CN106205929A - A kind of ferrum nickel metal magnetic powder core preparation method - Google Patents
A kind of ferrum nickel metal magnetic powder core preparation method Download PDFInfo
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- CN106205929A CN106205929A CN201610693252.6A CN201610693252A CN106205929A CN 106205929 A CN106205929 A CN 106205929A CN 201610693252 A CN201610693252 A CN 201610693252A CN 106205929 A CN106205929 A CN 106205929A
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- magnetic powder
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- nickel metal
- ball
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- 239000006247 magnetic powder Substances 0.000 title claims abstract description 111
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 48
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000000498 ball milling Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000000137 annealing Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000005253 cladding Methods 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000003973 paint Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 11
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims abstract description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 16
- 239000005995 Aluminium silicate Substances 0.000 claims description 15
- 235000012211 aluminium silicate Nutrition 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 10
- 239000004111 Potassium silicate Substances 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 0.000 claims description 8
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 8
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 5
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 claims description 5
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical group [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- HGPXWXLYXNVULB-UHFFFAOYSA-M lithium stearate Chemical compound [Li+].CCCCCCCCCCCCCCCCCC([O-])=O HGPXWXLYXNVULB-UHFFFAOYSA-M 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 229910052622 kaolinite Inorganic materials 0.000 claims 1
- 239000011162 core material Substances 0.000 description 35
- 230000007547 defect Effects 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000019794 sodium silicate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—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 soft-magnetic materials
- H01F1/14—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 soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14708—Fe-Ni based alloys
- H01F1/14733—Fe-Ni based alloys in the form of particles
- H01F1/14741—Fe-Ni based alloys in the form of particles pressed, sintered or bonded together
- H01F1/1475—Fe-Ni based alloys in the form of particles pressed, sintered or bonded together the particles being insulated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention discloses a kind of ferrum nickel metal magnetic powder core preparation method, comprise the following steps: (1) melting powder process；(2) combinations of particle sizes；(3) magnetic powder ball milling；(4) heat treatment；(5) chemistry cladding；(6) oxidation filming；(7) secondary insulating cladding；(8) compressing；(9) magnetic core annealing；(10) spray paint.Present invention process step is simple, easily implements, workable, and the ferrum nickel powder core prepared has higher pcrmeability.
Description
Technical field
The present invention relates to metal soft magnetic material technical field, especially relate to a kind of ferrum nickel metal magnetic powder core preparation method.
Background technology
Metal magnetic powder core, as a kind of novel soft magnetic materials, is widely used in inducer, reactor and transformator
In the middle of, as the series products that electronic material is indispensable.Along with electronic equipment is to high frequency and miniaturization, to metallic magnetic
The requirement of powder core is also more and more higher, and metal magnetic powder core is the same with soft magnetic products, is also towards lower loss, higher saturated
Magnetic induction direction is developed.Wherein ferrum nickel metal magnetic powder core has high Bs, and high DC-bias ability is widely used in various electricity
In the middle of sub-device, this product is monopolized by Korea S CSC for a long time.
The domestic patent preparing ferrum nickel metal magnetic powder core is more, its Patent CN201110133772.9 mover iron nickel magnetic
The method that powder uses phosphoric acid to process obtains the ferrum nickel powder core material that pcrmeability is 125, and its principle is magnetic powder Surface Creation one
Plant phosphate layer and increase sheet resistance, thus improve the overall electrical resistance of magnetic core, reduce loss, improve high frequency performance.But it is this
There is shortcoming in method, such as magnetic powder molding at elevated pressures, its dielectric film is easy to fragmentation, causes decreasing insulating；Its magnetic powder
Dielectric film typically just thermally decomposes more than 600 DEG C, makes decreasing insulating, and high frequency performance reduces, and loss raises, and prepares
High permeability magnetic core have to high pressure molding, and fully eliminate stress more than the heat treatment of 600 DEG C and improve pcrmeability, because of
This this kind of method cannot prepare the ferrum nickel powder core of more high magnetic permeability higher performance.
Summary of the invention
The present invention is the problem low in order to solve the ferrum nickel powder core pcrmeability of prior art, it is provided that a kind of processing step
Simply, easily implementing, workable ferrum nickel preparation process for magnetic powder core, prepared ferrum nickel powder core has higher pcrmeability.
