Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1992-04-22
1993-02-16
Sheehan, John P.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148120, H01F 104
Patent
active
051867630
ABSTRACT:
The present invention relates generally to a non-oriented electrical steel sheet usable as a metallic material for cores incorporated in an electrical apparatus, an electrical equipment or the like and the non-oriented electrical steel sheet is produced, by which a steel slab having a composition comprising Si: 0.1% or more but less than 1.5%, Al: 0.3% or more to 2.0% or less and Si+2Al: 2.0% or more is hot rolled; the hot-rolled steel plate is annealed at a temperature ranging from 1000.degree. to 1200.degree. C.; the annealed hot-rolled steel sheet is cold rolled at a reduction ratio ranging from 85 to 95%, and subsequently, the cold-rolled steel sheet is subjected to finish annealing under conditions of a temperature ranging from 750.degree. to 1000.degree. C. and a time longer than 15 seconds but shorter than 2 minutes.
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patent: 3971678 (1976-07-01), Vlad
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patent: 5102478 (1992-04-01), Hosoya et al.
patent: 5108521 (1992-04-01), Hosoya et al.
patent: 5116435 (1992-05-01), Nishimoto et al.
Patent Abstracts of Japan, vol. 16, No. 128, (C-924), Apr., 1992.
Kubota Takeshi
Nakayama Tadashi
Nippon Steel Corporation
Sheehan John P.
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