CN109065311A - A kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy and preparation method - Google Patents
A kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy and preparation method Download PDFInfo
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- CN109065311A CN109065311A CN201810659415.8A CN201810659415A CN109065311A CN 109065311 A CN109065311 A CN 109065311A CN 201810659415 A CN201810659415 A CN 201810659415A CN 109065311 A CN109065311 A CN 109065311A
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
Abstract
The invention discloses a kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy and preparation method, the chemical formula of alloy is (Nd0.8Ce0.2)13Fe82‑xB5Hfx.Preparation method is the following steps are included: S1, weighing Nd, Ce, Fe, B and Hf；S2, it is put into electric arc furnaces and carries out 5~6 meltings, obtain mother alloy ingot after cooling；Mother alloy ingot, is broken into the fritter of 4~6g by S3, and is fitted into quartz ampoule；In vacuum quick quenching equipment, under an argon atmosphere, heated using radio-frequency induction coil, after alloy melts completely, under argon pressure effect, master alloy is sprayed through the nozzle of quartzy bottom of the tube, it is ejected on the copper roller that revolving speed is 16~25m/s, permanent-magnet alloy can be obtained.Present invention process is simple, is free of heavy rare earth Dy or Tb, is free of strategic resource Co, can improve the utilization rate of light rare earth Ce, reduce the production cost of rare earth permanent-magnetic material, the large-scale production suitable for enterprise.
Description
Technical field
The present invention relates to technical field of magnetic materials, specifically belong to a kind of rare earth permanent-magnetic material, more particularly, to one
Kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy at being grouped as and preparation method.
Background technique
Neodymium iron boron is as third generation rare earth permanent-magnetic material, the excellent magnetism with high remanent magnetism, high-coercive force, high energy product
Can, it is widely used in electronics, wind-power electricity generation, new-energy automobile, communication, medicine, precision machinery processing and other fields.However, wind-force
Under the operating conditions such as power generation, hybrid vehicle traction engine, higher want is proposed to the coercivity of Nd-Fe-B permanent magnet
It asks.Largely studies have shown that can effectively improve the coercivity of Nd-Fe-B permanent magnet with the part Dy/Tb substitution Nd.But due to
Heavy rare earth Dy/Tb resource scarcity, and compared with Nd, it is expensive, lead to that the production cost increases, is unfavorable for scope of the enterprise metaplasia
It produces.And light rare earth elements Ce rich content, price are lower, can effectively control cost.The addition of micro element Hf, can be with
Effectively inhibit main phase Nd2Fe14B crystal grain is grown up, and crystal grain refinement is played the role of, to improve the coercivity of Nd-Fe-B permanent magnet.
Summary of the invention
Object of the present invention is to solve the above problems, a kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy and preparation method are designed.
The permanent-magnet alloy is free of heavy rare earth Dy or Tb, is free of strategic resource Co, can improve the utilization rate of light rare earth Ce, improves rare earth permanent magnet
Alloy coercivity, and the RE permanent magnetic alloy and preparation method of a kind of high-coercive force are provided for industrial production.
To achieve the goals above, the technical scheme is that
A kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy, the chemical formula of the material are (Nd0.8Ce0.2)13Fe82-xB5Hfx,
In, 0≤x≤2.
Further, the present invention provides the preparation method of above-mentioned high-coercive force neodymium ferrocerium boron permanent-magnet alloy, including it is following
Step:
S1, according to chemical molecular general formula (Nd0.8Ce0.2)13Fe82-xB5HfxWeighing prepare RE permanent magnetic alloy raw material Nd,
Ce, Fe, B and Hf；X is atomicity in formula, and the raw material is 0.8*13 with atomic percentage, the atomic percent of rare earth Nd,
The atomic percent of Rare-Earth Ce is 0.2*13, and the atomic percent of Fe is 82-x, and the atomic percent of B is the atomic percent of 5, Hf
Than for x；
S2, it raw material is put into electric arc furnaces carries out 5~6 meltings, the relatively uniform master alloy casting of ingredient is obtained after cooling
Ingot；
S3, the fritter that mother alloy ingot obtained in step S2 is broken into 4~6g, broken master alloy is small packaged
Enter in quartz ampoule, quartz ampoule lower ending opening, cut hole (quartz ampoule nozzle) diameter is 0.7~1.0mm, and nozzle is at a distance from roll surface
2~4mm；In vacuum quick quenching equipment, under an argon atmosphere, heated using radio-frequency induction coil, after alloy melts completely,
Under argon pressure effect, master alloy is sprayed through the nozzle of quartzy bottom of the tube, is ejected on the copper roller that revolving speed is 16~25m/s, i.e.,
Permanent-magnet alloy can be obtained.
