CN106024246A - Corrosion-resistant neodymium-iron-boron magnetic material and preparation method thereof - Google Patents

Corrosion-resistant neodymium-iron-boron magnetic material and preparation method thereof Download PDF

Info

Publication number
CN106024246A
CN106024246A CN201610622816.7A CN201610622816A CN106024246A CN 106024246 A CN106024246 A CN 106024246A CN 201610622816 A CN201610622816 A CN 201610622816A CN 106024246 A CN106024246 A CN 106024246A
Authority
CN
China
Prior art keywords
neodymium
magnetic material
iron
boron
corrosion
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
Application number
CN201610622816.7A
Other languages
Chinese (zh)
Inventor
莫肯堂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangxi Nanning Shengqian Technology Development Co Ltd
Original Assignee
Guangxi Nanning Shengqian Technology Development Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangxi Nanning Shengqian Technology Development Co Ltd filed Critical Guangxi Nanning Shengqian Technology Development Co Ltd
Priority to CN201610622816.7A priority Critical patent/CN106024246A/en
Publication of CN106024246A publication Critical patent/CN106024246A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2201/00—Treatment under specific atmosphere
    • B22F2201/20—Use of vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

The invention discloses a corrosion-resistant neodymium-iron-boron magnetic material and a preparation method thereof. The neodymium-iron-boron magnetic material is prepared from, by weight, 30% of neodymium, 1% of boron, 2% of dysprosium, 1% of praseodymium, 2% of zirconium, 3% of copper, 2% of cobalt and the balance iron. The preparation method of the neodymium-iron-boron magnetic material comprises the steps of batching, smelting, hydrogen decrepitating, powder preparing, molding and sintering. According to the corrosion-resistant neodymium-iron-boron magnetic material and the preparation method thereof, the proportion contents of all the elements in the neodymium-iron-boron material are re-optimized, and the zirconium element and the cobalt element are newly added; research shows that the Curie temperature of a magnet can be effectively increased by adding cobalt, cobalt exists between a soft magnetic phase and a hard magnetic phase, and therefore not only can the temperature coefficient be lowered, but also the corrosion resistance of the material can be improved; by adding cobalt in NdFeB-FeB series alloy, the crystallization temperature of a Fe3B phase can be increased, the crystallization temperature of Nd3Fe14B can be decreased, and therefore uniform crystallized precipitated phase grain size distribution is obtained.

