CN109627916A - A kind of preparation method of Sintered NdFeB magnet - Google Patents

A kind of preparation method of Sintered NdFeB magnet Download PDF

Info

Publication number
CN109627916A
CN109627916A CN201811546474.0A CN201811546474A CN109627916A CN 109627916 A CN109627916 A CN 109627916A CN 201811546474 A CN201811546474 A CN 201811546474A CN 109627916 A CN109627916 A CN 109627916A
Authority
CN
China
Prior art keywords
parts
iron boron
magnetic body
neodymium iron
magnet
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
CN201811546474.0A
Other languages
Chinese (zh)
Inventor
徐嘉诚
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.)
Zhejiang Zhong Hang Mstar Technology Ltd
Original Assignee
Zhejiang Zhong Hang Mstar Technology 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 Zhejiang Zhong Hang Mstar Technology Ltd filed Critical Zhejiang Zhong Hang Mstar Technology Ltd
Priority to CN201811546474.0A priority Critical patent/CN109627916A/en
Publication of CN109627916A publication Critical patent/CN109627916A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • 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
    • 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
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2504/00—Epoxy polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/28—Metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2602/00—Organic fillers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0812—Aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0837—Bismuth
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/085—Copper
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0862—Nickel
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

A kind of preparation method of Sintered NdFeB magnet provided by the invention, neodymium iron boron magnetic body is prepared according to proportion first, then neodymium iron boron magnetic body surface frosted is pre-processed, one layer of metallic element of the surface even application of pretreated neodymium iron boron magnetic body, modifying agent and plasticizer is then homogenized into slurry.A kind of preparation method of Sintered NdFeB magnet provided by the invention adds titanium and palladium in neodymium iron boron magnetic body, is conducive to refine magnet crystal grain, to improve the magnetic property of magnet, improves coercivity.It is pre-processed additionally by magnet surface, enables and homogenize slurry and be preferably attached to magnet surface, improve coating in the adhesive force of magnet surface.Slurry is homogenized as composed by metallic element, modifying agent and plasticizer simultaneously, there is mobility height, and internal bond is high, efficiently solves the problems, such as that coating easily falls off, magnet surface coating coated weight is uneven, production operation is difficult to control.

