CN109148071A - A kind of preparation method of iron silicon materials and 100 iron silica magnetic particle core of μ - Google Patents

A kind of preparation method of iron silicon materials and 100 iron silica magnetic particle core of μ Download PDF

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Publication number
CN109148071A
CN109148071A CN201810872226.9A CN201810872226A CN109148071A CN 109148071 A CN109148071 A CN 109148071A CN 201810872226 A CN201810872226 A CN 201810872226A CN 109148071 A CN109148071 A CN 109148071A
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China
Prior art keywords
powder
magnetic particle
preparation
particle core
alloy
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CN201810872226.9A
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Chinese (zh)
Inventor
沈嘉炜
张尚野
严露
宣云刚
沈晨懂
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Zhejiang East East Keda Magnetoelectric Co Ltd
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Zhejiang East East Keda Magnetoelectric Co Ltd
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Priority to CN201810872226.9A priority Critical patent/CN109148071A/en
Publication of CN109148071A publication Critical patent/CN109148071A/en
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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
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

A kind of preparation method of 100 iron silica magnetic particle core material of μ, this method comprises the following steps: step 1) alloy melting: will smelt in Si and Fe investment electric metal smelting furnace；Step 2) powder processed: step 1) is smelted to obtained alloy and carries out water mist legal system powder, is made annealing treatment after sieving with 100 mesh sieve；Step 3) powder-processed: the powder after annealing being transferred in powder-frying machine and is heated, and 80~180 DEG C of temperature, is slowly added to phosphate aqueous solution into the powder after heating, is continued 20~60min of stir-fry；Expansion drying is carried out to powder later.Lubricant is added into drying powder, stirs evenly, obtains lubrication powder；Step 4) compacting: pressure is 16~24 tons/cm2；Step 5) heat treatment: being passed through inert gas in heat treated furnace, temperature controls between 650 DEG C~900 DEG C, and soaking time is 70~100 minutes；Step 6) coating: paint is coated uniformly on magnetic core surface.

