CN103377786A - Preparation method for iron-silicon-aluminum alloy magnetic powder core - Google Patents
Preparation method for iron-silicon-aluminum alloy magnetic powder core Download PDFInfo
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- CN103377786A CN103377786A CN201310291799XA CN201310291799A CN103377786A CN 103377786 A CN103377786 A CN 103377786A CN 201310291799X A CN201310291799X A CN 201310291799XA CN 201310291799 A CN201310291799 A CN 201310291799A CN 103377786 A CN103377786 A CN 103377786A
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Abstract
The invention discloses a preparation method for an iron-silicon-aluminum alloy magnetic powder core. The preparation method includes steps of 1), preparing iron-silicon-aluminum powder and matching according to particle size; 2), adding insulation coating agent to the matched iron-silicon-aluminum powder prior to being dried; 3), blending the dried powder evenly and subjecting the same to dry pressing into blank samples; 4), subjecting the blank samples to heat preservation for 0.5-3 hours in protective atmosphere prior to air cooling and spraying to obtain target products. The preparation method for the iron-silicon-aluminum alloy magnetic powder core adopting the inorganic insulation adhesive coating process is simple in process and pollution-free to environment, insulating layers are even, the products after annealing are high in tensile strength with no need for solidification, so that production efficiency is improved. Besides, comprehensive performance of the products is good and above the industry standard.
Description
Technical field
The present invention relates to the manufacturing technology field of magnetic bodies, be specifically related to a kind of preparation method of sendust powder core.
Background technology
Common are ferrocart core (Fe), high magnetic flux powder core (Fe-Ni), Fe-Si-Al magnetic core (Fe-Si-Al), iron nickel molybdenum powder core (Fe-Ni-Mo), iron tantnickel powder core (Fe-Si-Ni) and iron silica magnetic particle core (Fe-Si) in the metal soft magnetic powder core.These soft magnetic metal powder cores respectively have advantage, are applied to respectively every field according to the characteristics of performance, price, are mainly used in military field such as iron nickel molybdenum powder core, and ferrocart core and Fe-Si-Al magnetic core are mainly used in the commercial market.
Because the Fe-Si-Al magnetic core cost performance is high, present recently the trend of quick productivity gain.
The patent No. is the manufacture method that the Chinese invention patent of ZL200710157107.7 discloses the Fe-Si-Al magnetic core of a kind of magnetic permeability μ=125, may further comprise the steps: a) get an amount of at a high speed pulverizing of iron aluminum silicon powder, granularity reaches-150～+ 400 purpose meal and accounts for 10～50%, and granularity reaches-400 fine powder and accounts for 5～90%; B) roast and add passivator when reaching 30～80 ℃ to temperature, roast when reaching 200～350 ℃ to temperature and add silicone grease, continue to roast to drying; C) roast the rear lubricant that adds of cooling; D) compressing, pressure: 5～24 tons/cm
2E) heat treatment gets target product.The weak point of this technical scheme is: 1. the processing step of insulating wrapped is many, and operation is loaded down with trivial details; 2. step b) add the organic substance silicone grease, so that prepared target product product ageing resistace is poor; To utilizing the prepared product of this technical scheme to test, find its dc superposition characteristic when 40Oe, effective permeability is magnetic permeability μ and permeability of vacuum μ for the 50%(effective permeability only
0Ratio), at f=50kHz, B
mIron loss P during=1000Gs
CvGreater than 300mW/cm
3, be lower than industry standard, and the tensile strength of product is very low.
Publication number is the manufacture method that the Chinese invention patent of CN101090019 also discloses a kind of high magnetic permeability FeSiAl powder core, comprises the steps: 1) employing vacuum induction furnace smelting FeSiAL alloy flat bloom; 2) with above-mentioned alloy flat bloom through Mechanical Crushing, in the hydrogen atmosphere heat-treatment furnace annealing in process, obtain alloy powder; 3) above-mentioned alloy powder interpolation mica powder, epoxy resin bonding agent, stearic acid remover are processed compression molding; 4) above-mentioned moulded products is put into nitrogen or argon shield atmosphere heat treatment stove is heat-treated, obtain high magnetic permeability FeSiAl powder core.Although the prepared FeSiAl powder core of this technical scheme better performances, its weak point is: the Granularity Distribution that 1. makes is wider, and proportioning is complicated; 2. the product tensile strength after the heat treatment is low, so usually need to flood, solidify processing etc. after heat treatment, has increased production process, has improved production cost, has reduced production efficiency.
