CN105206414A - Method for preparing Ce-doped NdFeB thermal deformation magnet - Google Patents
Method for preparing Ce-doped NdFeB thermal deformation magnet Download PDFInfo
- Publication number
- CN105206414A CN105206414A CN201510682099.2A CN201510682099A CN105206414A CN 105206414 A CN105206414 A CN 105206414A CN 201510682099 A CN201510682099 A CN 201510682099A CN 105206414 A CN105206414 A CN 105206414A
- Authority
- CN
- China
- Prior art keywords
- magnet
- doped
- cerium
- obtains
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a method for preparing a Ce-doped NdFeB thermal deformation magnet. The method comprises the following steps: carrying out vacuum floating melting to obtain an alloy ingot of which the main phase is (CeNd)2Fe14B, the Ce content is 10-20wt% of the total alloy content and the content of the doped element Co is lower than or equal to 1%, and adding the elements Ta and Nb, wherein the total adding amount of Ta and Nb is 0-5%; conducting vacuum melt-spinning on the (CeNd)2Fe14B alloy to obtain a casting piece; conducting ball-milling on the casting piece to obtain powder; conducting thermal pressing and thermal deformation on the powder to obtain the magnet. The method has the advantages that the element Dy is eliminated on the basis that no heavy rare earth element is added, so that the using amount of heavy rare earth in NdFeB is reduced accordingly, the stable magnetic performance is guaranteed, the cost is reduced, and a novel application field is provided for light rare earth; the maximum magnetic energy product of the obtained magnet ranges between 15-35 MGOe, and the magnet is applicable to the fields of small and special electrical machines, magnetic sensors and the like.
Description
Technical field
The present invention relates to a kind of preparation method of RE permanent magnetic alloy, particularly a kind of hot-pressed magnets preparation method of neodymium iron boron of doped with cerium.
Background technology
The reserves of thulium cerium are large, and the reserves (accounting for 50% of the terres rares content of bastnaesite) of cerium (Ce) are three times of Nd and Pr summation, and its price is low.And existing Sintered NdFeB magnet increases magnet serviceability temperature by adding heavy rare earth element dysprosium, heavy rare earth element dysprosium has irreplaceable effect in the production of neodymium iron boron, heavy rare earth dysprosium is rare rare earth element, and be the exclusive product of southern ion type rareearth ore, therefore price is high.In recent years, holding at high price of heavy rare earth element dysprosium and terbium, and owing to market having excessive Ce, the price of cerium is on the low side, quantity in stock is large, so the research of Ce base permanent magnet is significant.Development ferrocerium boron replaces the neodymium iron boron product of low side, reduces costs, have market prospects while guarantee magnetic property.Hot pressing neodymium iron boron possesses extremely strong competitiveness in the neodymium iron boron field of alternative interpolation heavy rare earth.Add the hot pressing Nd-Fe-B permanent magnet (CeNd) of cerium
2fe
14b is significant.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of neodymium iron boron heat distortion magnet of doped with cerium, i.e. a kind of novel rare earth alloys, this alloy ensure that magnetic property on the basis not increasing heavy rare earth element.
In order to reach above-mentioned purpose, solution of the present invention is:
A preparation method for the neodymium iron boron hot-pressed magnets of doped with cerium, production stage comprises:
The first step, by vacuum levitation melting, obtains principal phase for (CeNd) after melting
2fe
14the alloy cast ingot of B, principal phase (CeNd)
2fe
14b mainly plays magnetic property, and cerium content accounts for alloy total amount 10-20wt%, and doped chemical cobalt content is no more than 1%, and adds a small amount of element tantalum, niobium, and the total addition level of tantalum and niobium is 0-5%;
Second step, by (CeNd)
2fe
14b alloy carries out vacuum and gets rid of band, obtains slab;
3rd step, slab, through ball milling, obtains powder;
4th step, powder obtains magnet through hot-pressing thermal deformation technique.
The described first step, puts into suspension smelting furnace by alloy raw material, reaches 10 in vacuum degree
-2be filled with high-purity argon gas during Pa, adjusting monitor system is afterwards 40-65kw.
