CN109192427A - A kind of wear-resisting Nd-Fe-B permanent magnet material and preparation method for new-energy automobile - Google Patents
A kind of wear-resisting Nd-Fe-B permanent magnet material and preparation method for new-energy automobile Download PDFInfo
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- CN109192427A CN109192427A CN201811255173.2A CN201811255173A CN109192427A CN 109192427 A CN109192427 A CN 109192427A CN 201811255173 A CN201811255173 A CN 201811255173A CN 109192427 A CN109192427 A CN 109192427A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- 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
- H01F1/0572—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 with a protective layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/026—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 protecting methods against environmental influences, e.g. oxygen, by surface treatment
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Abstract
The invention belongs to the technical fields of permanent-magnet material preparation, and in particular to a kind of wear-resisting Nd-Fe-B permanent magnet material and preparation method for new-energy automobile.The present invention is by coating composite coating in the outer surface of neodymium-iron-boron magnetic material, and composite coating is polyurethane resin, the composite material of modifying epoxy resin by organosilicon, modified kaolin powder mixing is constituted.The composite coating can not only have very high corrosion resistance, heat resistance, and wear-resistant coating is prepared by Supersonic Plasma Spraying technology thereon again, obtained coating is fine and close, coating surface is uniform, the bond strength of coating and workpiece is good, with enough hardness, middle wearability requirement under use environment in new-energy automobile can be met.
Description
Technical field
The invention belongs to the technical fields of permanent-magnet material preparation, and in particular to a kind of wear-resisting neodymium iron for new-energy automobile
B permanent magnetic material and preparation method.
Background technique
Nd-Fe-B permanent magnet material is that aerospace equipment, marine engineering equipment, energy conservation and new-energy automobile, advanced track are handed over
The critical material in the fields such as logical equipment and electrical circuitry equipment.It is difficult to be replaced by other permanent-magnet materials in prediction future 10-15, change
Kind and regulation Nd-Fe-B permanent magnet material institutional framework, improving its magnetic property is still the direction that people are continually striving to.Neodymium iron boron
Permanent-magnet material application field growth rate it is most fast be for motor prepare.Core of the driving motor as new-energy automobile
Part, so that the high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material for driving motor has broad application prospects；Meanwhile driving motor
The raising of energy forces the performance improvement of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, to meet driving motor manufacturing enterprise to magnet performance
Requirement.
It is organic anti-that the special application number 201110411826.3 of Chinese invention discloses the enhancing of neodymium-iron-boron permanent magnetic material surface particle
The cathode electro-coating side of the preparation side of rotten coating, specifically neodymium-iron-boron permanent magnetic material surface particle enhancing organic anti-corrosive coating
Method.According to the present invention, neodymium-iron-boron permanent magnetic material surface is polished first, then through degreasing degreasing, acid pickling and rust removing, alramenting, yin
Pole electrophoretic painting and hot setting form the organic matter coating of particle enhancing in surface of Nd-Fe-B permanent magnet.It is prepared by the present invention
Coating is using epoxy resin, acrylic acid, polyurethane as base, is to increase with particles such as micro/nano level titanium oxide, aluminium oxide, graphite, aluminium
The compound organic coating of strong phase, coating is on the intrinsic magnetic property of magnet without influence, and magnet binding force is good, caking property with adhesive glue
By force, thickness is uniform, surface is smooth, corrosion resistance is strong, preparation cost is low.
Chinese invention patent application number 201510540218.0 discloses a kind of magnetic rubber mat and preparation method thereof that insulate, and belongs to
In the method field for being exclusively used in installation, maintenance cable or electric wire, to solve, existing insulation rubber mat is nonmagnetic, it is small to fix
The problem of component, magnetic insulation rubber mat of the present invention include at least upper layer and lower layer rubber mat, two layers of rubber mat is viscous by binder
Knot, at least one layer of rubber mat are magnetic rubber mat, and the magnetism rubber mat is by magnetic micro-powder and polyurathamc powder according to weight ratio 1:
2-4 is prepared.Magnetic insulating cement prepared by the present invention is lined with certain magnetism, uses in installation or repair apparatus needs
When rubber mat, the small tools such as the screw of irony can be adsorbed on rubber mat, especially aloft operation when, small tool can be prevented
It falls, makes to install and overhaul more convenient.