Publication number is Unexamined Patent 11-329821 Japan Patent, in the process of preparation Fe-Si-Al magnetic core, although Passivation Treatment adopts oxygen to substitute middle strong acid, but its weak point is: the 1. difficult control of technique, be difficult to form uniform rete, the adhesion of magnetic particle colloid and powder causes product tensile strength to reduce when having reduced the bonding coating, also needs dipping after the heat treatment, solidifies and process; 2. the resinoid bond that uses, dosage is larger, causes the magnetic property of product on the low side.
In sum, mainly there is following technological deficiency in existing Fe-Si-Al magnetic core preparation technology: 1. add organic solvent in preparation process, be unfavorable for environmental protection; Or 2. preparation technology's more complicated, operation is loaded down with trivial details; Or need to be cured processing after the heat treatment of 3. annealing, reduce production efficiency.
Therefore, how providing that a kind of preparation technology is simple, low-cost, high performance Fe-Si-Al magnetic core, is the technical barrier that those skilled in the art need to be resolved hurrily.
Summary of the invention
The invention provides a kind of preparation method of Fe-Si-Al magnetic core, solved prior art products poor performance, high, the ineffective technological deficiency of manufacturing cost.
The technical solution adopted in the present invention is specific as follows:
The preparation method of sendust powder core comprises the steps:
(1) the iron sial powder by following granularity mixes, wherein,-100 orders～+ 200 purpose iron sial powder account for 40～80% ,-400 purpose iron sial powder that 10～30% ,-200 orders of gross mass～+ 400 purpose iron sial powder account for gross mass and account for 10～30% of gross mass;
(2) preparation insulating wrapped liquid, its mass percent component is: 2～5% phosphoric acid, 4～10% inorganic substances particle, 0.1～1% insulating compound, 0.5～2% release agent, all the other are water;
(3) add insulating wrapped liquid in the iron sial powder for preparing and carry out Passivation Treatment, the mass ratio of insulating wrapped liquid and powder is 1:5; Fully stir post-drying;
(4) mixture that step (3) is obtained is at the pressure compacted under of 1200～2500MPa, after the base sample is positioned in the protective atmosphere, in 600～750 ℃ of lower insulations 0.5～3 hour, air cooling, spraying obtains the sendust powder core.
The mass percent component of described inorganic insulation bonded particulate is 30～55%P
2O
5, 34.9～59.9%ZnO, 10～20%B
2O
3, 0.02～20%CuO, 0.02～10%Bi
2O
3, 0.02～10%SrO
5, 0.01～5%Al
2O
3, 0.01～5%Na
2O, 0.01～5%Li
2O
5, 0.01～5%PbO.
The mass percent component of described inorganic insulation bonded particulate is 30～55%P
2O
5, 35～60%ZnO, 10～20%B
2O
3
The granularity of described inorganic insulation bonded particulate is 5～20um.
Described insulating compound is one or more in kaolin, mica powder or the talcum powder.
Described release agent is one or more in zinc stearate, barium stearate, calcium stearate or the molybdenum bisuphide.
The mass percent component of described iron sial powder is: Si9～10%, and Al5～6%, Mn0.1～0.2%, Ti0.3～0.6%, all the other are Fe.
Described protective atmosphere is nitrogen, argon gas or hydrogen.