Alloy cast ingot coarse crushing is the particle of 8-12mm by described second step, and then put into by particle after getting rid of band machine arc-melting, carry out vacuum with the speed of 20-30m/s and get rid of band, vacuum degree reaches 10
-3pa, obtains the strip slab of 2mm.
Described 3rd step, slab is through ball milling, and ball mill passes into aviation kerosine, and particle is wet-milling 3-10h in aviation kerosine, obtains the powder that granularity is 10-20 μm.
Described 4th step, temperature 600-700 DEG C, powder is hot pressed into isotropic magnet under heating rate 80 DEG C/min, pressure 350-450MP, then temperature 750-850 DEG C, carry out thermal deformation under pressure 30-60MP, rate of deformation 0.1-0.6mm/s and obtain anisotropy magnet.
After adopting such scheme, compared with prior art, the present invention forms new magnetic material by the neodymium metal of metallic cerium replacement part, add cobalt, tantalum, niobium etc. in magnetic material and improve its Curie temperature, ferrocerium boron and neodymium iron boron form the performance enhancement of new compound mutual-assistance magnet, magnet of the present invention improves the scope of application of light rare earth cerium, nanocrystalline magnet is obtained by the Nd Fe B alloys hot-pressing thermal distortion of the codopes such as cerium and cobalt, tantalum, niobium, use thermal deformation technique to make the dense structure of this magnet, obtain higher magnetic property.
The invention has the beneficial effects as follows and do not increasing on the basis of heavy rare earth element, reduce dysprosium element, correspondingly reduce the use amount of heavy rare earth in neodymium iron boron.Ensure that stable magnetic property, reduce costs simultaneously, for light rare earth provides a kind of new application.The maximum magnetic energy product of gained magnet, between 15-35MGOe, can be applied to the field such as small and special electric machine, Magnetic Sensor.
Embodiment
example 1
According to chemical formula (Ce
0.2nd
0.8)
31.3fe
67.55b
1.15batching, raw materials used cerium, neodymium, the iron being greater than 95% for purity, the ferro-boron of Boron contents 24%.
The alloy raw material prepared is put into and gets rid of band machine and reach 10 in vacuum degree
-2pour high-purity argon gas during Pa, adjusting monitor system is afterwards 50kw, obtains (Ce
0.2nd
0.8)
31.3fe
67.55b
1.15alloy cast ingot.Be the particle of about 8-12mm by alloy cast ingot coarse crushing, then particle put into after getting rid of band machine arc-melting, carry out getting rid of band with the speed of 20m/s, obtain the strip slab of 2mm.
Slab is through ball milling, and ball mill passes into aviation kerosine, and particle is wet-milling 5h in aviation kerosine, obtains the powder that granularity is 10-20 μm.
By powder under temperature 650 DEG C, heating rate 80 DEG C/min, pressure 380MP, be hot pressed into isotropic magnet, then under temperature 750 DEG C, pressure 50MP, rate of deformation 0.2mm/s, carry out thermal deformation and obtain anisotropy magnet.Gained magnet magnetic energy product is 23MGOe.
example 2
According to chemical formula (Ce
0.3nd
0.7)
28.57fe
69.87b
1.56batching, raw materials used cerium, neodymium, the iron being greater than 95% for purity, the ferro-boron of Boron contents 24%.
The alloy raw material prepared is put into and gets rid of band machine and reach 10 in vacuum degree
-2pour high-purity argon gas during Pa, adjusting monitor system is afterwards 55kw, obtains (Ce
0.3nd
0.7)
28.57fe
69.87b
1.56alloy cast ingot.Be the particle of about 8-12mm by alloy cast ingot coarse crushing, then particle put into after getting rid of band machine arc-melting, carry out getting rid of band with the speed of 25m/s, obtain the strip slab of 2mm.
Slab is through ball milling, and ball mill passes into aviation kerosine, and particle is wet-milling 7h in aviation kerosine, obtains the powder that granularity is 10-20 μm.
