CN109285685A - A kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core - Google Patents
A kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core Download PDFInfo
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- CN109285685A CN109285685A CN201810726383.9A CN201810726383A CN109285685A CN 109285685 A CN109285685 A CN 109285685A CN 201810726383 A CN201810726383 A CN 201810726383A CN 109285685 A CN109285685 A CN 109285685A
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- 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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- 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
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
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- 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
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- 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
- B22F1/14—Treatment of metallic powder
- B22F1/142—Thermal or thermo-mechanical treatment
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- 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
- B22F1/14—Treatment of metallic powder
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
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- 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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
- C23C22/368—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates containing magnesium cations
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Abstract
The present invention relates to metal soft magnetic material technical fields, disclose a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core.It should be the preparation method comprises the following steps: 1) gas-atomized powder；2) combinations of particle sizes；3) powder is heat-treated；4) insulating wrapped；5) secondary cladding；6) compression moulding；7) magnetic core is annealed；8) impregnation spraying.Aerosolization Fe-Si-Al magnetic core prepared by the present invention has good moldability, the high advantage of magnetic conductivity simultaneously.
Description
Technical field
The present invention relates to metal soft magnetic material technical fields, more particularly, to a kind of high magnetic permeability aerosolization Fe-Si-Al magnetic
The preparation method of core.
Background technique
Iron sial is important one kind in metal magnetic powder core, because its loss is low and at low cost, in electronics industry soft magnetic materials
Middle performer's consequence is all being quicklyd increase along with its application range of New Energy Industry and usage amount；Because of iron
Silico-aluminum enbrittles therefore can be easily made powder, starts with the iron sial that crush method is prepared for sheet from u s company's invention
Powder, then through insulating wrapped, form, prepare by annealing powder core.The domestic preparation method master to aerosolization Fe-Si-Al magnetic core at present
Crush method is used, such as China Patent Publication No. is that CN101226804 discloses a kind of iron silica magnetic particle of magnetic permeability μ=125
The manufacturing method of core, the powder size selected are -150 mesh, and formability is preferable, and the thick magnetic conductivity of powder is easily high, but are superimposed and damage
It is cumbersome to consume the poor and technique；China Patent Publication No. is that CN101599334 discloses a kind of high resistivity high magnetic permeability iron silicon
The preparation method of soft magnetic materials, the broken iron aluminum silicon powder of tradition are added expensive 1~10wt%Ni powder, adjust positive silicon with ammonium hydroxide
For acetoacetic ester in iron sial powder one layer of SiO2 insulating film of external sheath, the method condition at high cost is harsh.Along with powder metallurgy
The development of technology occurred preparing iron sial spherical powder, the iron that new process is prepared with gas atomization before and after 2015 in the market
Sial powder has lower loss, higher superposition saturated characteristic and good frequency characteristic.But spherical iron aluminum silicon powder is brought
The problem of be that mouldability is poor, therefore insulating wrapped when increase the amount of insulating compound and bonding agent and improve being molded into for powder
Type, and the increase of covering amount can bring the decline of inductance value；It therefore is mainly in the market magnetic permeability μ for aerosolization iron sial product
26 and magnetic conductivity be μ 60 90 product of product and a small amount of magnetic permeability μ, and 90 or more aerosolization iron sial product of magnetic permeability μ is seldom
It sees on the market.Current electronic technology is fast-developing, and end product constantly develops to miniaturization, high power direction, to magnetic powder
The characteristic requirements of core powder are more and more diversified, therefore the aerosolization Fe-Si-Al magnetic core certainty R&D direction of high magnetic permeability.
Summary of the invention
The present invention be Fe-Si-Al magnetic core mouldability in order to overcome prior art aeroponics to prepare and both magnetic conductivities no
The problem of capable of obtaining optimization simultaneously, the present invention provides a kind of good moldability, the high aerosolization Fe-Si-Al magnetic core of magnetic conductivity
Preparation method.
