METHOD FOR MANUFACTURING PERMANENT MAGNETS FROM RARE- EARTH-METAL-IRON-BORON ALLOYS Russian patent published in 1998 - IPC

Abstract RU 2117349 C1

FIELD: manufacture of permanent magnets. SUBSTANCE: permanent magnets are produced by mixing up two crushed alloys with different content of rare-earth metals, iron, and boron in proportion ensuring the following content of ingredients in finished magnet, mass percent: rare- earth metals - 32-36; boron - 0.9-1.4; iron - the rest; powder is then pressed in magnetic field, baked, and subjected to heat treatment. Alloys of the following composition are used for manufacturing magnets, mass percent: basic alloy - rare-earth metals, 26-40; boron, 2-4; iron, the rest; auxiliary alloy - rare-earth metals, 12-60; boron, 0.5-1; iron, the rest. Auxiliary-alloy powder is added to main- alloy powder during second half-cycle of its fine milling process. EFFECT: enlarged spectrum of alloys for producing permanent magnets of proposed composition and improved characteristics of magnets obtained. 3 tbl

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RU 2 117 349 C1

Authors

Khandorin G.P.

Kondakov V.M.

Skripnikov V.V.

Samsonov V.M.

Kachurovskij A.N.

Ljalin V.N.

Velikorechanin S.V.

Beljaev Ju.E.

Bujnovskij A.S.

Sofronov V.L.

Shtefan Ju.P.

Bujnovskij P.A.

Dates

1998-08-10Published

1997-05-20Filed