CN110004382A - A kind of ring-shaped inductors part, FeSiCr soft-magnetic alloy powder and preparation method thereof - Google Patents
A kind of ring-shaped inductors part, FeSiCr soft-magnetic alloy powder and preparation method thereof Download PDFInfo
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- 238000005275 alloying Methods 0.000 claims abstract description 12
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- 238000009826 distribution Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 5
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- 229910005347 FeSi Inorganic materials 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- 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
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
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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
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- 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
- B22F2009/0824—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 with a specific atomising fluid
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- 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
- B22F2009/0848—Melting process before atomisation
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- 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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Abstract
The present invention discloses a kind of ring-shaped inductors part, FeSiCr soft-magnetic alloy powder and preparation method thereof, and alloying component is by percentage to the quality are as follows: 4.0-8.0%Cr, 2.0-8.0%Si, 1.2-2.0%Ni, 0.5-0.8%Mo, 85-92.3%Fe.FeSiCr soft-magnetic alloy powder prepared by the present invention, impurity content is few, alloying component, uniform texture, and carbon, oxygen content are low, and for powder good sphericity in spherical, apparent density, tap density are higher；Prepared product suppression performance is good, inductance value is high, power loss is lower, and rust-preventing characteristic is good, and the raw material that can be used as ring-shaped inductors part are used widely.
Description
Technical field
The present invention relates to the technologies of preparing of soft-magnetic alloy powder, in particular to a kind of ring-shaped inductors part, FeSiCr soft magnetism to close
Bronze end and preparation method thereof.
Background technique
Metal powder is important powder metallurgy raw material, is the basis of powder metallurgy industry.Chemical reaction method, melt atomization
Method, mechanical crushing method and strike etc. are current main metal powder preparation methods.Wherein, melt atomization method preparation is closed
Bronze end possess with the identical chemical component of set molten alloy, also have typical rapid solidification structure, alloying component
Range is wide, powder morphology multiplicity, the wide in range adjustable feature of size distribution.
Currently, being used for ring-shaped inductors iron silicochromium soft-magnetic alloy powder, powder oxygen by what conventional water atomization was produced
Content is high, and pattern is irregular, the rougher more adhesions in surface, so that powder is in insulating wrapped, particle surface insulating coating pole
Unevenly, and in magnet ring pressing process, irregular shape sprills are easy to puncture insulating layer, easily cause the insulation resistance of ring-shaped inductors part
Resist low, loss height, and the defect of rust-preventing characteristic difference.In addition, gas atomization produce for ring-shaped inductors iron silicochromium magnetically soft alloy
Powder is almost spherical shape, and powder pressing forming is poor, and product is not easy densification, and is only point contact between powder particle, is effectively demagnetized
Coefficient is big, and prepared ring-shaped inductors part inductance value is relatively low, is unsuitable for the large-scale production of high-performance ring shaped inductance part.
In consideration of it, inventor furthers investigate the above problem, and propose that a kind of ring-shaped inductors part that is suitable for is used
Thus FeSiCr soft-magnetic alloy powder and preparation method thereof and thus obtained ring-shaped inductors part, this case generate.
Summary of the invention
A purpose of the present invention is that providing a kind of preparation suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder
Method overcomes and existing prepare ring-shaped inductors part using conventional water atomization FeSiCr soft-magnetic alloy powder and have that loss is high, rust-preventing characteristic
The defect of difference, and solves the problems, such as to use aerosolization FeSiCr soft-magnetic alloy powder that prepare ring-shaped inductors part inductance value relatively low.
In order to achieve the above objectives, solution of the invention is:
It is a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder, steps are as follows:
1) Medium frequency induction melting: ingredient: 4.0-8.0%Cr, 2.0-8.0% is carried out by following alloying component mass percent
Si, 1.2-2.0%Ni, 0.5-0.8%Mo, 85-92.3%Fe；Later by the raw material matched by pure iron, ferrochrome, pure nickel, pure
The sequence of molybdenum, HIGH-PURITY SILICON successively feeds intake and smelts in corundum crucible, reaches 1580-1620 DEG C to molten steel temperature, it is de- to carry out slag making
Oxygen processing；
2) water-gas combined atomization: employing nitrogen as process protective atmosphere, and atomization process sprays double V using 40 °/30 ° major-minors
Type nozzle, molten steel tundish bottom leakage eye are having a size of 3.0-4.0mm, atomizing pressure 100-120MPa, atomized water flow
100-140L/min；
3) dry and screening process: using vacuum drying alloy powder, particle classifying and screening process are carried out later.
