CN109545491A - A kind of Nd-Fe-B permanent magnet material and preparation method thereof - Google Patents
A kind of Nd-Fe-B permanent magnet material and preparation method thereof Download PDFInfo
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- CN109545491A CN109545491A CN201910088539.XA CN201910088539A CN109545491A CN 109545491 A CN109545491 A CN 109545491A CN 201910088539 A CN201910088539 A CN 201910088539A CN 109545491 A CN109545491 A CN 109545491A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
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Abstract
The invention discloses a kind of preparation methods of Nd-Fe-B permanent magnet material, comprising: provides main-phase alloy magnetic powder and AlCoFeB alloy magnetic powder, main-phase alloy magnetic powder group becomes (Nd, Pr)xFe(100‑x‑y‑z)ByMz, 29wt%≤x≤33wt%, 0.85wt%≤y≤0.98wt%, 0 < z≤4wt%, M include any one in Co, Al, Cu, Zr and Ga or two or more combinations, and AlCoFeB alloy magnetic powder group becomes AlaCobFecB100‑a‑b‑c, 30wt%≤a≤40wt%, 42wt%≤b≤50wt%, 15wt%≤c≤20wt%；Main-phase alloy magnetic powder is uniformly mixed with AlCoFeB alloy magnetic powder, AlCoFeB alloy magnetic powder proportion >=0.1wt% and≤1.5wt%；It is post-processed later, obtains Nd-Fe-B permanent magnet material.The present invention can effectively promote the coercivity of Nd-Fe-B permanent magnet material.
Description
Technical field
The present invention relates to rare earth permanent magnet technical field more particularly to a kind of Nd-Fe-B permanent magnet materials with excellent magnetic energy
And preparation method thereof.
Background technique
Rare-earth permanent magnet be using thulium and magnesium-yttrium-transition metal be formed by intermetallic compound as matrix forever
Magnetic material, Nd-Fe-B permanent magnet (also referred to as NdFeB permanent magnet) are the highest permanent-magnet materials of current magnetic property.Sintered ndfeb permanent magnet
Material has received mondial extensive attention, has been mainly used in aerospace, computer, stone since nineteen eighty-three invention
The high-tech areas such as oily exploitation, traffic, machinery, new energy, communication, national defence.But produce the rare earth former material of Nd-Fe-B permanent magnet
Material, in particular for improving the rare earth of intrinsic coercivity index, price is high, and very big ratio is occupied in magnet generation cost
Example.Therefore, the problem of how promoting rare earth utilization rate, while the performance of magnet being made also to increase always neodymium iron boron magnetic body is raw
Produce the focus of manufacturer.
Summary of the invention
The main purpose of the present invention is to provide a kind of Nd-Fe-B permanent magnet materials and preparation method thereof, to overcome the prior art
In deficiency.
For realization aforementioned invention purpose, the technical solution adopted by the present invention includes:
The embodiment of the invention provides a kind of preparation methods of Nd-Fe-B permanent magnet material, comprising:
(1) providing main-phase alloy magnetic powder and AlCoFeB alloy magnetic powder, the group of the main-phase alloy magnetic powder respectively becomes
(Nd, Pr)xFe(100-x-y-z)ByMz, the wherein < z≤4wt% of 29wt%≤x≤33wt%, 0.85wt%≤y≤0.98wt%, 0,
M includes any one or two or more combinations in Co, Al, Cu, Zr and Ga, and the group of the AlCoFeB alloy magnetic powder becomes
AlaCobFecB100-a-b-c, wherein 30wt%≤a≤40wt%, 42wt%≤b≤50wt%, 15wt%≤c≤20wt%；
(2) the main-phase alloy magnetic powder is uniformly mixed to obtain mixing magnetic powder, the mixing magnetic with AlCoFeB alloy magnetic powder
Ratio >=0.1wt% and≤1.5wt% shared by AlCoFeB alloy magnetic powder in powder；
(3) the mixing magnetic powder is post-processed, obtains Nd-Fe-B permanent magnet material.
