CN102280241B - Manufacturing process for iron-silicon-aluminum soft magnetic powder - Google Patents
Manufacturing process for iron-silicon-aluminum soft magnetic powder Download PDFInfo
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- CN102280241B CN102280241B CN201110240406A CN201110240406A CN102280241B CN 102280241 B CN102280241 B CN 102280241B CN 201110240406 A CN201110240406 A CN 201110240406A CN 201110240406 A CN201110240406 A CN 201110240406A CN 102280241 B CN102280241 B CN 102280241B
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Abstract
The invention discloses a manufacturing process for iron-silicon-aluminum soft magnetic powder. The manufacturing process comprises the following steps of: A, weighing raw materials according to a weight ratio, and proportioning; B, feeding the proportioned raw materials into a smelting furnace respectively, and smelting the raw materials into alloy steel liquid; C, casting the steel liquid into steel blanks; D, crushing the steel blanks into materials with the grain size of less than 10mm through a crushing device; E, feeding the materials into a grinding device, and processing the materials into materials with the gain size of less than 1mm; F, feeding the materials into a ball mill, and grinding the materials into fine powder with the grain size of more than 100 meshes; G, performing heat treatment on the powder at the temperature of between 60 and 350 DEG C; and H, screening the powder, feeding the powder with qualified grain sizes into an annealing furnace, and performing annealing heat treatment at the temperature of between 500 and 1,000 DEG C. The invention has the advantages that: the manufacturing process is simple, and a product has high performance stability and consistency; the alloy powder has precise components, high liquidity and reasonable grain fineness distribution; the inductance value, the low power consumption and the comprehensive performance of the iron-silicon-aluminum soft magnetic powder are ensured; and the requirements of various usages in different fields can be met.
Description
Technical field
The invention belongs to the manufacturing technology field of metal soft magnetic material, particularly a kind of manufacturing process of iron-silicon-aluminum soft magnet powder.
Background technology
Soft magnetic material has the specific function of magnetoelectricity conversion and energy storage filtering and is widely used in the various circuit design.As a kind of soft magnetic material; The iron sial heavily falls low, the good temperature stability of characteristic, high-frequency loss, good comprehensive magnetic property and advantage such as cost performance preferably because of having high saturated magnetic strength, high permeability, good direct current, is to satisfy current electronics and information technology realizes the desirable soft magnetic material that " high-frequency, miniaturization, high accuracy, low power consuming " requires.Its composition is that Si 9.1～9.8%, Al 5.2～6.0%, surplus are Fe.Because sendust has hard, crisp physical characteristic and can not be rolled into band, can not process non-crystalline material and be applied, the way of solution is earlier alloy to be processed powder, stamping of powder is become the magnetic device of various uses again.
At present, the method for manufacturing metal alloy powders has two kinds: atomizing autofrettage (water atomization, aerosolization or water and gas mixed aerosol are with its spray powdered) and mechanical disintegration, ball milling powder process method.
Japan Patent P2000-30925 has reported water atomization, aerosolization and water, three kinds of methods of making this alloy powder of gas mixed aerosol, all 1000 ℃ of insulations destressing heat treatment in 1 hour in vacuum furnace of the powder of processing, but magnetic property is all not ideal enough.Japanese patent laid-open 11-260618 has reported water, the powder process of gas mixed aerosol, and the example is reported under the 100kHz/1000Gs condition and tests, and core loss is 650～780mw/cm
3, magnetic permeability is 70～85, another example report core loss is at 240mw/cm
3Below, but magnetic permeability is 50～64, also has very big gap with the magnetic permeability 125,147 of practical application.
Chinese patent CN101693979A discloses a kind of technology that adopts the vacuum induction furnace smelting iron-silicon-aluminum soft magnet pulverization alloy: earlier pure iron, silicon metal were being toasted 2 hours more than 300 ℃; Aluminium ingot was baking more than 200 ℃ 2 hours; After treating pure iron fusing fully; Add ferromanganese, ferrotianium, silicon metal, sulphur, aluminium ingot, adding carbon at last, to be smelt composition be Si:9.2～9.8%; Al:5.8～6.2%; Ti:0.5～0.6%; S:0.02～0.03%; C:0.03%; Mn＜0.40%; P＜0.03%; The iron sial alloying base of Fe surplus, casting need be blown into the purification for argon molten steel, sends into the argon shield strand during casting, but it has just introduced the manufacturing process of sendust, and the technology of processing iron sial powder is not provided
Chinese patent CN100429728C has proposed the sendust that vacuum induction furnace smelting adds the special component of a small amount of manganese, titanium elements.Smelt the back ingot casting, Mechanical Crushing becomes less than 120 purpose powder again, and destressing and heat of reduction are handled again, and its composition is Si:9～10%; Al:5.6～6.5%; Ti:0.2～0.6%; Mn+Ti＞0.50%; C＜0.02%; O
2＜100ppm; N
2＜80ppm; The sendust of Fe surplus, its magnetic permeability are 60～125, but the iron sial powder particle size distribution that example report makes is wide, and the powder core that makes is difficult to obtain higher densification property, has limited the application of iron sial powder.