Description

A kind of corrosion-resistant R-Fe-B magnetic material and preparation method thereof
Technical field
The present invention relates to a kind of corrosion-resistant R-Fe-B magnetic material and preparation method thereof.
Background technology
Research and the applicating history of permanent magnet material are of long standing and well established, and ancient Chinese had the most once manufactured " compass in ancient China " in order to take one's bearings with permanent magnet.After entering Industrial Revolution in modern age, permanent magnet material goes through the developmental stage such as magnet steel, permanent-magnet ferrite, AlNiCo alloy, SmCo series alloy, NdFeB permanent magnet.At present, the rare earth permanent-magnetic material with NdFeB as representative is the permanent magnet material that magnetic property is the highest, most widely used.NdFeB based permanent magnet, from finding so far, has the history in more than 20 years, has had been enter into the stage of large-scale industrial production at present, but the research work for Nd Fe B alloys never stops.Many scholars and research team all spend a lot of energy to explore and study the improvement of Nd Fe B alloys magnetic property, including improving its heat stability, corrosion resistance, machinability and ageing.It is true that the magnetic property of Sintered NdFeB based permanent magnet need to improve.In the PRODUCTION TRAITS of sintered NdFeB, it is one of effective approach that interpolation alloying element improves the magnetic property of magnet.If Chinese Patent Application No. is 201310064736.0 to disclose a kind of neodymium-iron-boron magnetic material with LREE and preparation method, it is to utilize to add in manufacture rare-earth permanent magnet material by a certain percentage by light rare earth remote (La-Ce), improve the utilization rate of rare earth material, reduce the manufacturing cost of rare-earth permanent magnet.
Summary of the invention
It is an object of the invention to provide corrosion-resistant R-Fe-B magnetic material of a kind of new formula new proportioning content and preparation method thereof.The present invention, by adjusting the proportioning of each element in neodymium-iron-boron magnetic material and adding new element, improves structure, thus obtains the more stable excellent magnetic material of properties.
To achieve these goals, present invention employs techniques below scheme:
A kind of corrosion-resistant R-Fe-B magnetic material, it consists of the following components in percentage by weight: neodymium 30%, boron 1%, dysprosium 2%, praseodymium 1%, zirconium 2%, copper 3%, cobalt 2%, surplus are ferrum.
A kind of method preparing above-mentioned corrosion-resistant R-Fe-B magnetic material, comprises the following steps:
Step one dispensing, weighs raw material according to the content proportioning of component each in neodymium-iron-boron magnetic material；
Step 2 melting, first by neodymium, praseodymium in 1100 DEG C of fusings, is subsequently adding dysprosium, copper in 1500 DEG C of fusings, adds boron, zirconium, cobalt, ferrum in 2000 DEG C of fusings, and after then the said components of all fusings being sufficiently mixed, casting is cooled to neodymium iron boron block；
Step 3 hydrogen is broken, and neodymium iron boron block is put into hydrogen crushing device, and prepared granularity is 0.5mm particles below；
Step 4 powder process, carries out airflow milling powder by broken for hydrogen good granule, and powder size reaches below 1 μm；
Step 5 molding, mixes above-mentioned powder in batch mixer more than 2 hours, is pressed into blank with mould in the environment of stationary magnetic field；
Step 6 sinters, and by blank pre-burning 2 hours under 500 DEG C of vacuum conditions, sinters 4 hours in 1200 DEG C in placing into vacuum drying oven, after being then tempered to 800 DEG C of insulations 2 hours, is incubated 2 hours then at 400 DEG C, i.e. can get corrosion-resistant R-Fe-B magnetic material finished product.
Advantages of the present invention:
In the present invention, the proportioning content of each element in inventor's re-optimization neodymium-iron-boron magnetic material, and newly added zirconium, cobalt element；Showing according to the study, the addition of zirconium with crystal grain thinning, can improve the coercivity of magnet, can strengthen the coupling between Hard Magnetic phase and soft magnetism phase, strengthen the comprehensive magnetic energy of magnetic material.The addition of cobalt can be effectively improved the Curie temperature of magnet, and cobalt is present between soft magnetism phase and Hard Magnetic phase, is possible not only to reduce temperature coefficient, it is also possible to improve the corrosion resistance of material.In NdFeB/FeB system alloy, add cobalt can improve Fe3The crystallization temperature of B phase, reduces Nd2Fe14The crystallization temperature of B, thus be conducive to obtaining homogeneous Educt of crystals particle size distribution.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described.
Embodiment:
A kind of corrosion-resistant R-Fe-B magnetic material, it consists of the following components in percentage by weight: neodymium 30%, boron 1%, dysprosium 2%, praseodymium 1%, zirconium 2%, copper 3%, cobalt 2%, surplus are ferrum.
The preparation method of above-mentioned corrosion-resistant R-Fe-B magnetic material, comprises the following steps:
Step one dispensing, weighs raw material according to the content proportioning of component each in neodymium-iron-boron magnetic material；
Step 2 melting, first by neodymium, praseodymium in 1100 DEG C of fusings, is subsequently adding dysprosium, copper in 1500 DEG C of fusings, adds boron, zirconium, cobalt, ferrum in 2000 DEG C of fusings, and after then the said components of all fusings being sufficiently mixed, casting is cooled to neodymium iron boron block；
Step 3 hydrogen is broken, and neodymium iron boron block is put into hydrogen crushing device, and prepared granularity is 0.5mm particles below；
Step 4 powder process, carries out airflow milling powder by broken for hydrogen good granule, and powder size reaches below 1 μm；
Step 5 molding, mixes above-mentioned powder in batch mixer more than 2 hours, is pressed into blank with mould in the environment of stationary magnetic field；
Step 6 sinters, and by blank pre-burning 2 hours under 500 DEG C of vacuum conditions, sinters 4 hours in 1200 DEG C in placing into vacuum drying oven, after being then tempered to 800 DEG C of insulations 2 hours, is incubated 2 hours then at 400 DEG C, i.e. can get corrosion-resistant R-Fe-B magnetic material finished product.

