Metal treatment – Compositions – Heat treating
Patent
1982-03-09
1985-01-29
Sheehan, John P.
Metal treatment
Compositions
Heat treating
148404, 148442, 420583, H01F 104
Patent
active
044964021
ABSTRACT:
An Fe-Cr-Co type magnet body of columnar structure having a maximum energy product (BH).sub.max of 7 MGOe or higher consisting essentially of, by weight ratio, 5-30% cobalt, 15-40% chromium, 0.1-10% molybdenum, 0.05-1.2% titanium and 0.1-5% vanadium, with the balance being iron and inevitable impurities, said body having been subjected to columnar-crystallization.
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patent: 4311537 (1982-01-01), Chin et al.
patent: 4324597 (1982-04-01), Kamino et al.
Reed-Hill, Physical Metallurgy Principles Second Edition, 1973, pp. 588 to 593.
McGannon, The Making, Shaping and Treating of Steel, 8th ed., 1964, p. 550.
J. Appl. Phys., vol. 52, No. 3, Mar. 1981, Chin et al., "Low Cobalt Cr-Co-Fe Permanent Magnet Alloys", pp. 2536-2541.
Cobalt, vol. 43, Jun. 1969, Palmer et al., "Production of Columnar Castings in High-Coercivity Magnet Alloys Containing 5-10% Titanium, pp. 64-72.
Cobalt, vol. 54, Mar. 1972, Fontaine et al., "Reaction Mechanisms in the `Magnicol` Process for Producing Columnar Structures in Fe-Al-Ni-Co-Ti Permanent Magnet Alloys", pp. 18-26.
IEEE Transactions on Magnetics, vol. MAG-16, No. 3, May, 1980, Minowa et al., "Further Studies of the Miscibility Gap in an Fe-Cr-Co Permanent Magnet System", pp. 529-533.
AIP Conf. Proc., No. 29, 1975, Kaneko et al., "Fe-Cr-Co Ductile Magnet with (BH) max--8 MGOe", pp. 620-621.
IEEE Transactions on Magnetics, vol. MAG-16, No. 5, Sep. 1980, Jin et al., "Deformation Aged Cr-Co-Cu-Fe Permanent Magnet Alloys", pp. 1050-1052.
Endo Masaji
Hikone Takami
Sheehan John P.
Sumitomo Special Metals Co. Ltd.
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