CN109065315A - A kind of new energy vapour driving motor neodymium-iron-boron magnetic material and preparation method - Google Patents

A kind of new energy vapour driving motor neodymium-iron-boron magnetic material and preparation method Download PDF

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CN109065315A
CN109065315A CN201811274374.7A CN201811274374A CN109065315A CN 109065315 A CN109065315 A CN 109065315A CN 201811274374 A CN201811274374 A CN 201811274374A CN 109065315 A CN109065315 A CN 109065315A
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iron
magnet
neodymium
magnetic material
parts
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陈庆
司文彬
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Chengdu New Keli Chemical Science Co Ltd
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Chengdu New Keli Chemical Science Co Ltd
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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
    • H01F1/0575—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
    • 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
    • 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
    • H01F41/0293—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 diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets

Abstract

The present invention provides a kind of new energy vapour driving motor neodymium-iron-boron magnetic material and preparation methods.The ethanol solution of cellulose acetate is added after antiferromagnetic oxide is mixed with heavy rare earth dysprosium terbium alloy powder, pasty solutions are made, then coated on the Sintered NdFeB magnet surface after surface acid-washing deoxidation film, Laser Cladding Treatment is carried out again, it is finally heat-treated to get to new energy vapour driving motor neodymium-iron-boron magnetic material.This method passes through by the exchange bias effect between antiferromagnetic oxide and neodymium-iron-boron body interface, simultaneously using inside heavy rare earth element dysprosium terbium alloy grain boundary diffusion to magnet, it is acted synergistically by the two, under the premise of not reducing remanent magnetism, the coercivity of neodymium-iron-boron magnetic material is greatly improved, preparation method is simple simultaneously, can be widely used in automobile drive electric motor.

Description

A kind of new energy vapour driving motor neodymium-iron-boron magnetic material and preparation method
Technical field
The present invention relates to motor field of magnetic material, and in particular to the preparation of Nd-Fe-B permanent magnet material, more particularly to one Kind new energy vapour driving motor neodymium-iron-boron 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 is 10 ~ 15 years following, it should 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.
For permanent-magnet material, coercivity directly affects the magnetic energy product of material.And the coercivity and anisotropy of material Can be closely related, it can be by Fe3+Substitution adjust coercivity.And substitute ferritic property and substitutional ion type and Occupancy in lattice is closely related, and is associated with preparation method.Due to Fe3+Five kinds of different secondary lattices are occupied, Each time lattice has special contribution to magnetic moment and anisotropy, with other ion substitutions Fe3+Magnetic property can be had an impact. To coercivity reduction, then substitutional ion should occupy 4f2 or 2b.It is rectified in addition, it can be improved in the anisotropy for increasing material Stupid power, including magnetocrystalline anisotropy, shape anisotropy etc..Therefore, it develops a kind of preparation process and simply improves neodymium iron boron coercive The preparation method of power has very important application value.
Chinese invention patent application number 201510851324.0 disclose a kind of high-coercive force neodymium-iron-boron magnetic material and Preparation method is made of raw material from the following weight: 18 ~ 28 parts of dysprosium neodymium, 18 ~ 28 parts of niobium ferro-boron, and 5 ~ 10 parts of neodymium iron boron, oxidation 1 ~ 3 part of aluminium, 10 ~ 15 parts of di-iron trioxide, 3 ~ 5 parts of nanoscale quadrangle zinc oxide, 12 ~ 14 parts of neodymia, 5 ~ 8 parts of carbon black, coupling 2 ~ 5 parts of agent, 2 ~ 5 parts of graphite powder, 40 ~ 45 parts of epoxy resin, 18 ~ 28 parts of butyl rubber, 10 ~ 15 parts of methyl acrylate.
