Method of making anisotropic permanent magnets of Mn-Al-C alloys

Details Method of making anisotropic permanent magnets of Mn-Al-C alloys Method of making anisotropic permanent magnets of Mn-Al-C alloys

1975-07-01

1977-10-04

Lanham, C.W.

Metal deforming

By extruding through orifice

29608, 148120, 72467, 72700, 72DIG31, B21C 2300, H01F 100, H01F 702

Patent

active

040517063

ABSTRACT:
Anisotropic permanent magnets of Mn-Al-C polycrystalline alloy are produced by warm extrusion at a temperature of 530.degree. to 830.degree. C utilizing converging or tapered dies with lubricant interposed between the polycrystalline body and the converging die. With dies of rather small semiangles, alloys with improved magnetic properties with regard to (BH)max, and especially Br are obtained.

REFERENCES:
patent: 2971644 (1961-02-01), Sejournet
patent: 3118795 (1964-01-01), Kolbe
patent: 3661567 (1972-05-01), Yamamoto
patent: 3730784 (1973-05-01), Yamamoto
patent: 3771221 (1973-11-01), Bachmann et al.
patent: 3886775 (1975-06-01), Korsell et al.
patent: 3944445 (1976-03-01), Ohtani et al.
patent: 3976519 (1976-08-01), Kubo

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