CN107689280A - Powder core, molding inductance and its manufacture method - Google Patents
Powder core, molding inductance and its manufacture method Download PDFInfo
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- CN107689280A CN107689280A CN201710522893.XA CN201710522893A CN107689280A CN 107689280 A CN107689280 A CN 107689280A CN 201710522893 A CN201710522893 A CN 201710522893A CN 107689280 A CN107689280 A CN 107689280A
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- 239000000843 powder Substances 0.000 title claims abstract description 265
- 238000000465 moulding Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 105
- 239000002131 composite material Substances 0.000 claims abstract description 63
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000005253 cladding Methods 0.000 claims abstract description 30
- 229910052742 iron Inorganic materials 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000000853 adhesive Substances 0.000 claims abstract description 20
- 230000001070 adhesive effect Effects 0.000 claims abstract description 20
- 239000000314 lubricant Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000000889 atomisation Methods 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims description 29
- 229910045601 alloy Inorganic materials 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 18
- 238000002791 soaking Methods 0.000 claims description 15
- 229910052752 metalloid Inorganic materials 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- 238000010791 quenching Methods 0.000 claims description 10
- 230000000171 quenching effect Effects 0.000 claims description 9
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 5
- 229920001568 phenolic resin Polymers 0.000 claims description 5
- 238000009692 water atomization Methods 0.000 claims description 5
- 239000004642 Polyimide Substances 0.000 claims description 4
- 229910008423 Si—B Inorganic materials 0.000 claims description 4
- 150000001408 amides Chemical class 0.000 claims description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 4
- 239000008116 calcium stearate Substances 0.000 claims description 4
- 235000013539 calcium stearate Nutrition 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 4
- 239000004643 cyanate ester Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 235000019359 magnesium stearate Nutrition 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 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
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 150000002738 metalloids Chemical class 0.000 claims 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 239000000696 magnetic material Substances 0.000 abstract description 2
- 238000004663 powder metallurgy Methods 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 71
- 230000000052 comparative effect Effects 0.000 description 19
- 238000005516 engineering process Methods 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000036314 physical performance Effects 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000012387 aerosolization Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- WKPSFPXMYGFAQW-UHFFFAOYSA-N iron;hydrate Chemical compound O.[Fe] WKPSFPXMYGFAQW-UHFFFAOYSA-N 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010010 raising Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229940087654 iron carbonyl Drugs 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- XIVNZHXRIPJOIZ-UHFFFAOYSA-N octadecanoic acid;zinc Chemical compound [Zn].CCCCCCCCCCCCCCCCCC(O)=O XIVNZHXRIPJOIZ-UHFFFAOYSA-N 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 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
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15325—Amorphous metallic alloys, e.g. glassy metals containing rare earths
-
- 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
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/102—Metallic powder coated with organic material
-
- 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
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
-
- 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
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15358—Making agglomerates therefrom, e.g. by pressing
-
- 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
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15383—Applying coatings thereon
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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
- H01F1/12—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
- H01F1/20—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 in the form of particles, e.g. powder
- H01F1/22—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 in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—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 in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
- H01F1/26—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 in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F2017/048—Fixed inductances of the signal type with magnetic core with encapsulating core, e.g. made of resin and magnetic powder
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The present invention relates to a kind of powder core, molding inductance and its manufacture method, belong to powder metallurgy and technical field of magnetic materials.Powder core uses the cladding powder being prepared using composite powder, adhesive, lubricant as raw material, is pressed successively, is heat-treated and is fabricated；Molding inductance be by the embedment of the coil of advance coiling using composite powder, adhesive, lubricant as the cladding powder that raw material is prepared after be fabricated through being integrally formed.Composite powder includes following component：5~30wt% of 70~95wt% of Fe-based amorphous alloy powders A and Fe-based amorphous alloy powder B；A is by the way that iron-based amorphous alloy ribbon material to be carried out to brittle heat treatment successively, Mechanical Crushing is handled, prepared by air-flow break process, and B is prepared by atomization；The powders A or powder B particle diameter are less than or equal to 30 μm.The powder core soft magnet performance manufactured using manufacture method provided by the invention is preferable, and molding inductance temperature rise is relatively low.
Description
Technical field
The present invention relates to a kind of powder core, molding inductance and its manufacture method, belong to powder metallurgy and magnetic material technology
Field.
Background technology
In the high-speed developing period of electronic technology, inductance is used widely, and tends to high frequency, low electricity especially with power supply
Pressure, the development of high current, are molded the birth of inductance, not only simplify the complicated technology of traditional wire-wound inductor, also meet
Notebook computer, tablet personal computer and server power supply high speed, Large Copacity CPU power circuit in require that inductance can carry height
The requirement of frequency and high current.Such inductance requires that there is core material higher saturation magnetic strength Bs to meet to work not under high current
Inductance saturation can be caused, while also require that there is core material higher resistivity to adapt to the high-frequency work state under MHz.