Chinese invention patent application number 201710130288.8 discloses a kind of grain boundary decision and prepares high-coercive force neodymium iron boron The method of magnet.Low-melting-point metal is Ga, Zn, one of Sn, and low-melting alloy composition group becomes R-M, R La, Ce, Pr, One of Nd, Gd, Tb, Dy, Ho, Y or more, M Cu, Al, Ga, Zn, Sn, one of Ag or more.Processing step are as follows: Cleaning treatment first is carried out to neodymium iron boron magnetic body surface, magnet is then subjected to vacuum preheating, then put it into the gold of vacuum fusion Hot-dip is carried out in category or alloy molten solution and realizes surface cladding, and the neodymium iron boron magnetic body Jing Guo hot-dip is finally diffused hot place Reason and subsequent anneal processing improve border structure and the Grain-Boundary Phase distribution of magnet, high-coercive force neodymium-iron-boron required for obtaining Body.
Chinese invention patent application number 201710598036.8 discloses a kind of neodymium iron boron magnetic body coercivity improvement method, first First neodymium iron boron magnetic body thin slice is placed into argon gas protecting bin, by dysprosium, terbium or dysprosium terbium alloy powder are uniformly sprinkling upon neodymium iron boron The surface of magnet, and by the way of quickly heating, the film forming so that powder on neodymium iron boron magnetic body surface is heating and curing rapidly, later Magnet is sent into vacuum drying oven and is heat-treated, makes inside heavy rare earth element grain boundary diffusion to magnet, is not reducing remanent magnetism Under the premise of, significantly improve magnet coercivity.
Chinese invention patent application number 201610790799.8 discloses a kind of high anti-corrosion, high-coercive force sintered NdFeB magnetic Body and preparation method thereof prepares the hydrogenation of nickel base/nano heavy rare earth on Sintered NdFeB magnet surface by the method for laser melting coating Object composite coating.
According to above-mentioned, it is used for the neodymium-iron-boron magnetic material of electric motor of automobile in existing scheme, there is a problem of coercivity difference, And use to site occupancy or the anisotropic method of reinforcing material, have the defects that preparation process is complicated, effect is undesirable.
Summary of the invention
For the neodymium-iron-boron magnetic material of the wider electric motor of automobile of current application, that there are coercivitys is poor, preparation process is multiple The defects of miscellaneous, the present invention propose a kind of new energy vapour driving motor neodymium-iron-boron magnetic material and preparation method, thus effectively real Show under the premise of not reducing remanent magnetism, has significantly improved the coercitive effect of magnet, and technical process is simple, it is easy to spread to answer With.
Specific technical solution of the present invention is as follows:
A kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material, comprising the following steps:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material.
The present invention is by relying on antiferromagnetic oxide Co3O4Exchange bias effect between neodymium-iron-boron body interface, realizes Ion substitution to effectively adjust the coercivity of neodymium iron boron magnetic body, while utilizing heavy rare earth element dysprosium terbium alloy grain boundary diffusion To magnet, under the premise of not reducing remanent magnetism, magnet coercivity is significantly improved, the two synergistic effect is greatly improved The coercivity of neodymium-iron-boron magnetic material.
Preferably, step (1) antiferromagnetic oxide is Co3O4。
Preferably, in step (1) the heavy rare earth dysprosium terbium alloy powder, 60 ~ 70 parts by weight of dysprosium, 30 ~ 40 parts by weight of terbium.
Preferably, in step (1), 25 ~ 28 parts by weight of antiferromagnetic oxide, 30 ~ 33 weight of heavy rare earth dysprosium terbium alloy powder Part, 8 ~ 12 parts by weight of cellulose acetate, 27 ~ 37 parts by weight of ethyl alcohol.
Preferably, in step (2) described Sintered NdFeB magnet, 33 ~ 38 parts by weight of neodymium, 57 ~ 65 parts by weight of iron, boron 2 ~ 5 Parts by weight.
Preferably, step (2) described pickling use mass concentration for 5 ~ 10% nitric acid solution, at room temperature impregnate 30 ~ 40s。
Preferably, the temperature of step (3) described drying is 160 ~ 180 DEG C, and the time is 50 ~ 60min.