Description

A kind of preparation method of iron silicon materials and 100 iron silica magnetic particle core of μ
Technical field
The present invention relates to field of powder metallurgy, are a kind of preparation methods of 100 iron silica magnetic particle core of magnetic permeability μ.
Background technique
Metal magnetic powder core refers to the eka-gold formed by the ferromagnetic powder and dielectric of micron dimension by compacting Belong to composite material, there is some distributed air gaps between magnetic powder particle.Due to ferromagnetic particle very little, but it is non magnetic Electrical insulating film substance separates, and therefore, on the one hand can completely cut off vortex, material is suitable for upper frequency；On the other hand due to particle Between channel effect, cause material that there is low permeability and permanent permeance；Again since particle size is small, do not occur substantially Collect skin phenomenon, magnetic conductivity is also just relatively stable with the variation of frequency.
Iron silica magnetic particle core is a kind of magnetic core made of the alloy powder of Fe and Si, the saturation with up to 16000 Gausses Magnetic induction intensity, excellent DC bias current characteristic, core loss is lower than ferrocart core, and the problem of without heat ageing, is particularly suitable for Anti-current device under high current, the power inductor of high energy storage, PFC inducer etc..In solar energy, wind energy, hybrid power vapour It is widely used in the new energy fields such as vehicle.
Currently, the producible magnetic conductivity of iron silica magnetic particle core is the μ of 26 μ~90.
Summary of the invention
In order to overcome existing iron silicon magnetic conductivity insufficient, the purpose of the present invention is to provide a kind of 100 iron silica magnetic particle core materials of μ Preparation method；Wherein, iron silica magnetic particle core material is calculated by mass percentage, and the content of Si is 6.2%~6.8%, and surplus is Fe, including alloy melting, powder processed, powder-processed, compacting, heat treatment and coating step
The purpose of the present invention adopts the following technical scheme that realization:
A kind of preparation method of 100 iron silica magnetic particle core material of μ, this method comprises the following steps:
Step 1) alloy melting: it will be smelted in Si and Fe investment electric metal smelting furnace, smelting temperature is 1500 DEG C More than, the time of alloy melting was at 1 hour or more；
Step 2) powder processed: step 1) is smelted to obtained alloy and carries out water mist legal system powder, is carried out at annealing after sieving with 100 mesh sieve Reason；
Step 3) powder-processed: the powder after annealing being transferred in powder-frying machine and is heated, and 80~180 DEG C of temperature, to after heating Powder in be slowly added to phosphate aqueous solution, continue 20~60min of stir-fry.Expansion drying is carried out to powder later.To drying powder Middle addition lubricant, stirs evenly, and obtains lubrication powder.
Step 4) compacting: pressure is 16~24 tons/cm2
Step 5) heat treatment: being passed through inert gas in heat treated furnace, temperature controls between 650 DEG C~900 DEG C, heat preservation Time is 70~100 minutes.
Step 6) coating: paint is coated uniformly on magnetic core surface.
Preferably, the powder processed in the step 2) uses water atomization pulverization, specific operating procedure are as follows: by fusing Aluminium alloy is then injected into tundish.Start to start high-pressure hydraulic pump before aluminium alloy injection, hydraulic atomized device is allowed to start work Make.Aluminium alloy in tundish passes through line, passes through leting slip a remark into atomizer for packet bottom.In the work of the high pressure water from atomizer Under, aluminium alloy is constantly broken into tiny drop, is fallen into the coolant liquid in device, and fast liquid is frozen into alloy powder.
Preferably, phosphoric acid quality is the 0.05% of powder quality in phosphate aqueous solution when powder-processed in the step 3) ~0.28%
Preferably, the pressure suppressed in the step 4) is 20 tons/cm2
Preferably, heat treatment uses nitrogen protection in the step 5), highest impact temperature is 750 ± 20 DEG C, heat preservation Time is 80~90 minutes.
Another object of the present invention is to be to provide the 100 iron silica magnetic particle core material of μ that method described above obtains, In, it is calculated by mass percentage, the content of Si is 6.2%~6.8%, surplus Fe.
The advantages and positive effects of the present invention:
1. preparation process is simple, powder compacting made from water atomization is good, and pressed blank intensity is high, do not have to it is subsequent into Row intensive treatment.
2. present invention reduces the dosage of phosphate aqueous solution, so that product magnetic conductivity can achieve 100 μ after compacting.10kHz When, magnetic permeability μ=100 of powder core, when magnetic field strength H=50Oe, μ % >=41%, unit volume loss loss Pcv (100kHz, 140Gs)≤70mW/cm3。
Specific embodiment
A kind of preparation method of the 100 iron silica magnetic particle core material of μ of embodiment 1, the specific steps are as follows:
Step 1) alloy smelting: will smelt, ingredient Si:6.5% in pure iron, silicon metal investment electric metal smelting furnace, Remaining is Fe；Smelting temperature is about 1500 DEG C, the time 70min of alloy melting；
Step 2) powder processed: water mist legal system powder is directly carried out after alloy melting is good, spraying powder sieves with 100 mesh sieve, after sieving Powder make annealing treatment；
Wherein, the specific steps of water mist legal system powder are as follows: the aluminium alloy of fusing is then injected into tundish.It is infused in aluminium alloy Start to start high-pressure hydraulic pump before entering, hydraulic atomized device is allowed to start to work.Aluminium alloy in tundish passes through line, passes through packet It lets slip a remark into atomizer at bottom.Under the action of the high pressure water from atomizer, aluminium alloy is constantly broken into tiny liquid Drop, falls into the coolant liquid in device, fast liquid is frozen into alloy powder.
Step 3) powder-processed: the powder after annealing being transferred in powder-frying machine and is heated, and 80~180 DEG C of temperature, to after heating Powder in be slowly added to the phosphate aqueous solution being configured to by the phosphoric acid of powder quality 0.05%~0.28%, continue stir-fry 20~ 60min；Expansion drying is carried out to powder later；Lubricant is added into drying powder, stirs evenly, obtains lubrication powder.
Step 4) compacting: by lubrication powder investment(i.e. outer diameter be 26.9mm, internal diameter 14.7mm, With a thickness of the ring-shaped magnetic core of 11.2mm) mold in 20 tons/cm2Pressure compression moulding；
Step 5) heat treatment: being passed through inert gas in heat treated furnace, temperature controls between 650 DEG C~900 DEG C, heat preservation Time is 70~100 minutes, is heat-treated destressing；
Step 6) coating: magnetic core finally is obtained with epoxy resin coating magnetic core surface；
Test example
The magnetic core that embodiment 1 is obtained carries out electrical characteristics test:
Obtained magnetic core and electrical characteristic are as follows:
(1): magnetic conductivity:
1. magnetic core is in 1kHz, magnetic permeability μ=98.4 of powder core；(Test equipment: TH2829C)
2. magnetic core is in 10kHz, magnetic permeability μ=98.2 of powder core；(Test equipment: TH2829C)
3. magnetic core is in 100kHz, magnetic permeability μ=97.4 of powder core；(Test equipment: TH2829C)
(2): DC superposition characteristic:
1. magnetic core is in 10kHz, magnetic field H=50Oe, μ %=54.1% (Test equipment: CH1320SCH3302)
2. magnetic core is in 10kHz, magnetic field H=100Oe, μ %=33.0% (Test equipment: CH1320SCH3302)
3. magnetic core is in 10kHz, magnetic field H=150Oe, μ %=22.7% (Test equipment: CH1320SCH3302)
4. magnetic core is in 10kHz, magnetic field H=200Oe, μ %=16.9% (Test equipment: CH1320SCH3302)
(3): Pcv characteristic is lost in magnetic core unit volume:
For magnetic core in 100kHz, 140Gs, Pcv=29.6mW/cm is lost in unit volume3(Test Instrument: B-H ANALYZER SY-8219).

