CN104821694A - Process of preparing rare earth permanent magnet for motor - Google Patents
Process of preparing rare earth permanent magnet for motor Download PDFInfo
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- CN104821694A CN104821694A CN201510194793.XA CN201510194793A CN104821694A CN 104821694 A CN104821694 A CN 104821694A CN 201510194793 A CN201510194793 A CN 201510194793A CN 104821694 A CN104821694 A CN 104821694A
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Abstract
The invention discloses a process of preparing a rare earth permanent magnet for a motor. The process comprises the steps of (1) preparing a rare earth permanent magnetic ingot, (2) crushing and milling, (3) performing, and (4) sintering. A rare earth magnet adopts magnetic materials of the following atomic formula: (Pr1-x-yGdxCey)a(Co1-zZrz)100-a-b-cCbSic, where x=0.26-0.29, y=0.16-0.17, z=0.1-0.12, a=27-29, b=4.6 and c =2-2.5. According to the invention, the permanent magnet is high in magnetic property and reliability, can be used on a motor device for extending the service life of the motor, is easy to use, and has a silencing effect to some extent.
Description
Technical field
The present invention relates to motor device field, be specifically related to a kind of preparation method of motor rare-earth permanent magnet.
Background technology
Permanent magnet is widely used in the drive motors etc. of the hardware driving equipment of computer, various household electrical appliance, electroacoustic equipment, multimedia equipment, electronic instrument and meter, Medical Devices, industrial motor, wind-driven generator and automobile sensor, electric automobile and hybrid vehicle, has become modern industry and the indispensable critical function material of socio-economic development.
In order to better be applied in various industrial scale, this also proposes more and more higher requirement to the making of magnetite thereupon, permanent magnet in the market of a great variety, and this also requires higher to the manufacture method being directed to permanent magnet.
In view of this, be necessary to provide that a kind of magnetic is high, the preparation method of the motor rare-earth permanent magnet of good muffling effect.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of magnetic is high, the preparation method of the motor rare-earth permanent magnet of good muffling effect.
The present invention is achieved through the following technical solutions: the preparation method of a kind of motor rare-earth permanent magnet of the present invention, comprises the steps: that this rare earth magnetite adopts the permanent magnetic material of following atom and molecule formula: (Pr
1-x-ygd
xce
y)
a(Co
1-zzr
z)
100-a-b-cc
bsi
c, wherein x=0.26-0.29, y=0.16-0.17, z=0.1-0.12, a=27-29, b=4.6, c=2-2.5;
(1) prepare rare earth permanent magnet ingot: Pr, Gd, Ce, Co, Zr, C, Si are mixed according to the proportioning of chemical formula, by under argon gas atmosphere after the raw material mixing after taking in melting, refining, cooling, cast, obtains rare earth permanent magnet ingot;
(2) broken powder process: by above-mentioned alloy cast ingot, the alloy powder of 6-8mm size is first broken for by the hydrogen method of breaking, then be positioned in reaction vessel and vacuumize, then helium is passed into, maintenance helium pressure is 2-4MPa, utilizes airflow milling by alloy pulverization for average grain diameter is the rare-earth magnetic of 12-15 μm;
(3) base: under argon shield, after the set of molds insert above-mentioned rare-earth magnetic, the magnetic in column die cavity space axially magnetic integrated punching is shaped to column idiosome, and while punching press, is carried out orientation by set of molds;
Described orientation bestows axial current on the mould bar of column die cavity space center position, make mould bar produces and magnetite number of poles equal number vertical magnetic field, when applying magnetic field, magnetic field size is adjusted by regulating electric charge voltage range and charging current scope, described charge voltage range is 1-3V, and charging current scope is 0.7C-0.9C;
And adjacent the two poles of the earth form a magnetic loop, this multipole magnetic field can form anisotropy alignment effect to the magnetic forming column idiosome, and then make the orientation formation of magnetic and the pressing direction of set of molds be the radial direction of vertical direction, make column idiosome in the process that integrated punching is shaping, the radial orientation of anisotropy that its magnetic has multipole carries out orientation simultaneously under magnetic field, and obtained density is 3.2-3.9g/cm
3molded blank;
(4) sinter: molded blank is transferred to sintering furnace by conveyer under nitrogen protection and sinters, close separation valve door, first be warming up to 900-1100 DEG C with 15-20 DEG C/min, temperature retention time is 4-6h, is then warming up to 1100 DEG C of sintering 2-2.8h with 10-20 DEG C/min;
Carry out four sections subsequently at the uniform velocity to lower the temperature: first temperature-fall period, cooling rate is 8-9 DEG C/min, the temper 1-1.9h when being cooled to 870-890 DEG C; At second temperature-fall period, cooling rate remains on 5-7 DEG C/min, temper 5-6h when being cooled to 700-710 DEG C; At the 3rd temperature-fall period, cooling rate remains on 2-3 DEG C/min, temper 2-3h when being cooled to 400-600 DEG C; At the 4th temperature-fall period, adopt wind cooling temperature lowering to room temperature, leave standstill, obtain product.