To achieve the goals above, the invention adopts the following technical scheme: a kind of high magnetic permeability aerosolization Fe-Si-Al magnetic
The preparation method of core, comprising the following steps:
1) gas-atomized powder: raw material aluminium ingot, ferrosilicon and iron are placed in melting in vacuum high-frequency induction furnace, then through atomization plant
Tundish carries out powder by atomization under nitrogen pressure；
2) combinations of particle sizes: powder by particle size prepared by step 1) is sieved, then carries out combinations of particle sizes；
3) powder is heat-treated: by powder in step 2) in H21~6h of heat treatment is carried out in atmosphere, heat treatment temperature control control is 750
~850 DEG C, obtain iron sial powder；
4) insulating wrapped: being put into 10~30min of mixing in aluminium alloy non-chromium passivator solution for iron sial powder obtained,
4~8h is dried after taking-up at room temperature, is put into high temperature oven and is dried, opens baking oven by powder furnace cooling；
5) secondary cladding: first with the dilution of 8~10wt% acetone there is 0.3~0.5wt% organic siliconresin of superelevation bonding to obtain
Then mixed liquor is added in step 4) and stirs 30~40min in the iron sial powder of insulating wrapped by mixed liquor, take out powder and exist
6h or more is dried under room temperature, crosses 60~80 mesh screens；
6) it compression moulding: after 0.3~0.5wt% high temperature remover is added in above-mentioned powder, stirs evenly and is formed to obtain magnetic
Core, briquetting pressure are 1600~1800MPa；
7) magnetic core anneal: magnetic core after molding is placed in atmosphere of inert gases and is made annealing treatment, annealing temperature be 750~
800 DEG C, annealing time is 120~150min；
8) impregnation spraying: powder core obtained above being added in the impregnation solution of epoxy resin and phenolic resin, and immersion 5~
It removes and cleans after 15min, then toasted at 120~160 DEG C, finally carry out paint spraying or powder spray.
Present invention preparation alloy powder cladding process is simple, selects 200 mesh iron sial original powder of ﹣, and agents useful for same type only needs
Four kinds: a kind of insulating compound (aluminium alloy non-chromium passivator), a kind of bonding agent (silicone resin), a kind of release agent (high temperature resistant type), diluent
1 kind (acetone).Lead to common waterglass, ethyl orthosilicate and phosphating solution in industry and cook insulating compound, adds kaolin, mica
The inorganic insulations powder such as powder, zirconium oxide or silica；Because inorganic powder is difficult to mix with alloy powder, therefore often select 1000 mesh
Above ultra-fine inorganic powder (higher cost)；This patent is firstly introduced into aluminium alloy non-chromium passivator substitution insulating compound above and nothing
Machine powder, this passivator wetability is preferable, therefore uniformly can rapidly be coated on aerosolization iron sial powder once being mixed
Surface, then through low temperature drying formed uniformly, high adhesion force, high-temperature insulation film, therefore can not add non-magnetic material without
Machine insulating compound reduces magnetic core breath, improves magnetic conductivity, magnetic permeability μ prepared by the present invention up to 125,；Cooperate again modified
Superelevation adhesion properties organic siliconresin substitutes the epoxy resin and phenolic resin in industry, improves the mouldability and flowing of powder
Property, briquetting pressure is reduced, obtained Fe-Si-Al magnetic core mouldability is preferable；This programme is using heatproof up to 800 DEG C or more of demoulding
Agent replaces common stearic acid release agent, this high-temperature mold lubricant in industry that magnetic core heat treatment temperature can be improved.
Preferably, raw material includes the ingredient of following weight percent proportion in the step 1): aluminium ingot 5.2~
5.8wt%, 10.7~12.8wt% of ferrosilicon, surplus are iron.
Preferably, nitrogen pressure is 1.8~3.6MPa in the step 1).
