CN109651923A - A kind of surface treatment method of neodymium iron boron magnetic body - Google Patents

A kind of surface treatment method of neodymium iron boron magnetic body Download PDF

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Publication number
CN109651923A
CN109651923A CN201811546487.8A CN201811546487A CN109651923A CN 109651923 A CN109651923 A CN 109651923A CN 201811546487 A CN201811546487 A CN 201811546487A CN 109651923 A CN109651923 A CN 109651923A
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Prior art keywords
iron boron
magnetic body
neodymium iron
boron magnetic
parts
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CN201811546487.8A
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Chinese (zh)
Inventor
徐嘉诚
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Zhejiang Zhong Hang Mstar Technology Ltd
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Zhejiang Zhong Hang Mstar Technology Ltd
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Priority to CN201811546487.8A priority Critical patent/CN109651923A/en
Publication of CN109651923A publication Critical patent/CN109651923A/en
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    • 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
    • B05D3/02—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 by baking
    • B05D3/0254—After-treatment
    • 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
    • B05D7/14—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 to metal, e.g. car bodies
    • 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
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

A kind of surface treatment method of neodymium iron boron magnetic body provided by the invention pre-processes neodymium iron boron magnetic body surface frosted, one layer of metallic element of the surface even application of pretreated neodymium iron boron magnetic body, modifying agent and plasticizer is then homogenized slurry.A kind of surface treatment method of neodymium iron boron magnetic body provided by the invention enables by being pre-processed in magnet surface and homogenizes 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 surface treatment method of neodymium iron boron magnetic body
Technical field
The present invention relates to neodymium iron boron field, in particular to a kind of surface treatment method of neodymium iron boron magnetic body.
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.
By being sprayed in magnet surface, coating heavy rare earth powder or heavy rare earth compound powder and pure water, alcohol or gasoline The suspension of composition, suspension are attached to magnet surface and form coating, be then heat-treated magnet to regulate and control magnet surface layer Ingredient and institutional framework at crystal grain main phase and Grain-Boundary Phase transitional region improve the comprehensive magnetic energy of magnet.
It is insufficient by coat powder adhesive force and magnet surface roughness is influenced but in the above method, especially when When coating layer thickness is more than 20 microns, turn-over, coating easily fall off from magnet surface slabbing, lead again after the completion of magnet single face spraying applies Cause magnet surface coating coated weight uneven, production operation is difficult to control, and after heat treatment, the consistency of magnet magnetic property is deteriorated, nothing Method plays the effect that grain boundary decision technology improves magnet comprehensive magnetic energy.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of surface treatment method of neodymium iron boron magnetic body.
To achieve the goals above, the surface treatment method of a kind of neodymium iron boron magnetic body provided by the invention, including following step It is rapid:
Step 1: 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；
2-5min is kept the temperature at 40-100 DEG C Step 2: 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.
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.
The plasticizer is the mixing of one or both of tributyl citrate, monoalkoxytitanates.
A kind of surface treatment method of neodymium iron boron magnetic body provided by the invention, by being pre-processed in 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 surface treatment method of neodymium iron boron magnetic body provided in this embodiment, comprising the following steps:
Step 1: 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；
2-5min is kept the temperature at 40-100 DEG C Step 2: 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.
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.
The plasticizer is the mixing of one or both of tributyl citrate, monoalkoxytitanates.
Embodiment 2
The surface treatment method of a kind of neodymium iron boron magnetic body 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 3
A kind of surface treatment method of neodymium iron boron magnetic body 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 (3)

1. a kind of surface treatment method of neodymium iron boron magnetic body, which comprises the following steps:
Step 1: 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；
2-5min is kept the temperature at 40-100 DEG C Step 2: 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 surface treatment method of neodymium iron boron magnetic body 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.
3. a kind of surface treatment method of neodymium iron boron magnetic body according to claim 1 or 2, which is characterized in that the plasticising Agent is the mixing of one or both of tributyl citrate, monoalkoxytitanates.
CN201811546487.8A 2018-12-18 2018-12-18 A kind of surface treatment method of neodymium iron boron magnetic body Pending CN109651923A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110415960A (en) * 2019-07-19 2019-11-05 浙江东阳东磁稀土有限公司 A method of improving Sintered NdFeB magnet magnetic property
CN117143497A (en) * 2023-07-28 2023-12-01 浙江大学 Preparation method of high-corrosion-resistance wear-resistance neodymium-iron-boron magnet anticorrosive paint

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110415960A (en) * 2019-07-19 2019-11-05 浙江东阳东磁稀土有限公司 A method of improving Sintered NdFeB magnet magnetic property
CN110415960B (en) * 2019-07-19 2021-06-18 浙江东阳东磁稀土有限公司 Method for improving magnetic property of sintered neodymium-iron-boron magnet
CN117143497A (en) * 2023-07-28 2023-12-01 浙江大学 Preparation method of high-corrosion-resistance wear-resistance neodymium-iron-boron magnet anticorrosive paint

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Application publication date: 20190419