Preferably, in step (4) described Laser Cladding Treatment, protective gas is argon gas, and laser power is 1.6 ~ 1.8kW, Scanning speed is 400 ~ 500mm/s, and spot diameter is 5 ~ 6mm, and defocusing amount is 20 ~ 30mm, and focal length is 180 ~ 190cm, and the time is 15~20s。
Preferably, the temperature of step (5) described heat treatment is 640 ~ 660 DEG C, and the time is 2 ~ 3h.
The present invention also provides a kind of new energy vapour driving motor Neodymium iron boron magnetic materials that above-mentioned preparation method is prepared Material.After antiferromagnetic oxide and heavy rare earth dysprosium terbium alloy powder are sufficiently mixed by mechanical stirring, cellulose acetate is added It is spare to be mixed and made into pasty solutions for ethanol solution；Then the oxidation film formed to Sintered NdFeB magnet removal magnet surface, will The magnet surface of the pasty solutions even application of preparation after treatment, places into drying box and is dried, make magnet surface system Standby one layer of preset cladding material coating；Then the magnet that surface coats preset cladding material coating is subjected to Laser Cladding Treatment, Laser cladding layer is prepared, finally there is the magnet of laser cladding layer to be heat-treated the surface of preparation, obtain product.
The present invention provides a kind of new energy vapour driving motor neodymium-iron-boron magnetic material and preparation methods, with the prior art It compares, the feature and excellent effect protruded is:
1, it proposes to prepare new energy vapour driving motor neodymium-iron-boron using antiferromagnetic oxide and the modified magnet of heavy rare earth element The method of property material.
2, by can effectively reconcile neodymium iron by the exchange bias effect between antiferromagnetic oxide and neodymium-iron-boron body interface The coercivity of boron magnet, while using inside heavy rare earth element dysprosium terbium alloy grain boundary diffusion to magnet, it is cooperateed with and is made by the two With the coercivity of neodymium-iron-boron magnetic material is greatly improved under the premise of not reducing remanent magnetism.
3, preparation method of the invention is simple, and production cost is low, can be widely used for in automobile drive electric motor.
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
Preparation process are as follows:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；Antiferromagnetic oxide is Co3O4；In heavy rare earth dysprosium terbium alloy powder, 66 parts by weight of dysprosium, 34 parts by weight of terbium；Wherein, 27 parts by weight of antiferromagnetic oxide, 31 parts by weight of heavy rare earth dysprosium terbium alloy powder, vinegar 11 parts by weight of acid cellulose, 31 parts by weight of ethyl alcohol；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；Pickling uses mass concentration for 7% nitric acid solution, impregnates 36s at room temperature；In Sintered NdFeB magnet, 35 weight of neodymium Measure part, 562 amount part of iron, 3 parts by weight of boron；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；Dry temperature is 168 DEG C, the time For 56min；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；In Laser Cladding Treatment, protective gas is argon gas, laser power 1.7kW, and scanning speed is 460mm/s, spot diameter 5mm, defocusing amount 26mm, focal length 184cm, time 17s；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material；The temperature of heat treatment is 648 DEG C, time 2.5h.
Test method are as follows:
Neodymium-iron-boron magnetic material made from Example 1 is measured using NIM-2000 type permanent-magnet material magnetic property measuring system and is tried Sample magnetic property obtains the remanent magnetism and coercivity of magnetic material according to the demagnetizing curve of gained magnet.
Remanent magnetism, the coercivity of the neodymium-iron-boron magnetic material of the embodiment 1 measured by the above method are as shown in table 1.