Preferably, powder size combines in the step 2) are as follows: 200~+300 mesh of ﹣, 300~+400 mesh of ﹣, 400 mesh of ﹣
Hereinafter, the mass ratio of 200~+300 mesh of ﹣, 300~+400 mesh of ﹣, the following particle size powders of 400 mesh of ﹣ are as follows: 1~5:1~5:10~18.
Preferably, the weight of organic siliconresin is the 0.4 of the iron sial powder weight of insulating wrapped in the step 5)
~0.6%, the weight of mixed liquor is the 8%~10% of the iron sial powder weight of insulating wrapped.
Preferably, the organic siliconresin is poly- alkyl organic resin, poly- aryl organic siliconresin, polyoxyethylene alkyl aryl base
One of organic siliconresin, silicone modified acrylic resin, silicone alkyd, organic silicon polyester resin are a variety of.
Preferably, the high-temperature mold lubricant main component is silicon systems release agent, fluorine system releasing agent, wax system release agent, table
The mixing of face activating agent system release agent one or two.
Therefore, the invention has the following beneficial effects: (1), present invention introduces aluminium alloy non-chromium passivator to substitute above exhausted
Edge agent and inorganic powder, this passivator wetability is preferable, therefore uniformly can rapidly be coated on aerosolization iron once being mixed
Sial powder surface, then uniform, high adhesion force, high-temperature insulation film are formed through low temperature drying, therefore can not add non-magnetic
Property Materials Inorganic insulating compound, reduce magnetic core breath, improve magnetic conductivity；(2) using superelevation adhesion properties organic siliconresin substitution row
Epoxy resin and phenolic resin in the industry improve the mouldability and mobility of powder, reduce briquetting pressure, obtained iron sial magnetic
Powder core mouldability is preferable.
Specific embodiment
Below by specific embodiment, technical scheme is described further.
In the present invention, if not refering in particular to, used raw material and equipment etc. are commercially available or commonly used in the art,
Method in embodiment is unless otherwise instructed the conventional method of this field.
Embodiment 1
The raw material that total weight is 200kg is weighed, wherein the ferrosilicon ingot of the aluminium ingot of 10.8kg, 25.6kg, surplus are iron, wherein ferrosilicon
Silicone content is 75wt% in ingot, is placed in vacuum high-frequency induction furnace and carries out melting, after to be melted, removes removing dross；By atomization plant
Tundish pressure selects 2.5MPa pressure nitrogen gas to carry out powder by atomization；Powder is sieved, then carries out combinations of particle sizes, powder grain
Degree is distributed as 200~+300 mesh of ﹣, 300~+400 mesh of ﹣, 400 mesh of ﹣ hereinafter, three's weight ratio is 2:3:15；It will be mixed
Powder is placed in H2Heat treatment 1.5 hours is carried out under atmosphere protection, heat treatment temperature is 800 DEG C；Powder after taking heat treatment
20kg and 1kg aluminium alloy non-chromium passivator solution are mixed, and mixing time 25 minutes, dry at room temperature after taking-up 4 hours,
And be placed in baking oven, shakeouing area is 2 square meters, and temperature is raised to 95 DEG C first and keeps the temperature 1 hour, then to rise to 160 DEG C of bakings 2 small
When, baking oven is opened by powder furnace cooling；The processing of secondary insulating cladding is carried out after cooling, first with 1.6kg acetone dilution 0.6kg's
Poly- alkyl organic resin is stirred 10 minutes, is then allowed to stand 30 minutes and is obtained mixed liquor, and cooling iron silicon is added in mixed liquor
30min is stirred in aluminium powder material, taking-up shakeouts 2 square meters and dries 6h, crosses 60 mesh screens；Powder after secondary cladding is added
0.08kg high temperature silicon systems release agent, which stirs, mixes its mixing, takes powder to be pressed, briquetting pressure is
1800MPa is pressed into 26.9mm × 14.6mm × 11.2mm magnetic core；Blank magnetic core obtained is placed in N2In middle annealing furnace into
Row annealing, annealing temperature are 760 DEG C, and annealing time is 150 minutes, furnace cooling；Last blank magnetic core by chamfering, impregnation,
Powder coatings obtain finished product magnetic core.