Description

A kind of preparation method of Sintered NdFeB magnet
Technical field
The present invention relates to neodymium iron boron field, in particular to a kind of preparation method of Sintered NdFeB magnet.
Background technique
Neodymium iron boron magnetic body is as third generation rare earth permanent-magnetic material, with the incomparable excellent magnetism of other permanent-magnet materials It can be with high cost performance.Therefore, since self-discovery, extensive research and swift and violent development have been obtained, in computer, communication The high-tech sectors such as electronics, automobile, aviation are used widely.
But with the development of science and technology, the application range of Nd-Fe-B permanent magnet material more expands, in certain fields pair More stringent requirements are proposed for the performances such as coercivity and magnetic the product energy of Nd-Fe-B permanent magnet material, therefore, forever according to existing neodymium iron boron Coercivity, the magnetic energy product for the Nd-Fe-B permanent magnet material that the manufacturing method of magnetic material is produced are not able to satisfy actual needs increasingly.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of preparation method of Sintered NdFeB magnet.
To achieve the goals above, the preparation method of a kind of Sintered NdFeB magnet provided by the invention, including following step It is rapid:
Step 1: by weight by 16-25 parts Nd, 1.0-1.2 parts B, 0.2-0.5 parts Co, 0.05-0.15 parts of Ga, 0.25-0.40 Nb, 2.5-3.5 parts Pr, 0.12-0.25 parts Tb, 70-85 parts Fe, 1-2 parts Ti, 0.5-3 parts of Pd of part are put into induction melting furnace simultaneously It is cast into slab after being inside smelted into uniform molten steel, obtains neodymium iron boron magnetic body after then broken by hydrogen, compacting and sintering；
Step 2: being pre-processed to neodymium iron boron magnetic body surface frosted, then the surface of pretreated neodymium iron boron magnetic body is uniformly sprayed The slurry that homogenizes of one layer of metallic element, modifying agent and plasticizer is applied, the metallic element includes 70-80 parts of aluminium, 10- by weight 15 parts of copper, 3-5 parts of tin, 1-5 parts of bismuths and 1-2 parts of nickel；The modifying agent includes 60-70 parts of epoxy resin, 20-30 by weight Part polyamic acid and 10-15 parts of polyethylene glycol；The plasticizer is one of tributyl citrate, monoalkoxytitanates Or two kinds of mixing.
2-5min is kept the temperature at 40-100 DEG C Step 3: the neodymium iron boron magnetic body after spraying is placed in tunnel type drying tunnel: Then forming a layer thickness on Sintered NdFeB magnet surface is 20-1000 μm of flexible coating, then will uniformly coat flexible coating Neodymium iron boron magnetic body carry out high temperature expand seep heat treatment and lonneal processing.
It is 850-950 DEG C, time 0.5-15h, low tempering temperatures 450-550 that its high temperature, which expands infiltration heat treatment temperature, DEG C, soaking time 2-5h.
A kind of preparation method of Sintered NdFeB magnet provided by the invention adds titanium and palladium in neodymium iron boron magnetic body, favorably In refinement magnet crystal grain, to improve the magnetic property of magnet, coercivity is improved.It is pre-processed additionally by magnet surface, Enable and homogenize slurry and be preferably attached to magnet surface, improves coating in the adhesive force of magnet surface.Simultaneously by metallic element, Slurry is homogenized composed by modifying agent and plasticizer, there is mobility height, and internal bond is high, it is easily de- to efficiently solve coating It falls, the problem that magnet surface coating coated weight is uneven, production operation is uncontrollable.
Specific embodiment
Embodiment 1
A kind of preparation method of Sintered NdFeB magnet provided in this embodiment, comprising the following steps:
Step 1: by weight by 16 parts of Nd, 1.0 parts of B, 0.2 part of Co, 0.05 part of Ga, 0.25 part of Nb, 2.5 parts of Pr, 0.12 part Tb, 70 parts of Fe, 1 part of Ti, 0.5 part of Pd, which are put into induction melting furnace simultaneously after being smelted into uniform molten steel, is cast into slab, then passes through Neodymium iron boron magnetic body is obtained after crossing broken hydrogen, compacting and sintering；
Step 2: being pre-processed to neodymium iron boron magnetic body surface frosted, then the surface of pretreated neodymium iron boron magnetic body is uniformly sprayed The slurry that homogenizes of one layer of metallic element, modifying agent and plasticizer is applied, the metallic element includes 70 parts of aluminium, 10 parts by weight Copper, 3 parts of tin, 1 part of bismuth and 1 part of nickel；The modifying agent includes 60 parts of epoxy resin, 20 parts of polyamic acids and 10 by weight Part polyethylene glycol；The plasticizer is the mixing of one or both of tributyl citrate, monoalkoxytitanates.
2-5min is kept the temperature at 40-100 DEG C Step 3: the neodymium iron boron magnetic body after spraying is placed in tunnel type drying tunnel: Then forming a layer thickness on Sintered NdFeB magnet surface is 20-1000 μm of flexible coating, then will uniformly coat flexible coating Neodymium iron boron magnetic body carry out high temperature expand seep heat treatment and lonneal processing.
It is 850-950 DEG C, time 0.5-15h, low tempering temperatures 450-550 that its high temperature, which expands infiltration heat treatment temperature, DEG C, soaking time 2-5h.
Embodiment 2
The preparation method of a kind of Sintered NdFeB magnet provided in this embodiment, the difference from embodiment 1 is that the neodymium iron Boron magnet includes 25 parts of Nd, 1.2 parts of B, 0.5 part of Co, 0.15 part of Ga, 0.40 part of Nb, 3.5 parts of Pr, 0.25 part of Tb, 85 by weight Part Fe, 2 parts of Ti, 3 parts of Pd.
Embodiment 3
The preparation method of a kind of Sintered NdFeB magnet provided in this embodiment, the difference from embodiment 1 is that the metal Element includes 80 parts of aluminium, 15 parts of copper, 5 parts of tin, 5 parts of bismuths and 2 parts of nickel by weight.
Embodiment 4
A kind of preparation method of Sintered NdFeB magnet provided in this embodiment, the difference from embodiment 1 is that；The modification Agent includes 70 parts of epoxy resin, 30 parts of polyamic acids and 15 parts of polyethylene glycol by weight.