Embodiment 2
Preparation process are as follows:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；Antiferromagnetic oxide is Co3O4；In heavy rare earth dysprosium terbium alloy powder, 60 parts by weight of dysprosium, 40 parts by weight of terbium；Wherein, 25 parts by weight of antiferromagnetic oxide, 30 parts by weight of heavy rare earth dysprosium terbium alloy powder, vinegar 8 parts by weight of acid cellulose, 37 parts by weight of ethyl alcohol；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；Pickling uses mass concentration for 5% nitric acid solution, impregnates 30s at room temperature；In Sintered NdFeB magnet, 33 weight of neodymium Measure part, 65 parts by weight of iron, 2 parts by weight of boron；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；Dry temperature is 160 DEG C, the time For 60min；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；In Laser Cladding Treatment, protective gas is argon gas, laser power 1.6kW, and scanning speed is 400mm/s, spot diameter 6mm, defocusing amount 20mm, focal length 180cm, time 20s；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material；The temperature of heat treatment is 640 DEG C, time 3h.
Test method are as follows:
Neodymium-iron-boron magnetic material made from Example 2 is measured using NIM-2000 type permanent-magnet material magnetic property measuring system and is tried Sample magnetic property obtains the remanent magnetism and coercivity of magnetic material according to the demagnetizing curve of gained magnet.
Remanent magnetism, the coercivity of the neodymium-iron-boron magnetic material of the embodiment 2 measured by the above method are as shown in table 1.
Embodiment 3
Preparation process are as follows:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；Antiferromagnetic oxide is Co3O4；In heavy rare earth dysprosium terbium alloy powder, 62 parts by weight of dysprosium, 38 parts by weight of terbium；Wherein, 26 parts by weight of antiferromagnetic oxide, 31 parts by weight of heavy rare earth dysprosium terbium alloy powder, vinegar 9 parts by weight of acid cellulose, 34 parts by weight of ethyl alcohol；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；Pickling uses mass concentration for 6% nitric acid solution, impregnates 32s at room temperature；In Sintered NdFeB magnet, 35 weight of neodymium Measure part, 62 parts by weight of iron, 3 parts by weight of boron；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；Dry temperature is 165 DEG C, the time For 58min；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；In Laser Cladding Treatment, protective gas is argon gas, laser power 1.6kW, and scanning speed is 420mm/s, spot diameter 5mm, defocusing amount 22mm, focal length 183cm, time 18s；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material；The temperature of heat treatment is 645 DEG C, time 3h.
Test method are as follows:
Neodymium-iron-boron magnetic material made from Example 3 is measured using NIM-2000 type permanent-magnet material magnetic property measuring system and is tried Sample magnetic property obtains the remanent magnetism and coercivity of magnetic material according to the demagnetizing curve of gained magnet.
Remanent magnetism, the coercivity of the neodymium-iron-boron magnetic material of the embodiment 3 measured by the above method are as shown in table 1.
Embodiment 4
Preparation process are as follows:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；Antiferromagnetic oxide is Co3O4；In heavy rare earth dysprosium terbium alloy powder, 70 parts by weight of dysprosium, 30 parts by weight of terbium；Wherein, 28 parts by weight of antiferromagnetic oxide, 33 parts by weight of heavy rare earth dysprosium terbium alloy powder, vinegar 12 parts by weight of acid cellulose, 27 parts by weight of ethyl alcohol；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；Pickling uses mass concentration for 10% nitric acid solution, impregnates 40s at room temperature；In Sintered NdFeB magnet, neodymium 38 Parts by weight, 57 parts by weight of iron, 5 parts by weight of boron；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；Dry temperature is 180 DEG C, the time For 50min；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；In Laser Cladding Treatment, protective gas is argon gas, laser power 1.8kW, and scanning speed is 500mm/s, spot diameter 6mm, defocusing amount 30mm, focal length 190cm, time 15s；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material；The temperature of heat treatment is 660 DEG C, time 2h.
Test method are as follows:
Neodymium-iron-boron magnetic material made from Example 4 is measured using NIM-2000 type permanent-magnet material magnetic property measuring system and is tried Sample magnetic property obtains the remanent magnetism and coercivity of magnetic material according to the demagnetizing curve of gained magnet.
Remanent magnetism, the coercivity of the neodymium-iron-boron magnetic material of the embodiment 4 measured by the above method are as shown in table 1.