Wherein, aluminium alloy non-chromium passivator includes the raw material of following parts by weight proportion:
4 parts of magnesium fluoride, 1.5 parts of sodium tripolyphosphate, 1.5 parts of fluotitanic acid, 3 parts of prodan, 1 part of hydrochloric acid, vinyl triacetyl oxygen
1 part of base silane, 4 parts of calcium nitrate, 1 part of corrosion inhibiter and 2 parts of chelating agent.
Embodiment 2
The raw material that total weight is 200kg is weighed, wherein the ferrosilicon ingot of the aluminium ingot of 10.4kg, 20.5kg, surplus are iron, wherein ferrosilicon
Silicone content is 90wt% in ingot, is placed in vacuum high-frequency induction furnace and carries out melting, after to be melted, removes removing dross；By atomization plant
Tundish pressure selects 3MPa pressure nitrogen gas to carry out powder by atomization；Powder is sieved, then carries out combinations of particle sizes, powder size
200~+300 mesh of ﹣, 300~+400 mesh of ﹣, 400 mesh of ﹣ are distributed as hereinafter, three's weight ratio is 1:1:10；By mixed powder
End is placed in H2Heat treatment 3 hours is carried out under atmosphere protection, heat treatment temperature is 760 DEG C；Take heat treatment after powder 20kg with
1.2kg aluminium alloy non-chromium passivator solution is mixed, and mixing time 20 minutes, dries 6 hours after taking-up at room temperature, then
It is placed in baking oven, shakeouing area is 2 square meters, and temperature is raised to 95 DEG C first and keeps the temperature 1 hour, then rises to 180 DEG C and toast 1.5 hours,
Baking oven is opened by powder furnace cooling；The processing of secondary insulating cladding, first gathering with 1.6kg acetone dilution 0.6kg are carried out after cooling
Aryl organic siliconresin is stirred 10 minutes, is then allowed to stand 30 minutes and is obtained mixed liquor, and cooling iron sial is added in mixed liquor
30min is stirred in powder, taking-up shakeouts 2 square meters and dries 6h, crosses 60 mesh screens；0.08kg is added in powder after secondary cladding
High temperature fluorine system releasing agent, which stirs, mixes its mixing, and powder is taken to be pressed, briquetting pressure 1600MPa, compacting
At 26.9mm × 14.6mm × 11.2mm magnetic core；Blank magnetic core obtained is placed in H2It anneals, anneals in middle annealing furnace
Temperature is 780 DEG C, and annealing time is 120 minutes, furnace cooling；Last blank magnetic core is obtained by chamfering, impregnation, powder coatings
Finished product magnetic core.
Wherein, aluminium alloy non-chromium passivator includes the raw material of following parts by weight proportion:
3 parts of magnesium fluoride, 2 parts of sodium tripolyphosphate, 1 part of fluotitanic acid, 5 parts of prodan, 2 parts of hydrochloric acid, vinyl triacetoxy silicon
1 part of alkane, 4 parts of calcium nitrate, 2 parts of corrosion inhibiter and 1 part of chelating agent.
