CN106205929B - A kind of iron nickel metal magnetic powder core preparation method - Google Patents
A kind of iron nickel metal magnetic powder core preparation method Download PDFInfo
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- CN106205929B CN106205929B CN201610693252.6A CN201610693252A CN106205929B CN 106205929 B CN106205929 B CN 106205929B CN 201610693252 A CN201610693252 A CN 201610693252A CN 106205929 B CN106205929 B CN 106205929B
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- 239000006247 magnetic powder Substances 0.000 title claims abstract description 113
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 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 39
- 239000000843 powder Substances 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 11
- 238000005253 cladding Methods 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims abstract description 7
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 238000000748 compression moulding Methods 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
- 238000000137 annealing Methods 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000005995 Aluminium silicate Substances 0.000 claims description 16
- 235000012211 aluminium silicate Nutrition 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 10
- 239000004111 Potassium silicate Substances 0.000 claims description 8
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 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
- 239000006185 dispersion Substances 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 6
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 6
- 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 6
- 238000000227 grinding Methods 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 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
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [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
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 238000012387 aerosolization Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 238000007592 spray painting technique Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 239000003973 paint Substances 0.000 abstract description 5
- 239000011162 core material Substances 0.000 description 38
- 230000007547 defect Effects 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000000465 moulding Methods 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
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 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
- 230000006698 induction Effects 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
- 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 iron nickel metal magnetic powder core preparation methods, include the following steps：(1) melting powder；(2) combinations of particle sizes；(3) magnetic powder ball milling；(4) it is heat-treated；(5) chemistry cladding；(6) oxidation filming；(7) secondary insulating coats；(8) compression moulding；(9) magnetic core is annealed；(10) it paints.Present invention process step is simple, easily implements, and operability is strong, and iron nickel powder core obtained has higher magnetic conductivity.
Description
Technical field
The present invention relates to metal soft magnetic material technical field, more particularly, to a kind of iron nickel metal magnetic powder core preparation method.
Background technology
Metal magnetic powder core is widely used in inductor, reactor and transformer as a kind of novel soft magnetic materials
In the middle, a kind of product indispensable as electronic material.As electronic equipment is to high frequency and miniaturization, to metallic magnetic
The requirement of powder core be also it is higher and higher, metal magnetic powder core as soft magnetic products, be also towards it is lower be lost, higher saturation
Magnetic induction intensity direction is developed.Wherein iron nickel metal magnetic powder core has high Bs, and high DC-bias abilities are widely used in various electricity
In sub- device, which is monopolized for a long time by South Korea CSC.
The patent that the country prepares iron nickel metal magnetic powder core is more, Patent CN201110133772.9 mover iron nickel magnetic
Powder uses the method that phosphoric acid is handled to obtain magnetic conductivity as 125 iron nickel magnetic powder core material, and principle is magnetic powder Surface Creation one
Phosphate layer is planted to increase sheet resistance, so as to improve the overall electrical resistance of magnetic core, loss is reduced, improves high frequency performance.It is but this
There are shortcomings, such as magnetic powder to be molded at elevated pressures for method, and insulating film is easy to fragmentation, leads to decreasing insulating；Its magnetic powder
Insulating film is generally just thermally decomposed at 600 DEG C or more, makes decreasing insulating, and high frequency performance reduces, loss raising, and is prepared
High permeability magnetic core has to high pressure molding and the heat treatment more than 600 DEG C fully eliminates stress and improves magnetic conductivity, because
This this kind of method can not prepare the iron nickel powder core of more high magnetic permeability higher performance.
Invention content
The present invention is to solve the problems, such as that the iron nickel powder core magnetic conductivity of the prior art is low, provide a kind of processing step
Simply, easily implement, the strong iron nickel preparation process for magnetic powder core of operability, iron nickel powder core obtained has higher magnetic conductivity.
To achieve these goals, the present invention uses following technical scheme：
A kind of iron nickel metal magnetic powder core preparation method of the present invention, includes the following steps：
(1) melting powder：The nickel ingot of 42~55 parts by weight and the ingot iron of 45~58 parts by weight are weighed, is placed in intermediate frequency furnace
After removing dross, powder by atomization is carried out using nitrogen for middle carry out melting.
(2) combinations of particle sizes：After obtained magnetic powder is sieved by granularity, matched by different grain size and carry out combinations of particle sizes.