The embodiment of the invention also provides the Nd-Fe-B permanent magnet materials obtained by aforementioned preparation process.
Compared with prior art, advantages of the present invention at least that:
1) preparation method of Nd-Fe-B permanent magnet material provided by the invention can be in the case where remanent magnetism hardly reduces
The coercivity of Nd-Fe-B permanent magnet material is effectively promoted, and does not influence the performance of Nd-Fe-B permanent magnet material.
2) it by the way that heat pressing process is added in last handling process, so that the magnetic property of Nd-Fe-B permanent magnet material is promoted, is promoted
The effective rate of utilization of rare earth, the magnetic property of Nd-Fe-B permanent magnet material are excellent.
3) preparation method of Nd-Fe-B permanent magnet material provided by the invention has cleanliness without any pollution, production cost low, simple
The advantages that easy, easily operated and industrialization.
Specific embodiment
For many defects of the prior art, inventor is studied for a long period of time and is largely practiced, and proposes skill of the invention
Art scheme as follows will be further explained the technical solution, its implementation process and principle etc..It is understood, however, that
Within the scope of the present invention, above-mentioned each technical characteristic of the invention and each technical characteristic specifically described in (embodiment) below it
Between can be combined with each other, to constitute new or preferred technical side's scheme.Due to space limitations, I will not repeat them here.
A kind of preparation method for Nd-Fe-B permanent magnet material that the one aspect of the embodiment of the present invention provides, comprising:
(1) providing main-phase alloy magnetic powder and AlCoFeB alloy magnetic powder, the group of the main-phase alloy magnetic powder respectively becomes
(Nd, Pr)xFe(100-x-y-z)ByMz, the wherein < z≤4wt% of 29wt%≤x≤33wt%, 0.85wt%≤y≤0.98wt%, 0,
M includes any one or two or more combinations in Co, Al, Cu, Zr and Ga, and the group of the AlCoFeB alloy magnetic powder becomes
AlaCobFecB100-a-b-c, wherein 30wt%≤a≤40wt%, 42wt%≤b≤50wt%, 15wt%≤c≤20wt%；
(2) the main-phase alloy magnetic powder is uniformly mixed to obtain mixing magnetic powder, the mixing magnetic with AlCoFeB alloy magnetic powder
Ratio >=0.1wt% and≤1.5wt% shared by AlCoFeB alloy magnetic powder in powder；
(3) the mixing magnetic powder is post-processed, obtains Nd-Fe-B permanent magnet material.
In some embodiments, it is described post-processing include the mixing magnetic powder is successively carried out orientation die mould, pre-sintering,
Hot pressing and tempering.
In some embodiments, step (1) specifically includes:
According to the ratio ingredient of each element in main-phase alloy magnetic powder；
The raw material prepared is mixed and carries out melting under an inert atmosphere, obtains master alloy；
Alloy sheet is made in master alloy rapid hardening；And
The alloy sheet is broken by hydrogen and airflow milling smashes, obtains main-phase alloy magnetic powder.
In some embodiments, the partial size of the main-phase alloy magnetic powder is 1.0 μm~4.0 μm.
In some embodiments, 32%≤a≤38%, 42.5%≤b≤49%, 16.5%≤c≤18.5%.
In some embodiments, step (2) specifically includes: by the main-phase alloy magnetic powder and AlCoFeB alloy magnetic powder
In mass ratio 99.9: 0.1~98.5: 1.5 ratio mixes 0.5~5h in batch mixer, obtains mixing magnetic powder.
In some more preferred embodiments, the orientation die mould is specifically included: by the mixing magnetic powder in 1.5T
Compression moulding under the magnetic field of~2.5T is suppressed under the equal static pressure of 100MPa~300MPa, obtains blank magnet.