By powder under temperature 700 DEG C, heating rate 80 DEG C/min, pressure 400MP, be hot pressed into isotropic magnet, then under temperature 780 DEG C, pressure 40MP, rate of deformation 0.15mm/s, carry out thermal deformation and obtain anisotropy magnet.Gained magnet magnetic energy product is 19.6MGOe.
example 3
According to chemical formula (Ce
0.4nd
0.6)
28.57fe
69.87co
0.8b
1.56batching, raw materials used cerium, neodymium, the iron being greater than 95% for purity, the ferro-boron of Boron contents 24%.
The alloy raw material prepared is put into and gets rid of band machine and reach 10 in vacuum degree
-2pour high-purity argon gas during Pa, adjusting monitor system is afterwards 45kw, obtains (Ce
0.3nd
0.7)
28.57fe
69.87b
1.56alloy cast ingot.Be the particle of about 8-12mm by alloy cast ingot coarse crushing, then particle put into after getting rid of band machine arc-melting, carry out getting rid of band with the speed of 28m/s, obtain the strip slab of 2mm.
Slab is through ball milling, and ball mill passes into aviation kerosine, and particle is wet-milling 7h in aviation kerosine, obtains the powder that granularity is 10-20 μm.
By powder under temperature 680 DEG C, heating rate 80 DEG C/min, pressure 370MP, be hot pressed into isotropic magnet, then under temperature 800 DEG C, pressure 35MP, rate of deformation 0.23mm/s, carry out thermal deformation and obtain anisotropy magnet.Gained magnet magnetic energy product is 27.4MGOe.
example 4
According to chemical formula (Ce
0.3nd
0.7)
32.5fe
63.7co
0.7nb
2.3b
0.8batching, raw materials used cerium, neodymium, the iron being greater than 95% for purity, the ferro-boron of Boron contents 24%.
The alloy raw material prepared is put into and gets rid of band machine and reach 10 in vacuum degree
-2pour high-purity argon gas during Pa, adjusting monitor system is afterwards 60kw, obtains (Ce
0.3nd
0.7)
28.57fe
69.87b
1.56alloy cast ingot.Be the particle of about 8-12mm by alloy cast ingot coarse crushing, then particle put into after getting rid of band machine arc-melting, carry out getting rid of band with the speed of 23m/s, obtain the strip slab of 2mm.
Slab is through ball milling, and ball mill passes into aviation kerosine, and particle is wet-milling 7h in aviation kerosine, obtains the powder that granularity is 10-20 μm.
By powder under temperature 620 DEG C, heating rate 80 DEG C/min, pressure 410MP, be hot pressed into isotropic magnet, then under temperature 820 DEG C, pressure 41MP, rate of deformation 0.3mm/s, carry out thermal deformation and obtain anisotropy magnet.Gained magnet magnetic energy product is 25.1MGOe.
example 5
According to chemical formula (Ce
0.4nd
0.6)
31.2fe
66.27co
0.9ta
0.73b
0.9batching, raw materials used cerium, neodymium, the iron being greater than 95% for purity, the ferro-boron of Boron contents 24%.
The alloy raw material prepared is put into and gets rid of band machine and reach 10 in vacuum degree
-2pour high-purity argon gas during Pa, adjusting monitor system is afterwards 62kw, obtains (Ce
0.3nd
0.7)
28.57fe
69.87b
1.56alloy cast ingot.Be the particle of about 8-12mm by alloy cast ingot coarse crushing, then particle put into after getting rid of band machine arc-melting, carry out getting rid of band with the speed of 23m/s, obtain the strip slab of 2mm.
Slab is through ball milling, and ball mill passes into aviation kerosine, and particle is wet-milling 7h in aviation kerosine, obtains the powder that granularity is 10-20 μm.
By powder under temperature 670 DEG C, heating rate 80 DEG C/min, pressure 430MP, be hot pressed into isotropic magnet, then under temperature 800 DEG C, pressure 44MP, rate of deformation 0.4mm/s, carry out thermal deformation and obtain anisotropy magnet.Gained magnet magnetic energy product is 23.6MGOe.
Claims (5)
1. a preparation method for the neodymium iron boron hot-pressed magnets of doped with cerium, is characterized in that production stage comprises:
The first step, by vacuum levitation melting, obtains principal phase for (CeNd) after melting
2fe
14the alloy cast ingot of B, cerium content accounts for alloy total amount 10-20wt%, and doped chemical cobalt content is less than 1%, and Addition ofelements tantalum, niobium, the total addition level of tantalum and niobium is 0-5%;
Second step, by (CeNd)
2fe
14b alloy carries out vacuum and gets rid of band, obtains slab;
3rd step, slab, through ball milling, obtains powder;
4th step, powder obtains magnet through hot-pressing thermal deformation technique.