The production program of molding inductance is that the coil that coiling is completed is embedded into soft magnetic metal cladding powder, by press pressure
Type is made, last low-temperature setting is integral.Gained inductance is the solid magnet of one that powder is combined together with copper cash, so more
More is that requirement magnetic core has lower loss, effectively to reduce inductance temperature rise.
The content of the invention
In view of the shortcomings of the prior art, an object of the present invention is to provide a kind of powder core and its manufacture method.
The second object of the present invention is to provide a kind of molding inductance and its manufacture method.
To achieve the above object, the present invention uses following technical scheme：
A kind of powder core, the cladding powder being prepared using composite powder, adhesive, lubricant as raw material is used,
It is pressed successively, is heat-treated and is fabricated；The composite powder, by weight percentage including following component：Iron
Based amorphous alloy powder A 70~95% (such as 72%, 75%, 78%, 80%, 85%, 88%, 90%, 92%, 94%) and
Fe-based amorphous alloy powder B 5~30% (such as 6%, 8%, 10%, 15%, 18%, 22%, 25%, 28%)；Wherein,
The Fe-based amorphous alloy powders A is by the way that iron-based amorphous alloy ribbon material to be carried out to brittle heat treatment successively, machinery is broken
It is prepared by broken processing, air-flow break process；
The Fe-based amorphous alloy powder B is prepared by atomization；
The particle diameter of the powders A be less than or equal to 30 μm (such as 5 μm, 8 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25
μm, 28 μm), the particle diameter of the powder B be less than or equal to 30 μm (such as 5 μm, 8 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm,
25μm、28μm)。
In above-mentioned powder core, as a kind of preferred embodiment, in the composite powder, the particle diameter of the powders A
Less than 23 μm, the particle diameter of the powder B is less than 23 μm；It is highly preferred that the granularity D50 of the powders A is controlled at 10-15 μm, institute
The granularity D50 for stating powder B is controlled at 10-15 μm.
In above-mentioned powder core, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous alloy
Band is made by single-roller rapid quenching with quenching；Preferably, the temperature of the brittle heat treatment for 360~460 DEG C (such as 365 DEG C, 370
DEG C, 380 DEG C, 390 DEG C, 400 DEG C, 410 DEG C, 420 DEG C, 430 DEG C, 440 DEG C, 450 DEG C, 455 DEG C), 0.5~3h of soaking time (ratio
Such as 1h, 1.5h, 2h, 2.5h).
In above-mentioned powder core, as a kind of preferred embodiment, in the composite powder, the Mechanical Crushing processing
Obtain less than 53 μm of amorphous powdered alloy；It is highly preferred that the Mechanical Crushing handles to obtain the granularity D50 of amorphous powdered alloy
Control is at 40-50 μm.
In above-mentioned powder core, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous alloy
Powders A is Fe-Si-B alloys, and its chemical composition is included by atomic percent：Si：6~12at.%, B：8~14at.%, surplus
For Fe.The amorphous powder has been carried out lot-size production at present, and cost is low.
In above-mentioned powder core, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous alloy
Powder B chemical composition includes Fe, Cr and at least two metalloid elements, and its chemical composition is included by atomic percent：Cr：0-
5at.%, metalloid element：1-15at.%, surplus Fe；Preferably, the metalloid element is Si, B, P or C.
In above-mentioned powder core, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous alloy
Powder B is prepared by water atomization；Water atomized powder cost is relatively cheap, although the relative aerosolization of its loss is larger,
Account for smaller in composite powder due to atomized powder in the application, therefore the adverse effect is smaller.
In above-mentioned powder core, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous alloy
Powder B is heat-treated, the temperature of the heat treatment for 360~460 DEG C (such as 365 DEG C, 370 DEG C, 380 DEG C, 390 DEG C,
400 DEG C, 410 DEG C, 420 DEG C, 430 DEG C, 440 DEG C, 450 DEG C, 455 DEG C), 1~5h of soaking time (such as 1.5h, 2h, 2.5h, 3h,
3.5h、4h、4.5h).Fe-based amorphous alloy powder B stress can be removed by the heat treatment.
A kind of preparation method of above-mentioned powder core, comprises the following steps：
Coat granulation step, into the composite powder add adhesive bonded, then addition lubricant with
Complete cladding to be granulated, obtain cladding powder；
Compressing step, processing is pressed in the cladding powder, obtains powder core pressed compact；
Heat treatment step, powder core pressed compact is heat-treated.