In some more preferred embodiments, the pre-sintering is specifically included: in mixing magnetic powder by orientation die mould
Afterwards, it is placed in vacuum environment, in 700 DEG C~950 DEG C sintering 0.5h~6h, obtains being pre-sintered magnet.
Wherein, pre-sintering specifically includes, and mixing magnetic powder obtains blank magnet, blank magnet is put by orientation die mould
In 700 DEG C~950 DEG C sintering 0.5h~6h in vacuum sintering furnace, obtain being pre-sintered magnet.
In some more preferred embodiments, the hot pressing is specifically included: in mixing magnetic powder after being pre-sintered, being protected
Temperature and the 1~15min that pressurizes, obtain precast body.
Further, the temperature of the heat preservation is 700 DEG C~900 DEG C, and the pressure of pressurization is 1Mpa~5Mpa.
Further, the temperature of the heat preservation is 790 DEG C~820 DEG C, and the pressure of pressurization is 2.5MPa~3.5Mpa.
Wherein, hot pressing specifically includes, and in mixing magnetic powder after being pre-sintered, will be pre-sintered magnet and is put into vacuum hotpressing machine
It keeps the temperature and pressurizes, the temperature of heat preservation is 790 DEG C~820 DEG C, and the pressure of pressurization is 2.5MPa~3.5Mpa.
In some more preferred embodiments, the tempering is included in vacuum environment or protective atmosphere successively
Level-one tempering and second annealing are carried out, wherein the temperature of level-one tempering is 800 DEG C~950 DEG C, and the time of level-one tempering is 0.5h
~6h, the temperature of second annealing are 450 DEG C~650 DEG C, and the time of second annealing is 0.5h~6h.
In some specific embodiments, the preparation method of Nd-Fe-B permanent magnet material, including
(1) it provides main-phase alloy magnetic powder respectively and AlCoFeB alloy magnetic powder, the chemical formula of the main-phase alloy magnetic powder is pressed
Mass percent is (Nd, Pr)xFe(100-x-y-z)ByMz, wherein 29%≤x≤33%, 0.85%≤y≤0.95%, 0 < z≤
4%, M include any one or two or more combinations in Co, Al, Cu, Zr and Ga, the change of the AlCoFeB alloy magnetic powder
Formula is Al by mass percentageaCobFecB100-a-b-c；
(2) the main-phase alloy magnetic powder is uniformly mixed to obtain mixing magnetic powder, the mixing magnetic with AlCoFeB alloy magnetic powder
Mass ratio shared by AlCoFeB alloy magnetic powder is greater than or equal to 0.1% in powder, and is less than or equal to 1.5%；
(3) resulting mixing magnetic powder is subjected to orientation die mould and pre-sintering:
Magnetic powder will be mixed in 1.5T~2.5T compression moulding, then at 100MPa~300MPa static pressure, obtain blank magnet, it
The blank magnet is put into vacuum sintering furnace in 700 DEG C~950 DEG C sintering 0.5h~6h afterwards, obtains being pre-sintered magnet；
(4) gained is pre-sintered magnet and carries out hot-pressing processing:
By be pre-sintered magnet be put into vacuum hotpressing machine the 1~15min that keeps the temperature and pressurize, wherein holding temperature be 700 DEG C~
900 DEG C, pressing force is 1~5Mpa, obtains precast body；
(5) Nd-Fe-B permanent magnet material is obtained by tempering:
Gained precast body is successively subjected to level-one tempering and second annealing in vacuum environment or protective atmosphere, wherein level-one
The temperature of tempering is 800 DEG C~950 DEG C, and the time of level-one tempering is 0.5h~6h, and the temperature of second annealing is 450 DEG C~650
DEG C, the time of second annealing is 0.5h~6h.
The other side of the embodiment of the present invention additionally provides the Nd-Fe-B permanent magnet material as made from aforementioned preparation process.
In some embodiments, the ingredient of the Nd-Fe-B permanent magnet material includes that main-phase alloy magnetic powder and AlCoFeB are closed
Golden magnetic powder.