Claims (2)

1. a corrosion-resistant R-Fe-B magnetic material, it is characterised in that it consists of the following components in percentage by weight: neodymium 30%, boron 1%, dysprosium 2%, praseodymium 1%, zirconium 2%, copper 3%, cobalt 2%, surplus are ferrum.
2. the method preparing corrosion-resistant R-Fe-B magnetic material as claimed in claim 1, it is characterised in that comprise the following steps:
Step one dispensing, weighs raw material according to the content proportioning of component each in neodymium-iron-boron magnetic material；
Step 2 melting, first by neodymium, praseodymium in 1100 DEG C of fusings, is subsequently adding dysprosium, copper in 1500 DEG C of fusings, adds boron, zirconium, cobalt, ferrum in 2000 DEG C of fusings, and after then the said components of all fusings being sufficiently mixed, casting is cooled to neodymium iron boron block；
Step 3 hydrogen is broken, and neodymium iron boron block is put into hydrogen crushing device, and prepared granularity is 0.5mm particles below；
Step 4 powder process, carries out airflow milling powder by broken for hydrogen good granule, and powder size reaches below 1 μm；
Step 5 molding, mixes above-mentioned powder in batch mixer more than 2 hours, is pressed into blank with mould in the environment of stationary magnetic field；
Step 6 sinters, and by blank pre-burning 2 hours under 500 DEG C of vacuum conditions, sinters 4 hours in 1200 DEG C in placing into vacuum drying oven, after being then tempered to 800 DEG C of insulations 2 hours, is incubated 2 hours then at 400 DEG C, i.e. can get corrosion-resistant R-Fe-B magnetic material finished product.
CN201610622816.7A 2016-08-02 2016-08-02 Corrosion-resistant neodymium-iron-boron magnetic material and preparation method thereof Pending CN106024246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610622816.7A CN106024246A (en) 2016-08-02 2016-08-02 Corrosion-resistant neodymium-iron-boron magnetic material and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610622816.7A CN106024246A (en) 2016-08-02 2016-08-02 Corrosion-resistant neodymium-iron-boron magnetic material and preparation method thereof

Publications (1)

Publication Number Publication Date
CN106024246A true CN106024246A (en) 2016-10-12

Family

ID=57134296

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610622816.7A Pending CN106024246A (en) 2016-08-02 2016-08-02 Corrosion-resistant neodymium-iron-boron magnetic material and preparation method thereof

Country Status (1)

Country Link
CN (1) CN106024246A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111933374A (en) * 2020-06-30 2020-11-13 宁波元辰新材料有限公司 Sintered neodymium-iron-boron permanent magnet material and preparation method thereof
CN113161093A (en) * 2021-01-19 2021-07-23 宁波晟誉磁电科技有限公司 Neodymium iron boron magnetic material and preparation method thereof
CN115206665A (en) * 2022-09-14 2022-10-18 宁波科宁达工业有限公司 Neodymium-iron-boron permanent magnet and preparation method thereof
CN116313353A (en) * 2023-05-23 2023-06-23 包头天石稀土新材料有限责任公司 Neodymium-iron-boron magnet and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6444052B1 (en) * 1999-10-13 2002-09-03 Aichi Steel Corporation Production method of anisotropic rare earth magnet powder
CN101552062A (en) * 2008-12-09 2009-10-07 宁波同创强磁材料有限公司 Medium-to-high grade neodymium-iron-boron magnet with composite addition of gadolinium and holmium
CN102436889A (en) * 2011-11-16 2012-05-02 宁波同创强磁材料有限公司 Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof
CN104252938A (en) * 2014-09-12 2014-12-31 沈阳中北通磁科技股份有限公司 Multi-main phase Ho-containing NdFeB (neodymium iron boron) permanent magnet and manufacturing method thereof
CN104575898A (en) * 2013-10-10 2015-04-29 三环瓦克华（北京）磁性器件有限公司 Sintered Nd-Fe-B rare earth material and manufacturing method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6444052B1 (en) * 1999-10-13 2002-09-03 Aichi Steel Corporation Production method of anisotropic rare earth magnet powder
CN101552062A (en) * 2008-12-09 2009-10-07 宁波同创强磁材料有限公司 Medium-to-high grade neodymium-iron-boron magnet with composite addition of gadolinium and holmium
CN102436889A (en) * 2011-11-16 2012-05-02 宁波同创强磁材料有限公司 Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof
CN104575898A (en) * 2013-10-10 2015-04-29 三环瓦克华（北京）磁性器件有限公司 Sintered Nd-Fe-B rare earth material and manufacturing method thereof
CN104252938A (en) * 2014-09-12 2014-12-31 沈阳中北通磁科技股份有限公司 Multi-main phase Ho-containing NdFeB (neodymium iron boron) permanent magnet and manufacturing method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111933374A (en) * 2020-06-30 2020-11-13 宁波元辰新材料有限公司 Sintered neodymium-iron-boron permanent magnet material and preparation method thereof
CN111933374B (en) * 2020-06-30 2024-01-05 宁波元辰新材料有限公司 Sintered NdFeB permanent magnet material and preparation method thereof
CN113161093A (en) * 2021-01-19 2021-07-23 宁波晟誉磁电科技有限公司 Neodymium iron boron magnetic material and preparation method thereof
CN113161093B (en) * 2021-01-19 2024-05-31 宁波晟誉磁电科技有限公司 Neodymium-iron-boron magnet and preparation method thereof
CN115206665A (en) * 2022-09-14 2022-10-18 宁波科宁达工业有限公司 Neodymium-iron-boron permanent magnet and preparation method thereof
CN116313353A (en) * 2023-05-23 2023-06-23 包头天石稀土新材料有限责任公司 Neodymium-iron-boron magnet and preparation method thereof
CN116313353B (en) * 2023-05-23 2023-08-29 包头天石稀土新材料有限责任公司 Neodymium-iron-boron magnet and preparation method thereof