In the preparation method of above-mentioned powder core, as a kind of preferred embodiment, in the cladding granulation step, adhesive
Any one or a few in epoxy resin, polyimides, phenolic resin, cyanate ester, acrylic resin, waterglass；More
Preferably, the addition of described adhesive for the composite powder quality 0.5~3% (such as 0.6%, 0.8%,
1%th, 1.5%, 2%, 2.5%, 2.8%).It as binder content is too low, may lead to not compressing, too high levels are then
The magnetic property of magnetic core can be had a strong impact on, makes its deterioration.
In the preparation method of above-mentioned powder core, as a kind of preferred embodiment, in the cladding granulation step, the profit
Lubrication prescription is selected from least one of zinc stearate, magnesium stearate, calcium stearate, amide waxe micro mist；It is highly preferred that the lubricant
Addition for the composite powder quality 0.5~3% (such as 0.6%, 0.8%, 1%, 1.5%, 2%, 2.5%,
2.8%).As lubricant quantity is too low, it can cause smoothly be stripped during compacting, reduce die life or mold damage, dosage
It is too high, the magnetic property of magnetic core can be had a strong impact on, makes its deterioration.It is further preferred that the addition of the lubricant is the iron
The 1~2% of base composite powder quality.
The compressing step, it is in room temperature as a kind of preferred embodiment in the preparation method of above-mentioned powder core
Lower compression molding, pressing pressure be 1600~2400MPa (such as 1650MPa, 1800MPa, 1900MPa, 2000MPa,
2100MPa, 2200MPa, 2300MPa, 2350MPa), 1~6s of dwell time (such as 2s, 3s, 4s, 5s).If pressing pressure mistake
Low, then the soft magnet performance of powder core is poor；If pressing pressure is too high, have an impact to the life-span of compacting tool set, and be easily destroyed absolutely
Edge clad.
In the preparation method of above-mentioned powder core, as a kind of preferred embodiment, described in the heat treatment step at heat
The temperature of reason be 360~460 DEG C (such as 365 DEG C, 370 DEG C, 380 DEG C, 390 DEG C, 400 DEG C, 410 DEG C, 420 DEG C, 430 DEG C, 440
DEG C, 450 DEG C, 455 DEG C), 0.5~2h of soaking time (such as 1h, 1.5h).After heat treatment step can eliminate compressing processing
Residual stress, heat treatment temperature is too low or too high, then the soft magnet performance of powder core is poor.
One kind molding inductance, the coil of advance coiling is embedded to using composite powder, adhesive, lubricant as raw material system
It is fabricated after the standby cladding powder formed through being integrally formed；The composite powder, include such as the following group by weight percentage
Point：Fe-based amorphous alloy powders A 70~95% (such as 72%, 75%, 78%, 80%, 85%, 88%, 90%, 92%,
And Fe-based amorphous alloy powder B 5~30% (such as 6%, 8%, 10%, 15%, 18%, 22%, 25%, 28%) 94%)；
Wherein,
The Fe-based amorphous alloy powders A is by the way that iron-based amorphous alloy ribbon material to be carried out to brittle heat treatment successively, machinery is broken
It is prepared by broken processing, air-flow break process；
The Fe-based amorphous alloy powder B is prepared by atomization；
The particle diameter of the powders A be less than or equal to 30 μm (such as 5 μm, 8 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25
μm, 28 μm), the particle diameter of the powder B be less than or equal to 30 μm (such as 5 μm, 8 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm,
25μm、28μm)。
In above-mentioned molding inductance, as a kind of preferred embodiment, in the composite powder, the grain of the powders A
Footpath is less than 23 μm, and the particle diameter of the powder B is less than 23 μm；It is highly preferred that the granularity D50 of the powders A is controlled at 10-15 μm,
The granularity D50 of the powder B is controlled at 10-15 μm.If granularity is excessive, the insulating barrier for being embedded to coil therein is easily destroyed.
In above-mentioned molding inductance, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous conjunction
Gold ribbon material is made by single-roller rapid quenching with quenching；Preferably, the temperature of the brittle heat treatment for 360~460 DEG C (such as 365 DEG C,
370 DEG C, 380 DEG C, 390 DEG C, 400 DEG C, 410 DEG C, 420 DEG C, 430 DEG C, 440 DEG C, 450 DEG C, 455 DEG C), 0.5~3h of soaking time
(such as 1h, 1.5h, 2h, 2.5h).
In above-mentioned molding inductance, as a kind of preferred embodiment, in the composite powder, at the Mechanical Crushing
Reason obtains less than 53 μm of amorphous powdered alloy；It is highly preferred that the Mechanical Crushing handles to obtain the granularity of amorphous powdered alloy
D50 is controlled at 40-50 μm.