Below by way of several embodiments technical solution that present invention be described in more detail.However, selected embodiment is only
For illustrating the present invention, and do not limit the scope of the invention.
Embodiment 1
The chemical formula of main-phase alloy magnetic powder is (NdPr)29Cu0.15Al0.05Zr0.3Co0.5Febal.B0.98, AlCoFeB alloy magnetic
Powder chemical formula is Al35Co46.3Fe17.72B0.98.AlCoFeB alloy magnetic powder doping is mix magnetic powder 1%.
Preparation: it is (NdPr) that the raw material by purity greater than 99%, which presses nominal composition,29Cu0.15Al0.05Zr0.3Co0.5Febal .B0.98It is matched, using the alloy sheet of the industrially prepared 0.3 millimeter of left and right thickness out of rapid hardening, alloy sheet is broken by hydrogen, air-flow
Grinding process prepares the powder that average grain diameter is 1 μm~4 μm.AlCoFeB alloy is put down by melting, after hydrogen is broken and ball milling
The powder that equal partial size is 1 μm~15 μm.AlCoFeB alloy powder and main-phase alloy magnetic powder are being mixed as after the proportions of 1:99
Mixing 0.5 hour~5 hours in material machine.By powder after evenly mixing 1.5T~2.5T orientation compression moulding off field, after
Isostatic cool pressing is carried out under 100~300MPa pressure again, obtains blank magnet；Blank magnet is put into vacuum sintering furnace
700 DEG C~950 DEG C sintering 0.5h~6h keep the temperature 1 under 700 DEG C~900 DEG C and 1~5MPa pressure in vacuum hotpressing machine later
~15min is then tempered 0.5h~6h in 800 DEG C~950 DEG C progress level-ones, complete in 450 DEG C~650 DEG C tempering 0.5h~6h
Finish is added air-cooled by air quenching, is come out of the stove after being cooled to room temperature, be can be obtained Nd-Fe-B permanent magnet material.
Nd-Fe-B permanent magnet material obtained is tested, the coercivity H of gained Nd-Fe-B permanent magnet material is not relative to mixing
The permanent-magnet material of miscellaneous AlCoFeB alloy magnetic powder is higher by nearly 1.5kOe, and the results are shown in Table 1.
Table 1.
| Br(kGs) | H(kOe) | (BH)m(MGOe) | |
| It is undoped | 14.39 | 15.01 | 50.59 |
| Doping 1% | 14.15 | 16.48 | 51.41 |
Embodiment 2
The preparation method of this preparation method and embodiment 1 is essentially identical, and difference is, the chemical formula of main-phase alloy magnetic powder is
(NdPr)29Cu0.15Al0.05Zr0.3Co0.5Febal.B0.94。
Nd-Fe-B permanent magnet material obtained is tested, the coercivity H of gained Nd-Fe-B permanent magnet material is not relative to mixing
The permanent-magnet material of miscellaneous AlCoFeB alloy magnetic powder is higher by 1.2kOe, and the results are shown in Table 2.
Table 2.
| Br(kGs) | H(kOe) | (BH)m(MGOe) | |
| It is undoped | 14.34 | 14.98 | 50.42 |
| Doping 1% | 14.11 | 16.19 | 51.13 |
Embodiment 3
The preparation method of this preparation method and embodiment 1 is essentially identical, and difference is, AlCoFeB alloy magnetic powder doping
It is the 0.5% of mixing magnetic powder.
Nd-Fe-B permanent magnet material obtained is tested, the coercivity H of gained Nd-Fe-B permanent magnet material is not relative to mixing
The permanent-magnet material of miscellaneous AlCoFeB alloy magnetic powder is higher by 0.6kOe, and the results are shown in Table 3.