(3) magnetic powder ball milling：The magnetic powder that combination obtains is mixed to be placed in ball grinder with ball-milling medium and carries out ball milling.Magnetic powder
After mixing and ball milling medium carries out ball-milling treatment, defect, such as stress, sliding, impurity, these defects are introduced inside iron nickel magnetic powder
Magnetic powder internal grain can be promoted to grow up after high-temperature heat treatment, advantageously reduce coercivity, improve magnetic conductivity.
(4) it is heat-treated：By the magnetic powder after ball milling in N2Or H2It being heat-treated under atmosphere, treatment temperature is 600~900 DEG C,
3~5h of processing time.
(5) chemistry cladding：Magnetic powder after heat treatment is added in treatment fluid after 1~30min is mixed, drying.
(6) oxidation filming：Magnetic powder after chemistry is coated is as N2In be heat-treated, 650~850 DEG C for the treatment of temperature,
30~120min of processing time.Previous chemical films are decomposed in the step, magnetic powder Surface Creation metal oxide film, this layer oxidation
The binding force of film and metal magnetic enhance, thickness is thinning, be conducive to prepare high permeability magnetic core, while can improve magnetic powder with absolutely
The bond strength of velum, it is ensured that do not ruptured under insulating film high-pressure molding, while resistance to 650 DEG C or more of high-temperature heat treatment, so as to have
Conducive to raising magnetic powder high frequency performance.
(7) secondary insulating coats：It is uniformly mixed after covering is added in magnetic powder after film forming, drying.
(8) compression moulding：It is pressed after adding in lubricant in magnetic powder after secondary insulating cladding, obtains blank magnetic
Core.
(9) magnetic core is annealed：Blank magnetic core is placed in annealing furnace and is annealed, annealing temperature is 600~800 DEG C, annealing
Time is 30~200min.
(10) it paints：Curing is to get magnetic core finished product after blank magnetic core after annealing is painted.
Preferably, in step (1), nitrogen atomization pressure is 1~3MPa.
Preferably, in step (2), on the basis of magnetic powder gross mass, granularity of magnet powder combination is specially：- 140 -+200
10~35% ,-200 -+325 mesh magnetic powder of mesh magnetic powder, 10~35% ,-325 -+500 mesh magnetic powder 30~80%.By controlling not
Same granularity of magnet powder combination, can obtain the magnetic core of different magnetic conductivities.
Preferably, in step (3), ball-milling medium be it is one or more in kaolin, silica or alumina powder,
Additive amount is the 0.1~1% of magnetic powder, and ball milling uses steel ball or zirconium ball, the diameter of sizes of balls be respectively 7~10mm and 4~
6mm, Ball-milling Time be 10min to 240min, ratio of grinding media to material 1：(1~3).By controlling ball-milling technology, to ensure magnetic particle capability
Consistency.
Preferably, in step (5), the treatment fluid is phosphoric acid, it is a kind of in phosphoric acid acid salt, chromic acid, bichromate or
A variety of aqueous solutions, on the basis of the magnetic powder quality after heat treatment, phosphoric acid, phosphoric acid acid salt, chromic acid, the addition of bichromate are total
Quality is 0.1~10%.
Preferably, in step (5), drying temperature is 100~200 DEG C, and drying time is 5~120min.
Preferably, in step (7), covering is kaolin and the aqueous dispersions of potassium silicate, kaolinic in covering
Mass percentage is 0.1~2%, and the mass ratio of kaolin and potassium silicate is 3：(2~3), using the magnetic powder quality after film forming as
Benchmark, the addition of covering are controlled 1~10%；Or the aqueous dispersions for kaolin and sodium metasilicate, kaolin in covering
Mass percentage for 0.1~2%, the mass ratio of kaolin and sodium metasilicate is 3：(2~3), with the magnetic powder quality after film forming
On the basis of, for the control of the addition of covering 1~10%, kaolinic granularity is -1000 mesh.
Preferably, in step (8), briquetting pressure is 1000~2500MPa.
Preferably, in step (8), the lubricant is zinc stearate or lithium stearate.
Therefore, the present invention has the advantages that：
(1) after magnetic powder mixing and ball milling medium carries out ball-milling treatment, defect is introduced inside iron nickel magnetic powder, these defects are in high temperature
The crystal grain of magnetic powder can be promoted to grow up after heat treatment, improve crystallite dimension, so as to reduce coercivity, be conducive to improve magnetic conductivity；
(2) magnetic powder surface is made to form layer oxide film through heat treatment after being coated using treatment fluid chemistry, is conducive to improve magnetic
Conductance, while the bond strength of magnetic powder and insulating film can be improved, it is ensured that it is not ruptured under insulating film high-pressure molding, while resistance to 650
DEG C or more high-temperature heat treatment, so as to be conducive to improve magnetic powder high frequency performance；
(3) entire method processing step is simple, easily implements, and operability is strong.