Chinese invention patent application number 201310574777.4 discloses a kind of system of corrosion resistance Sintered NdFeB permanent magnet
Method is made, Nd-Fe-B permanent magnet is prepared into rapid hardening thin slice including the use of vacuum induction rapid hardening slab furnace by the manufacturing method, will
Rapid hardening thin slice carry out hydrogen explosion it is broken and carry out Dehydroepiandrosterone derivative method using in airflow milling utilize high velocity inert gas air-flow will
The quick-fried broken powder of hydrogen is broken, and the micro mist that average particle size is 1-5 μm is made, and micro mist is orientated after die mould and obtains height through oversintering
Then performance Nd-Fe-B permanent magnet material will process product, manufacture the small dimension magnet at demand.Finally to permanent magnet into
Row sealing pores obtain a kind of corrosion proof Nd-Fe-B permanent magnet material.The manufacturing method of the present invention can effectively improve neodymium iron
The service life of Nd-Fe-B permanent magnet can be improved in the corrosion resisting property of boron permanent magnet.
Chinese invention patent application number 201611050617.X discloses a kind of raising Nd-Fe-B permanent magnet epoxy resin plating
The method of layer performance, comprising: Step 1: Nd-Fe-B permanent magnet is carried out Cathodic epoxies electrodeposition coated film, obtain being coated with ring
The Nd-Fe-B permanent magnet of oxygen resin film；Step 2: to the asphalt mixtures modified by epoxy resin for being painted on surface of Nd-Fe-B permanent magnet obtained in step 1
Adipose membrane carries out curing process, and makes 225 DEG C~235 DEG C of the cured temperature, and the cured time is 70 minutes~120
Minute.The present invention can be improved the high-temp resisting high-humidity resisting high-voltage performance of Nd-Fe-B permanent magnet epoxy resin coating, corrosion resistance with
And binding force, the curing process of epoxy resin film provided by the invention, product can be made to reach PCT experiment 264 hours or more
Good level.
Currently, improving neodymium iron boron corrosion resistance mainly to coat based on protective coating, such as electroplated Ni, plating Zn, shroud is applied
It oxygen resin and aluminizes.Wherein coating epoxy resin has more preferable corrosion resistance relative to other modes and epoxy resin applies
The advantages that layer has electrical insulating property, chemical stability good, and shrinking percentage is low, and easy processing forms and is low in cost.But epoxy resin
(EP) solidification post-crosslinking density is high, is in tridimensional network, and that there are internal stress is big, matter is crisp, fatigue durability, heat resistance and impact resistance
Property insufficient and peel strength, the disadvantages of cracking adaptability to changes is low and humidity resistance is poor, and surface can be high.Therefore, preparation
The epoxy coating on neodymium-iron-boron magnetic material surface there are brittleness big, poor impact resistance, the disadvantages of easily scuffing.
Summary of the invention
For coating there are brittleness big, impact resistance, heat resistance difference etc. of the neodymium-iron-boron magnetic material of existing automobile
Problem, the present invention propose a kind of wear-resisting Nd-Fe-B permanent magnet material and preparation method for new-energy automobile.