Claims (2)

1. a kind of preparation method of Sintered NdFeB magnet, which comprises the following steps:
Step 1: by weight by 16-25 parts Nd, 1.0-1.2 parts B, 0.2-0.5 parts Co, 0.05-0.15 parts of Ga, 0.25-0.40 Nb, 2.5-3.5 parts Pr, 0.12-0.25 parts Tb, 70-85 parts Fe, 1-2 parts Ti, 0.5-3 parts of Pd of part are put into induction melting furnace simultaneously It is cast into slab after being inside smelted into uniform molten steel, obtains neodymium iron boron magnetic body after then broken by hydrogen, compacting and sintering；
Step 2: being pre-processed to neodymium iron boron magnetic body surface frosted, then the surface of pretreated neodymium iron boron magnetic body is uniformly sprayed The slurry that homogenizes of one layer of metallic element, modifying agent and plasticizer is applied, the metallic element includes 70-80 parts of aluminium, 10- by weight 15 parts of copper, 3-5 parts of tin, 1-5 parts of bismuths and 1-2 parts of nickel；The modifying agent includes 60-70 parts of epoxy resin, 20-30 by weight Part polyamic acid and 10-15 parts of polyethylene glycol；The plasticizer is one of tributyl citrate, monoalkoxytitanates Or two kinds of mixing；
2-5min is kept the temperature at 40-100 DEG C Step 3: the neodymium iron boron magnetic body after spraying is placed in tunnel type drying tunnel: then Forming a layer thickness on Sintered NdFeB magnet surface is 20-1000 μm of flexible coating, then the neodymium that will uniformly coat flexible coating Iron boron magnet carries out high temperature and expands infiltration heat treatment and lonneal processing.
2. a kind of preparation method of Sintered NdFeB magnet according to claim 1, which is characterized in that its high temperature, which expands, seeps Heat treatment temperature is 850-950 DEG C, time 0.5-15h, and low tempering temperatures are 450-550 DEG C, soaking time 2-5h.
CN201811546474.0A 2018-12-18 2018-12-18 A kind of preparation method of Sintered NdFeB magnet Pending CN109627916A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811546474.0A CN109627916A (en) 2018-12-18 2018-12-18 A kind of preparation method of Sintered NdFeB magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811546474.0A CN109627916A (en) 2018-12-18 2018-12-18 A kind of preparation method of Sintered NdFeB magnet

Publications (1)

Publication Number Publication Date
CN109627916A true CN109627916A (en) 2019-04-16

Family

ID=66074884

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811546474.0A Pending CN109627916A (en) 2018-12-18 2018-12-18 A kind of preparation method of Sintered NdFeB magnet

Country Status (1)

Country Link
CN (1) CN109627916A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114990458A (en) * 2022-07-20 2022-09-02 中国科学院兰州化学物理研究所 Nickel plating method for iron-based metal part