Summary of the invention
The objective of the invention is to solve the technical deficiency that existing iron sial powder manufacturing process exists; Provide that a kind of technology is easy, the iron sial powder manufacturing process of stable performance, it is 26～147 soft magnetic-powder core that the iron sial powder of this technology manufacturing can be made effective permeability.
The object of the invention is realized through following technical scheme: a kind of manufacturing process of iron-silicon-aluminum soft magnet powder, and it may further comprise the steps:
A, raw material is carried out weighing and burden according to weight ratio, each raw material weight ratio is: Armco iron is 83.0%～86%, and polysilicon is 8.5～9.8%, and fine aluminium is 5.3～6.5%, and silicon alloy is 0.2～3.0%;
B, confected materials is added smelting furnace respectively, treat that fusing forms the alloy molten steel after, regulating liquid steel temperature is 1250～1500 ℃, is smelted into the uniform Fe～Si of component～Al ternary alloy three-partalloy molten steel;
C, with in the pouring molten steel mould, cooling forms steel billet;
D, with steel billet through breaker processing, steel billet is broken into the material of particle diameter less than 10mm;
E, the material of step D gained is added reducing mechanism, wear into the material of particle diameter less than 1mm;
F, the material of step e gained is added ball mill, the ball milling time is 0.5～30 hour, grinds greater than 100 purpose sendust powder;
G, the sendust powder of step F gained is put into drying device, under 60～350 ℃ of temperature, carried out The pre-heat treatment 0.5～1.5 hour;
H, with the cooling of the sendust powder of step G gained after screening plant sieves, oversize powder returns above-mentioned F step, sieve powder entering temperature down is 500～1000 ℃ a annealing furnace, heat treatment time is 0.5～3 hour.
Described smelting furnace is antivacuum intermediate frequency furnace or antivacuum Efco-Northrup furnace.
Described breaker comprises jaw crusher and hammering disintegrating machine.
Described annealing furnace is that protective atmosphere, temperature are arranged is that 500～1000 ℃ reductive annealed oven carries out destressing heat treatment.
Protective atmosphere in the described reductive annealed oven is mist or the hydrogen or the nitrogen of hydrogen and nitrogen.
Described annealing furnace is a vacuum furnace.
The present invention has following advantage:
In smelting process; In stove, add the anti-oxygen slag making of silicon alloy; Replenish the loss of silicone content in the fusion process, guaranteed the accuracy of alloying component, reduced the oxygen content that influences magnetic property; Improved the inductance value of the magnetic core of being processed by iron sial powder and the comprehensive magnetic property of magnetic core, it is 26～147 soft magnetic-powder core that the iron sial powder of this technology manufacturing can be made into effective permeability; Between breaker and ball mill, increase reducing mechanism, improved the efficient and the crudy of processing; Adopt twice broken process and twice to grind operation, and after grinding operation, also increase the screening operation, make the iron sial powder rational size distribution that makes, guaranteed densification property, satisfied the purposes of powder in different field by the powder core of iron sial powder compaction.