To achieve these goals, the present invention is by the following technical solutions:
A kind of ferrum nickel metal magnetic powder core preparation method of the present invention, comprises the following steps:
(1) melting powder process: weigh nickel ingot and the ingot iron of 45～58 weight portions of 42～55 weight portions, be placed in intermediate frequency furnace
In carry out melting, after removing scum silica frost, use nitrogen to carry out powder by atomization.
(2) combinations of particle sizes: after being sieved by granularity by the magnetic powder obtained, carries out combinations of particle sizes by different grain size proportioning.
(3) magnetic powder ball milling: magnetic powder combination obtained mixes with ball-milling medium to be placed in ball grinder and carries out ball milling.Magnetic powder
After mixing and ball milling medium carries out ball-milling treatment, introduce defect inside ferrum nickel magnetic powder, such as stress, sliding, impurity etc., these defects
Magnetic powder internal grain can be promoted after high-temperature heat treatment to grow up, advantageously reduce coercivity, improve pcrmeability.
(4) heat treatment: by the magnetic powder after ball milling at N2Or H2Carrying out heat treatment under atmosphere, treatment temperature is 600～900 DEG C,
The process time 3～5h.
(5) chemistry cladding: the magnetic powder after heat treatment is added in treatment fluid after mix and blend 1～30min, dry.
(6) oxidation filming: the magnetic powder after being coated with by chemistry is as N2In carry out heat treatment, treatment temperature 650～850 DEG C,
The process time 30～120min.Chemical films previous in this step is decomposed, and magnetic powder Surface Creation metal oxide film, this layer aoxidizes
Film strengthens with the adhesion of metal magnetic, and lower thickness is conducive to preparing high permeability magnetic core, can improve magnetic powder with exhausted simultaneously
The bond strength of velum, it is ensured that do not rupture under dielectric film high-pressure molding, the high-temperature heat treatment of the most resistance to more than 650 DEG C, thus have
It is beneficial to improve magnetic powder high frequency performance.
(7) secondary insulating cladding: add mix homogeneously after covering in the magnetic powder after film forming, dry.
(8) compressing: to be pressed after the magnetic powder after secondary insulating is coated with adds lubricant, obtain blank magnetic
Core.
(9) magnetic core annealing: being placed in annealing furnace by blank magnetic core and anneal, annealing temperature is 600～800 DEG C, annealing
Time is 30～200min.
(10) spray paint: blank magnetic core after annealing solidifies after spraying paint, and obtains magnetic core finished product.
As preferably, in step (1), nitrogen atomization pressure is 1～3MPa.
As preferably, in step (2), on the basis of magnetic powder gross mass, granularity of magnet powder combination is particularly as follows :-140+200
Mesh magnetic powder 10～35% ,-200+325 mesh magnetic powder 10～35% ,-325+500 mesh magnetic powders 30～80%.By controlling not
Same granularity of magnet powder combination, the magnetic core of available different pcrmeabilities.
As preferably, in step (3), ball-milling medium is one or more in Kaolin, silicon dioxide or alumina powder,
Addition is the 0.1～1% of magnetic powder, and ball milling uses steel ball or zirconium ball, the diameter of its sizes of balls be respectively 7～10mm and 4～
6mm, Ball-milling Time is 10min to 240min, and ratio of grinding media to material is 1:(1～3).By controlling ball-milling technology, to ensure magnetic particle capability
Concordance.
As preferably, in step (5), described treatment fluid be a kind of in phosphoric acid, phosphoric acid acid salt, chromic acid, bichromate or
Multiple aqueous solution, on the basis of the magnetic powder quality after heat treatment, phosphoric acid, phosphoric acid acid salt, chromic acid, bichromate interpolation total
Quality is 0.1～10%.
As preferably, in step (5), drying temperature is 100～200 DEG C, and drying time is 5～120min.