Further, the purity of raw material Nd, Ce, Fe, B and Hf is not less than 99.9% (weight percent).
Further, electric arc furnaces is the electric arc furnaces of argon gas protection.
Compared with prior art, the advantages and positive effects of the present invention are:
High-coercive force neodymium ferrocerium boron permanent-magnet alloy of the invention can effectively be pressed down by the addition element Hf in raw material
Main phase Nd processed2Fe14B crystal grain is grown up, and is obtained compared with little crystallite size, and the consistent microstructure that is evenly distributed, comprehensive magnetic can obtain
Promotion is arrived.And high-coercive force neodymium ferrocerium boron permanent-magnet alloy preparation method of the invention does not need annealing heat-treatment, technique letter
Single, and cost is relatively low, composition proportion is novel, in no heavy rare earth Dy or Tb and in the case where be free of strategic resource Co, by part Ce
It remains to reach higher coercivity after substitution Nd element.The price of rare earth element ce is compared with rare earth element nd has apparent valence
Lattice advantage can reduce production cost, reinforce the competitiveness of enterprise, balance the utilization rate of light rare earth, be suitable for enterprise scale and produce.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is (Nd prepared by the embodiment of the present invention 10.8Ce0.2)13Fe82B5(the Nd prepared with embodiment 20.8Ce0.2)13Fe81B5The demagnetizing curve comparison diagram of Hf permanent-magnet alloy；
Fig. 2 is (Nd prepared by the embodiment of the present invention 10.8Ce0.2)13Fe82B5(the Nd prepared with embodiment 30.8Ce0.2)13Fe80B5Hf2The demagnetizing curve comparison diagram of permanent-magnet alloy；
Fig. 3 is (Nd prepared by the embodiment of the present invention 10.8Ce0.2)13Fe82B5The transmission electron microscope picture (TEM) of permanent-magnet alloy；
Fig. 4 is (Nd prepared by the embodiment of the present invention 20.8Ce0.2)13Fe81B5The transmission electron microscope picture of Hf permanent-magnet alloy
(TEM)；
Fig. 5 is (Nd prepared by the embodiment of the present invention 30.8Ce0.2)13Fe80B5Hf2The transmission electron microscope picture of permanent-magnet alloy
(TEM)。
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.
Embodiment 1:
A kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy, nominal composition and content are formulated as (Nd0.8Ce0.2)13Fe82B5, preparation method is as follows:
Step 1, according to chemical molecular formula (Nd0.8Ce0.2)13Fe82B5By atomic percent weigh four kinds of element raw material Nd,
Ce, Fe and B.The purity of these four element raw materials is not less than 99.9% (weight percent).
The raw material weighed up in step 1 is put into electric arc furnaces and carries out 5 meltings (argon gas protection) by step 2, obtains after cooling
The relatively uniform mother alloy ingot of ingredient.
Step 3, the fritter that mother alloy ingot obtained in step 2 is broken into 4~6g, by broken master alloy fritter
It is fitted into quartz ampoule, quartz ampoule lower ending opening, cut hole (quartz ampoule nozzle) diameter is 0.7~1.0mm, and nozzle is at a distance from roll surface
For 2~4mm.In vacuum quick quenching equipment, under an argon atmosphere, heated using radio-frequency induction coil, after alloy melts completely,
Under argon pressure effect, master alloy is sprayed through the nozzle of quartzy bottom of the tube, is ejected on the copper roller that revolving speed is 20m/s
Obtain (Nd0.8Ce0.2)13Fe82B5Permanent-magnet alloy.(Nd0.8Ce0.2)13Fe82B5Transmission electron microscope picture (TEM) such as Fig. 3 of permanent-magnet alloy
It is shown.