Further, in step (3), during described applying magnetic field, described charge voltage range is 2V, and charging current scope is 0.8C.
Further, in step (3), described mould is provided with columnar through holes, the port diameter of described mould is greater than through-hole diameter, described mould is provided with horn opening, and the inclined plane of the horn opening of described mould and the angle of horizontal plane are 70-80 °.
Motor rare-earth permanent magnet prepared by method of the present invention.
Beneficial effect: the magnetic of permanent magnet of the present invention is high, reliability strong, is used in the useful life that motor device can extend motor, easy to use, has certain erasure effect.
Embodiment
Further specific descriptions will be done by specific embodiment to the present invention below, but can not be interpreted as it is limiting the scope of the present invention.
Embodiment 1
The preparation method of a kind of motor rare-earth permanent magnet of the present invention, comprises the steps: that this rare earth magnetite adopts the permanent magnetic material of following atom and molecule formula: (Pr
1-x-ygd
xce
y)
a(Co
1-zzr
z)
100-a-b-cc
bsi
c, wherein x=0.26-0.29, y=0.16-0.17, z=0.1-0.12, a=27-29, b=4.6, c=2;
(1) prepare rare earth permanent magnet ingot: Pr, Gd, Ce, Co, Zr, C, Si are mixed according to the proportioning of chemical formula, by under argon gas atmosphere after the raw material mixing after taking in melting, refining, cooling, cast, obtains rare earth permanent magnet ingot;
(2) broken powder process: by above-mentioned alloy cast ingot, first be broken for the alloy powder of 6mm size by the hydrogen method of breaking, be then positioned in reaction vessel and vacuumize, then pass into helium, maintenance helium pressure is 2MPa, utilizes airflow milling by alloy pulverization for average grain diameter is the rare-earth magnetic of 12 μm;
(3) base: under argon shield, after the set of molds insert above-mentioned rare-earth magnetic, the magnetic in column die cavity space axially magnetic integrated punching is shaped to column idiosome, and while punching press, is carried out orientation by set of molds;
Described orientation bestows axial current on the mould bar of column die cavity space center position, make mould bar produces and magnetite number of poles equal number vertical magnetic field, when applying magnetic field, magnetic field size is adjusted by regulating electric charge voltage range and charging current scope, described charge voltage range is 1V, and charging current scope is 0.7C;
And adjacent the two poles of the earth form a magnetic loop, this multipole magnetic field can form anisotropy alignment effect to the magnetic forming column idiosome,
And then make the orientation formation of magnetic and the pressing direction of set of molds be the radial direction of vertical direction, make column idiosome in the process that integrated punching is shaping, the radial orientation of anisotropy that its magnetic has multipole carries out orientation simultaneously under magnetic field, and obtained density is 3.2-3.9g/cm
3molded blank; Described mould is provided with columnar through holes, and the port diameter of described mould is greater than through-hole diameter, and described mould is provided with horn opening, and the inclined plane of the horn opening of described mould and the angle of horizontal plane are 70-80 °.