In above-mentioned molding inductance, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous conjunction
Golden powders A is Fe-Si-B alloys, and its chemical composition is included by atomic percent：Si：6~12at.%, B：8~14at.%, it is remaining
Measure as Fe.The amorphous powder has been carried out lot-size production at present, and cost is low.
In above-mentioned molding inductance, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous conjunction
Bronze end B chemical composition includes Fe, Cr and at least two metalloid elements, and its chemical composition is included by atomic percent：Cr：
0-5at.%, metalloid element：1-15at.%, surplus Fe；Preferably, the metalloid element is Si, B, P or C.
In above-mentioned molding inductance, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous conjunction
Bronze end B is prepared by water atomization；Water atomized powder cost is relatively cheap, although the relative aerosolization of its loss is larger,
Account for smaller in composite powder due to atomized powder in this application, therefore the adverse effect is smaller.
In above-mentioned molding inductance, as a kind of preferred embodiment, in the composite powder, the Fe-based amorphous conjunction
Bronze end B is heat-treated, the temperature of the heat treatment for 360~460 DEG C (such as 365 DEG C, 370 DEG C, 380 DEG C, 390 DEG C,
400 DEG C, 410 DEG C, 420 DEG C, 430 DEG C, 440 DEG C, 450 DEG C, 455 DEG C), 1~5h of soaking time (such as 1.5h, 2h, 2.5h, 3h,
3.5h、4h、4.5h).Fe-based amorphous alloy powder B stress can be removed by the heat treatment.
A kind of preparation method of above-mentioned molding inductance, comprises the following steps：
Coat granulation step, into the composite powder add adhesive bonded, then addition lubricant with
Complete cladding to be granulated, obtain cladding powder；
Compressing step, the coil of advance coiling is embedded in the cladding powder, processing is pressed, obtains
Inductance pressed compact；
Curing schedule, curing process is carried out to inductance pressed compact, obtains the molding inductance.
In the preparation method of above-mentioned molding inductance, as a kind of preferred embodiment, the cladding is granulated in step, adhesive
Any one or a few in epoxy resin, polyimides, phenolic resin, cyanate ester, acrylic resin, waterglass, more
Preferably, the addition of described adhesive for the composite powder quality 0.5~3% (such as 0.6%, 0.8%,
1%th, 1.5%, 2%, 2.5%, 2.8%).It as binder content is too low, may lead to not compressing, too high levels are then
The magnetic property of magnetic core can be had a strong impact on, makes its deterioration.
In the preparation method of above-mentioned molding inductance, as a kind of preferred embodiment, the cladding is granulated in step, the profit
Lubrication prescription is selected from least one of zinc stearate, magnesium stearate, calcium stearate, amide waxe micro mist, it is highly preferred that the lubricant
Addition for the composite powder quality 0.5~3% (such as 0.6%, 0.8%, 1%, 1.5%, 2%, 2.5%,
2.8%).As lubricant quantity is too low, it can cause smoothly be stripped during compacting, reduce die life or mold damage, dosage
It is too high, the magnetic property of magnetic core can be had a strong impact on, makes its deterioration.
In the preparation method of above-mentioned molding inductance, as a kind of preferred embodiment, the compressing step, compacting pressure
Power is 500-1800MPa (such as 550MPa, 750MPa, 950MPa, 1150MPa, 1350MPa, 1550MPa, 1750MPa), is protected
Press time 0.5-3s (such as 0.6s, 1.2s, 1.8s, 2.4s).When being molded inductance compacting, line is first embedded into composite powder
Circle, therefore pressing pressure is unsuitable excessive, is insulated in order to avoid avoiding damage to coil such as copper cash；, can not be into if pressing pressure is too low
Shape.
In the preparation method of above-mentioned molding inductance, as a kind of preferred embodiment, in the curing schedule, exist first
Under 60-100 DEG C (such as 62 DEG C, 65 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 95 DEG C, 98 DEG C) be incubated 0.5-2h (such as 0.8h, 1h,
1.5h, 1.8h), then 110-210 DEG C (such as 112 DEG C, 115 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170
DEG C, 180 DEG C, 190 DEG C, 200 DEG C, 205 DEG C) under be incubated 1-3h (such as 1.2h, 1.5h, 2h, 2.5h, 2.8h).It is solid in the application
Change step and be allocated as two steps and carry out in other words under two temperature ranges, be because settling easy blunt temperature at one go, and then cause excessively solid
Change and destroy properties of product, curing schedule is preferably arranged to above-mentioned two sections of solidifications in the application, can make it that temperature is relatively stable.