2. the preparation method of the neodymium iron boron hot-pressed magnets of a kind of doped with cerium as claimed in claim 1, is characterized in that: the described first step, alloy raw material is put into suspension smelting furnace, reaches 10 in vacuum degree
-2be filled with high-purity argon gas during Pa, adjusting monitor system is afterwards 40-65kw.
3. the preparation method of the neodymium iron boron hot-pressed magnets of a kind of doped with cerium as claimed in claim 1, it is characterized in that: described second step, be the particle of 8-12mm by alloy cast ingot coarse crushing, then particle is put into after getting rid of band machine arc-melting, carry out vacuum with the speed of 20-30m/s and get rid of band, vacuum degree reaches 10
-3pa, obtains the strip slab of 2mm.
4. the preparation method of the neodymium iron boron hot-pressed magnets of a kind of doped with cerium as claimed in claim 1, it is characterized in that: described 3rd step, slab is through ball milling, and ball mill passes into aviation kerosine, particle is wet-milling 3-10h in aviation kerosine, obtains the powder that granularity is 10-20 μm.
5. the preparation method of the neodymium iron boron hot-pressed magnets of a kind of doped with cerium as claimed in claim 1, it is characterized in that: described 4th step, temperature 600-700 DEG C, powder is hot pressed into isotropic magnet under heating rate 80 DEG C/min, pressure 350-450MP, then temperature 750-850 DEG C, carry out thermal deformation under pressure 30-60MP, rate of deformation 0.1-0.6mm/s and obtain anisotropy magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510682099.2A CN105206414A (en) | 2015-10-21 | 2015-10-21 | Method for preparing Ce-doped NdFeB thermal deformation magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510682099.2A CN105206414A (en) | 2015-10-21 | 2015-10-21 | Method for preparing Ce-doped NdFeB thermal deformation magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105206414A true CN105206414A (en) | 2015-12-30 |
Family
ID=54954029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510682099.2A Pending CN105206414A (en) | 2015-10-21 | 2015-10-21 | Method for preparing Ce-doped NdFeB thermal deformation magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105206414A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513738A (en) * | 2016-01-28 | 2016-04-20 | 龙岩紫荆创新研究院 | Preparation method of hot-pressed nitrogenized magnet |
| CN112885550A (en) * | 2021-01-14 | 2021-06-01 | 沈阳新橡树磁性材料有限公司 | Preparation method of high-density cerium-based hot-pressed rare earth magnetic steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120620A (en) * | 1999-02-12 | 2000-09-19 | General Electric Company | Praseodymium-rich iron-boron-rare earth composition, permanent magnet produced therefrom, and method of making |
| CN1735947A (en) * | 2002-05-24 | 2006-02-15 | 代顿大学 | Nanocrystalline and nanocomposite rare earth permanent magnet materials and method of making the same |
| CN102220538A (en) * | 2011-05-17 | 2011-10-19 | 南京理工大学 | Sintered neodymium-iron-boron preparation method capable of improving intrinsic coercivity and anticorrosive performance |
| CN102693799A (en) * | 2012-06-12 | 2012-09-26 | 钢铁研究总院 | Electromagnetically-solidified and hot-pressed nanocrystalline magnet of permanent magnet rapidly-quenched ribbon and preparation method of electromagnetically-solidified and hot-pressed nanocrystalline magnet |
| CN104576028A (en) * | 2014-12-30 | 2015-04-29 | 四川大学 | Methods for manufacturing cerium-rich anisotropy nano-crystalline rare-earth permanent magnets |
-
2015
- 2015-10-21 CN CN201510682099.2A patent/CN105206414A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120620A (en) * | 1999-02-12 | 2000-09-19 | General Electric Company | Praseodymium-rich iron-boron-rare earth composition, permanent magnet produced therefrom, and method of making |
| CN1735947A (en) * | 2002-05-24 | 2006-02-15 | 代顿大学 | Nanocrystalline and nanocomposite rare earth permanent magnet materials and method of making the same |