To solve the above problems, the invention adopts the following technical scheme:
Kaolin is ground and crosses 400~500 by a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile
Mesh, is toasted at a temperature of being then placed on 70 DEG C, the pure water of 0.73 times of its quality is then added, in 90 DEG C of temperature constant state
Then lower stirring 30 minutes is added tributyl phosphate, and cools down, be then stirred, re-dry is re-grind, and must be modified height
Ridge soil is spare, then is starting the cleaning processing after neodymium-iron-boron magnetic material is sintered, then neodymium-iron-boron magnetic material is set by treated
Cathodic electrocoat processing is carried out in electrophoresis tank, wherein the tank liquor of electrophoresis tank is polyurethane resin, silicon-modified epoxy tree
The colloidal solution of rouge, coloring agent and organic solvent configuration is constituted, evenly dispersed in colloidal solution to have modified kaolin powder.Cathode electricity
Taking out after swimming coating treatment can be obtained after carrying out cleaning and resin solidification processing again coats one layer on neodymium-iron-boron magnetic material
Then composite coating uses Hypersonic Plasma Spraying System and plasma gun again, spray one layer of nickel aluminium packet in coating surface
Whiting coating.Obtained composite material is used for the heat-resistant permant magnetic Nd-Fe-B material of new-energy automobile；Specifically includes the following steps:
S1, kaolin being ground into powder, toasted, pure water is added, then tributyl phosphate is added in stirring, cool to 60~
75 DEG C, it is stirred 2~3h, drying is re-grind, and obtains modified kaolin powder；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in progress cathodic electrocoat processing in electrophoresis tank；The electrophoresis tank
Tank liquor be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and step S1 prepare modified kaolin
The colloidal solution of powder configuration is constituted；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating；
S4, using Hypersonic Plasma Spraying System and plasma gun, in the neodymium iron for the coating composite coating that step S3 is obtained
Boron magnetic material surface sprays one layer of nickel aluminium cladding powder coating to get the wear-resisting Nd-Fe-B permanent magnetic material arrived for new-energy automobile
Material.
Neodymium-iron-boron magnetic material is neodymium, the alloy of iron oxide etc., also known as magnet steel.As the newest of rare earth permanent-magnetic material development
As a result, being referred to as " magnetic king " due to its excellent magnetic property.Neodymium iron boron has high magnetic energy product and strong power, while high-energy
The advantages of density, is applied widely Nd-Fe-B permanent magnet material in modern industry and electronic technology, to make instrument instrument
Miniaturization, lightweight, the slimming of the equipment such as table, electroacoustic motor, magnetic separation magnetization are possibly realized.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S1
The powder that kaolin described in step is ground into crosses 400~500 meshes.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S1
The temperature of baking described in step is 65~85 DEG C, and the time is 30~60min.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S1
Kaolin powder described in step, pure water, tributyl phosphate mass ratio be 5:10:1.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S1
The temperature of stirring described in step is 85~95 DEG C, and the time is 20~40min.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S2
Polyurethane resin described in step, modifying epoxy resin by organosilicon, coloring agent, organic solvent and modified kaolin powder mass ratio
For 5~15:4~10:2~6:10~30:5~10.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S2
The voltage of the processing of cathodic electrocoat described in step is 50~85V, and the time is 5~20min.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S3
Resin solidification described in step is epoxy resin.
Further, the preparation method of above-mentioned a kind of wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, wherein S4
The power of spraying described in step is 40~60KW, and powder feeding rate is 30~50gmin-1, main steam flow is 100~130L
min-1, spray distance is 50~100mm, and coating thickness is 5-10 μm.