Embodiment 5
Preparation process are as follows:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；Antiferromagnetic oxide is Co3O4；In heavy rare earth dysprosium terbium alloy powder, 67 parts by weight of dysprosium, 33 parts by weight of terbium；Wherein, 27 parts by weight of antiferromagnetic oxide, 32 parts by weight of heavy rare earth dysprosium terbium alloy powder, vinegar 11 parts by weight of acid cellulose, 30 parts by weight of ethyl alcohol；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；Pickling uses mass concentration for 9% nitric acid solution, impregnates 38s at room temperature；In Sintered NdFeB magnet, 36 weight of neodymium Measure part, 60 parts by weight of iron, 4 parts by weight of boron；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；Dry temperature is 175 DEG C, the time For 52min；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；In Laser Cladding Treatment, protective gas is argon gas, laser power 1.8kW, and scanning speed is 480mm/s, spot diameter 5mm, defocusing amount 28mm, focal length 188cm, time 16s；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material；The temperature of heat treatment is 655 DEG C, time 2h.
Test method are as follows:
Neodymium-iron-boron magnetic material made from Example 5 is measured using NIM-2000 type permanent-magnet material magnetic property measuring system and is tried Sample magnetic property obtains the remanent magnetism and coercivity of magnetic material according to the demagnetizing curve of gained magnet.
Remanent magnetism, the coercivity of the neodymium-iron-boron magnetic material of the embodiment 5 measured by the above method are as shown in table 1.
Embodiment 6
Preparation process are as follows:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；Antiferromagnetic oxide is Co3O4；In heavy rare earth dysprosium terbium alloy powder, 65 parts by weight of dysprosium, 35 parts by weight of terbium；Wherein, 26 parts by weight of antiferromagnetic oxide, 32 parts by weight of heavy rare earth dysprosium terbium alloy powder, vinegar 10 parts by weight of acid cellulose, 32 parts by weight of ethyl alcohol；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；Pickling uses mass concentration for 8% nitric acid solution, impregnates 35s at room temperature；In Sintered NdFeB magnet, 36 weight of neodymium Measure part, 60 parts by weight of iron, 4 parts by weight of boron；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；Dry temperature is 170 DEG C, the time For 55min；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；In Laser Cladding Treatment, protective gas is argon gas, laser power 1.7kW, and scanning speed is 450mm/s, spot diameter 6mm, defocusing amount 25mm, focal length 185cm, time 18s；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material；The temperature of heat treatment is 650 DEG C, time 2.5h.
Test method are as follows:
Neodymium-iron-boron magnetic material made from Example 6 is measured using NIM-2000 type permanent-magnet material magnetic property measuring system and is tried Sample magnetic property obtains the remanent magnetism and coercivity of magnetic material according to the demagnetizing curve of gained magnet.
Remanent magnetism, the coercivity of the neodymium-iron-boron magnetic material of the embodiment 6 measured by the above method are as shown in table 1.
Comparative example 1
Preparation process are as follows:
(1) antiferromagnetic oxide is added to the ethanol solution of cellulose acetate, is stirred, pasty solutions is made；Antiferromagnetic oxygen Compound is Co3O4；Wherein, 42 parts by weight of antiferromagnetic oxide, 10 parts by weight of cellulose acetate, 48 parts by weight of ethyl alcohol；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；Pickling uses mass concentration for 8% nitric acid solution, impregnates 35s at room temperature；In Sintered NdFeB magnet, 36 weight of neodymium Measure part, 60 parts by weight of iron, 4 parts by weight of boron；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；Dry temperature is 170 DEG C, the time For 55min；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；In Laser Cladding Treatment, protective gas is argon gas, laser power 1.7kW, and scanning speed is 450mm/s, spot diameter 6mm, defocusing amount 25mm, focal length 185cm, time 18s；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material；The temperature of heat treatment is 650 DEG C, time 2.5h.