Embodiment 3
The raw material that total weight is 200kg is weighed, wherein the ferrosilicon ingot of the aluminium ingot of 11.6kg, 21.6kg, surplus are iron, wherein ferrosilicon
Silicone content is 95wt% in ingot, is placed in vacuum high-frequency induction furnace and carries out melting, after to be melted, removes removing dross；By atomization plant
Tundish pressure selects 3MPa pressure nitrogen gas to carry out powder by atomization；Powder is sieved, then carries out combinations of particle sizes, powder size
200~+300 mesh of ﹣, 300~+400 mesh of ﹣, 400 mesh of ﹣ are distributed as hereinafter, three's weight ratio is 3:4:13；By mixed powder
End is placed in H2Heat treatment 3 hours is carried out under atmosphere protection, heat treatment temperature is 760 DEG C；Take heat treatment after powder 20kg with
1.2kg aluminium alloy non-chromium passivator solution is mixed, and mixing time 20 minutes, dries 6 hours after taking-up at room temperature, then
It is placed in baking oven, shakeouing area is 2 square meters, and temperature is raised to 95 DEG C first and keeps the temperature 1 hour, then rises to 180 DEG C and toast 1.5 hours,
Baking oven is opened by powder furnace cooling；The processing of secondary insulating cladding, first gathering with 1.6kg acetone dilution 0.6kg are carried out after cooling
Alkylaryl organic siliconresin is stirred 10 minutes, is then allowed to stand 30 minutes and is obtained mixed liquor, and cooling iron is added in mixed liquor
30min is stirred in sial powder, taking-up shakeouts 2 square meters and dries 6h, crosses 60 mesh screens；Powder after secondary cladding is added
0.08kg high temperature wax system's release agent, which stirs, mixes its mixing, takes powder to be pressed, briquetting pressure is
1700MPa is pressed into 26.9mm × 14.6mm × 11.2mm magnetic core；Blank magnetic core obtained is placed in N2In middle annealing furnace into
Row annealing, annealing temperature are 770 DEG C, and annealing time is 120 minutes, furnace cooling；Last blank magnetic core by chamfering, impregnation,
Powder coatings obtain finished product magnetic core.
Wherein, aluminium alloy non-chromium passivator includes the raw material of following parts by weight proportion:
5 parts of magnesium fluoride, 1 part of sodium tripolyphosphate, 1 part of fluotitanic acid, 4 parts of prodan, 3 parts of hydrochloric acid, vinyl triacetoxy silicon
3 parts of alkane, 4 parts of calcium nitrate, 2 parts of corrosion inhibiter and 2 parts of chelating agent.
Embodiment 4
The raw material that total weight is 200kg is weighed, wherein the ferrosilicon ingot of the aluminium ingot of 10.4kg, 20.4kg, surplus are iron, wherein ferrosilicon
Silicone content is 75wt% in ingot, is placed in vacuum high-frequency induction furnace and carries out melting, after to be melted, removes removing dross；By atomization plant
Tundish pressure selects 1.8MPa pressure nitrogen gas to carry out powder by atomization；Powder is sieved, then carries out combinations of particle sizes, powder grain
Degree is distributed as 200~+300 mesh of ﹣, 300~+400 mesh of ﹣, 400 mesh of ﹣ hereinafter, three's weight ratio is 1:1:10；It will be mixed
Powder is placed in H2Heat treatment 1 hour is carried out under atmosphere protection, heat treatment temperature is 750 DEG C；Powder 20kg after taking heat treatment
It is mixed, mixing time 10 minutes, is dried at room temperature after taking-up 4 hours with 1.2kg aluminium alloy non-chromium passivator solution, and
It is placed in baking oven, shakeouing area is 2 square meters, and temperature is raised to 95 DEG C first and keeps the temperature 1 hour, then to rise to 180 DEG C of bakings 1.5 small
When, baking oven is opened by powder furnace cooling；The processing of secondary insulating cladding is carried out after cooling, first with 1.6kg acetone dilution 0.6kg's
Silicone modified acrylic resin is stirred 10 minutes, is then allowed to stand 30 minutes and is obtained mixed liquor, and cooling iron silicon is added in mixed liquor
30min is stirred in aluminium powder material, taking-up shakeouts 2 square meters and dries 7h, crosses 60 mesh screens；Powder after secondary cladding is added
0.08kg high temperature surfactant system's release agent, which stirs, mixes its mixing, takes powder to be pressed, briquetting pressure
For 1600MPa, it is pressed into 26.9mm × 14.6mm × 11.2mm magnetic core；Blank magnetic core obtained is placed in N2In middle annealing furnace
It anneals, annealing temperature is 750 DEG C, and annealing time is 120 minutes, furnace cooling；Last blank magnetic core passes through chamfering, contains
Leaching, powder coatings obtain finished product magnetic core.