The present invention also provides a kind of wear-resisting Nd-Fe-B permanent magnet materials for new-energy automobile, by Neodymium iron boron magnetic material
The outer surface of material coats composite coating, and composite coating is polyurethane resin, modifying epoxy resin by organosilicon, modified kaolin powder
Mixed composite material is constituted.The composite coating can not only have very high corrosion resistance, heat resistance, and pass through thereon again
Wear-resistant coating is prepared in Supersonic Plasma Spraying technology, and obtained coating is fine and close, and coating surface is uniform, coating and workpiece
Bond strength is good, has enough hardness, can meet middle wearability requirement under use environment in new-energy automobile.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
A kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, comprising the following steps:
S1, it kaolin is ground into powder crosses 450 meshes, baking temperature is 75 DEG C, time 45min, and pure water, stirring is added
Temperature is 90 DEG C, and then tributyl phosphate is added in time 30min, cool to 70 DEG C, is stirred 2.5h, and drying is ground again
Mill, obtains modified kaolin powder；The kaolin powder, pure water, tributyl phosphate mass ratio be 5:10:1；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in electrophoresis tank and carries out cathodic electrocoat processing, voltage 70V,
Time is 10min；The tank liquor of the electrophoresis tank be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and
The colloidal solution of the modified kaolin powder configuration of step S1 preparation is constituted；The polyurethane resin, silicon-modified epoxy tree
Rouge, coloring agent, organic solvent and modified kaolin powder mass ratio be 10:7:4:20:8；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating；The resin solidification is epoxy resin；
S4, using Hypersonic Plasma Spraying System and plasma gun, in the neodymium iron for the coating composite coating that step S3 is obtained
Boron magnetic material surface sprays one layer of nickel aluminium cladding powder coating to get the wear-resisting Nd-Fe-B permanent magnetic material arrived for new-energy automobile
Material；The power of the spraying is 50KW, powder feeding rate 40gmin-1, main steam flow 110Lmin-1, spray distance is
70mm;Coating thickness is 5 μm.
Embodiment 2
A kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, comprising the following steps:
S1, it kaolin is ground into powder crosses 420 meshes, baking temperature is 66 DEG C, time 30min, and pure water, stirring is added
Temperature is 85 DEG C, and then tributyl phosphate is added in time 20min, cool to 62 DEG C, is stirred 2h, and drying is ground again
Mill, obtains modified kaolin powder；The kaolin powder, pure water, tributyl phosphate mass ratio be 5:10:1；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in electrophoresis tank and carries out cathodic electrocoat processing, voltage 55V,
Time is 6min；The tank liquor of the electrophoresis tank be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and
The colloidal solution of the modified kaolin powder configuration of step S1 preparation is constituted；The polyurethane resin, silicon-modified epoxy tree
Rouge, coloring agent, organic solvent and modified kaolin powder mass ratio be 6:5:4:20:7；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating；The resin solidification is epoxy resin；
S4, using Hypersonic Plasma Spraying System and plasma gun, in the neodymium iron for the coating composite coating that step S3 is obtained
Boron magnetic material surface sprays one layer of nickel aluminium cladding powder coating to get the wear-resisting Nd-Fe-B permanent magnetic material arrived for new-energy automobile
Material；The power of the spraying is 45KW, powder feeding rate 35gmin-1, main steam flow 100Lmin-1, spray distance is
60mm;Coating thickness is 6 μm.
Embodiment 3
A kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, comprising the following steps:
S1, it kaolin is ground into powder crosses 500 meshes, baking temperature is 85 DEG C, time 50min, and pure water, stirring is added
Temperature is 90 DEG C, and then tributyl phosphate is added in time 35min, cool to 75 DEG C, is stirred 2.5h, and drying is ground again
Mill, obtains modified kaolin powder；The kaolin powder, pure water, tributyl phosphate mass ratio be 5:10:1；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in electrophoresis tank and carries out cathodic electrocoat processing, voltage 80V,
Time is 15min；The tank liquor of the electrophoresis tank be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and
The colloidal solution of the modified kaolin powder configuration of step S1 preparation is constituted；The polyurethane resin, silicon-modified epoxy tree
Rouge, coloring agent, organic solvent and modified kaolin powder mass ratio be 14:9:5:25:9；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating；The resin solidification is epoxy resin；
S4, using Hypersonic Plasma Spraying System and plasma gun, in the neodymium iron for the coating composite coating that step S3 is obtained
Boron magnetic material surface sprays one layer of nickel aluminium cladding powder coating to get the wear-resisting Nd-Fe-B permanent magnetic material arrived for new-energy automobile
Material；The power of the spraying is 55KW, powder feeding rate 50gmin-1, main steam flow 130Lmin-1, spray distance is
90mm, coating thickness are 7 μm.