It in the step 1), is smelted in smelting in corundum crucible, it is 200-300KW that power is smelted in control, smelts duration
It is 60.0-80.0 minutes, reaches 1580-1620 DEG C to molten steel temperature, reduction power is 100-150KW, then carries out slag making deoxidation
Processing.
In the step 1), slag making deoxidation treatment carries out slag making deoxidation treatment, process to molten steel using appropriate silico-calcium, lime
It Shi Changwei 10.0-15.0 minutes, then skims clean, plays pump and pour steel.
In the step 2), in water-gas combined atomization process, air-flow, pre-dispersed high temperature melting are accelerated using Lavalle graphite cup
Melt molten metal.
In the step 2), nitrogen flow 25.0m3/h.
In the step 3), vacuum drying is using the dry alloy powder of double-cone vacuum dryer, drying temperature 130-190
DEG C, vacuum degree≤- 0.09MPa.
In the step 3), particle classifying and screening process are as follows: using air current classifying control powder size and distribution, control powder
D90:27-30 μm of last laser particle size.
Using above-mentioned preparation method, obtain a kind of suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder, the alloy
D90:27-30 μm of powder laser granularity, oxygen content in power≤0.2wt%, powder tap density >=4.2g/cm3.
Another object of the present invention is to provide a kind of ring-shaped inductors part, using it is above-mentioned be prepared into be suitable for ring-shaped inductors part
It is prepared with FeSiCr soft-magnetic alloy powder, its pressed density >=6.2g/cm of obtained ring-shaped inductors part3；Ring-shaped inductors inductance value
Ps≤500kW/m is lost in Ls >=50 μ H@1V, 100KHZ3@0.5T, 100KHZ.
The ring-shaped inductors part is in 48 hours salt spray tests without rust spot.
Still a further object of the present invention is to provide a kind of suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder, former material
Expect ingredient with mass percent are as follows: 4.0-8.0%Cr, 2.0-8.0%Si, 1.2-2.0%Ni, 0.5-0.8%Mo, 85-
92.3%Fe.
After adopting the above scheme, the beneficial effect of the present invention compared with the existing technology is:
1, special alloying component formula for raw stock: 4.0-8.0%Cr, 2.0-8.0%Si, 1.2-2.0%Ni is designed,
0.5-0.8%Mo, 85-92.3%Fe cooperate later period vacuum drying, powder in conjunction with water-gas combined atomization by Medium frequency induction melting
Body classification and screening process, can prepare that good sphericity, oxygen content be low, rational size distribution FeSiCr soft-magnetic alloy powder.Specifically
Powder laser granularity is D90:27-30 μm, oxygen content≤0.2wt%, tap density >=4.2g/cm3.
2, a kind of ring-shaped inductors part: the DC-805 silicone resin cladding using 1% KH-550 silane coupling agent+2% is above-mentioned
FeSiCr soft-magnetic alloy powder, 40 mesh are granulated, and 100 DEG C are toasted 1 hour；Take pelletizing 27g after drying, in 600MPa, pressure maintaining 3 seconds
Under the conditions of cold compaction for outer diameter Φ 27mm × internal diameter Φ 14.5mm ring-shaped inductors part.Using TH2816B/TH2826LCR tester
Ring-shaped inductors inductance value Ls under the conditions of f=100kHz, 1V is tested, using MATS-2010SA magnetically soft alloy alternating-current measuring device
Test ring-shaped inductors loss value under the conditions of Bm=0.5T, f=100kHz.Measure ring-shaped inductors part performance, pressed density >=
6.2g/cm3；Ps≤500kW/m3 is lost in the μ H of inductance value Ls >=50.
3, this case is prepared into alloy powder using water-gas combined atomization method, can better ensure that the magnetically soft alloy of preparation
Powder good sphericity, tap density are high, and oxygen content in power is low, and ring-shaped inductors product suppression performance is good, and inductance value is high, and rust-preventing characteristic is good
The features such as.
4, water-gas combined atomization prepares this alloy powder, preferably uses Lavalle graphite cup to accelerate in spray disk centre
Air-flow to supersonic speed, pre-dispersed high-temperature molten metal liquid, molten drop spheroidization ability enhances, and since molten steel is pre-dispersed, powder
Last granularity is more tiny, can prepare subsphaeroidal superfine alloy powder using this technique.
