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2 623 556

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IPC

B22D27/04(2006-01-01)

(21) (22)

Application

2015153146, 2015-12-10

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Start date

2015-12-10

(22)

Actual filing date

2015-12-10

(45)

Published

2017-06-27

(72)

Inventor

Bujnovskij Aleksandr SergeevichSofronov Vladimir LeonidovichRusakov Igor YurevichMakaseev Yurij NikolaevichMolokov Petr BorisovichKartashov Evgenij Yurevich

(73)

Holder

Federalnoe Gosudarstvennoe Avtonomnoe Obrazovatelnoe Uchrezhdenie Vysshego Professionalnogo Obrazovaniya Issledovatelskij Yadernyj Universitet Mifi)

METHOD FOR PRODUCING PERMANENT NEODYMIUM-IRON-BOR-BASED MAGNETS Russian patent published in 2017 - IPC B22D27/04

Abstract RU 2623556 C2

FIELD: metallurgy.

SUBSTANCE: invention relates to casting permanent magnets of a thickness not exceeding 40 mm from an alloy based on neodymium-iron-boron (Nd-Fe-B) or praseodymium-iron-boron (Pr-Fe-B). The method includes pouring the alloy into a mould and its volume crystallization at a cooling rate of at least 200 deg/min.

EFFECT: due to volume crystallization, an ingot with an ultrafine-grain structure with a grain size of less than 1 mcm is obtained without the use of additional technological processing.

2 dwg

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RU 2 623 556 C2

Authors

Bujnovskij Aleksandr Sergeevich

Sofronov Vladimir Leonidovich

Rusakov Igor Yurevich

Makaseev Yurij Nikolaevich

Molokov Petr Borisovich

Kartashov Evgenij Yurevich

Dates

2017-06-27—Published

2015-12-10—Filed