Similar Documents

Publication Publication Date Title
CN102800454B (en) Low-cost double-main phase Ce permanent-magnet alloy and preparation method thereof
CN105655076B (en) Motor many principal phase high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet materials and preparation method thereof
CN105689726B (en) A kind of preparation method for mixing rare earth high-coercive force manganese bismuth alloy magnetic
CN102436889A (en) Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof
CN102456458A (en) High-corrosion-resistance sintered neodymium iron boron magnet and preparation method thereof
CN102412044A (en) Ultralow weightless sintered neodymium iron boron magnetic material and preparation method thereof
CN106024246A (en) Corrosion-resistant neodymium-iron-boron magnetic material and preparation method thereof
CN105702403B (en) A kind of Sintered NdFeB magnet and preparation method
CN103545079A (en) Double-principal-phase yttrium-contained permanent magnet and preparing method of double-principal-phase yttrium-contained permanent magnet
CN103714939B (en) Two Hard Magnetic principal phase magnets of La-Fe base and preparation method thereof
CN104821218A (en) Sintered Nd-Fe-B magnet with zinc-aluminum-titanium-cobalt composite additive and preparation method thereof
CN103971875A (en) Mg-Cu grain boundary modified high-magnetism sintered Nd-Fe-B magnet and preparation process thereof
CN107316727A (en) A kind of sintered NdFeB preparation method
CN105374484A (en) High-coercivity samarium-cobalt permanent magnet material and preparation method thereof
CN104464997B (en) A kind of preparation method of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material
CN106356175B (en) A kind of double main phase Nd2Fe14B-Ce2Fe14B composite permanent magnets and preparation method thereof
CN106158204B (en) A kind of Nd-Fe-B permanent magnet material and preparation method thereof
CN105006327A (en) High-performance Gd containing cast sheet magnet and preparation method thereof
CN106910585B (en) A kind of Nd-Fe-B permanent magnet material and preparation method thereof and motor
CN105118596A (en) Zinc aluminum cobalt compositely-added sintered neodymium iron boron magnet and manufacturing method thereof
CN106024248A (en) Neodymium-iron-boron magnetic material and preparation method thereof
CN103794321B (en) A kind of coating praseodymium iron B permanent magnetic material and preparation method
CN109326404A (en) A kind of neodymium-iron-boron magnetic material and preparation method
CN106252010A (en) Neodymium-iron-boron magnetic material that a kind of anti-wear performance is good and preparation method thereof
CN105070447A (en) High-performance holmium-containing cast sheet magnet and preparation method thereof

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: 20161012