Detailed description of the invention
Fig. 1 is the Lavalle graphite cup schematic diagram in the present invention；
Fig. 2 is 1 prepared alloy powder SEM pattern of embodiment in the present invention；
Fig. 3 is to prepare alloy powder SEM pattern in comparative example 1 in the present invention.
Specific embodiment
This case is described in further detail With reference to embodiment.
This case is related to a kind of preparation method suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder, passes through following step
It is rapid to realize:
1) Medium frequency induction melting: ingredient: 4.0-8.0%Cr, 2.0-8.0% is carried out by following alloying component mass percent
Si, 1.2-2.0%Ni, 0.5-0.8%Mo, 85-92.3%Fe；Later by the raw material matched by pure iron, ferrochrome, pure nickel, pure
The sequence of molybdenum, HIGH-PURITY SILICON successively feeds intake and smelts in corundum crucible, reaches 1580-1620 DEG C to molten steel temperature, it is de- to carry out slag making
Oxygen processing；
It is described smelted in corundum crucible in smelt, preferably control that smelt power be 200-300KW, when smelting is a length of
60.0-80.0 minutes, reach 1580-1620 DEG C to molten steel temperature, reduction power is 100-150KW, then is carried out at slag making deoxidation
Reason.
Preferably, the slag making deoxidation treatment concrete operations are to carry out slag making deoxidation to molten steel using appropriate silico-calcium, lime
Processing, process duration are 10.0-15.0 minutes, are then skimmed clean, play pump and pour steel.
The raw material feed intake in different melting loss of elements ratios, and degree of oxidation is different and sequence is put into, and raw material include
Pure iron, ferrochrome, pure nickel, pure molybdenum, HIGH-PURITY SILICON are several, and each element quality percentage accounting of the raw material is as described above.
2) water-gas combined atomization: employing nitrogen as process protective atmosphere, and atomization process sprays double V using 40 °/30 ° major-minors
Type nozzle, molten steel tundish bottom leakage eye are having a size of 3.0-4.0mm, atomizing pressure 100-120MPa, atomized water flow
100-140L/min；
The nitrogen protection atmosphere, nitrogen flow are preferably controlled in 25.0m3/h.
Preferably, in above-mentioned water-gas combined atomization process, using the acceleration air-flow (shown in Figure 1) of Lavalle graphite cup 3,
Pre-dispersed high-temperature molten metal liquid 4.Described 40 °/30 ° major-minors spray double V-shaped nozzle, that is, refer to atomization process using 40 °/30 ° major-minors
Spray spray disk 1, and use double V-shaped nozzle 2.
3) dry and screening process: using vacuum drying alloy powder, particle classifying and screening process are carried out later.
The vacuum drying can specifically be had, dry temperature using the dry alloy powder of double-cone vacuum dryer, parameter designing
Degree is 130-190 DEG C, vacuum degree≤- 0.09MPa.
The particle classifying and screening process, a preferred embodiment are to control powder size using air current classifying and divide
Cloth controls D90:27-30 μm of powder laser granularity.
Step 3) can also carry out finally closing batch processing afterwards.
Using above-mentioned preparation method, obtain a kind of suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder, the alloy
D90:27-30 μm of powder laser granularity, oxygen content in power≤0.2wt%, powder tap density >=4.2g/cm3.
Ring-shaped inductors part is prepared using FeSiCr soft-magnetic alloy powder obtained above, specifically, using opposite
It is soft that the DC-805 silicone resin of the KH-550 silane coupling agent+2% of FeSiCr soft-magnetic alloy powder weight 1% coats above-mentioned FeSiCr
Magnetic alloy powder, 40 mesh are granulated, and 100 DEG C are toasted 1 hour；Pelletizing 27g after drying is taken, it is cold under the conditions of 600MPa, pressure maintaining 3 seconds
Suppress standby outer diameter Φ 27mm × internal diameter Φ 14.5mm ring-shaped inductors part.Annular is tested using TH2816B/TH2826LCR tester
Inductance inductance value Ls under the conditions of f=100kHz, 1V tests annular using MATS-2010SA magnetically soft alloy alternating-current measuring device
Inductance loss value under the conditions of Bm=0.5T, f=100kHz.Its pressed density >=6.2g/cm of obtained ring-shaped inductors part3；
Ps≤500kW/m is lost in ring-shaped inductors inductance value Ls >=50 μ H@1V, 100KHZ3@0.5T, 100KHZ.In addition, the ring-shaped inductors
Part is in 48 hours salt spray tests without rust spot.