As preferably, in step (7), covering is the aqueous dispersions of Kaolin and potassium silicate, kaolinic in covering
Weight/mass percentage composition is 0.1～2%, and the mass ratio of Kaolin and potassium silicate is 3:(2～3), with the magnetic powder quality after film forming be
Benchmark, the addition of covering controls 1～10%；Or be the aqueous dispersions of Kaolin and sodium silicate, Kaolin in covering
Weight/mass percentage composition be 0.1～2%, the mass ratio of Kaolin and sodium silicate is 3:(2～3), with the magnetic powder quality after film forming
On the basis of, the addition of covering controls 1～10%, and kaolinic granularity is-1000 mesh.
As preferably, in step (8), briquetting pressure is 1000～2500MPa.
As preferably, in step (8), described lubricant is zinc stearate or lithium stearate.
Therefore, there is advantages that
(1), after magnetic powder mixing and ball milling medium carries out ball-milling treatment, ferrum nickel magnetic powder is internal introduces defect, and these defects are at high temperature
Can promote after heat treatment that the crystal grain of magnetic powder is grown up, improve crystallite dimension, thus reduce coercivity, be conducive to improving pcrmeability；
(2) make magnetic powder surface form layer oxide film through heat treatment after using treatment fluid chemistry cladding, be conducive to improving magnetic
Conductance, can improve the bond strength of magnetic powder and dielectric film, it is ensured that do not rupture under dielectric film high-pressure molding, the most resistance to 650 simultaneously
High-temperature heat treatment more than DEG C, thus be conducive to improving magnetic powder high frequency performance；
(3) whole method processing step is simple, easily implements, workable.
Detailed description of the invention
Below by detailed description of the invention, the present invention will be further described.
Embodiment 1
(1) melting powder process: weigh nickel ingot and the ingot iron of 58Kg of 42Kg, be placed in intermediate frequency furnace and carry out melting, removes
After scum silica frost, the nitrogen using pressure to be 1MPa carries out powder by atomization；
(2) combinations of particle sizes: after being sieved by granularity by the magnetic powder obtained, carries out combinations of particle sizes by different grain size proportioning,
On the basis of magnetic powder gross mass, granularity of magnet powder combination is particularly as follows :-140+200 mesh magnetic powders 10% ,-200+325 mesh magnetic powders
10% ,-325+500 mesh magnetic powders 80%；
(3) magnetic powder ball milling: magnetic powder combination obtained mixes with ball-milling medium to be placed in ball grinder and carries out ball milling, ball milling
Medium is Kaolin, and addition is the 0.1% of magnetic powder, and ball milling uses steel ball, and the diameter of its sizes of balls is respectively 7mm and 4mm, ball
Time consuming is 10～240min, and ratio of grinding media to material is 1:1；
(4) heat treatment: by the magnetic powder after ball milling at N2Carrying out heat treatment under atmosphere, treatment temperature is 600 DEG C, processes the time
5h；
(5) chemistry cladding: being added by the magnetic powder after heat treatment in treatment fluid after mix and blend 1min, dry, treatment fluid is
Phosphate aqueous solution, on the basis of the magnetic powder quality after heat treatment, the addition of phosphoric acid is 0.1%, and drying temperature is 100 DEG C, dries
The dry time is 120min；
(6) oxidation filming: the magnetic powder after being coated with by chemistry is as N2In carry out heat treatment, treatment temperature 650 DEG C, during process
Between 120min；
(7) secondary insulating cladding: add mix homogeneously after covering in the magnetic powder after film forming, dry, covering is high
Ridge soil and the aqueous dispersions of potassium silicate, in covering, kaolinic weight/mass percentage composition is 0.1%, Kaolin and the matter of potassium silicate
Amount ratio is 3:2, and on the basis of the magnetic powder quality after film forming, the addition of covering controls 1%；Kaolinic granularity is-
1000 mesh；
(8) compressing: in briquetting pressure after addition lubricant (zinc stearate) in the magnetic powder after secondary insulating is coated with
It is pressed under 1000MPa, obtains blank magnetic core；
(9) magnetic core annealing: being placed in annealing furnace by blank magnetic core and anneal, annealing temperature is 600 DEG C, and annealing time is
200min；
(10) spray paint: blank magnetic core after annealing uses epoxy resin to solidify after spraying paint, and obtains magnetic core finished product.