(4) sinter: molded blank is transferred to sintering furnace by conveyer under nitrogen protection and sinters, close separation valve door, be first warming up to 900 DEG C with 15 DEG C/min, temperature retention time is 4h, is then warming up to 1100 DEG C of sintering 2h with 10 DEG C/min;
Carry out four sections subsequently at the uniform velocity to lower the temperature: first temperature-fall period, cooling rate is 8 DEG C/min, the temper 1h when being cooled to 870 DEG C; At second temperature-fall period, cooling rate remains on 5 DEG C/min, temper 5h when being cooled to 700 DEG C; At the 3rd temperature-fall period, cooling rate remains on 2 DEG C/min, temper 2h when being cooled to 400 DEG C; At the 4th temperature-fall period, adopt wind cooling temperature lowering to room temperature, leave standstill, obtain product.
Motor rare-earth permanent magnet prepared by method of the present invention.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1: the preparation method of a kind of motor rare-earth permanent magnet of the present invention, comprises the steps: that this rare earth magnetite adopts the permanent magnetic material of following atom and molecule formula: (Pr
1-x-ygd
xce
y)
a(Co
1-zzr
z)
100-a-b-cc
bsi
c, wherein x=0.28, y=0.165, z=0.15, a=28, b=4.6, c=2.3;
In step (2), broken powder process: by above-mentioned alloy cast ingot, the alloy powder of 7mm size is first broken for by the hydrogen method of breaking, then be positioned in reaction vessel and vacuumize, then helium is passed into, maintenance helium pressure is 3MPa, utilizes airflow milling by alloy pulverization for average grain diameter is the rare-earth magnetic of 13 μm;
In step (3), described orientation bestows axial current on the mould bar of column die cavity space center position, make mould bar produces and magnetite number of poles equal number vertical magnetic field, when applying magnetic field, magnetic field size is adjusted by regulating electric charge voltage range and charging current scope, described charge voltage range is 2V, and charging current scope is 0.8C; And then make the orientation formation of magnetic and the pressing direction of set of molds be the radial direction of vertical direction, make column idiosome in the process that integrated punching is shaping, the radial orientation of anisotropy that its magnetic has multipole carries out orientation simultaneously under magnetic field, and obtained density is 3.6g/cm
3molded blank; Described mould is provided with columnar through holes, and the port diameter of described mould is greater than through-hole diameter, and described mould is provided with horn opening, and the inclined plane of the horn opening of described mould and the angle of horizontal plane are 75 °.
In step (4), molded blank is transferred to sintering furnace by conveyer under nitrogen protection sinter, closes separation valve door, be first warming up to 1000 DEG C with 18 DEG C/min, temperature retention time is 5h, is then warming up to 1100 DEG C of sintering 2.6h with 18 DEG C/min;
Carry out four sections subsequently at the uniform velocity to lower the temperature: first temperature-fall period, cooling rate is 8.6 DEG C/min, the temper 1.5h when being cooled to 880 DEG C; At second temperature-fall period, cooling rate remains on 6 DEG C/min, temper 5.6h when being cooled to 705 DEG C; At the 3rd temperature-fall period, cooling rate remains on 2.5 DEG C/min, temper 2.5h when being cooled to 500 DEG C; At the 4th temperature-fall period, adopt wind cooling temperature lowering to room temperature, leave standstill, obtain product.