Table 3.
| Br(kGs) | H(kOe) | (BH)m(MGOe) | |
| It is undoped | 14.39 | 15.01 | 50.59 |
| Doping 0.5% | 14.23 | 15.62 | 50.73 |
Embodiment 4
The preparation method of this preparation method and embodiment 1 is essentially identical, and difference is, AlCoFeB alloy magnetic powder doping
It is the 1.5% of mixing magnetic powder.
Nd-Fe-B permanent magnet material obtained is tested, the coercivity H of gained Nd-Fe-B permanent magnet material is not relative to mixing
The permanent-magnet material of miscellaneous AlCoFeB alloy magnetic powder is higher by nearly 1.6kOe, and the results are shown in Table 4.
Table 4.
| Br(kGs) | H(kOe) | (BH)m(MGOe) | |
| It is undoped | 14.39 | 15.01 | 50.59 |
| Doping 1.5% | 14.12 | 16.59 | 51.33 |
Embodiment 5
The preparation method of this preparation method and embodiment 1 is essentially identical, and difference is, AlCoFeB alloy magnetic powder doping
It is the 0.1% of mixing magnetic powder.
Nd-Fe-B permanent magnet material obtained is tested, the coercivity H of gained Nd-Fe-B permanent magnet material is not relative to mixing
The permanent-magnet material of miscellaneous AlCoFeB alloy magnetic powder is higher by 0.1kOe, and the results are shown in Table 5.
Table 5.
| Br(kGs) | H(kOe) | (BH)m(MGOe) | |
| It is undoped | 14.39 | 15.01 | 50.59 |
| Doping 0.1% | 14.37 | 15.12 | 50.62 |
Embodiment 6
The preparation method of this preparation method and embodiment 1 is essentially identical, and difference is, the chemistry of AlCoFeB alloy magnetic powder
Formula is Al34Co47.5Fe17.56B0.94。
Nd-Fe-B permanent magnet material obtained is tested, the coercivity H of gained Nd-Fe-B permanent magnet material is not relative to mixing
The permanent-magnet material of miscellaneous AlCoFeB alloy magnetic powder is higher by 1.1kOe, and the results are shown in Table 6.
Table 6.
| Br(kGs) | H(kOe) | (BH)m(MGOe) | |
| It is undoped | 14.39 | 15.01 | 50.59 |
| Doping 1% | 14.04 | 16.13 | 50.96 |
In addition, inventor also utilizes the alternate embodiments such as listed other raw materials and other process conditions above
Various raw materials and corresponding process conditions in 1~6 have carried out corresponding test, the content of required verifying and produce with Examples 1 to 6
Product are close.So do not explained one by one to the verifying content of each embodiment, only using Examples 1 to 6 as representative herein
Illustrate the excellent place of the present patent application.
It should be understood that the technical concepts and features of above-described embodiment only to illustrate the invention, ripe its object is to allow
The personage for knowing technique cans understand the content of the present invention and implement it accordingly, and protection model of the invention can not be limited with this
It encloses.Any equivalent change or modification in accordance with the spirit of the invention should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of Nd-Fe-B permanent magnet material, characterized by comprising:
(1) main-phase alloy magnetic powder and AlCoFeB alloy magnetic powder be provided respectively, the group of the main-phase alloy magnetic powder become (Nd,
Pr)xFe(100-x-y-z)ByMz, the wherein < of 29wt%≤x≤33wt%, 0.85wt%≤y≤0.98wt%, 0 z≤4wt%, M packet
Any one in Co, Al, Cu, Zr and Ga or two or more combinations are included, the group of the AlCoFeB alloy magnetic powder becomes
AlaCobFecB100-a-b-c, wherein 30wt%≤a≤40wt%, 42wt%≤b≤50wt%, 15wt%≤c≤20wt%；
(2) the main-phase alloy magnetic powder is uniformly mixed to obtain with AlCoFeB alloy magnetic powder mixing magnetic powder, in the mixing magnetic powder
Ratio >=0.1wt% and≤1.5wt% shared by AlCoFeB alloy magnetic powder；
(3) the mixing magnetic powder is post-processed, obtains Nd-Fe-B permanent magnet material.