| CN102220538A (en) * | 2011-05-17 | 2011-10-19 | 南京理工大学 | Sintered neodymium-iron-boron preparation method capable of improving intrinsic coercivity and anticorrosive performance |
| CN102693799A (en) * | 2012-06-12 | 2012-09-26 | 钢铁研究总院 | Electromagnetically-solidified and hot-pressed nanocrystalline magnet of permanent magnet rapidly-quenched ribbon and preparation method of electromagnetically-solidified and hot-pressed nanocrystalline magnet |
| CN104576028A (en) * | 2014-12-30 | 2015-04-29 | 四川大学 | Methods for manufacturing cerium-rich anisotropy nano-crystalline rare-earth permanent magnets |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513738A (en) * | 2016-01-28 | 2016-04-20 | 龙岩紫荆创新研究院 | Preparation method of hot-pressed nitrogenized magnet |
| CN112885550A (en) * | 2021-01-14 | 2021-06-01 | 沈阳新橡树磁性材料有限公司 | Preparation method of high-density cerium-based hot-pressed rare earth magnetic steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102903472B (en) | A kind of Sintered NdFeB magnet and preparation method thereof | |
| CN103996477B (en) | The preparation method of the crystal boundary modified Sintered NdFeB magnet against corrosion of copper and tin | |
| CN103187133B (en) | A kind of RE permanent magnetic alloy and Magnetic Phase composite preparation process thereof | |
| CN104700973B (en) | A kind of rare-earth permanent magnet being made up of the common association raw ore mischmetal of Bayan Obo and preparation method thereof | |
| CN103103442A (en) | Method for preparing neodymium-iron-boron material through main-auxiliary alloy method | |
| CN103506626B (en) | Manufacturing method for improving sintered NdFeB magnet coercive force | |
| CN106128674A (en) | A kind of double Hard Magnetic principal phase mischmetal permanent magnet and preparation method thereof | |
| CN103545079A (en) | Double-principal-phase yttrium-contained permanent magnet and preparing method of double-principal-phase yttrium-contained permanent magnet | |
| CN108133799A (en) | A kind of high performance nano-crystal thermal deformation Nd-Fe-B permanent magnet and preparation method thereof | |
| CN105225781A (en) | A kind of high corrosion-resistant many Hard Magnetics principal phase Ce permanent magnet and preparation method thereof | |
| CN104900360A (en) | Novel permanent magnet alloy with composite low-price rare earth added and preparation method thereof | |
| CN108154986B (en) | Y-containing high-abundance rare earth permanent magnet and preparation method thereof | |
| CN103834863A (en) | Method for preparing neodymium iron boron permanent magnet material by using associated mixed rare earth | |
| CN104575901A (en) | Neodymium iron boron magnet added with terbium powder and preparation method thereof | |
| CN107275027A (en) | Cerium-rich rare earth permanent magnet using yttrium and preparation method thereof | |
| CN107689279A (en) | One kind improves the coercitive method of sintered NdFeB built-up magnet | |
| CN104575902A (en) | Neodymium iron boron magnet added with cerium and preparation method thereof | |
| CN105118655A (en) | Method for preparing high-coercivity magnet by modifying nano zinc powder crystal boundary | |
| CN106298134B (en) | A kind of double main phase agglomeration permanent magnetic materials and preparation method and application | |
| CN101393791B (en) | Anisotropic magnetic powder and manufacturing method thereof | |
| CN102982935B (en) | A kind of without heavy rare earth permanent magnetic material and hot pressing method for preparing thereof | |
| CN105206414A (en) | Method for preparing Ce-doped NdFeB thermal deformation magnet | |
| CN104952580A (en) | Corrosion-resistant sintered NdFeB magnet and manufacturing method thereof | |
| CN112712986B (en) | Low-temperature coefficient Sm2Co17Molded sintered magnet and method for producing same | |
| CN104821226A (en) | Method for making high-square-degree sintered NdFeB permanent magnets with cerium, titanium, cobalt and zirconium compound additive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151230 |