The beneficial effect that the present invention compared with prior art has:
1. the iron sial powder of the broken gained of tool is thinner, after grain size proportion, passivation, bonding, and easier compacting, the product power consumption P that makes
CvI reaches 245mW/cm
3, D.C. magnetic biasing characteristic μ
Ho=40/ μ
Ho=0〉=56%, performance is higher than industry standard;
2. greatly increase the radially tensile strength of powder core, can reach 36kgf above (industry standard requires more than the general 27kgf), thereby not need to be cured processing, put forward production efficiency;
Description of drawings
Fig. 1 is the power loss industry standard curve chart of the Fe-Si-Al magnetic core of magnetic permeability μ=90 and μ=125;
Fig. 2 is the D.C. magnetic biasing industry standard curve chart of the Fe-Si-Al magnetic core of different magnetic permeabilitys.
Embodiment
Embodiment 1
(1) the iron sial powder by following granularity mixes, and wherein ,-100 orders～+ 200 purpose iron sial powder account for 80% ,-400 purpose iron sial powder that 10% ,-200 orders of gross mass～+ 400 purpose iron sial powder account for quality and account for 10% of gross mass;
(2) preparation insulating wrapped liquid, its mass percent component is: 2% phosphoric acid, 4% inorganic substances particle, 0.1% kaolin, 0.5% zinc stearate, all the other are water;
(3) add insulating wrapped liquid in the iron sial powder for preparing and carry out Passivation Treatment, the mass ratio of insulating wrapped liquid and powder is 1:5; Fully stir post-drying;
(4) mixture that step (3) is obtained is pressed into ring-like base sample (being magnet ring) under the pressure of 1200MPa, the external diameter of magnet ring is 22.90mm, and internal diameter is 14.20mm, and height is 7.60mm.After the base sample is positioned in the nitrogen atmosphere, in 600 ℃ of lower insulations 0.5 hour, air cooling, spraying obtains the sendust powder core.
After testing, associated electrical magnetic parameter such as the table 1 of target product:
Embodiment 2
(1) the iron sial powder by following granularity mixes, and wherein ,-100 orders～+ 200 purpose iron sial powder account for 60% ,-400 purpose iron sial powder that 15% ,-200 orders of gross mass～+ 400 purpose iron sial powder account for quality and account for 25% of gross mass;
(2) preparation insulating wrapped liquid, its mass percent component is: 5% phosphoric acid, 10% inorganic substances particle, 1% mica powder, 2% barium stearate, all the other are water;
(3) add insulating wrapped liquid in the iron sial powder for preparing and carry out Passivation Treatment, the mass ratio of insulating wrapped liquid and powder is 1:5; Fully stir post-drying;
(4) mixture that step (3) is obtained is pressed into ring-like base sample under the pressure of 2500MPa, the external diameter of magnet ring is 22.90mm, and internal diameter is 14.20mm, and height is 7.60mm.After the base sample is positioned in the hydrogen atmosphere, in 750 ℃ of lower insulations 3 hours, air cooling, spraying obtains the sendust powder core.
After testing, associated electrical magnetic parameter such as the table 2 of target product:
Embodiment 3
(1) the iron sial powder by following granularity mixes, and wherein ,-100 orders～+ 200 purpose iron sial powder account for 60% ,-400 purpose iron sial powder that 15% ,-200 orders of gross mass～+ 400 purpose iron sial powder account for quality and account for 25% of gross mass;
(2) preparation insulating wrapped liquid, its mass percent component is: 3% phosphoric acid, 8% inorganic substances particle, 0.1% talcum powder, 1% calcium stearate, all the other are water;
(3) add insulating wrapped liquid in the iron sial powder for preparing and carry out Passivation Treatment, the mass ratio of insulating wrapped liquid and powder is 1:5; Fully stir post-drying;
(4) mixture that step (3) is obtained is pressed into ring-like base sample under the pressure of 1980MPa, the external diameter of magnet ring is 22.90mm, and internal diameter is 14.20mm, and height is 7.60mm.After the base sample is positioned in the argon gas atmosphere, in 700 ℃ of lower insulations 1 hour, air cooling, spraying obtains the sendust powder core.
