Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1988-03-25
1990-02-06
Sheehan, John P.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148112, 148122, H01F 104
Patent
active
048986275
ABSTRACT:
Ultra-rapid annealing of nonoriented electrical steel is conducted at a rate above 100.degree. C. per second on prior to or as part of the strip decarburization and/or annealing process to provide an improved texture and, thereby, improved permeability and reduced core loss. During the ultra-rapid heating of cold-rolled strip, the recrystallization texture is enhanced by more preferential nucleation of {100}<uvw> and {110}<uvw> oriented crystals and reduced formation of {111}<uvw> oriented crystals. The preferred practice has a heating rate above 262.degree. C. per second to a peak temperature between 750.degree. C. and 1150.degree. C. and held at temperature for 0 to 5 minutes.
REFERENCES:
patent: 3144364 (1964-08-01), Robinson et al.
patent: 3948691 (1976-04-01), Matsushita et al.
patent: 4469533 (1984-09-01), Inokuti et al.
patent: 4576658 (1986-03-01), Inokuti et al.
Szymura et al., "The Effect of Heating Rate During Primary Recrystallization", Arch. Hutn., 1978, 23(1), pp. 29-33.
"Improved Sheet Steels by Rapid Annealing", Metal Progress, Apr. 1987, S. L. Semiatin et al., pp. 43-50.
Armco Advanced Materials Corporation
Bunyard R. J.
Fillnow L. A.
Johnson R. H.
Sheehan John P.
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