Embodiment 3
Embodiment 3 is with the difference of embodiment 1: the preparation method of a kind of motor rare-earth permanent magnet of the present invention, comprises the steps: that this rare earth magnetite adopts the permanent magnetic material of following atom and molecule formula: (Pr
1-x-ygd
xce
y)
a(Co
1-zzr
z)
100-a-b-cc
bsi
c, wherein x=0.29, y=0.17, z=0.12, a=29, b=4.6, c=2.5;
In step (2), broken powder process: by above-mentioned alloy cast ingot, the alloy powder of 8mm size is first broken for by the hydrogen method of breaking, then be positioned in reaction vessel and vacuumize, then helium is passed into, maintenance helium pressure is 4MPa, utilizes airflow milling by alloy pulverization for average grain diameter is the rare-earth magnetic of 12-15 μm;
(3) base: under argon shield, after the set of molds insert above-mentioned rare-earth magnetic, the magnetic in column die cavity space axially magnetic integrated punching is shaped to column idiosome, and while punching press, is carried out orientation by set of molds;
Described orientation bestows axial current on the mould bar of column die cavity space center position, make mould bar produces and magnetite number of poles equal number vertical magnetic field, when applying magnetic field, magnetic field size is adjusted by regulating electric charge voltage range and charging current scope, described charge voltage range is 3V, and charging current scope is 0.9C;
And adjacent the two poles of the earth form a magnetic loop, this multipole magnetic field can form anisotropy alignment effect to the magnetic forming column idiosome,
And then make the orientation formation of magnetic and the pressing direction of set of molds be the radial direction of vertical direction, make column idiosome in the process that integrated punching is shaping, the radial orientation of anisotropy that its magnetic has multipole carries out orientation simultaneously under magnetic field, and obtained density is the molded blank of 3.9g/cm3; In step (3), described mould is provided with columnar through holes, the port diameter of described mould is greater than through-hole diameter, and described mould is provided with horn opening, and the inclined plane of the horn opening of described mould and the angle of horizontal plane are 80 °.
(4) sinter: molded blank is transferred to sintering furnace by conveyer under nitrogen protection and sinters, close separation valve door, be first warming up to 1100 DEG C with 20 DEG C/min, temperature retention time is 6h, is then warming up to 1100 DEG C of sintering 2.8h with 20 DEG C/min;
Carry out four sections subsequently at the uniform velocity to lower the temperature: first temperature-fall period, cooling rate is 9 DEG C/min, the temper 1.9h when being cooled to 890 DEG C; At second temperature-fall period, cooling rate remains on 7 DEG C/min, temper 6h when being cooled to 710 DEG C; At the 3rd temperature-fall period, cooling rate remains on 3 DEG C/min, temper 3h when being cooled to 600 DEG C; At the 4th temperature-fall period, adopt wind cooling temperature lowering to room temperature, leave standstill, obtain product.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and application claims protection range is defined by appending claims, specification and equivalent thereof.
Claims (4)
1. a preparation method for motor rare-earth permanent magnet, is characterized in that comprising the steps: that this rare earth magnetite adopts the permanent magnetic material of following atom and molecule formula: (Pr
1-x-ygd
xce
y)
a(Co
1-zzr
z)
100-a-b-Cc
bsi
c, wherein x=0.26-0.29, y=0.16-0.17, z=0.1-0.12, a=27-29, b=4.6, c=2-2.5;
(1) prepare rare earth permanent magnet ingot: Pr, Gd, Ce, Co, Zr, C, Si are mixed according to the proportioning of chemical formula, by under argon gas atmosphere after the raw material mixing after taking in melting, refining, cooling, cast, obtains rare earth permanent magnet ingot;
(2) broken powder process: by above-mentioned alloy cast ingot, the alloy powder of 6-8mm size is first broken for by the hydrogen method of breaking, then be positioned in reaction vessel and vacuumize, then helium is passed into, maintenance helium pressure is 2-4MPa, utilizes airflow milling by alloy pulverization for average grain diameter is the rare-earth magnetic of 12-15 μm;
(3) base: under argon shield, after the set of molds insert above-mentioned rare-earth magnetic, the magnetic in column die cavity space axially magnetic integrated punching is shaped to column idiosome, and while punching press, is carried out orientation by set of molds;