Wherein, aluminium alloy non-chromium passivator includes the raw material of following parts by weight proportion:
3 parts of magnesium fluoride, 1 part of sodium tripolyphosphate, 1 part of fluotitanic acid, 2 parts of prodan, 1 part of hydrochloric acid, vinyl triacetoxy silicon
1 part of alkane, 3 parts of calcium nitrate, 1 part of corrosion inhibiter and 1 part of chelating agent.
Embodiment 5
The raw material that total weight is 200kg is weighed, wherein the ferrosilicon ingot of the aluminium ingot of 11.6kg, 25.6kg, surplus are iron, wherein ferrosilicon
Silicone content is 95wt% in ingot, is placed in vacuum high-frequency induction furnace and carries out melting, after to be melted, removes removing dross；By atomization plant
Tundish pressure selects 3.6MPa pressure nitrogen gas to carry out powder by atomization；Powder is sieved, then carries out combinations of particle sizes, powder grain
Degree is distributed as 200~+300 mesh of ﹣, 300~+400 mesh of ﹣, 400 mesh of ﹣ hereinafter, three's weight ratio is 5:5:18；It will be mixed
Powder is placed in H2Heat treatment 6 hours is carried out under atmosphere protection, heat treatment temperature is 850 DEG C；Powder 20kg after taking heat treatment
It is mixed, mixing time 30 minutes, is dried at room temperature after taking-up 8 hours with 1.2kg aluminium alloy non-chromium passivator solution, and
It is placed in baking oven, shakeouing area is 2 square meters, and temperature is raised to 95 DEG C first and keeps the temperature 1 hour, then to rise to 180 DEG C of bakings 1.5 small
When, baking oven is opened by powder furnace cooling；The processing of secondary insulating cladding is carried out after cooling, first with 1.6kg acetone dilution 0.6kg's
Silicone alkyd is stirred 10 minutes, is then allowed to stand 30 minutes and is obtained mixed liquor, and cooling iron sial is added in mixed liquor
40min is stirred in powder, taking-up shakeouts 2 square meters and dries 8h, crosses 80 mesh screens；0.08kg is added in powder after secondary cladding
High temperature silicon systems release agent, which stirs, mixes its mixing, and powder is taken to be pressed, briquetting pressure 1800MPa, compacting
At 26.9mm × 14.6mm × 11.2mm magnetic core；Blank magnetic core obtained is placed in H2It anneals, anneals in middle annealing furnace
Temperature is 800 DEG C, and annealing time is 150 minutes, furnace cooling；Last blank magnetic core is obtained by chamfering, impregnation, powder coatings
Finished product magnetic core.
Wherein, aluminium alloy non-chromium passivator includes the raw material of following parts by weight proportion:
8 parts of magnesium fluoride, 2 parts of sodium tripolyphosphate, 2 parts of fluotitanic acid, 7 parts of prodan, 3 parts of hydrochloric acid, vinyl triacetoxy silicon
3 parts of alkane, 5 parts of calcium nitrate, 2 parts of corrosion inhibiter and 2 parts of chelating agent.