It is as follows the reasons why the compositional selecting of composite powder in the present invention：Single soft magnetic powder all has certain
Deficiency, and composite powder then can integrate every powder a little, the deficiency in the presence of completion oneself is single.In the present invention, iron-based
Amorphous atomized alloy powder is that powder B adds as filler, the shaping of powder more conducively in pressing process so that the compacting of powder
Density is effectively increased, and improves the mechanical strength of powder；Composite powder after Overheating Treatment, loss can be than single A
Powder is lower, and caloric value when magnetic core is used as inductance can also decrease.B content of powder should be limited to 5~30%, and content is too low
The effect of due raising magnetic property is not had then；Too high levels can then cause the magnetic property of composite powder might as well single A
Powder.The particle diameter of powders A and powder B is limited to less than or equal to the 30 μm raisings for being advantageous to powder core pressed density, such as fruit powder
The excessively thick pressed density in end can relatively low bulk strength can decline；Powder diameter is then better less than 23 μm.Alloy powder A's and B
Acquisition methods can produce considerable influence for the performance of magnetic core pressing result and molding inductance, for example, handled by Mechanical Crushing and
Air-flow break process prepares alloy powder A, can obtain preferable powder morphology, and if using single ball grinding method system
Standby alloy powder A, the pattern effect that ball milling comes out powder is poor, can influence magnetic core pressing result.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) powder core molding inductance provided by the invention has lower loss, can effectively reduce inductance temperature rise；
(2) powder core provided by the invention and molding inductance, using the composite powder of particular formulation as raw material, phase
Than in the amorphous powder of single component, pressed density is higher, and mechanical property is more preferably；
(3) present invention uses composite powder of the raw material for particular formulation, and the powders A is mutually tied using a variety of crushing process
The method of conjunction, technological process is simple, can obtain the powder morphology specified, using atomized powder B as filling, the magnetic of preparation
Core soft magnet performance is preferable, and the molding inductance temperature rise of preparation is relatively low；
(4) composite powder bulk is powders A, itself is the Fe-based amorphous 1K101 bands of large-scale production,
Powder core and molding inductance prepared by the composite powder that the present invention refers to is easier mass production, compared to common on the market
Iron silicochromium is molded inductance, and cost is lower.
Brief description of the drawings
Fig. 1 is Fe-based amorphous alloy powder B shape appearance figure；
Fig. 2 is the shape appearance figure of Fe-based amorphous alloy powders A；
Fig. 3 is the temperature rise saturation plot of molding inductance prepared by embodiment 2；
Fig. 4 is the temperature rise saturation plot of molding inductance prepared by embodiment 1；
Fig. 5 is the temperature rise saturation plot of molding inductance prepared by embodiment 3；
Fig. 6 is the temperature rise saturation plot of molding inductance prepared by embodiment 4.
Embodiment
Present disclosure will be described in further detail by embodiment combination accompanying drawing below, protection of the invention
Scope is including but not limited to following embodiments.
Unreceipted specific experiment step or condition in embodiment, according to the conventional steps described by document in the art
Operation or condition can carry out.The various reagents and raw material used in embodiment are commercially available prod.
Embodiment 1-4
(1) preparation of Fe-based amorphous alloy powders A：
A) brittle heat treatment：Choose Fe base noncrystal alloy strips (at.%, Fe made from single-roller rapid quenching with quenching78Si9B11), and
It is heat-treated, heat treatment temperature selects 420 DEG C, soaking time 60min；
B) crush：To through step (a)) obtained Fe base noncrystal alloys strip carries out machinery mill to obtain below 53 μm of particle diameter
Amorphous powdered alloy, granularity D50 control at 42 μm；
C) fine：Airflow milling is carried out to obtain below 23 μm of particle diameter to the amorphous powdered alloy obtained through step (b)
Ultrafine amorphous alloy powder, granularity D50 are controlled at 14 μm, i.e. Fe-based amorphous alloy powders A, referring to Fig. 2；
(2) Fe-based amorphous alloy powder B preparation：Choose the water atomization amorphous powder below 23 μm of particle diameter
(Fe72.5Cr2.5Si11B11C3, element subscript numeral expression a.t.%), granularity D50 is controlled at 13 μm, as Fe-based amorphous alloy
Powder B, referring to Fig. 1；Standby after being heat-treated, heat treatment temperature is 440 DEG C, soaking time 120min；
(3) mix：The iron-based that set granularity is mixed into by Fe-based amorphous alloy powders A and Fe-based amorphous alloy powder B is answered
Close powder；Wherein, Fe-based amorphous alloy powder B part by weight is respectively in the composite powder of embodiment 1,2,3,4
5%th, 10%, 20% and 30%, correspondingly, the part by weight of Fe-based amorphous alloy powders A is respectively 95%, 90%, 80%
And 70%；
(4) cladding is granulated：It is iron-based composite powder that weight is added in the four kinds of composite powders obtained respectively to step (3)
The adhesive phenolic resin of the 2% of last weight carries out binder-treatment, finally adds weight as the 0.6% of composite powder weight
Lubricant stearic acid zinc with complete cladding be granulated；
(5) compression molding：Tentatively judge powder physical property by being made into powder core, it is compound after being granulated by coating
Compression molding obtains pressed compact, pressing pressure 2000MPa, dwell time 3s, the size of annular powder core pressed compact to powder at room temperature
It is external diameter OD=22.9mm, internal diameter ID=14.1mm, height h=7.6mm；
(6) it is heat-treated：Destressing heat treatment is carried out to pressed compact, heat treatment temperature selects 430 DEG C, soaking time 30min, most
Powder core is obtained eventually.