Embodiment 2
(1) melting powder process: weigh nickel ingot and the ingot iron of 55Kg of 45Kg, be placed in intermediate frequency furnace and carry out melting, removes
After scum silica frost, the nitrogen using pressure to be 2MPa carries out powder by atomization；
(2) combinations of particle sizes: after being sieved by granularity by the magnetic powder obtained, carries out combinations of particle sizes by different grain size proportioning,
On the basis of magnetic powder gross mass, granularity of magnet powder combination is particularly as follows :-140+200 mesh magnetic powders 16% ,-200+325 mesh magnetic powders
16% ,-325+500 mesh magnetic powders 68%；
(3) magnetic powder ball milling: magnetic powder combination obtained mixes with ball-milling medium to be placed in ball grinder and carries out ball milling, ball milling
Medium is Kaolin and silicon dioxide (mass ratio 1:1), and addition is magnetic powder: 0.5%, and ball milling uses steel ball or zirconium ball, its
The diameter of sizes of balls is respectively 8mm and 5mm, and Ball-milling Time is 80min, and ratio of grinding media to material is 1:2；
(4) heat treatment: by the magnetic powder after ball milling at H2Carrying out heat treatment under atmosphere, treatment temperature is 700 DEG C, processes the time
4h；
(5) chemistry cladding: being added by the magnetic powder after heat treatment in treatment fluid after mix and blend 20min, dry, treatment fluid is
Phosphoric acid acid salt and chromium aqueous acid, on the basis of the magnetic powder quality after heat treatment, phosphoric acid acid salt, the total matter of interpolation of chromic acid
Amount is 7%, and drying temperature is 180 DEG C, and drying time is 40min；
(6) oxidation filming: the magnetic powder after being coated with by chemistry is as N2In carry out heat treatment, treatment temperature 750 DEG C, during process
Between 80min；
(7) secondary insulating cladding: add mix homogeneously after covering in the magnetic powder after film forming, dry, covering is high
Ridge soil and the aqueous dispersions of sodium silicate, in covering, kaolinic weight/mass percentage composition is 1%, Kaolin and the quality of sodium silicate
Ratio is 3:2.5, and on the basis of the magnetic powder quality after film forming, the addition of covering controls 1～10%, and kaolinic granularity is equal
For-1000 mesh；
(8) compressing: in briquetting pressure after addition lubricant (zinc stearate) in the magnetic powder after secondary insulating is coated with
It is pressed under 2000MPa, obtains blank magnetic core；
(9) magnetic core annealing: being placed in annealing furnace by blank magnetic core and anneal, annealing temperature is 700 DEG C, and annealing time is
80min；
(10) spray paint: blank magnetic core after annealing uses epoxy resin to solidify after spraying paint, and obtains magnetic core finished product.
Embodiment 3
(1) melting powder process: weigh nickel ingot and the ingot iron of 45Kg of 55Kg, be placed in intermediate frequency furnace and carry out melting, removes
After scum silica frost, the nitrogen using pressure to be 3MPa carries out powder by atomization；
(2) combinations of particle sizes: after being sieved by granularity by the magnetic powder obtained, carries out combinations of particle sizes by different grain size proportioning,
On the basis of magnetic powder gross mass, granularity of magnet powder combination is particularly as follows :-140+200 mesh magnetic powders 35% ,-200+325 mesh magnetic powders
35% ,-325+500 mesh magnetic powders 30%；
(3) magnetic powder ball milling: magnetic powder combination obtained mixes with ball-milling medium to be placed in ball grinder and carries out ball milling, ball milling
Medium is alumina powder, and addition is the 1% of magnetic powder, and ball milling uses steel ball, and the diameter of its sizes of balls is respectively 10mm and 6mm,
Ball-milling Time is 240min, and ratio of grinding media to material is 1:3；
(4) heat treatment: by the magnetic powder after ball milling at H2Carrying out heat treatment under atmosphere, treatment temperature is 900 DEG C, processes the time
3h；
(5) chemistry cladding: the magnetic powder after heat treatment is added in treatment fluid after mix and blend 1～30min, dry, process
Liquid is attached most importance to chromate aqueous solution, and on the basis of the magnetic powder quality after heat treatment, the interpolation gross mass of bichromate is 10%, dries
Temperature is 200 DEG C, and drying time is 5min；
(6) oxidation filming: the magnetic powder after being coated with by chemistry is as N2In carry out heat treatment, treatment temperature 850 DEG C, during process
Between 120min；
(7) secondary insulating cladding: add mix homogeneously after covering in the magnetic powder after film forming, dry, covering is high
Ridge soil and the aqueous dispersions of potassium silicate, in covering, kaolinic weight/mass percentage composition is 2%, Kaolin and the quality of potassium silicate
Than being 3:3, on the basis of the magnetic powder quality after film forming, the addition of covering controls 10%, and kaolinic granularity is-
1000 mesh；
(8) compressing: in briquetting pressure after addition lubricant (lithium stearate) in the magnetic powder after secondary insulating is coated with
It is pressed under 2500MPa, obtains blank magnetic core；
(9) magnetic core annealing: being placed in annealing furnace by blank magnetic core and anneal, annealing temperature is 800 DEG C, and annealing time is
200min；
(10) spray paint: blank magnetic core after annealing uses epoxy resin to solidify after spraying paint, and obtains magnetic core finished product.