Embodiment 4
A kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, comprising the following steps:
S1, it kaolin is ground into powder crosses 480 meshes, baking temperature is 82 DEG C, time 35min, and pure water, stirring is added
Temperature is 88 DEG C, and then tributyl phosphate is added in time 32min, cool to 71 DEG C, is stirred 2.5h, and drying is ground again
Mill, obtains modified kaolin powder；The kaolin powder, pure water, tributyl phosphate mass ratio be 5:10:1；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in electrophoresis tank and carries out cathodic electrocoat processing, voltage 81V,
Time is 14min；The tank liquor of the electrophoresis tank be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and
The colloidal solution of the modified kaolin powder configuration of step S1 preparation is constituted；The polyurethane resin, silicon-modified epoxy tree
Rouge, coloring agent, organic solvent and modified kaolin powder mass ratio be 12:8:5:23:8；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating；The resin solidification is epoxy resin；
S4, using Hypersonic Plasma Spraying System and plasma gun, in the neodymium iron for the coating composite coating that step S3 is obtained
Boron magnetic material surface sprays one layer of nickel aluminium cladding powder coating to get the wear-resisting Nd-Fe-B permanent magnetic material arrived for new-energy automobile
Material；The power of the spraying is 58KW, powder feeding rate 40gmin-1, main steam flow 120Lmin-1, spray distance is
80mm, coating thickness are 8 μm.
Embodiment 5
A kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, comprising the following steps:
S1, it kaolin is ground into powder crosses 460 meshes, baking temperature is 67 DEG C, time 47min, and pure water, stirring is added
Temperature is 88 DEG C, and then tributyl phosphate is added in time 30min, cool to 70 DEG C, is stirred 2h, and drying is ground again
Mill, obtains modified kaolin powder；The kaolin powder, pure water, tributyl phosphate mass ratio be 5:10:1；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in electrophoresis tank and carries out cathodic electrocoat processing, voltage 75V,
Time is 15min；The tank liquor of the electrophoresis tank be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and
The colloidal solution of the modified kaolin powder configuration of step S1 preparation is constituted；The polyurethane resin, silicon-modified epoxy tree
Rouge, coloring agent, organic solvent and modified kaolin powder mass ratio be 12:7:4:25:9；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating；The resin solidification is epoxy resin；
S4, using Hypersonic Plasma Spraying System and plasma gun, in the neodymium iron for the coating composite coating that step S3 is obtained
Boron magnetic material surface sprays one layer of nickel aluminium cladding powder coating to get the wear-resisting Nd-Fe-B permanent magnetic material arrived for new-energy automobile
Material；The power of the spraying is 52KW, powder feeding rate 45gmin-1, main steam flow 110Lmin-1, spray distance is
70mm, coating thickness are 10 μm.
Comparative example 1
A kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, comprising the following steps:
S1, it kaolin is ground into powder crosses 460 meshes, baking temperature is 67 DEG C, time 47min, and pure water, stirring is added
Temperature is 88 DEG C, and then tributyl phosphate is added in time 30min, cool to 70 DEG C, is stirred 2h, and drying is ground again
Mill, obtains modified kaolin powder；The kaolin powder, pure water, tributyl phosphate mass ratio be 5:10:1；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in electrophoresis tank and carries out cathodic electrocoat processing, voltage 75V,
Time is 15min；The tank liquor of the electrophoresis tank be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and
The colloidal solution of the modified kaolin powder configuration of step S1 preparation is constituted；The polyurethane resin, silicon-modified epoxy tree
Rouge, coloring agent, organic solvent and modified kaolin powder mass ratio be 12:7:4:25:9；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating.
Comparative example 2
A kind of preparation method of Nd-Fe-B permanent magnet material, comprising: by neodymium-iron-boron magnetic material sintering, clean to get to being used for neodymium
Iron B permanent magnetic material.
