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2 685 708

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(51)

IPC

H01F1/57(2006-01-01)

B22F3/12(2006-01-01)

(21) (22)

Application

2018127393, 2018-07-25

(24)

Start date

2018-07-25

(22)

Actual filing date

2018-07-25

(45)

Published

2019-04-23

(72)

Inventor

Burkhanov Gennadij SergeevichLukin Aleksandr AleksandrovichKolchugina Natalya BorisovnaProkofev Pavel AleksandrovichKoshkidko Yurij SergeevichSkotnitsova Katerina

(73)

Holder

Federalnoe Gosudarstvennoe Byudzhetnoe Uchrezhdenie Nauki Institut Metallurgii I Materialovedeniya Im. A.A. Bajkova Rossijskoj Akademii Nauk Ran)

METHOD FOR PRODUCING HEAT-RESISTANT RARE-EARTH MAGNETS Russian patent published in 2019 - IPC H01F1/57 B22F3/12

Abstract RU 2685708 C1

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of heat-resistant rare-earth magnets. Magnets can be used in automation systems, industrial equipment, automobiles. Performing base alloy melting based on intermetallic compound Nd₂Fe₁₄B and alloy-additives. Alloy-additive used is an alloy of the following chemical composition: REM(Co_1-yCu_y), where REM is one or more elements from the group: Tb, Dy, Ho, z = 1–4; y = 0.2–0.8. Both alloys are subjected to hydride dispersion. Hydride dispersion of alloy-additive is carried out in temperature range of 500–700 °C. Then powders of both alloys are mixed and subjected to fine grinding with subsequent pressing in magnetic field. Compacts are sintered and thermally treated, at heating before sintering in vacuum, maintenance is carried out at temperature of 900–1,000 °C for 1–2 h.

EFFECT: obtained magnets have high magnetic properties.

1 cl, 4 tbl, 1 ex

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RU 2 685 708 C1

Authors

Burkhanov Gennadij Sergeevich

Lukin Aleksandr Aleksandrovich

Kolchugina Natalya Borisovna

Prokofev Pavel Aleksandrovich

Koshkidko Yurij Sergeevich

Skotnitsova Katerina

Dates

2019-04-23—Published

2018-07-25—Filed