It is as follows that each embodiment prepares magnetic core end properties:
As seen from the above table, the magnet pcrmeability that the present invention prepares is high, and magnetic property is excellent.
Embodiment described above is the one preferably scheme of the present invention, not makees the present invention any pro forma
Limit, on the premise of without departing from the technical scheme described in claim, also have other variant and remodeling.
Claims (9)
1. a ferrum nickel metal magnetic powder core preparation method, it is characterised in that comprise the following steps:
(1) melting powder process: weigh nickel ingot and the ingot iron of 45～58 weight portions of 42～55 weight portions, be placed in intermediate frequency furnace
Row melting, after removing scum silica frost, uses nitrogen to carry out powder by atomization；
(2) combinations of particle sizes: after being sieved by granularity by the magnetic powder obtained, carries out combinations of particle sizes by different grain size proportioning；
(3) magnetic powder ball milling: magnetic powder combination obtained mixes with ball-milling medium to be placed in ball grinder and carries out ball milling；
(4) heat treatment: by the magnetic powder after ball milling at N2Or H2Carrying out heat treatment under atmosphere, treatment temperature is 600～900 DEG C, processes
Time 3～5h；
(5) chemistry cladding: the magnetic powder after heat treatment is added in treatment fluid after mix and blend 1～30min, dry；
(6) oxidation filming: the magnetic powder after being coated with by chemistry is as N2In carry out heat treatment, treatment temperature 650～850 DEG C, during process
Between 30～120min；
(7) secondary insulating cladding: add mix homogeneously after covering in the magnetic powder after film forming, dry；
(8) compressing: to be pressed after the magnetic powder after insulating wrapped adds lubricant, obtain blank magnetic core；
(9) magnetic core annealing: being placed in annealing furnace by blank magnetic core and anneal, annealing temperature is 600～800 DEG C, annealing time
It is 30～200min；
(10) spray paint: blank magnetic core surface after annealing solidifies after spraying paint, and obtains magnetic core finished product.
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (1), nitrogen
Atomizing pressure is 1～3MPa.
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (2), with magnetic
On the basis of powder gross mass, granularity of magnet powder combination is particularly as follows :-140+200 mesh magnetic powder 10～35% ,-200+325 mesh magnetic powders
10～35% ,-325+500 mesh magnetic powders 30～80%.
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (3), ball milling
Medium is one or more in Kaolin, silicon dioxide or alumina powder, and addition is the 0.1～1% of magnetic powder, and ball milling uses
Steel ball or zirconium ball, the diameter of its sizes of balls is respectively 7～10mm and 4～6mm, and Ball-milling Time is 10～240min, and ratio of grinding media to material is
1:(1～3).
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (5), described
Treatment fluid is the aqueous solution of one or more in phosphoric acid, phosphoric acid acid salt, chromic acid, bichromate, with the magnetic powder matter after heat treatment
On the basis of amount, phosphoric acid, phosphoric acid acid salt, chromic acid, the interpolation gross mass of bichromate are 0.1～10%.
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (5), dry
Temperature is 100～200 DEG C, and drying time is 5～120min.