The present invention passes through optimized alloy ingredient and is prepared for by way of combining water-gas combined powder by atomization a kind of suitable for ring
Shape inductance part FeSiCr soft-magnetic alloy powder.FeSiCr alloy has that excellent DC superposition characteristic, plasticity is good, high frequency function
The features such as rate loss is low, ageing resistance is strong, magnetic conductivity is high, therefore the material obtains in fields such as electronics, electric power and telecommunications
It is widely applied.Wherein, the addition of Si increases the resistivity of alloy, and then reduces eddy-current loss；And with the increasing of Si content
Add, magnetocrystalline anisotropy constant and magnetostriction coefficient are gradually reduced, this is advantageous to alloy magnetic conductivity is improved.Cr can be mentioned
The plasticity of high material, mechanical strength and resistance to corrosion in harsh environment.It is obtained by adding Cr in FeSi alloy
FeSiCr soft-magnetic alloy powder corrosion resistance, temperature stability and heat resistant ability significantly increase.
Ni, Mo and Cr have the characteristics that different in terms of improving magnetically soft alloy anti-corrosion capability.In highly concentrated chloride corrosion ring
Under border, FeSiCr Stability of Passive Film can be remarkably reinforced in the addition of a small amount of Ni, Mo, improve alloy corrosion resistance.Therefore, this case
It is further increased under the premise of FeSiCr alloy magnetic property will not be affected by ensuring by adding suitable Ni, Mo
FeSiCr alloy corrosion resistance energy.
The water-gas combined powder by atomization method of this case combines the advantage of aerosolization and water atomization, and mechanism is in nitrogen protection
Under conditions of, aluminium alloy is flowing into nebulization region by the leakage eye of tundish bottom, accelerates to supersonic speed through Lavalle graphite cup
Aluminium alloy strength is broken into a large amount of thin by the super-pressure atomized water that gas and the spray double V-shaped nozzle of disk eject, two kinds of atomizing mediums
Small metal drop, then cooled and solidified is alloy powder.Have oxygen content in power low using this method prepared alloy powder, powder
The advantages that last particle dispersion is few to reunite, spherical, it is suitable for preparation high density, high inductance value toroidal inductor.
In the present invention, Lavalle graphite cup is also particularly used in spray disk center, in the most narrow place of graphite cup hereinafter, high speed gas
Stream and then is accelerated to supersonic speed by Fast Compression, so that high-temperature molten metal liquid is before entering high-pressure water atomization region,
Under shearing force, by the dispersed metal drop for multiple filamentals that supersonic airstream tearing is " cone ", substantially reduce
Molten steel reference area, increases molten steel surface tension, surface can increase, and greatly enhances the spheroidization ability of molten drop,
Powder good sphericity.
Ring-shaped inductors part iron silicochromium soft-magnetic alloy powder, the chemical component of used powder, partial size, powder morphology and
The parameters such as oxygen content are most important.Powder chemistry ingredient determines ring-shaped inductors part soft magnet performance and rust-preventing characteristic.Powder is spherical,
Dispersion is few to reunite, and powder pine dress, tap density are high, prepares that toroidal inductor pressed density is high, loss is low；And oxygen content in power is got over
Height, powder inside is hard and brittle metal oxide increases, and leads to the reduction of soft-magnetic alloy powder suppression performance, and nonmagnetic metal aoxidizes
Object, which is mingled with, hinders alloy magnetic history, in order to ensure obtaining high inductance value soft-magnetic alloy powder, generally requires soft magnetic metal powder
Oxygen content is controlled in lower level.This case, can using the prepared iron silicochromium soft-magnetic alloy powder obtained of above-mentioned preparation method
Accomplish that oxygen content is sufficiently low, it is ensured that high inductance value ring-shaped inductors part can be made.
Embodiment 1
It is a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder, comprising:
1) Medium frequency induction melting: alloying component is (89.8wt%) Fe-3.5wt%Si-5.0wt%Cr-1.2wt%Ni-
0.5wt%Mo,
By above-mentioned alloying component carry out ingredient, by raw material by pure iron, ferrochrome, pure nickel, pure molybdenum, HIGH-PURITY SILICON sequence, according to
Secondary feed intake is smelted in corundum crucible, and it is 200-300KW that power is smelted in control, and when smelting is 60.0-70.0 minutes a length of, to molten steel
Temperature reaches 1580-1620 DEG C, and reduction power is 100-150KW, is carried out at slag making deoxidation using appropriate silico-calcium, lime to molten steel
Reason, process duration are 10.0 minutes, are then skimmed clean, play pump and pour steel；
2) it water-gas combined atomization: employs nitrogen as process protective atmosphere, nitrogen flow 25.0m3/h；Atomization process is adopted
With 40 °/30 ° major-minors spray spray disks, double V-shaped nozzle, molten steel tundish bottom leaks eye having a size of 3.0mm, atomizing pressure 100MPa,
Atomized water flow is 120L/min；
3) be dried in vacuo: using the dry alloy powder of double-cone vacuum dryer, drying temperature is 170 DEG C, vacuum degree≤-
0.09MPa；
4) particle classifying and screening: using air current classifying control powder size and distribution, powder laser granularity D90:27- is controlled
30μm；
5) batch processing is closed.