Description of drawings
Fig. 1 is a structural representation of the present invention
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further description:
Embodiment 1: a kind of manufacturing process of iron-silicon-aluminum soft magnet powder, and as shown in Figure 1, may further comprise the steps:
A, raw material is carried out weighing and burden according to weight ratio, each raw material weight ratio is: Armco iron is 83.0%, and polysilicon is 9.8%, and electrolytic aluminium is 6.5%, and silicon alloy is 0.7%;
B, confected materials mixed the back add antivacuum intermediate frequency furnace, treat that fusing forms the alloy molten steel after, regulating liquid steel temperature is 1450 ℃, is smelted into the uniform Fe～Si of component～Al ternary alloy three-partalloy molten steel;
C, with in the pouring molten steel mould, cooling forms steel billet;
D, with steel billet successively through the processing of jaw crusher and hammering crusher in crushing, steel billet is broken into the material of particle diameter less than 10mm;
E, the material of step D gained is added reducing mechanism, reducing mechanism adopts annular grinder, and material is worn into the material of particle diameter less than 1mm;
F, the material of step e gained is added ball mill, the ball milling time is 100 minutes, grinds into 200 purpose sendust powder;
G, the sendust powder of step F gained is put into drying device, drying device adopts drying oven, under 350 ℃ of temperature, carries out The pre-heat treatment 0.5 hour;
H, with step G gained powder cooling after the screening plant screening, screening plant adopts 200 order vibrating screens, oversize powder returns above-mentioned F step;
I, in reductive annealed oven, feed protective gas; Protective atmosphere is mist or the hydrogen or the nitrogen of hydrogen and nitrogen; It is to carry out destressing heat treatment in 500 ℃ the reductive annealed oven that the powder of step H gained is got into temperature, and heat treatment was come out of the stove after 3 hours.
Analysis detecting data is following:
1, chemical composition
| Element | Si | Al | C | P | O | Fe |
| Wt％ | 9.85 | 6.38 | 0.055 | 0.029 | 0.066 | Surplus |
2, particle size distribution Wt%
| Specification (order) | +200 | -100/+400 | -400 |
| -200 | 1.60 | 70.12 | 28.28 |
3, magnetic core magnetism testing data
Embodiment 2: a kind of manufacturing process of iron-silicon-aluminum soft magnet powder, and as shown in Figure 1, may further comprise the steps:
A, raw material is carried out weighing and burden according to weight ratio, each raw material weight ratio is: Armco iron is 83.5%, and polysilicon is 8.5%, and fine aluminium is 5.3%, and silicon alloy is 2.3%;
B, confected materials mixed the back add antivacuum intermediate frequency furnace, treat that fusing forms the alloy molten steel after, regulating liquid steel temperature is 1500 ℃, is smelted into the uniform Fe～Si of component～Al ternary alloy three-partalloy molten steel;
C, with in the pouring molten steel mould, cooling forms steel billet;
D, with steel billet successively through the processing of jaw crusher and hammering crusher in crushing, steel billet is broken into the material of particle diameter less than 10mm;
E, the material of step D gained is added reducing mechanism, reducing mechanism adopts annular grinder, and material is worn into the material of particle diameter less than 1mm;
F, the material of step e gained is added ball mill, the ball milling time is 30 minutes, grinds-100 purpose sendust powder;
G, the sendust powder of step F gained is put into drying device, drying device adopts drying oven, under 60 ℃ of temperature, carries out The pre-heat treatment 1 hour;
H, with step G gained powder cooling after the screening plant screening, screening plant adopts 100 order vibrating screens, oversize powder returns above-mentioned F step;
I, in reductive annealed oven, feed protective gas; Protective atmosphere is mist or the hydrogen or the nitrogen of hydrogen and nitrogen; It is to carry out destressing heat treatment in 750 ℃ the reductive annealed oven that the powder of step H gained is got into temperature, and heat treatment was come out of the stove after 100 minutes.
Analysis detecting data is following:
1, powder chemistry composition
| Element | Si | Al | C | P | O | Fe |
| Wt％ | 9.48 | 5.17 | 0.058 | 0.016 | 0.062 | Surplus |
2, particle size distribution (Wt%)
| Specification (order) | +100 | -100/+400 | -400 |
| -100 | 6.0 | 73.07 | 20.93 |
3, powder core magnetism testing data
Embodiment 3: a kind of manufacturing process of iron-silicon-aluminum soft magnet powder, and as shown in Figure 1, may further comprise the steps:
A, raw material is carried out weighing and burden according to weight ratio, each raw material weight ratio is: Armco iron is 84.6%, and polysilicon is 9.3%, and fine aluminium is 5.9%, and silicon alloy is 0.2%;
B, confected materials mixed the back add antivacuum Efco-Northrup furnace, treat that fusing forms the alloy molten steel after, regulating liquid steel temperature is 1250 ℃, is smelted into the uniform Fe～Si of component～Al ternary alloy three-partalloy molten steel;
C, with in the pouring molten steel mould, cooling forms steel billet;
D, with steel billet successively through the processing of jaw crusher and hammering crusher in crushing, steel billet is broken into the material of particle diameter less than 10mm;
E, the material of step D gained is added reducing mechanism, reducing mechanism adopts annular grinder, and material is worn into the material of particle diameter less than 1mm;
F, the material of step e gained is added ball mill, the ball milling time is 30 hours, grinds into 300 purpose sendust powder;
G, the sendust powder of step F gained is put into drying device, drying device adopts drying oven, under 250 ℃ of temperature, carries out The pre-heat treatment 1.5 hours;
H, with step G gained powder cooling after the screening plant screening, screening plant adopts 300 order vibrating screens, oversize powder returns above-mentioned F step;
I, the powder of step H gained is got into temperature is to carry out destressing heat treatment in 1000 ℃ the vacuum furnace, and heat treatment was come out of the stove after 30 minutes.