Following performance test is carried out to powder core manufactured in the present embodiment：Loss test, magnetic core primary is around 28 circle copper cash, line
Footpath 0.4mm, secondary is around 3 circles, line footpath 0.4mm；Inductance perme is tested, the circle copper cash of magnetic core coiling 28, line footpath 0.4mm, according to survey
Examination gained inductance, passes through inductance perme --- obtained by the conversion of inductance reduction formula；DC performance test be when testing inductance,
External dc electric current 16.1A (H=100Oe), records secondary inductance, and the ratio of the inductance value and foregoing inductance value is galvanic
Energy；Tensile strength is then directly tested on universal tensile machine, value of thrust when record powder core is broken.
The physical performance data of the powder core is see table 1, from this table it can be seen that increasing with powder B addition
Add, the pressed density of powder core is also increasing.From the point of view of the variation tendency of magnetic conductivity, fine powder is powder B addition during beginning, powder core
Magnetic conductivity is in downward trend, and value 58 is minimized at present in 10wt.%, and with the increase of pressed density, later stage magnetic conductivity is in
The trend being slowly increased.The Strength Changes of powder core and the change contrast of magnetic conductivity.
The physical property of powder core prepared by the embodiment 1-4 of table 1
To reach the purpose of the performance of final evaluation composite powder, present above-mentioned four kinds of cladding powder (i.e. embodiments
Cladding composite powder prepared by 1-4) 2.5 circle flatwise coils of middle embedment, 3s shapings are suppressed under 600MPa pressure, after shaping
Curing process is carried out again, and condition is：80 DEG C of insulation 1h, 120 DEG C of insulation 1h, finally give molding inductance sample, inductor size is
10mm square, high 4mm.The temperature rise saturation curve of molding inductance prepared by embodiment 2 is shown in Fig. 3, as can be seen from the figure with
The increase of electric current, be molded inductance inductance value decay it is slower, in 30A, inductance value is reduced to 0.35 μ H by 0.45 initial μ H.It is real
Apply the temperature rise saturation curve of molding inductance prepared by example 1, embodiment 3, embodiment 4 and see Fig. 4, Fig. 5, Fig. 6 respectively, can be with from figure
4 three groups of embodiment 1, embodiment 3, embodiment molding inductance are found out with the increase of electric current, and under 30A, inductance value difference is near
0.33μH、0.31μH、0.30μH。
Comparative example 1
In addition to Fe-based amorphous alloy powder B is not added, other preparation technologies are same as Example 2.This comparative example is made
Powder core physical performance data see table 2, from the table it can be seen that the pressed density of powder core prepared by embodiment 2,
It is prepared by the broken Fe-based amorphous alloy powder of single use that DC performance, intensity, which will be more than powder core prepared by this comparative example,
The corresponding index of powder core, and be lost lower.
The physical property of powder core prepared by the embodiment 2 of table 2 and comparative example 1 compares
Comparative example 1 is obtained by composite powder using the method for embodiment 2 molding inductance is made, the molding inductance is with electric current
Increase, be molded inductance inductance value decay, in 30A, inductance value is reduced to 0.31 μ H by 0.45 initial μ H, and temperature is by 20 DEG C
(room temperature) is increased to 95 DEG C.
Comparative example 2
In addition to Fe-based amorphous alloy powders A is not added, other preparation technologies are same as Example 2.This comparative example is made
Powder core physical performance data see table 3, from the table it can be seen that the pressed density of powder core prepared by embodiment 2,
It is that single use is atomized obtained Fe-based amorphous alloy powder system that DC performance, intensity, which will be more than powder core prepared by comparative example 2,
The corresponding index of standby powder core, and be lost lower.