From the analysis in Fig. 1, (Nd made from the present embodiment0.8Ce0.2)13Fe82B5The magnetic property of permanent-magnet alloy are as follows: Br=
0.78T, Hcj=967kA/m, (BH)max=99kJ/m3。
Embodiment 2
A kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy, nominal composition and content are formulated as (Nd0.8Ce0.2)13Fe81B5Hf, preparation method are as follows:
Step 1, according to chemical molecular formula (Nd0.8Ce0.2)13Fe81B5Hf by atomic percent weigh five kinds of element raw material Nd,
Ce, Fe, B and Hf.The purity of this five kinds of element raw materials is not less than 99.9% (weight percent).
The raw material weighed up in step 1 is put into electric arc furnaces and carries out 5 meltings (argon gas protection) by step 2, obtains after cooling
The relatively uniform mother alloy ingot of ingredient.
Step 3, the fritter that mother alloy ingot obtained in step 2 is broken into 4~6g, by broken master alloy fritter
It is fitted into quartz ampoule, quartz ampoule lower ending opening, cut hole (quartz ampoule nozzle) diameter is 0.7~1.0mm, and nozzle is at a distance from roll surface
For 2~4mm.In vacuum quick quenching equipment, under an argon atmosphere, heated using radio-frequency induction coil, after alloy melts completely,
Under argon pressure effect, master alloy is sprayed through the nozzle of quartzy bottom of the tube, is ejected on the copper roller that revolving speed is 20m/s
Obtain (Nd0.8Ce0.2)13Fe81B5Hf permanent-magnet alloy.(Nd0.8Ce0.2)13Fe81B5The transmission electron microscope picture (TEM) of Hf permanent-magnet alloy is such as
Shown in Fig. 4.
From the analysis in Fig. 1, (Nd made from the present embodiment0.8Ce0.2)13Fe81B5The magnetic property of Hf permanent-magnet alloy are as follows: Br=
0.75T, Hcj=1013kA/m, (BH)max=97kJ/m3。
Embodiment 3
A kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy, nominal composition and content are formulated as (Nd0.8Ce0.2)13Fe80B5Hf2, preparation method is as follows:
Step 1, according to chemical molecular formula (Nd0.8Ce0.2)13Fe80B5Hf2Five kinds of element raw materials are weighed by atomic percent
Nd, Ce, Fe, B and Hf.The purity of this five kinds of element raw materials is not less than 99.9% (weight percent).
The raw material weighed up in step 1 is put into electric arc furnaces and carries out 5 meltings (argon gas protection) by step 2, obtains after cooling
The relatively uniform mother alloy ingot of ingredient.
Step 3, the fritter that mother alloy ingot obtained in step 2 is broken into 4~6g, by broken master alloy fritter
It is fitted into quartz ampoule, quartz ampoule lower ending opening, cut hole (quartz ampoule nozzle) diameter is 0.7~1.0mm, and nozzle is at a distance from roll surface
For 2~4mm.In vacuum quick quenching equipment, under an argon atmosphere, heated using radio-frequency induction coil, after alloy melts completely,
Under argon pressure effect, master alloy is sprayed through the nozzle of quartzy bottom of the tube, is ejected on the copper roller that revolving speed is 20m/s
Obtain (Nd0.8Ce0.2)13Fe80B5Hf2Permanent-magnet alloy.(Nd0.8Ce0.2)13Fe80B5Hf2The transmission electron microscope picture (TEM) of permanent-magnet alloy
As shown in Figure 5.
It is analyzed as Fig. 2 it is found that (Nd made from the present embodiment0.8Ce0.2)13Fe80B5Hf2The magnetic property of permanent-magnet alloy are as follows: Br
=0.72T, Hcj=1031kA/m, (BH)max=88kJ/m3。
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above are modified or are modified
For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention
Any simple modification, equivalent change and modification to the above embodiments, still falls within the range of technical solution of the present invention
It is interior.
Claims (4)
1. a kind of high-coercive force neodymium ferrocerium boron permanent-magnet alloy, it is characterised in that: the chemical formula of the material is (Nd0.8Ce0.2)13Fe82-xB5Hfx, wherein 0≤x≤2.