Test method are as follows:
Neodymium-iron-boron magnetic material made from comparative example 1 is taken, is measured and is tried using NIM-2000 type permanent-magnet material magnetic property measuring system Sample magnetic property obtains the remanent magnetism and coercivity of magnetic material according to the demagnetizing curve of gained magnet.
Remanent magnetism, the coercivity of the neodymium-iron-boron magnetic material of the comparative example 1 measured by the above method are as shown in table 1.
Table 1:

Claims (10)

1. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material, which comprises the following steps:
(1) antiferromagnetic oxide is sufficiently mixed with heavy rare earth dysprosium terbium alloy powder by mechanical stirring, is subsequently added into acetic acid fibre The ethanol solution for tieing up element, is stirred, pasty solutions is made；
(2) Sintered NdFeB magnet is subjected to pickling, pretreated sintering neodymium iron is made in the oxidation film that removal magnet surface is formed Boron magnet；
(3) it by the pretreated magnet surface made from step (2) of pasty solutions even application made from step (1), then puts Enter in drying box and be dried, obtained surface coats the magnet of preset cladding material coating；
(4) magnet that surface made from step (3) coats preset cladding material coating is subjected to Laser Cladding Treatment, surface is made Magnet with laser cladding layer；
(5) there is the magnet of laser cladding layer to be heat-treated surface made from step (4), collects to get new energy vapour is arrived Driving motor neodymium-iron-boron magnetic material.
2. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature Be: step (1) antiferromagnetic oxide is Co3O4。
3. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature It is: in step (1) the heavy rare earth dysprosium terbium alloy powder, 60 ~ 70 parts by weight of dysprosium, 30 ~ 40 parts by weight of terbium.
4. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature It is: in step (1), 25 ~ 28 parts by weight of antiferromagnetic oxide, 30 ~ 33 parts by weight of heavy rare earth dysprosium terbium alloy powder, acetate fiber Plain 8 ~ 12 parts by weight, 27 ~ 37 parts by weight of ethyl alcohol.
5. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature It is: in step (2) described Sintered NdFeB magnet, 33 ~ 38 parts by weight of neodymium, 57 ~ 65 parts by weight of iron, 2 ~ 5 parts by weight of boron.
6. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature Be: step (2) described pickling uses mass concentration for 5 ~ 10% nitric acid solution, impregnates 30 ~ 40s at room temperature.
7. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature Be: the temperature of step (3) described drying is 160 ~ 180 DEG C, and the time is 50 ~ 60min.
8. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature Be: in step (4) described Laser Cladding Treatment, protective gas is argon gas, and laser power is 1.6 ~ 1.8kW, and scanning speed is 400 ~ 500mm/s, spot diameter are 5 ~ 6mm, and defocusing amount is 20 ~ 30mm, and focal length is 180 ~ 190cm, and the time is 15 ~ 20s.
9. a kind of preparation method of new energy vapour driving motor neodymium-iron-boron magnetic material according to claim 1, feature Be: the temperature of step (5) described heat treatment is 640 ~ 660 DEG C, and the time is 2 ~ 3h.
10. a kind of new energy vapour driving motor neodymium-iron-boron that any one of claim 1 ~ 9 preparation method is prepared Property material.
CN201811274374.7A 2018-10-30 2018-10-30 A kind of new energy vapour driving motor neodymium-iron-boron magnetic material and preparation method Withdrawn CN109065315A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112725855A (en) * 2020-12-28 2021-04-30 安徽大地熊新材料股份有限公司 Preparation method of high-bonding-force high-corrosion-resistance coating on surface of neodymium iron boron magnet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112725855A (en) * 2020-12-28 2021-04-30 安徽大地熊新材料股份有限公司 Preparation method of high-bonding-force high-corrosion-resistance coating on surface of neodymium iron boron magnet
CN112725855B (en) * 2020-12-28 2022-05-10 安徽大地熊新材料股份有限公司 Preparation method of high-bonding-force high-corrosion-resistance coating on surface of neodymium iron boron magnet

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Application publication date: 20181221