The physical property of powder core prepared by the embodiment 2 of table 3 and comparative example 2 compares
Comparative example 3
In this comparative example, with the composite powder in the common hydroxy iron powder alternate embodiment 2 of selection in the market, as
Contrast, particle diameter is controlled after hydroxy iron powder screening below 23 μm；Destressing heat treatment system is from optimal insulation temperature corresponding to it
750 DEG C and soaking time 60min of degree；Other preparation technologies are same as Example 2.Powder core made from this comparative example it is physical
Energy data are see table 4, although from this table it can be seen that the pressed density and intensity of powder core prepared by embodiment 2 are less than
Powder core prepared by this comparative example is using the corresponding index of the powder core of iron carbonyl powder preparation, but magnetic prepared by embodiment 2
The loss of powder core is lower, and DC performance is more preferable.
The physical property of powder core prepared by the embodiment 2 of table 4 and comparative example 3 compares
Comparative example 4
In this comparative example, with iron silicochromium powder (at.%, the Fe that selection in the market is common90Si5.5Cr4.5) alternate embodiment 2
In composite powder, control particle diameter as a comparison, after iron silicochromium dressing sieve point below 23 μm；Destressing heat treatment system is selected
With its corresponding most preferably 550 DEG C of holding temperature and soaking time 90min；Other preparation technologies are same as Example 2.This comparative example
The physical performance data of obtained powder core is see table 5, although from this table it can be seen that powder core prepared by embodiment 2
The corresponding index for the powder core that the powder core that pressed density and intensity are less than the preparation of this comparative example is prepared using iron silicochromium powder,
But the loss of powder core prepared by embodiment 2 is lower, and DC performance is more preferable.
The physical property of powder core prepared by the embodiment 2 of table 5 and comparative example 4 compares
Embodiment 5-6
Embodiment 5-6 in addition to the adhesive addition of addition is different from embodiment 2, other preparation technologies all with embodiment 2
Identical, specific composition and properties of product are shown in Table 6.
Table 6
Embodiment 7-8
Embodiment 7-8 in addition to the compressing resolving system of powder core is different from embodiment 2, other preparation technologies all with implementation
Example 2 is identical, and specific composition and properties of product are shown in Table 7.
Table 7
Embodiment 9-10
Embodiment 9-10 in addition to powder core annealing system is different from embodiment 2, other preparation technologies all with implementation
Example 2 is identical, and specific composition and properties of product are shown in Table 8.
Table 8
Claims (10)
1. a kind of powder core, it is characterised in that the powder core is used using composite powder, adhesive, lubricant as raw material
The cladding powder being prepared, it is pressed successively, is heat-treated and is fabricated；The composite powder, by weight hundred
Divide than including following component：Fe-based amorphous alloy powders A 70~95% and Fe-based amorphous alloy powder B 5~30%；Wherein,
The Fe-based amorphous alloy powders A is by iron-based amorphous alloy ribbon material to be carried out to brittle heat treatment successively, at Mechanical Crushing
It is prepared by reason, air-flow break process；
The Fe-based amorphous alloy powder B is prepared by atomization；
The particle diameter of the powders A is less than or equal to 30 μm, and the particle diameter of the powder B is less than or equal to 30 μm.
2. powder core according to claim 1, it is characterised in that in the composite powder, the particle diameter of the powders A is small
In 23 μm, the particle diameter of the powder B is less than 23 μm；Preferably, the granularity D50 of the powders A is controlled at 10-15 μm, the powder
Last B granularity D50 is controlled at 10-15 μm；
Preferably, the Fe-based amorphous alloy powders A is Fe-Si-B alloys, and its chemical composition is included by atomic percent：Si：6
~12at.%, B：8~14at.%, surplus Fe；
The chemical composition of the Fe-based amorphous alloy powder B includes Fe, Cr and at least two metalloid elements, and its chemical composition is pressed
Atomic percent includes：Cr：0-5at.%, metalloid element：1-15at.%, surplus Fe；Preferably, the metalloid member
Element is Si, B, P or C.
3. powder core according to claim 1 or claim 2, it is characterised in that in the composite powder,
The iron-based amorphous alloy ribbon material is made by single-roller rapid quenching with quenching；The temperature of the brittle heat treatment is 360~460 DEG C,
0.5~3h of soaking time；The Mechanical Crushing handles to obtain less than 53 μm of amorphous powdered alloy, it is preferable that the machinery is broken
It is broken to handle the granularity D50 controls for obtaining amorphous powdered alloy at 40-50 μm；
The Fe-based amorphous alloy powder B is prepared by water atomization；Preferably, the Fe-based amorphous alloy powder B is carried out
Heat treatment, the temperature of the heat treatment is 360~460 DEG C, 1~5h of soaking time.