Analysis detecting data is following:
1, powder chemistry composition
| Element | Si | Al | C | P | O | Fe |
| Wt％ | 9.30 | 5.68 | 0.046 | 0.022 | 0.069 | Surplus |
2, particle size distribution Wt%
| Specification (order) | +300 | -300～+400 | -400 |
| -300 | 5.23 | 32.12 | 62.65 |
3, magnetic core magnetism testing data
Claims (5)
1. the manufacturing process of an iron-silicon-aluminum soft magnet powder, it is characterized in that: it may further comprise the steps:
A, raw material is carried out weighing and burden according to weight ratio, each raw material weight ratio is: Armco iron is 83.0%～86%, and polysilicon is 8.5～9.8%, and fine aluminium is 5.3～6.5%, and silicon alloy is 0.2～3.0%;
B, confected materials is added smelting furnace, treat that fusing forms the alloy molten steel after, regulating liquid steel temperature is 1250～1500 ° of C, is smelted into the uniform Fe～Si of component～Al ternary alloy three-partalloy molten steel;
C, pouring molten steel is gone in the mould, cooling forms steel billet;
D, with steel billet through breaker processing, be broken into the material of particle diameter less than 10mm;
E, the material of step D gained is added reducing mechanism, wear into the material of particle diameter less than 1mm;
F, the material of step e gained is added ball mill, the ball milling time is 0.5～30 hour, grinds greater than 100 purpose sendust powder;
G, the sendust powder of step F gained is put into drying device, under 60～350 ℃ of temperature, carried out The pre-heat treatment 0.5～1.5 hour;
H, with the cooling of the sendust powder of step G gained after screening plant sieves, oversize powder returns above-mentioned F step, sieve powder entering temperature down is 500～1000 ℃ a annealing furnace, heat treatment time is 0.5～3 hour.
2.
According toThe manufacturing process of the described a kind of iron-silicon-aluminum soft magnet powder of claim 1 is characterized in that: described smelting furnace is antivacuum intermediate frequency furnace or antivacuum Efco-Northrup furnace.
3. the manufacturing process of a kind of iron-silicon-aluminum soft magnet powder according to claim 1 is characterized in that: described annealing furnace is that protective atmosphere, temperature are arranged is that 500～1000 ℃ reductive annealed oven carries out destressing heat treatment.
4. according to the manufacturing process of claim 1 or 3 described a kind of iron-silicon-aluminum soft magnet powder, it is characterized in that: the protective atmosphere in the described annealing furnace is mist or the hydrogen or the nitrogen of hydrogen and nitrogen.
5. the manufacturing process of a kind of iron-silicon-aluminum soft magnet powder according to claim 1 is characterized in that: described annealing furnace is a vacuum furnace.
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Application publication date: 20111214 Assignee: Chengdu Jingpin Technology Co.,Ltd. Assignor: Chen Denggang Contract record no.: 2012510000153 Denomination of invention: Manufacturing process for iron-silicon-aluminum soft magnetic powder Granted publication date: 20120704 License type: Exclusive License Record date: 20121218 |
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Effective date of registration: 20190419 Address after: 610000 No. 129 Gangbei No. 7 Road, North Area of Pixian Modern Industrial Port, Chengdu City, Sichuan Province Patentee after: Chengdu Huimagnet Electronic Materials Co., Ltd. Address before: 643000 No. 111 Renmin Road, Da'an District, Zigong City, Sichuan Province Patentee before: Chen Denggang |
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