Specific embodiment
Below by specific embodiment, the present invention will be further described.
Embodiment 1
(1) melting powder：The nickel ingot of 42Kg and the ingot iron of 58Kg are weighed, is placed in intermediate frequency furnace and carries out melting, is removed
After scum silica frost, pressure is used to carry out powder by atomization for the nitrogen of 1MPa；
(2) combinations of particle sizes：After obtained magnetic powder is sieved by granularity, matched by different grain size and carry out combinations of particle sizes,
On the basis of magnetic powder gross mass, granularity of magnet powder combination is specially：- 140 -+200 mesh magnetic powders 10% ,-200 -+325 mesh magnetic powders
10% ,-325 -+500 mesh magnetic powders 80%；
(3) magnetic powder ball milling：The magnetic powder that combination obtains is mixed to be placed in ball grinder with ball-milling medium and carries out ball milling, ball milling
Medium is kaolin, and additive amount is the 0.1% of magnetic powder, and ball milling uses steel ball, and the diameter of sizes of balls is respectively 7mm and 4mm, ball
It consumes time as 10~240min, ratio of grinding media to material 1：1；
(4) it is heat-treated：By the magnetic powder after ball milling in N2It is heat-treated under atmosphere, treatment temperature is 600 DEG C, processing time
5h；
(5) chemistry cladding：Magnetic powder after heat treatment is added in treatment fluid after 1min is mixed, drying, treatment fluid is
Phosphate aqueous solution, on the basis of the magnetic powder quality after heat treatment, the additive amount of phosphoric acid is 0.1%, and drying temperature is 100 DEG C, is dried
The dry time is 120min；
(6) oxidation filming：Magnetic powder after chemistry is coated is as N2In be heat-treated, 650 DEG C for the treatment of temperature, during processing
Between 120min；
(7) secondary insulating coats：It is uniformly mixed after covering is added in magnetic powder after film forming, drying, covering is height
The aqueous dispersions of ridge soil and potassium silicate, kaolinic mass percentage is 0.1% in covering, the matter of kaolin and potassium silicate
Amount is than being 3：2, on the basis of the magnetic powder quality after film forming, the addition of covering is controlled 1%；Kaolinic granularity is-
1000 mesh；
(8) compression moulding：In briquetting pressure after lubricant (zinc stearate) being added in magnetic powder after secondary insulating cladding
It is pressed under 1000MPa, obtains blank magnetic core；
(9) magnetic core is annealed：Blank magnetic core is placed in annealing furnace and is annealed, annealing temperature is 600 DEG C, and annealing time is
200min；
(10) it paints：Curing is to get magnetic core finished product after blank magnetic core after annealing is painted using epoxy resin.
Embodiment 2
(1) melting powder：The nickel ingot of 45Kg and the ingot iron of 55Kg are weighed, is placed in intermediate frequency furnace and carries out melting, is removed
After scum silica frost, pressure is used to carry out powder by atomization for the nitrogen of 2MPa；
(2) combinations of particle sizes：After obtained magnetic powder is sieved by granularity, matched by different grain size and carry out combinations of particle sizes,
On the basis of magnetic powder gross mass, granularity of magnet powder combination is specially：- 140 -+200 mesh magnetic powders 16% ,-200 -+325 mesh magnetic powders
16% ,-325 -+500 mesh magnetic powders 68%；
(3) magnetic powder ball milling：The magnetic powder that combination obtains is mixed to be placed in ball grinder with ball-milling medium and carries out ball milling, ball milling
Medium is kaolin and silica (mass ratio 1：1), additive amount is magnetic powder:0.5%, ball milling uses steel ball or zirconium ball,
The diameter of sizes of balls is respectively 8mm and 5mm, Ball-milling Time 80min, ratio of grinding media to material 1：2；
(4) it is heat-treated：By the magnetic powder after ball milling in H2It is heat-treated under atmosphere, treatment temperature is 700 DEG C, processing time
4h；
(5) chemistry cladding：Magnetic powder after heat treatment is added in treatment fluid after 20min is mixed, drying, treatment fluid is
The aqueous solution of phosphoric acid acid salt and chromic acid, on the basis of the magnetic powder quality after heat treatment, phosphoric acid acid salt, chromic acid the total matter of addition
It is 7% to measure, and drying temperature is 180 DEG C, drying time 40min；
(6) oxidation filming：Magnetic powder after chemistry is coated is as N2In be heat-treated, 750 DEG C for the treatment of temperature, during processing
Between 80min；
(7) secondary insulating coats：It is uniformly mixed after covering is added in magnetic powder after film forming, drying, covering is height
The aqueous dispersions of ridge soil and sodium metasilicate, kaolinic mass percentage is 1% in covering, the quality of kaolin and sodium metasilicate
Than being 3：2.5, on the basis of the magnetic powder quality after film forming, for the control of the addition of covering 1~10%, kaolinic granularity is equal
For -1000 mesh；
(8) compression moulding：In briquetting pressure after lubricant (zinc stearate) being added in magnetic powder after secondary insulating cladding
It is pressed under 2000MPa, obtains blank magnetic core；
(9) magnetic core is annealed：Blank magnetic core is placed in annealing furnace and is annealed, annealing temperature is 700 DEG C, and annealing time is
80min；
(10) it paints：Curing is to get magnetic core finished product after blank magnetic core after annealing is painted using epoxy resin.