2. preparation method according to claim 1, which is characterized in that it is described post-processing include to the mixing magnetic powder successively
Carry out orientation die mould, pre-sintering, hot pressing and tempering.
3. preparation method according to claim 1, which is characterized in that step (1) specifically includes:
According to the ratio ingredient of each element in main-phase alloy magnetic powder；
The raw material prepared is mixed and carries out melting under an inert atmosphere, obtains master alloy；
Alloy sheet is made in master alloy rapid hardening；And
The alloy sheet is broken by hydrogen and airflow milling crushes, obtains main-phase alloy magnetic powder.
4. preparation method according to claim 1, it is characterised in that: the partial size of the main-phase alloy magnetic powder be 1.0 μm~
4.0μm。
5. preparation method according to claim 1, it is characterised in that: 32%≤a≤38%, 42.5%≤b≤49%,
16.5%≤c≤18.5%.
6. preparation method according to claim 1, which is characterized in that step (2) specifically includes: by the main-phase alloy magnetic
The ratio of powder and AlCoFeB alloy magnetic powder in mass ratio 99.9: 0.1~98.5: 1.5 mixes 0.5~5h in batch mixer, obtains
Mix magnetic powder.
7. preparation method according to claim 2, which is characterized in that the orientation die mould specifically includes: by the mixing
Magnetic powder compression moulding under the magnetic field of 1.5T~2.5T is suppressed under the equal static pressure of 100MPa~300MPa, obtains blank magnetic
Body；And/or it is described pre-sintering specifically include: mixing magnetic powder after being orientated die mould, be placed in vacuum environment, in 700 DEG C~
950 DEG C of sintering 0.5h~6h obtain being pre-sintered magnet.
8. preparation method according to claim 2, which is characterized in that the hot pressing specifically includes: passing through in mixing magnetic powder
It after pre-sintering, keeps the temperature and the 1~15min that pressurizes, obtains precast body；Preferably, holding temperature is 700 DEG C~900 DEG C, moulding pressure
For 1Mpa~5Mpa；It is further preferred that the temperature of the heat preservation be 790 DEG C~820 DEG C, moulding pressure be 2.5MPa~
3.5Mpa。
9. preparation method according to claim 2, which is characterized in that the tempering is included in vacuum environment or protection
Level-one tempering and second annealing are successively carried out in atmosphere, wherein the temperature of level-one tempering is 800 DEG C~950 DEG C, level-one tempering
Time is 0.5h~6h, and the temperature of second annealing is 450 DEG C~650 DEG C, and the time of second annealing is 0.5h~6h.
10. Nd-Fe-B permanent magnet material made from the preparation method as described in any one of claim 1~9；Preferably, the neodymium iron
The ingredient of B permanent magnetic material includes main-phase alloy magnetic powder and AlCoFeB alloy magnetic powder.