A kind of 4. preparation method of the powder core according to any one of claim 1-3, it is characterised in that the preparation method
Comprise the following steps：
Granulation step is coated, adhesive is added into the composite powder and is bonded, then adds lubricant to complete
Cladding is granulated, and obtains cladding powder；
Compressing step, processing is pressed in the cladding powder, obtains powder core pressed compact；
Heat treatment step, powder core pressed compact is heat-treated.
5. the preparation method of powder core according to claim 4, it is characterised in that
In the cladding granulation step, described adhesive is selected from epoxy resin, polyimides, phenolic resin, cyanate ester, acrylic acid
Any one or a few in resin, waterglass；Preferably, the addition of described adhesive is the composite powder quality
0.5~3%；The lubricant is selected from least one of zinc stearate, magnesium stearate, calcium stearate, amide waxe micro mist；It is excellent
Selection of land, the addition of the lubricant are the 0.5~3% of the composite powder quality；
It is compression molding at room temperature in the compressing step, pressing pressure is 1600~2400MPa, the dwell time 1~
6s；
In the heat treatment step, the temperature of the heat treatment is 360~460 DEG C, 0.5~2h of soaking time.
6. one kind molding inductance, it is characterised in that the molding inductance is that the coil of advance coiling is embedded to iron-based composite powder
It is fabricated after the cladding powder that end, adhesive, lubricant are prepared for raw material through being integrally formed；The iron-based composite powder
End, by weight percentage including following component：Fe-based amorphous alloy powders A 70~95% and Fe-based amorphous alloy powder B 5~
30%；Wherein,
The Fe-based amorphous alloy powders A is by iron-based amorphous alloy ribbon material to be carried out to brittle heat treatment successively, at Mechanical Crushing
It is prepared by reason, air-flow break process；
The Fe-based amorphous alloy powder B is prepared by atomization；
The particle diameter of the powders A is less than or equal to 30 μm, and the particle diameter of the powder B is less than or equal to 30 μm.
7. inductance is molded according to claim 6, it is characterised in that in the composite powder, the particle diameter of the powders A
Less than 23 μm, the particle diameter of the powder B is less than 23 μm；Preferably, the granularity D50 of the powders A is controlled at 10-15 μm, described
Powder B granularity D50 is controlled at 10-15 μm；
Preferably, in the composite powder, the Fe-based amorphous alloy powders A is Fe-Si-B alloys, and its chemical composition is pressed
Atomic percent includes：Si：6~12at.%, B：8~14at.%, surplus Fe；
The chemical composition of the Fe-based amorphous alloy powder B includes Fe, Cr and at least two metalloid elements, and its chemical composition is pressed
Atomic percent includes：Cr：0-5at.%, metalloid element：1-15at.%, surplus Fe；Preferably, the metalloid member
Element is Si, B, P or C.
8. according to the molding inductance of claim 6 or 7, it is characterised in that in the composite powder,
The iron-based amorphous alloy ribbon material is made by single-roller rapid quenching with quenching；The temperature of the brittle heat treatment is 360~460 DEG C,
0.5~3h of soaking time；The Mechanical Crushing handles to obtain less than 53 μm of amorphous powdered alloy, it is preferable that the machinery is broken
It is broken to handle the granularity D50 controls for obtaining amorphous powdered alloy at 40-50 μm；
The Fe-based amorphous alloy powder B is prepared by water atomization, it is preferable that the Fe-based amorphous alloy powder B is carried out
Heat treatment, the temperature of the heat treatment is 360~460 DEG C, 1~5h of soaking time.
A kind of 9. preparation method that inductance is molded as any one of claim 6-8, it is characterised in that the preparation method
Comprise the following steps：
Granulation step is coated, adhesive is added into the composite powder and is bonded, then adds lubricant to complete
Cladding is granulated, and obtains cladding powder；
Compressing step, the coil of advance coiling is embedded in the cladding powder, processing is pressed, obtains inductance
Pressed compact；
Curing schedule, curing process is carried out to the inductance pressed compact, obtains the molding inductance.
10. the preparation method of inductance is molded according to claim 9, it is characterised in that
It is described cladding be granulated step in, adhesive be selected from epoxy resin, polyimides, phenolic resin, cyanate ester, acrylic resin,
Any one or a few in waterglass, it is preferable that the addition of described adhesive is the 0.5 of the composite powder quality
~3%；
The cladding is granulated in step, and the lubricant is in zinc stearate, magnesium stearate, calcium stearate, amide waxe micro mist
It is at least one, it is preferable that the addition of the lubricant is the 0.5~3% of the composite powder quality；
The compressing step, pressing pressure 500-1800MPa, dwell time 0.5-3s；
In the curing schedule, 0.5-2h is incubated at 60-100 DEG C first, is then incubated 1-3h at 110-210 DEG C.
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