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104464997A (en) * 2014-12-11 2015-03-25 张乔木 High-coercivity NdFeB permanent-magnet material and preparation method thereof
CN105225782A (en) * 2015-07-31 2016-01-06 浙江东阳东磁稀土有限公司 A kind of Sintered NdFeB magnet without heavy rare earth and preparation method thereof
CN108320902A (en) * 2018-01-19 2018-07-24 浙江鑫盛永磁科技有限公司 A kind of high comprehensive magnetic properties Sintered NdFeB magnet and preparation method thereof
CN108597708A (en) * 2018-04-12 2018-09-28 江苏柯普斯磁业有限公司 A kind of high performance sintered neodymium-iron-boron and manufacturing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104464997A (en) * 2014-12-11 2015-03-25 张乔木 High-coercivity NdFeB permanent-magnet material and preparation method thereof
CN106158213A (en) * 2014-12-11 2016-11-23 张乔木 A kind of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material and preparation method thereof
CN105225782A (en) * 2015-07-31 2016-01-06 浙江东阳东磁稀土有限公司 A kind of Sintered NdFeB magnet without heavy rare earth and preparation method thereof
CN108320902A (en) * 2018-01-19 2018-07-24 浙江鑫盛永磁科技有限公司 A kind of high comprehensive magnetic properties Sintered NdFeB magnet and preparation method thereof
CN108597708A (en) * 2018-04-12 2018-09-28 江苏柯普斯磁业有限公司 A kind of high performance sintered neodymium-iron-boron and manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114990458A (en) * 2022-07-20 2022-09-02 中国科学院兰州化学物理研究所 Nickel plating method for iron-based metal part

Similar Documents

Publication Publication Date Title
CN106409497A (en) Grain boundary diffusion method for neodymium-iron-boron magnet
CN105489334B (en) A kind of method that grain boundary decision obtains magnetic sintered NdFeB high
CN104934180B (en) A kind of preparation method of high saturation magnetic flux density high magnetic permeability soft-magnetic composite material
CN104031601A (en) Insulative adhesive for preparing metallic and soft magnetic composite material and using method thereof
CN104851545A (en) Production method of permanent magnet material with grain boundary diffusion layer
CN105895358A (en) Method for preparing NdFeB magnet through grain boundary diffusion permeation
CN104851544A (en) Production method for low-energy-consumption neodymium-iron-boron magnetic material
CN109609861A (en) A kind of preparation method of compound neodymium iron boron magnetic body
CN110400691A (en) A kind of preparation method improving neodymium iron boron magnetic body coercivity and heat-resisting quantity
CN103559972A (en) Preparation method for sintered Nd-Fe-B permanent-magnet material
CN104637667A (en) Oxidation-resisting flexible NdFeB pasting magnetic stripe and preparation method thereof
CN115430836A (en) Preparation method and device of high-abundance rare earth cerium-based anisotropic nanocrystalline magnet
CN103632835A (en) Rapid forming method of high-performance Nd-Fe-B magnetic body
CN109627916A (en) A kind of preparation method of Sintered NdFeB magnet
CN105869816A (en) Mischmetal-mixed neodymium iron boron hot-pressed and hot-deformed magnet and manufacturing method thereof
CN103632834B (en) A kind of preparation method of high-performance anisotropic Nd-Fe-B
CN102400034B (en) FeGa magnetostriction alloy wire and preparation method thereof
CN108039273B (en) Heat treatment method of magnetic steel with annular magnetic field
CN109651923A (en) A kind of surface treatment method of neodymium iron boron magnetic body
CN110355372A (en) A method of high silicon steel thin slice is prepared by powder rolling
CN104103415B (en) A kind of method hydrogenating dysprosium nanometer powder doping preparation anisotropy NdFeB rare-earth permanent magnet
CN105039831B (en) Preparation method for high-strength ternary magnetically soft alloy
CN105957674B (en) A kind of Nd-Ce-Pr-Fe-B alloy thin band permanent-magnet materials of high-coercive force and preparation method thereof
CN117059391A (en) Sintering method based on neodymium-iron-boron magnet
CN101824652B (en) Preparation method of alnico magnet

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190416

RJ01 Rejection of invention patent application after publication