In order to carry out qualitative test analysis, embodiment 1-5, comparative example 1-2 are selected with a batch of Neodymium iron boron magnetic
Material, disclosed composition are as follows: neodymium 35%, boron 1.2%, praseodymium 1%, zirconium 2%, copper 3%, cobalt 1%, chromium 1%, surplus are iron.Using autoclave
It tests (5-10psig, 110 DEG C, 100h) and tests corrosion resistance, test result is shown in Table 1.
Table 1
Claims (10)
1. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile, which is characterized in that including following step
It is rapid:
S1, kaolin being ground into powder, toasted, pure water is added, then tributyl phosphate is added in stirring, cool to 60~
75 DEG C, it is stirred 2~3h, drying is re-grind, and obtains modified kaolin powder；
S2, neodymium-iron-boron magnetic material is sintered, cleaning, is placed in progress cathodic electrocoat processing in electrophoresis tank；The electrophoresis tank
Tank liquor be by polyurethane resin, modifying epoxy resin by organosilicon, coloring agent, organic solvent and step S1 prepare modified kaolin
The colloidal solution of powder configuration is constituted；
S3, step S2 electrophoretic coating treated neodymium-iron-boron magnetic material is taken out, cleaning, resin solidification obtain coating compound
The neodymium-iron-boron magnetic material of coating；
S4, using Hypersonic Plasma Spraying System and plasma gun, in the neodymium iron for the coating composite coating that step S3 is obtained
Boron magnetic material surface sprays one layer of nickel aluminium cladding powder coating to get the wear-resisting Nd-Fe-B permanent magnetic material arrived for new-energy automobile
Material.
2. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is that the powder that kaolin described in S1 step is ground into crosses 400~500 meshes.
3. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is that the temperature of baking described in S1 step is 65~85 DEG C, and the time is 30~60min.
4. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is, kaolin powder described in S1 step, pure water, tributyl phosphate mass ratio be 5:10:1.
5. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is that the temperature of stirring described in S1 step is 85~95 DEG C, and the time is 20~40min.
6. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is, polyurethane resin described in S2 step, modifying epoxy resin by organosilicon, coloring agent, organic solvent and modified kaolin powder
The mass ratio of body is 5~15:4~10:2~6:10~30:5~10.
7. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is that the voltage of the processing of cathodic electrocoat described in S2 step is 50~85V, and the time is 5~20min.
8. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is that resin solidification described in S3 step is epoxy resin.
9. a kind of preparation method of the wear-resisting Nd-Fe-B permanent magnet material for new-energy automobile according to claim 1, special
Sign is that the power of spraying described in S4 step is 40~60KW, and powder feeding rate is 30~50gmin-1, main steam flow 100
~130Lmin-1, spray distance is 50~100mm;Coating thickness is 5-10 μm.
10. a kind of wear-resisting neodymium for new-energy automobile that any one preparation method is prepared according to claim 1~9
Iron B permanent magnetic material.
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| CN201811255173.2A CN109192427A (en) | 2018-10-26 | 2018-10-26 | A kind of wear-resisting Nd-Fe-B permanent magnet material and preparation method for new-energy automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029073A (en) * | 2019-12-27 | 2020-04-17 | 成都银河磁体股份有限公司 | High-resistance magnetic powder, bonded magnet and preparation method thereof |
| CN113113530A (en) * | 2021-03-16 | 2021-07-13 | 西北工业大学 | Preparation method of porous alloy electrode with BASE film attached to surface |
-
2018
- 2018-10-26 CN CN201811255173.2A patent/CN109192427A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029073A (en) * | 2019-12-27 | 2020-04-17 | 成都银河磁体股份有限公司 | High-resistance magnetic powder, bonded magnet and preparation method thereof |
| CN113113530A (en) * | 2021-03-16 | 2021-07-13 | 西北工业大学 | Preparation method of porous alloy electrode with BASE film attached to surface |
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