Claims (6)

1. a kind of preparation method of 100 iron silica magnetic particle core material of μ, this method comprises the following steps:
Step 1) alloy melting: will smelt in Si and Fe investment electric metal smelting furnace, and smelting temperature is 1500 DEG C or more, The time of alloy melting was at 1 hour or more；
Step 2) powder processed: step 1) is smelted to obtained alloy and carries out water mist legal system powder, is made annealing treatment after sieving with 100 mesh sieve；
Step 3) powder-processed: the powder after annealing being transferred in powder-frying machine and is heated, and 80~180 DEG C of temperature, to the powder after heating It is slowly added to phosphate aqueous solution in material, continues 20~60min of stir-fry.Expansion drying is carried out to powder later.Add into drying powder Enter lubricant, stir evenly, obtains lubrication powder；
Step 4) compacting: pressure is 16~24 tons/cm2；
Step 5) heat treatment: being passed through inert gas in heat treated furnace, temperature controls the soaking time between 650 DEG C~900 DEG C It is 70~100 minutes；
Step 6) coating: paint is coated uniformly on magnetic core surface.
2. the preparation method of 100 iron silica magnetic particle core material of μ according to claim 1, it is characterised in that: in the step 2) Powder processed use water atomization pulverization, specific operating procedure are as follows: the aluminium alloy of fusing is then injected into tundish.In alloy Start to start high-pressure hydraulic pump before liquid injection, hydraulic atomized device is allowed to start to work；Aluminium alloy in tundish passes through line, leads to Packet bottom is crossed to let slip a remark into atomizer；Under the action of the high pressure water from atomizer, aluminium alloy is constantly broken into tiny Drop, fall into the coolant liquid in device, fast liquid is frozen into alloy powder.
3. the preparation method of 100 iron silica magnetic particle core material of μ according to claim 1, it is characterised in that: in the step 3) Phosphoric acid quality is the 0.05%~0.28% of powder quality in phosphate aqueous solution when powder-processed.
4. the preparation method of 100 iron silica magnetic particle core material of μ according to claim 1, it is characterised in that: in the step 4) The pressure of compacting is 20 tons/cm2。
5. the preparation method of 100 iron silica magnetic particle core material of μ according to claim 1, it is characterised in that: in the step 5) Heat treatment uses nitrogen protection, and highest impact temperature is 750 ± 20 DEG C, and soaking time is 80~90 minutes.
6. the 100 iron silica magnetic particle core material of μ that method according to claims 1 to 5 is prepared, wherein by mass percentage It calculates, the content of Si is 6.2%~6.8%, surplus Fe.
CN201810872226.9A 2018-08-02 2018-08-02 A kind of preparation method of iron silicon materials and 100 iron silica magnetic particle core of μ Pending CN109148071A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956011A (en) * 1990-01-17 1990-09-11 Nippon Steel Corporation Iron-silicon alloy powder magnetic cores and method of manufacturing the same
CN101105999A (en) * 2006-07-06 2008-01-16 株式会社日立制作所 Magnetic power, method for manufacturing moulding powder and moulding powder
CN102623121A (en) * 2012-04-05 2012-08-01 天通控股股份有限公司 Method for manufacturing iron-silicon material and Mu-90 iron-silicon magnetic powder core

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956011A (en) * 1990-01-17 1990-09-11 Nippon Steel Corporation Iron-silicon alloy powder magnetic cores and method of manufacturing the same
CN101105999A (en) * 2006-07-06 2008-01-16 株式会社日立制作所 Magnetic power, method for manufacturing moulding powder and moulding powder
CN102623121A (en) * 2012-04-05 2012-08-01 天通控股股份有限公司 Method for manufacturing iron-silicon material and Mu-90 iron-silicon magnetic powder core

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
柏海明: "粉末形貌及粒度对铁硅磁粉心性能的影响", 《磁性材料与器件》 *

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Application publication date: 20190104