After testing, associated electrical magnetic parameter such as the table 3 of target product:
Embodiment 4
(1) the iron sial powder by following granularity mixes, and wherein ,-100 orders～+ 200 purpose iron sial powder account for 60% ,-400 purpose iron sial powder that 15% ,-200 orders of gross mass～+ 400 purpose iron sial powder account for quality and account for 25% of gross mass;
(2) preparation insulating wrapped liquid, its mass percent component is: 3% phosphoric acid, 8% inorganic substances particle, 0.1% talcum powder, 1% molybdenum bisuphide, all the other are water;
(3) add insulating wrapped liquid in the iron sial powder for preparing and carry out Passivation Treatment, the mass ratio of insulating wrapped liquid and powder is 1:5; Fully stir post-drying;
(4) mixture that step (3) is obtained is pressed into ring-like base sample under the pressure of 1980MPa, the external diameter of magnet ring is 22.90mm, and internal diameter is 14.20mm, and height is 7.60mm.After the base sample is positioned in the argon gas atmosphere, in 700 ℃ of lower insulations 1 hour, air cooling, spraying obtains the sendust powder core.
After testing, associated electrical magnetic parameter such as the table 3 of target product:
Embodiment 5
(1) the iron sial powder by following granularity mixes, and wherein ,-100 orders～+ 200 purpose iron sial powder account for 60% ,-400 purpose iron sial powder that 15% ,-200 orders of gross mass～+ 400 purpose iron sial powder account for quality and account for 25% of gross mass;
(2) preparation insulating wrapped liquid, its mass percent component is: 3% phosphoric acid, 8% inorganic substances particle, 0.1% talcum powder, 0.5% zinc stearate, 0.5% molybdenum bisuphide, all the other are water;
(3) add insulating wrapped liquid in the iron sial powder for preparing and carry out Passivation Treatment, the mass ratio of insulating wrapped liquid and powder is 1:5; Fully stir post-drying;
(4) mixture that step (3) is obtained is pressed into ring-like base sample under the pressure of 1980MPa, the external diameter of magnet ring is 22.90mm, and internal diameter is 14.20mm, and height is 7.60mm.After the base sample is positioned in the argon gas atmosphere, in 700 ℃ of lower insulations 1 hour, air cooling, spraying obtains the sendust powder core.
After testing, associated electrical magnetic parameter such as the table 3 of target product:
Claims (8)
1. the preparation method of a sendust powder core is characterized in that, comprises the steps:
(1) the iron sial powder by following granularity mixes, wherein,-100 orders ~+200 purpose iron sial powder account for 40 ~ 80% ,-400 purpose iron sial powder that 10 ~ 30% ,-200 orders of gross mass ~+400 purpose iron sial powder account for gross mass and account for 10 ~ 30% of gross mass;
(2) preparation insulating wrapped liquid, its mass percent component is: 2 ~ 5% phosphoric acid, 4 ~ 10% inorganic substances particle, 0.1 ~ 1% insulating compound, 0.5 ~ 2% release agent, all the other are water;
(3) add insulating wrapped liquid in the iron sial powder for preparing and carry out Passivation Treatment, the mass ratio of insulating wrapped liquid and powder is 1:5; Fully stir post-drying;
(4) mixture that step (3) is obtained is at the pressure compacted under of 1200 ~ 2500MPa, after the base sample is positioned in the protective atmosphere, in 600 ~ 750 ℃ of lower insulations 0.5 ~ 3 hour, air cooling, spraying obtains the sendust powder core.
2. sendust preparation process for magnetic powder core according to claim 1 is characterized in that, the mass percent component of described inorganic insulation bonded particulate is 30 ~ 55% P
2O
5, 34.9 ~ 59.9% ZnO, 10 ~ 20% B
2O
3, 0.02 ~ 20% CuO, 0.02 ~ 10% Bi
2O
3, 0.02 ~ 10% SrO
5, 0.01 ~ 5% Al
2O
3, 0.01 ~ 5% Na
2O, 0.01 ~ 5% Li
2O
5, 0.01 ~ 5% PbO.
3. sendust preparation process for magnetic powder core according to claim 1 is characterized in that, the mass percent component of described inorganic insulation bonded particulate is 30 ~ 55% P
2O
5, 35 ~ 60% ZnO, 10 ~ 20% B
2O
3
4. soft magnetic metal powder core preparation method according to claim 1 is characterized in that the granularity of described inorganic insulation bonded particulate is 5 ~ 20um.