Embodiment 2
The present embodiment 2 the difference from embodiment 1 is that: the one kind prepared in the present embodiment 2 suitable for ring-shaped inductors part use
FeSiCr soft-magnetic alloy powder ingredient is adjusted, prepared alloy powder alloying component composition are as follows: (86.3wt%) Fe-
7.0wt%Si-5.0wt%Cr-1.2wt%Ni-0.5wt%Mo, mentioned component are mass percent.
Embodiment 3
The present embodiment 3 the difference from embodiment 1 is that: in the present embodiment 3 prepared by adjustment a kind of to be suitable for ring-shaped inductors part
With the water-gas combined atomization process of FeSiCr soft-magnetic alloy powder.Specific atomization process are as follows: employ nitrogen as and protect gas for process
Atmosphere, nitrogen flow 25.0m3/h；Using 40 °/30 ° major-minor spray spray disks, double V-shaped nozzle；Molten steel tundish bottom leaks eye size
For 3.5mm, atomization water pressure is 110MPa, and atomized water flow is 130L/min.
Embodiment 4
The present embodiment 4 the difference from embodiment 1 is that: in the present embodiment 4 prepared by adjustment a kind of to be suitable for ring-shaped inductors part
With the water-gas combined atomization process of FeSiCr soft-magnetic alloy powder.Specific atomization process are as follows: employ nitrogen as and protect gas for process
Atmosphere, nitrogen flow 25.0m3/h；Using 40 °/30 ° major-minor spray spray disks, double V-shaped nozzle；Molten steel tundish bottom leaks eye size
For 4.0mm, atomization water pressure is 120MPa, water flow 140L/min.
Comparative example 1
This comparative example 1 the difference from embodiment 1 is that: using conventional water atomization pulverization technique preparation gold in this comparative example 1
Belong to powder.The successively techniques such as Medium frequency induction melting, conventional water atomization, vacuum drying, particle classifying and screening, conjunction batch processing, system
At graininess alloy powder, influence of the water-gas combined atomization with conventional water atomization to powder property is compared.
Embodiment 1 and 1 prepared alloy powder SEM pattern of comparative example difference are referring to figure 1 and figure 2.
Comparative example 2
This comparative example 2 the difference from embodiment 1 is that: a kind of FeSiCr soft-magnetic alloy powder prepared in this comparative example 2,
Not nickeliferous in alloying component, the molybdenum element of resistance to spot corrosion；Design of alloy in this comparative example 2 are as follows: Fe-3.5wt%Si-5.0wt%
Cr。
Comparative example 3
This comparative example 3 the difference from embodiment 1 is that: a kind of FeSiCr soft-magnetic alloy powder prepared in this comparative example 3,
A small amount of cobalt element is added in alloying component, probes into its influence to FeSiCr magnetically soft alloy magnetic property；In this comparative example 3 alloy at
Set up separately and be calculated as: Fe-3.5wt%Si-5.0wt%Cr-1.2wt%Ni-0.5wt%Mo-1wt%Co.
Alloy powder prepared by 1-4 of the embodiment of the present invention, comparative example 1-3 and ring-shaped inductors part performance characterization, see the table below
1:
Table 1
As shown in Table 1,1-4 of the embodiment of the present invention can prepare a kind of suitable for ring-shaped inductors part FeSiCr magnetically soft alloy
Powder.It can illustrate the soft-magnetic alloy powder that preferably ensure that preparation using water-gas combined atomization atomization process by comparative example 1
The features such as rational size distribution, powder good sphericity tap density is high, and oxygen content is low, prepared ring-shaped inductors part product briquettability
Can be good, inductance value is high, is lost low.By comparative example 2 it is found that the addition of specific quantity Ni, Mo element enhances the conjunction of FeSiCr soft magnetism
Bronze end surface passivation membrane stability, improves corrosion resistance, and FeSiCr soft-magnetic alloy powder rustless property is been significantly enhanced.
