SU549266A1 - A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt - Google Patents
A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobaltInfo
- Publication number
- SU549266A1 SU549266A1 SU2167847A SU2167847A SU549266A1 SU 549266 A1 SU549266 A1 SU 549266A1 SU 2167847 A SU2167847 A SU 2167847A SU 2167847 A SU2167847 A SU 2167847A SU 549266 A1 SU549266 A1 SU 549266A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- cobalt
- permanent magnets
- rare earth
- earth metals
- compounds
- Prior art date
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- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Description
Изобретение относитс к порошковой металлургии , в частности к производству посто нных магнитов на основе соединений редкоземельных металлов с кобальтом.The invention relates to powder metallurgy, in particular, to the production of permanent magnets based on compounds of rare earth metals with cobalt.
Известен способ изготовлени посто нных магнитов из соединени SmCos, включающий спекание и охлаждение от температуры спекани до комнатной в вакууме или защитной атмосфере 1.A known method of making permanent magnets from an SmCos compound includes sintering and cooling from sintering temperature to room temperature in a vacuum or protective atmosphere 1.
Недостатком известного способа вл етс необходимость применени герметичных систем в св зи с высокой окислительной способностью соединений редкоземельных металлов с кобальтом.A disadvantage of the known method is the necessity of using hermetic systems in connection with the high oxidizing ability of rare-earth metal compounds with cobalt.
Наиболее близким по технической сущности и достигаемому эффекту вл етс способ изготовлени посто нных магнитов на основе соединений редкоземельных металлов с кобальтом , включающий спекание и охлаждение в инертной атмосфере от температуры спекани до 800-900° С, выдержку при этой температуре и охлаждение до комнатной температуры 2.The closest in technical essence and the achieved effect is a method of producing permanent magnets based on rare earth metals with cobalt, including sintering and cooling in an inert atmosphere from sintering temperature to 800-900 ° C, holding at this temperature and cooling to room temperature 2 .
Недостатком известного способа изготовлени вл етс необходимость применепи герметичных систем и низка воспроизводи мость свойств магнитов, изготовленных этим способом.A disadvantage of the known method of manufacture is the need to apply hermetic systems and the reproducibility of the properties of the magnets produced by this method is low.
Целью изобретени вл етс упрощение режима термической обработки и улучшениеThe aim of the invention is to simplify the mode of heat treatment and improve
воспроизводимости свойств посто нных магнитов .reproducibility properties of permanent magnets.
Дл достижени этой цели предложен способ изготовлени спеченных посто нных магПИТОВ на основе соединений редкоземельных металлов с кобальтом, отличающийс от известного тем, что спеченные заготовки подвергают алитированию, & термическую обработку провод т на воздухе.To achieve this goal, a method has been proposed for the manufacture of sintered permanent magPITs based on rare earth metals with cobalt, which differs from the known fact that the sintered blanks are subjected to aluminizing, & heat treatment is carried out in air.
Нредложенный способ осуществл ют следующим образом.The foregoing method is carried out as follows.
На поверхности спеченных при И 20° С 1 час в вакууме 10 мм рт. ст. Sm-Со магнитов создают защитный слой путем электролитического алитировани в расплаве солей 35% NaCl - 15% NaF - 35% KCl - 15% А1Рз при плотности тока 0,3 Л/сж и температуре 800°С в течение 10-15 мин. В качестве растворимого анода используют металлический алюминий, катодом служит магнит , укрепленный на молибденовой подвеске. Алитированные магниты на воздухе нагревают до 1100° С 20 мин, охлаждают до 900° С в течение часа, выдерживают 3 часа и охлаждают в CTipye воздуха.On the surface of sintered at And 20 ° C 1 hour in vacuum 10 mm Hg. Art. Sm-С magnets create a protective layer by electrolytic aliasing of 35% NaCl - 15% NaF - 35% KCl - 15% A1Pz in the molten salt at a current density of 0.3 L / s and a temperature of 800 ° C for 10-15 minutes. Metallic aluminum is used as a soluble anode; a magnet mounted on a molybdenum suspension serves as the cathode. The altered magnets in air are heated to 1100 ° C for 20 minutes, cooled to 900 ° C for one hour, kept for 3 hours and cooled in CTipye air.
Предложенным способом была изготовлена сери магнитов, при этом все магниты имели следующие свойства:The proposed method was made a series of magnets, with all the magnets had the following properties:
Остаточна индукци Вг, Гс 8900-9100Residual induction Br, Gs 8900-9100
Коэрцитивна сила ьИс, Э 8700-8800Coercive force, E 8700-8800
Коэрцитивна сила Нс, Э Больше 26000 Критическое поле Яд, Э 17000-18000 Максимальна магнитна Coercive force Ns, E More than 26000 Critical field Poison, E 17000-18000 Maximum magnetic
энерги (ВН) max. Гс . Э (19,5-20) . Ю.energy (HV) max. Gs. E (19.5-20). YU.
,.,-.-,;., -.- ,;
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU2167847A SU549266A1 (en) | 1975-08-21 | 1975-08-21 | A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU2167847A SU549266A1 (en) | 1975-08-21 | 1975-08-21 | A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt |
Publications (1)
Publication Number | Publication Date |
---|---|
SU549266A1 true SU549266A1 (en) | 1977-03-05 |
Family
ID=20630320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU2167847A SU549266A1 (en) | 1975-08-21 | 1975-08-21 | A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU549266A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0794268A1 (en) * | 1996-03-06 | 1997-09-10 | Vacuumschmelze GmbH | Process for improving corrosion protection of aluminium coated surfaces |
-
1975
- 1975-08-21 SU SU2167847A patent/SU549266A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0794268A1 (en) * | 1996-03-06 | 1997-09-10 | Vacuumschmelze GmbH | Process for improving corrosion protection of aluminium coated surfaces |
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