Si-Al magnetic core made of Examples 1 to 3 is tested for the property, the result is as follows:
Note: loss test instrument use rock abnormal 8218,30:5Ts, 25 DEG C
As a result Si-Al magnetic core with higher magnetic conductivity and preferable superposition performance of the present invention by aeroponics preparation are proved.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (9)
1. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core, which comprises the following steps:
1) gas-atomized powder: raw material aluminium ingot, ferrosilicon ingot and iron are placed in melting in vacuum high-frequency induction furnace, then through atomization plant
Tundish carry out powder by atomization under nitrogen pressure；
2) combinations of particle sizes: powder by particle size prepared by step 1) is sieved, then carries out combinations of particle sizes；
3) powder is heat-treated: by powder in step 2 in H2Carry out 1 ~ 6h of heat treatment in atmosphere, heat treatment temperature control control 750 ~
850 DEG C, obtain iron sial powder；
4) insulating wrapped: iron sial powder obtained being added in aluminium alloy non-chromium passivator, 10 ~ 30min be mixed, and is taken out
It dries 4 ~ 8h at room temperature afterwards, is put into high temperature oven and is dried, open baking oven by powder furnace cooling；
5) secondary cladding: first with acetone dilution there is the organic siliconresin of superelevation bonding to obtain mixed liquor, then adds mixed liquor
Enter 30 ~ 40min of stirring in the iron sial powder of insulating wrapped in step 4), take out powder and dry 6h or more at room temperature,
Cross 60 ~ 80 mesh screens；
6) compression moulding: high temperature remover is added to above-mentioned powder, stirs evenly and is pressed to obtain magnetic core, briquetting pressure
For 1600 ~ 1800MPa；
7) magnetic core is annealed: blank magnetic core after molding is placed in atmosphere of inert gases and is made annealing treatment, annealing temperature 750
~ 800 DEG C, annealing time is 120 ~ 150min；
8) powder core obtained above impregnation spraying: is obtained into finished product magnetic core by chamfering, impregnation, powder coatings.
2. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 1, which is characterized in that
Raw material includes the ingredient of following weight percent proportion: 5.2 ~ 5.8 wt % of aluminium ingot in the step 1), and ferrosilicon ingot 10.2~
12.8 wt %, surplus are iron.
3. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 2, which is characterized in that
Silicone content is 75 ~ 95 wt % in the ferrosilicon ingot.
4. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 1, which is characterized in that
Nitrogen pressure is 1.8 ~ 3.6MPa in the step 1).
5. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 1, which is characterized in that
Powder size combines in the step 2 are as follows: 200 ~+300 mesh of ﹣, 300 ~+400 mesh of ﹣, 400 mesh of ﹣ are hereinafter, 200 ~+300 mesh of ﹣, ﹣
The mass ratio of 300 ~+400 mesh, the following particle size powders of 400 mesh of ﹣ are as follows: 1 ~ 5:1 ~ 5:10 ~ 18.
6. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 1, which is characterized in that
Aluminium alloy non-chromium passivator includes the raw material of following parts by weight proportion in the step 4):
3 ~ 8 parts of magnesium fluoride, 1 ~ 2 part of sodium tripolyphosphate, 1 ~ 2 part of fluotitanic acid, 2 ~ 7 parts of prodan, 1 ~ 3 part of hydrochloric acid, vinyl three
1 ~ 3 part of acetoxylsilane, 3 ~ 5 parts of calcium nitrate, 1 ~ 2 part and 1 ~ 2 part of chelating agent of corrosion inhibiter.
7. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 5, which is characterized in that
Organic siliconresin is poly- alkyl organic resin, poly- aryl organic siliconresin, polyoxyethylene alkyl aryl Ji Youjiguishu in the step 5)
One of rouge, silicone modified acrylic resin, silicone alkyd are a variety of.
8. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 1, which is characterized in that
The step 6) high temperature release agent main component is silicon systems release agent, fluorine system releasing agent, wax system release agent, surfactant system
The mixing of release agent one or two.
9. a kind of preparation method of high magnetic permeability aerosolization Fe-Si-Al magnetic core according to claim 1, which is characterized in that
Inert gas is N in the step 7)2Or H2。
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Denomination of invention: A preparation method for high permeability aerosolized iron silicon aluminum magnetic powder core Effective date of registration: 20230522 Granted publication date: 20200320 Pledgee: Dongyang Branch of China Construction Bank Co.,Ltd. Pledgor: HENGDIAN GROUP DMEGC MAGNETICS Co.,Ltd. Registration number: Y2023330000949 |