Described orientation bestows axial current on the mould bar of column die cavity space center position, make mould bar produces and magnetite number of poles equal number vertical magnetic field, when applying magnetic field, magnetic field size is adjusted by regulating electric charge voltage range and charging current scope, described charge voltage range is 1-3V, and charging current scope is 0.7C-0.9C;
And adjacent the two poles of the earth form a magnetic loop, this multipole magnetic field can form anisotropy alignment effect to the magnetic forming column idiosome,
And then make the orientation formation of magnetic and the pressing direction of set of molds be the radial direction of vertical direction, make column idiosome in the process that integrated punching is shaping, the radial orientation of anisotropy that its magnetic has multipole carries out orientation simultaneously under magnetic field, and obtained density is 3.2-3.9g/cm
3molded blank;
(4) sinter: molded blank is transferred to sintering furnace by conveyer under nitrogen protection and sinters, close separation valve door, first be warming up to 900-1100 DEG C with 15-20 DEG C/min, temperature retention time is 4-6h, is then warming up to 1100 DEG C of sintering 2-2.8h with 10-20 DEG C/min;
Carry out four sections subsequently at the uniform velocity to lower the temperature: first temperature-fall period, cooling rate is 8-9 DEG C/min, the temper 1-1.9h when being cooled to 870-890 DEG C; At second temperature-fall period, cooling rate remains on 5-7 DEG C/min, temper 5-6h when being cooled to 700-710 DEG C; At the 3rd temperature-fall period, cooling rate remains on 2-3 DEG C/min, temper 2-3h when being cooled to 400-600 DEG C; At the 4th temperature-fall period, adopt wind cooling temperature lowering to room temperature, leave standstill, obtain product.
2. the preparation method of motor rare-earth permanent magnet according to claim 1, is characterized in that: in step (3), during described applying magnetic field, and described charge voltage range is 2V, and charging current scope is 0.8C.
3. the preparation method of motor rare-earth permanent magnet according to claim 1, it is characterized in that: in step (3), described mould is provided with columnar through holes, the port diameter of described mould is greater than through-hole diameter, described mould is provided with horn opening, and the inclined plane of the horn opening of described mould and the angle of horizontal plane are 70-80 °.
4. the motor rare-earth permanent magnet prepared of the method according to any one of claim 1-3.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100255A (en) * | 2016-06-27 | 2016-11-09 | 无锡新大力电机有限公司 | A kind of preparation method of motor rare-earth permanent magnet |
| CN111313571A (en) * | 2019-11-29 | 2020-06-19 | 南京安德海睿智能科技有限公司 | Hydrogen-resistant motor based on rare earth permanent magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101316674A (en) * | 2006-04-14 | 2008-12-03 | 信越化学工业株式会社 | Process for producing rare-earth permanent magnet material |
| CN101944430A (en) * | 2009-07-01 | 2011-01-12 | 信越化学工业株式会社 | Rare earth magnet and its preparation |
| US8378877B2 (en) * | 2007-12-28 | 2013-02-19 | Aleksandr Mettalinovich TISHIN | Porous materials embedded with nanoparticles, methods of fabrication and uses thereof |
| CN104157388A (en) * | 2014-03-15 | 2014-11-19 | 南通保来利轴承有限公司 | Manufacture method of circular ferrite ultra-anisotropic radially-oriented magnet |
-
2015
- 2015-04-17 CN CN201510194793.XA patent/CN104821694A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101316674A (en) * | 2006-04-14 | 2008-12-03 | 信越化学工业株式会社 | Process for producing rare-earth permanent magnet material |
| US8378877B2 (en) * | 2007-12-28 | 2013-02-19 | Aleksandr Mettalinovich TISHIN | Porous materials embedded with nanoparticles, methods of fabrication and uses thereof |
| CN101944430A (en) * | 2009-07-01 | 2011-01-12 | 信越化学工业株式会社 | Rare earth magnet and its preparation |
| CN104157388A (en) * | 2014-03-15 | 2014-11-19 | 南通保来利轴承有限公司 | Manufacture method of circular ferrite ultra-anisotropic radially-oriented magnet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100255A (en) * | 2016-06-27 | 2016-11-09 | 无锡新大力电机有限公司 | A kind of preparation method of motor rare-earth permanent magnet |
| CN111313571A (en) * | 2019-11-29 | 2020-06-19 | 南京安德海睿智能科技有限公司 | Hydrogen-resistant motor based on rare earth permanent magnet |
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