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (7), cladding
Agent is the aqueous dispersions of Kaolin and potassium silicate, and in covering, kaolinic weight/mass percentage composition is 0.1～2%, Kaolin and
The mass ratio of potassium silicate is 3:(2～3), on the basis of the magnetic powder quality after film forming, the addition of covering control 1～
10%；Or be the aqueous dispersions of Kaolin and sodium silicate, in covering, kaolinic weight/mass percentage composition is 0.1～2%, kaolinite
Soil and the mass ratio of sodium silicate are 3:(2～3), on the basis of the magnetic powder quality after film forming, the addition of covering control 1～
10%, kaolinic granularity is-1000 mesh.
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (8), molding
Pressure is 1000～2500MPa.
A kind of ferrum nickel metal magnetic powder core preparation method the most according to claim 1, it is characterised in that in step (8), described
Lubricant is zinc stearate or lithium stearate.
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| CN107578875A (en) * | 2017-10-17 | 2018-01-12 | 德清森腾电子科技有限公司 | A kind of manufacturing process of sendust soft-magnetic composite material |
| CN107578876A (en) * | 2017-10-17 | 2018-01-12 | 德清森腾电子科技有限公司 | A kind of manufacturing process of ferro-silicium soft-magnetic composite material |
| CN107578874A (en) * | 2017-09-14 | 2018-01-12 | 横店集团东磁股份有限公司 | A kind of preparation method of the iron nickel powder core of magnetic permeability μ=200 |
| CN108053963A (en) * | 2017-11-17 | 2018-05-18 | 横店集团东磁股份有限公司 | A kind of preparation method of high magnetic permeability iron nickel material |
| CN108231393A (en) * | 2017-12-13 | 2018-06-29 | 横店集团东磁股份有限公司 | A kind of preparation method of high magnetic permeability iron nickel magnetic core |
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| CN107578874B (en) * | 2017-09-14 | 2019-04-05 | 横店集团东磁股份有限公司 | A kind of preparation method of the iron nickel powder core of magnetic permeability μ=200 |
| CN107578875A (en) * | 2017-10-17 | 2018-01-12 | 德清森腾电子科技有限公司 | A kind of manufacturing process of sendust soft-magnetic composite material |
| CN107578876A (en) * | 2017-10-17 | 2018-01-12 | 德清森腾电子科技有限公司 | A kind of manufacturing process of ferro-silicium soft-magnetic composite material |
| CN108053963A (en) * | 2017-11-17 | 2018-05-18 | 横店集团东磁股份有限公司 | A kind of preparation method of high magnetic permeability iron nickel material |
| CN108231393A (en) * | 2017-12-13 | 2018-06-29 | 横店集团东磁股份有限公司 | A kind of preparation method of high magnetic permeability iron nickel magnetic core |
| CN109680210A (en) * | 2018-12-18 | 2019-04-26 | 横店集团东磁股份有限公司 | A kind of preparation method of μ=150~250 iron-silicon-aluminum soft magnet powder cores |
| CN109680210B (en) * | 2018-12-18 | 2020-03-20 | 横店集团东磁股份有限公司 | Preparation method of mu = 150-250 sendust soft magnetic powder core |
| CN110434326A (en) * | 2019-08-01 | 2019-11-12 | 浙江工业大学 | A kind of method of soft magnetic metal powder surface in-stiu coating lithium aluminum oxide insulating layer |
| CN110957123A (en) * | 2019-12-17 | 2020-04-03 | 山西中磁尚善科技有限公司 | Method for preparing iron-nickel soft magnetic powder core with magnetic conductivity of 125 |
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| CN114068122A (en) * | 2021-11-30 | 2022-02-18 | 横店集团东磁股份有限公司 | High-permeability Fe-Si-Cr soft magnetic material and preparation method and application thereof |
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Application publication date: 20161207 Assignee: Jinhua cimeng Intellectual Property Service Co.,Ltd. Assignor: HENGDIAN GROUP DMEGC MAGNETICS Co.,Ltd. Contract record no.: X2023330000883 Denomination of invention: A method for preparing iron nickel metal magnetic powder cores Granted publication date: 20180608 License type: Common License Record date: 20231128 |