Embodiment 3
(1) melting powder：The nickel ingot of 55Kg and the ingot iron of 45Kg are weighed, is placed in intermediate frequency furnace and carries out melting, is removed
After scum silica frost, pressure is used to carry out powder by atomization for the nitrogen of 3MPa；
(2) combinations of particle sizes：After obtained magnetic powder is sieved by granularity, matched by different grain size and carry out combinations of particle sizes,
On the basis of magnetic powder gross mass, granularity of magnet powder combination is specially：- 140 -+200 mesh magnetic powders 35% ,-200 -+325 mesh magnetic powders
35% ,-325 -+500 mesh magnetic powders 30%；
(3) magnetic powder ball milling：The magnetic powder that combination obtains is mixed to be placed in ball grinder with ball-milling medium and carries out ball milling, ball milling
Medium is alumina powder, and additive amount is the 1% of magnetic powder, and ball milling uses steel ball, and the diameter of sizes of balls is respectively 10mm and 6mm,
Ball-milling Time is 240min, ratio of grinding media to material 1：3；
(4) it is heat-treated：By the magnetic powder after ball milling in H2It is heat-treated under atmosphere, treatment temperature is 900 DEG C, processing time
3h；
(5) chemistry cladding：Magnetic powder after heat treatment is added in treatment fluid after 1~30min is mixed, dried, processing
Liquid is attached most importance to chromate aqueous solution, and on the basis of the magnetic powder quality after heat treatment, the addition gross mass of bichromate is 10%, drying
Temperature is 200 DEG C, drying time 5min；
(6) oxidation filming：Magnetic powder after chemistry is coated is as N2In be heat-treated, 850 DEG C for the treatment of temperature, during processing
Between 120min；
(7) secondary insulating coats：It is uniformly mixed after covering is added in magnetic powder after film forming, drying, covering is height
The aqueous dispersions of ridge soil and potassium silicate, kaolinic mass percentage is 2% in covering, the quality of kaolin and potassium silicate
Than being 3：3, on the basis of the magnetic powder quality after film forming, the control of the addition of covering 10%, kaolinic granularity is-
1000 mesh；
(8) compression moulding：In briquetting pressure after lubricant (lithium stearate) being added in magnetic powder after secondary insulating cladding
It is pressed under 2500MPa, obtains blank magnetic core；
(9) magnetic core is annealed：Blank magnetic core is placed in annealing furnace and is annealed, annealing temperature is 800 DEG C, and annealing time is
200min；
(10) it paints：Curing is to get magnetic core finished product after blank magnetic core after annealing is painted using epoxy resin.
It is as follows that magnetic core end properties are made in each embodiment：
As seen from the above table, magnet magnetic conductivity produced by the present invention is high, and magnetic property is excellent.
Embodiment described above is a kind of preferable scheme of the present invention, and not the present invention is made in any form
Limitation also has other variants and remodeling under the premise of without departing from the technical solution recorded in claim.