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| WO2021258280A1 (en) * | 2020-06-23 | 2021-12-30 | 中国科学院宁波材料技术与工程研究所 | Heavy rare earth-free high-performance neodymium-iron-boron permanent magnet material and preparation method therefor |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345108A (en) * | 2008-05-21 | 2009-01-14 | 四川大学 | Preparation method of full-compact nanometer compound rare earth permanent magnetic material |
| CN101471165A (en) * | 2007-12-26 | 2009-07-01 | 北京中科三环高技术股份有限公司 | NbFeB sintered rare earth permanent magnet alloy and method for producing the same |
| JP2010062484A (en) * | 2008-09-08 | 2010-03-18 | Toshiba Corp | Core shell type magnetic material, device apparatus, and antenna assembly |
| CN103123843A (en) * | 2011-11-21 | 2013-05-29 | 中国科学院宁波材料技术与工程研究所 | Preparation method for fine grain anisotropy densified neodymium iron boron permanent magnet |
| CN104051102A (en) * | 2013-03-12 | 2014-09-17 | 北京中科三环高技术股份有限公司 | Rare-earth permanent magnet and preparation method thereof |
| CN104821218A (en) * | 2015-05-07 | 2015-08-05 | 安徽万磁电子有限公司 | Sintered Nd-Fe-B magnet with zinc-aluminum-titanium-cobalt composite additive and preparation method thereof |
| CN106920612A (en) * | 2015-12-28 | 2017-07-04 | 中国科学院宁波材料技术与工程研究所 | A kind of preparation method of Nd-Fe-B permanent magnet material |
| WO2017132075A1 (en) * | 2016-01-28 | 2017-08-03 | Urban Mining Company | Grain boundary engineering of sintered magnetic alloys and the compositions derived therefrom |
| CN107742564A (en) * | 2017-10-31 | 2018-02-27 | 中钢集团安徽天源科技股份有限公司 | A kind of method that auxiliary alloy addition of high dysprosium prepares low-cost neodymium iron boron magnet |
| CN108133799A (en) * | 2017-12-20 | 2018-06-08 | 江西理工大学 | A kind of high performance nano-crystal thermal deformation Nd-Fe-B permanent magnet and preparation method thereof |
| JP2018174311A (en) * | 2017-03-30 | 2018-11-08 | 日立金属株式会社 | Method for manufacturing r-t-b based sintered magnet |
-
2019
- 2019-01-29 CN CN201910088539.XA patent/CN109545491B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471165A (en) * | 2007-12-26 | 2009-07-01 | 北京中科三环高技术股份有限公司 | NbFeB sintered rare earth permanent magnet alloy and method for producing the same |
| CN101345108A (en) * | 2008-05-21 | 2009-01-14 | 四川大学 | Preparation method of full-compact nanometer compound rare earth permanent magnetic material |
| JP2010062484A (en) * | 2008-09-08 | 2010-03-18 | Toshiba Corp | Core shell type magnetic material, device apparatus, and antenna assembly |
| CN103123843A (en) * | 2011-11-21 | 2013-05-29 | 中国科学院宁波材料技术与工程研究所 | Preparation method for fine grain anisotropy densified neodymium iron boron permanent magnet |
| CN104051102A (en) * | 2013-03-12 | 2014-09-17 | 北京中科三环高技术股份有限公司 | Rare-earth permanent magnet and preparation method thereof |
| CN104821218A (en) * | 2015-05-07 | 2015-08-05 | 安徽万磁电子有限公司 | Sintered Nd-Fe-B magnet with zinc-aluminum-titanium-cobalt composite additive and preparation method thereof |
| CN106920612A (en) * | 2015-12-28 | 2017-07-04 | 中国科学院宁波材料技术与工程研究所 | A kind of preparation method of Nd-Fe-B permanent magnet material |
| WO2017132075A1 (en) * | 2016-01-28 | 2017-08-03 | Urban Mining Company | Grain boundary engineering of sintered magnetic alloys and the compositions derived therefrom |
| JP2018174311A (en) * | 2017-03-30 | 2018-11-08 | 日立金属株式会社 | Method for manufacturing r-t-b based sintered magnet |
| CN107742564A (en) * | 2017-10-31 | 2018-02-27 | 中钢集团安徽天源科技股份有限公司 | A kind of method that auxiliary alloy addition of high dysprosium prepares low-cost neodymium iron boron magnet |
| CN108133799A (en) * | 2017-12-20 | 2018-06-08 | 江西理工大学 | A kind of high performance nano-crystal thermal deformation Nd-Fe-B permanent magnet and preparation method thereof |
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| WO2021258280A1 (en) * | 2020-06-23 | 2021-12-30 | 中国科学院宁波材料技术与工程研究所 | Heavy rare earth-free high-performance neodymium-iron-boron permanent magnet material and preparation method therefor |
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