2. a kind of preparation method for preparing high-coercive force neodymium ferrocerium boron permanent-magnet alloy as described in claim 1, it is characterised in that: packet
Include following steps:
S1, according to chemical molecular general formula (Nd0.8Ce0.2)13Fe82-xB5HfxWeighing prepare RE permanent magnetic alloy raw material Nd, Ce,
Fe, B and Hf；X is atomicity in formula, and the raw material is 0.8*13, rare earth with atomic percentage, the atomic percent of rare earth Nd
The atomic percent of Ce is 0.2*13, and the atomic percent of Fe is 82-x, and the atomic percent that the atomic percent of B is 5, Hf is
x；
S2, it raw material is put into electric arc furnaces carries out 5~6 meltings, obtain the relatively uniform mother alloy ingot of ingredient after cooling；
Broken master alloy fritter is packed into stone by S3, the fritter that mother alloy ingot obtained in step S2 is broken into 4~6g
Ying Guanzhong, quartz ampoule lower ending opening, cut hole diameter are 0.7~1.0mm, and nozzle is 2~4mm at a distance from roll surface；It is fast in vacuum
In quenching equipment, under an argon atmosphere, heated using radio-frequency induction coil, after alloy melts completely, under argon pressure effect,
Master alloy is sprayed through the nozzle of quartzy bottom of the tube, is ejected on the copper roller that revolving speed is 16~25m/s, permanent-magnet alloy can be obtained.
3. the preparation method of high-coercive force neodymium ferrocerium boron permanent-magnet alloy as claimed in claim 2, it is characterised in that: raw material Nd,
The purity of Ce, Fe, B and Hf are not less than 99.9%.
4. the preparation method of high-coercive force neodymium ferrocerium boron permanent-magnet alloy as claimed in claim 2, it is characterised in that: electric arc furnaces is
The electric arc furnaces of argon gas protection.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211792A (en) * | 2019-04-28 | 2019-09-06 | 深圳市吉胜华力科技有限公司 | A kind of rare earth permanent-magnetic material preparation method |
| CN110211793A (en) * | 2019-04-28 | 2019-09-06 | 深圳市吉胜华力科技有限公司 | A kind of rare earth permanent-magnetic material preparation method |
| CN112201429A (en) * | 2020-10-14 | 2021-01-08 | 燕山大学 | Permanent magnet with nanoscale gradient structure and preparation method thereof |
| WO2024045470A1 (en) * | 2022-08-30 | 2024-03-07 | 广东省科学院资源利用与稀土开发研究所 | Growth method for rare earth-ferrite-boron permanent magnet single crystal using fluxing agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02101710A (en) * | 1988-10-11 | 1990-04-13 | Hitachi Metals Ltd | Permanent magnet and manufacture thereof |
| CN106024244A (en) * | 2016-07-21 | 2016-10-12 | 江西理工大学 | High-heat-stability nanocrystal rare-earth permanent-magnet material and preparation method thereof |
-
2018
- 2018-06-25 CN CN201810659415.8A patent/CN109065311A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02101710A (en) * | 1988-10-11 | 1990-04-13 | Hitachi Metals Ltd | Permanent magnet and manufacture thereof |
| CN106024244A (en) * | 2016-07-21 | 2016-10-12 | 江西理工大学 | High-heat-stability nanocrystal rare-earth permanent-magnet material and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211792A (en) * | 2019-04-28 | 2019-09-06 | 深圳市吉胜华力科技有限公司 | A kind of rare earth permanent-magnetic material preparation method |
| CN110211793A (en) * | 2019-04-28 | 2019-09-06 | 深圳市吉胜华力科技有限公司 | A kind of rare earth permanent-magnetic material preparation method |
| CN112201429A (en) * | 2020-10-14 | 2021-01-08 | 燕山大学 | Permanent magnet with nanoscale gradient structure and preparation method thereof |
| CN112201429B (en) * | 2020-10-14 | 2021-12-21 | 燕山大学 | Permanent magnet with nanoscale gradient structure and preparation method thereof |
| WO2024045470A1 (en) * | 2022-08-30 | 2024-03-07 | 广东省科学院资源利用与稀土开发研究所 | Growth method for rare earth-ferrite-boron permanent magnet single crystal using fluxing agent |
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Application publication date: 20181221 |