Claims (9)
1. a kind of iron nickel metal magnetic powder core preparation method, which is characterized in that include the following steps：
（1）Melting powder：The nickel ingot of 42 ~ 55 parts by weight and the ingot iron of 45 ~ 58 parts by weight are weighed, is placed in intermediate frequency furnace
Melting is carried out, after removing dross, powder by atomization is carried out using nitrogen；
（2）Combinations of particle sizes：After obtained magnetic powder is sieved by granularity, matched by different grain size and carry out combinations of particle sizes；
（3）Magnetic powder ball milling：The magnetic powder that combination obtains is mixed to be placed in ball grinder with ball-milling medium and carries out ball milling；
（4）Heat treatment：Magnetic powder after ball milling is heat-treated under N2 or H2 atmosphere, treatment temperature is 600 ~ 900 DEG C,
3 ~ 5h of processing time；
（5）Chemistry cladding：Magnetic powder after heat treatment is added in treatment fluid after 1 ~ 30min is mixed, drying；
（6）Oxidation filming：As for being heat-treated in N2,650 ~ 850 DEG C for the treatment of temperature is handled magnetic powder after chemistry is coated
30 ~ 120min of time；
（7）Secondary insulating coats：It is uniformly mixed after covering is added in magnetic powder after film forming, drying；
（8）Compression moulding：It is pressed after adding in lubricant in magnetic powder after insulating wrapped, obtains blank magnetic core；（9）Magnetic
Core is annealed：Blank magnetic core is placed in annealing furnace and is annealed, annealing temperature is 600 ~ 800 DEG C, annealing time for 30 ~
200min；
（10）Spray painting：Curing is to get magnetic core finished product after blank magnetic core surface after annealing is painted.
A kind of 2. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（1）In, nitrogen
Aerosolization pressure is 1 ~ 3MPa.
A kind of 3. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（2）In, with
On the basis of magnetic powder gross mass, granularity of magnet powder combination is specially：10 ~ 35% ,-200 -+325 mesh magnetic of-140 -+200 mesh magnetic powder
10 ~ 35% ,-325 -+500 mesh magnetic powder 30 ~ 80% of powder.
A kind of 4. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（3）In, ball
Grinding media is one or more in kaolin, silica or alumina powder, and additive amount is the 0.1 ~ 1% of magnetic powder, and ball milling uses
Steel ball or zirconium ball, the diameter of 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 5. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（5）In, institute
Treatment fluid is stated as aqueous solution one or more in phosphoric acid, phosphoric acid acid salt, chromic acid, bichromate, with the magnetic powder after heat treatment
On the basis of quality, phosphoric acid, phosphoric acid acid salt, chromic acid, bichromate addition gross mass be 0.1 ~ 10%.
A kind of 6. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（5）In,
Drying temperature is 100 ~ 200 DEG C, and drying time is 5 ~ 120min.
A kind of 7. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（7）In, packet
Cover aqueous dispersions of the agent for kaolin and potassium silicate, kaolinic mass percentage is 0.1 ~ 2% in covering, 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 is controlled 1 ~ 10%；
Or the aqueous dispersions for kaolin and sodium metasilicate, kaolinic mass percentage is 0.1 ~ 2% in covering, kaolin and silicon
The mass ratio of sour sodium is 3：（2~3）, on the basis of the magnetic powder quality after film forming, the control of the addition of covering is high 1 ~ 10%
The granularity of ridge soil is -1000 mesh.
A kind of 8. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（8）In, into
Type pressure is 1000 ~ 2500MPa.
A kind of 9. iron nickel metal magnetic powder core preparation method according to claim 1, which is characterized in that step（8）In, institute
Lubricant is stated as zinc stearate or lithium stearate.
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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 |
| CN107578875B (en) * | 2017-10-17 | 2020-05-12 | 德清森腾电子科技有限公司 | Manufacturing process of iron-silicon-aluminum alloy soft magnetic composite material |
| CN107578876B (en) * | 2017-10-17 | 2020-05-12 | 德清森腾电子科技有限公司 | Manufacturing process of iron-silicon alloy 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 |
| 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 |
| CN110434326B (en) * | 2019-08-01 | 2021-09-17 | 浙江工业大学 | Method for coating lithium aluminum oxide insulating layer on surface of metal soft magnetic powder in situ |
| 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 |
| CN113470960A (en) * | 2021-07-07 | 2021-10-01 | 惠州市安可远磁性器件有限公司 | Production process of iron-nickel metal magnetic powder core |
| 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 |
| CN115116733B (en) * | 2022-07-18 | 2023-03-24 | 麦格磁电科技（珠海）有限公司 | Preparation method of high-frequency low-loss MPP soft magnetic alloy powder core |
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| CN105834440A (en) * | 2016-06-12 | 2016-08-10 | 横店集团东磁股份有限公司 | Method for preparing high-permeability flaky soft magnetic alloy powder |
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| JPH11176680A (en) * | 1997-12-11 | 1999-07-02 | Tokin Corp | Manufacture of core |
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