range for a period of at least 30 seconds.
REFERENCES:
patent: 2965526 (1960-12-01), Wiener
patent: 3873381 (1975-03-01), Jackson
patent: 3905842 (1975-09-01), Grenoble
patent: 3905843 (1975-09-01), Fiedler
patent: 3957546 (1976-05-01), Fiedler
patent: 4030950 (1977-06-01), Shilling et al.
patent: 4054471 (1977-10-01), Datta
Allegheny Ludlum Industries, Inc.
Dropkin Robert F.
Gioia Vincent G.
Stallard W.
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