By comparative example 3 it is found that a small amount of Co element is added to raising FeSiCr magnetically soft alloy inductance value Ls without positive effect, and due to Co
Atom magnetocrystalline anisotropy constant K1 is much larger than Fe atom, and alloy powder intrinsic coercivity increases, and ring-shaped inductors part is caused to be lost
Ps is the same as bigger.
Above-described embodiment is merely a preferred embodiment of the present invention, and it is not intended to limit the protection scope of the present invention, as long as using
Design principle of the invention, and the non-creative variation worked and made is carried out on this basis, it should belong to of the invention
Within protection scope.
Claims (10)
1. a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder, which is characterized in that steps are as follows:
1) Medium frequency induction melting: carrying out ingredient: 4.0-8.0%Cr, 2.0-8.0%Si by following alloying component mass percent,
1.2-2.0%Ni, 0.5-0.8%Mo, 85-92.3%Fe；Later by the raw material matched by pure iron, ferrochrome, pure nickel, pure molybdenum,
The sequence of HIGH-PURITY SILICON successively feeds intake and smelts in corundum crucible, reaches 1580-1620 DEG C to molten steel temperature, carries out slag making deoxidation
Processing；
2) water-gas combined atomization: employing nitrogen as process protective atmosphere, and atomization process sprays double V-shaped sprays using 40 °/30 ° major-minors
Mouth, molten steel tundish bottom leak eye having a size of 3.0-4.0mm, and atomizing pressure 100-120MPa, atomized water flow is 100-
140L/min；
3) dry and screening process: using vacuum drying alloy powder, particle classifying and screening process are carried out later.
2. it is as described in claim 1 a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder,
It is characterized in that, in the step 1), smelt in smelting in corundum crucible, it is 200-300KW that power is smelted in control, smelts duration
It is 60.0-80.0 minutes, reaches 1580-1620 DEG C to molten steel temperature, reduction power is 100-150KW, then carries out slag making deoxidation
Processing.
3. it is as described in claim 1 a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder,
It is characterized in that, in the step 1), slag making deoxidation treatment carries out slag making deoxidation treatment, mistake to molten steel using appropriate silico-calcium, lime
It is 10.0-15.0 minutes a length of when journey, it then skims clean, plays pump and pour steel.
4. it is as described in claim 1 a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder,
It is characterized in that, in the step 2), in water-gas combined atomization process, air-flow, pre-dispersed high temperature is accelerated using Lavalle graphite cup
Molten metal bath.
5. it is as described in claim 1 a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder,
It is characterized in that, in the step 2), nitrogen flow 25.0m3/h.
6. it is as described in claim 1 a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder,
It is characterized in that, in the step 3), vacuum drying is using the dry alloy powder of double-cone vacuum dryer, drying temperature 130-
190 DEG C, vacuum degree≤- 0.09MPa.
7. it is as described in claim 1 a kind of suitable for the ring-shaped inductors part preparation method of FeSiCr soft-magnetic alloy powder,
It is characterized in that, in the step 3), particle classifying and screening process are as follows: using air current classifying control powder size and distribution, control
D90:27-30 μm of powder laser granularity.
8. as claim 1-7 is described in any item a kind of suitable for the preparation of FeSiCr soft-magnetic alloy powder of ring-shaped inductors part
Method, which is characterized in that obtain a kind of suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder, the alloy powder laser grain
D90:27-30 μm of degree, oxygen content in power≤0.2wt%, powder tap density >=4.2g/cm3.
9. one kind is suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder, which is characterized in that its composition of raw material is with quality
Percentage are as follows: 4.0-8.0%Cr, 2.0-8.0%Si, 1.2-2.0%Ni, 0.5-0.8%Mo, 85-92.3%Fe.
10. a kind of ring-shaped inductors part, which is characterized in that described in any item a kind of suitable for annular electro using claim 1-7
The preparation method for feeling part FeSiCr soft-magnetic alloy powder, what is be prepared into is suitable for ring-shaped inductors part FeSiCr soft-magnetic alloy powder
Prepared by end, obtained ring-shaped inductors part its pressed density >=6.2g/cm3；The ring-shaped inductors inductance value μ H@1V of Ls >=50,
Ps≤500kW/m is lost in 100KHZ3@0.5T, 100KHZ.
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| CN112885551A (en) * | 2021-01-13 | 2021-06-01 | 泉州天智合金材料科技有限公司 | FeSiCr soft magnetic powder for inductor and application thereof |
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