5. method according to claim 1 is characterized in that, described insulating compound is one or more in kaolin, mica powder or the talcum powder.
6. method according to claim 1 is characterized in that, described release agent is one or more in zinc stearate, barium stearate, calcium stearate or the molybdenum bisuphide.
7. method according to claim 1 is characterized in that, the mass percent component of described iron sial powder is: Si 9 ~ 10%, and Al 5 ~ 6%, and Mn 0.1 ~ 0.2%, and Ti 0.3 ~ 0.6%, and all the other are Fe.
8. method according to claim 1 is characterized in that, described protective atmosphere is nitrogen, argon gas or hydrogen.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745790A (en) * | 2014-01-15 | 2014-04-23 | 中国计量学院 | Mixed soft magnetic powder for metal magnetic powder core |
| CN104084586A (en) * | 2014-06-05 | 2014-10-08 | 浙江大学 | Filter-pressing preparation method for soft-magnetic composite material |
| CN107615411A (en) * | 2015-06-04 | 2018-01-19 | 株式会社神户制钢所 | Compressed-core mixed-powder and compressed-core |
| CN107610873A (en) * | 2017-10-31 | 2018-01-19 | 国网江苏省电力公司电力科学研究院 | A kind of preparation method of composite soft-magnetic powder core of the magnetic conductivity towards PFC inductance equal to 125 |
| CN108043522A (en) * | 2018-01-18 | 2018-05-18 | 青岛联瑞精密机械有限公司 | A kind of ring roll grinding machine and grinding method for iron sial powder mull |
| CN111739730A (en) * | 2020-08-27 | 2020-10-02 | 湖南骅骝新材料有限公司 | Preparation method of organic-coated high-performance metal magnetic powder core |
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| JPS61186458A (en) * | 1985-02-15 | 1986-08-20 | Honda Motor Co Ltd | Production of high-strength aluminum alloy member |
| CN102360671A (en) * | 2011-08-12 | 2012-02-22 | 天通控股股份有限公司 | Preparation method for mu75 magnetic powder core of ferrosilicon aluminum |
| CN102436895A (en) * | 2011-12-19 | 2012-05-02 | 浙江大学 | Preparation method for ferrosilicon aluminum magnetic powder core |
-
2013
- 2013-07-10 CN CN201310291799.XA patent/CN103377786B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61186458A (en) * | 1985-02-15 | 1986-08-20 | Honda Motor Co Ltd | Production of high-strength aluminum alloy member |
| CN102360671A (en) * | 2011-08-12 | 2012-02-22 | 天通控股股份有限公司 | Preparation method for mu75 magnetic powder core of ferrosilicon aluminum |
| CN102436895A (en) * | 2011-12-19 | 2012-05-02 | 浙江大学 | Preparation method for ferrosilicon aluminum magnetic powder core |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745790A (en) * | 2014-01-15 | 2014-04-23 | 中国计量学院 | Mixed soft magnetic powder for metal magnetic powder core |
| CN104084586A (en) * | 2014-06-05 | 2014-10-08 | 浙江大学 | Filter-pressing preparation method for soft-magnetic composite material |
| CN107615411A (en) * | 2015-06-04 | 2018-01-19 | 株式会社神户制钢所 | Compressed-core mixed-powder and compressed-core |
| CN107610873A (en) * | 2017-10-31 | 2018-01-19 | 国网江苏省电力公司电力科学研究院 | A kind of preparation method of composite soft-magnetic powder core of the magnetic conductivity towards PFC inductance equal to 125 |
| CN108043522A (en) * | 2018-01-18 | 2018-05-18 | 青岛联瑞精密机械有限公司 | A kind of ring roll grinding machine and grinding method for iron sial powder mull |
| CN111739730A (en) * | 2020-08-27 | 2020-10-02 | 湖南骅骝新材料有限公司 | Preparation method of organic-coated high-performance metal magnetic powder core |
| CN111739730B (en) * | 2020-08-27 | 2020-11-13 | 湖南骅骝新材料有限公司 | Preparation method of organic-coated high-performance metal magnetic powder core |
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