CN109841401A - A kind of preparation method of soft magnetic composite powder material - Google Patents
A kind of preparation method of soft magnetic composite powder material Download PDFInfo
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- CN109841401A CN109841401A CN201711205002.4A CN201711205002A CN109841401A CN 109841401 A CN109841401 A CN 109841401A CN 201711205002 A CN201711205002 A CN 201711205002A CN 109841401 A CN109841401 A CN 109841401A
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Abstract
The present invention relates to powder metallurgical technologies, more particularly to a kind of preparation method of soft magnetic composite powder material, defect problem existing for soft magnetic metal steel and the other soft magnetic materials of soft magnetic ferrite two major classes is solved, it is characterized in that including 84~89%Mn, 5.5~6.5%N, 2.0~4.0%Nb, 1.5~2.0%Ce, 2.0~3.0%Mo；Raw material are placed in intermediate frequency furnace; nitrogen protection in temperature-rise period; after melting completely; it is suitably kept the temperature at 1650~1750 DEG C; molten steel atomization is carried out with 20~double centner flow per minute, the slurry after atomization is dehydrated, then vacuum dried rear progress reduction treatment; powder agglomates after reduction is broken, packs after crossing 150 mesh screens.The soft magnetic metal product having excellent magnetic characteristics can be prepared using this powder.
Description
Technical field
The present invention relates to powder metallurgical technology more particularly to a kind of preparation methods of soft magnetic composite powder material.
Background technique
Metal soft magnetic powder core has the good characteristic of soft magnetic metal steel and the other soft magnetic materials of soft magnetic ferrite two major classes concurrently, and
Defect existing for the two is improved to the maximum extent, and the development trend of soft magnetic-powder core is to pursue to prepare while possessing height to lead at present
Magnetic rate and low-loss metal soft magnetic powder core, to reach this target, wherein raw material powder is most important, the element of powder
The physical and chemical performances such as composition configuration, size distribution influence the magnetic property of soft magnetic product very big.High permeability in the prior art
The manufacture of material such as patent publication No. is that CN1246500A is related to a kind of macromolecule/magnetic Nano composite microwave medium material
Material, fluorine-containing, not fluorine-containing high polymer or their copolymerization, the high molecular material and metal, alloy or ferrite soft magnetism of blend
Material is that macromolecule by powder or suspension and magnetic material are agitated by 1: 1 to 1: 10 parts by weight mixing composition, method,
The methods of ball milling or ultrasound uniformly it is compound, certain shapes is made with the pressure of 0.4~4 ton/cm2, air, argon gas, nitrogen or
In hydrogen, it is heat-treated 30 minutes and is made at a temperature of 120~400 DEG C, this material can not substitute metal proposed by the invention
Powder.For another example patent publication No. provides a kind of microcrystalline soft magnetic powder material with high saturation and magnetic intensity for CN101572150A
Material, the weight percentage of ingredient are as follows: 4~7%AL, 7~12%N, 0.05~0.2%CU, 0.1-0.5%ZR, 0.5~
2.5%B, 0.05~0.1%PR, 0.05~0.1%LA, 0.01~0.05%P, remaining be Mn.Also it is just like patent publication No.
CN102136331A discloses a kind of efficient soft magnetic composite powder material and preparation method thereof, which is by high resistivity soft magnetism
Ferrite constitutes nest wall construction, and the ferrite of nest wall construction surrounds and soft magnetic metal or alloying pellet soft magnetism in completely isolated nest
Phase, makes soft magnetic metal or alloying pellet soft magnetic phase mutually insulated in nest, and the content of soft magnetic metal or alloying pellet is
50wt%~99wt%, remaining is soft magnetic ferrite；Method be by soft magnetic metal or alloying pellet and soft magnetic ferrite powder by
Ratio mixing, makes soft magnetic ferrite powder substantially uniformity be coated on soft magnetic metal or alloying pellet surface, then through electric discharge etc. from
The sub- complex sintered forming of sintering densification finally carries out stress relief annealing heat treatment.These formulas and manufacturing method are obtained
Product all has feature alone, can not replace product obtained by the present invention.
Summary of the invention
The purpose of the present invention is to solve existing for soft magnetic metal steel and the other soft magnetic materials of soft magnetic ferrite two major classes
Defect problem provides a kind of preparation method of scientific, rational technology the soft magnetic composite powder material of formula.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals: a kind of soft magnetic composite powder
The preparation method of material, it is characterized in that the weight percentage comprising following powdered elemental: 84~89%Mn, 5.5~6.5%N,
2.0~4.0%Nb, 1.5~2.0%Ce, 2.0~3.0%Mo；Its process is that raw material are placed in intermediate frequency by formula rate stock
In furnace, heat temperature raising, fusion process uses nitrogen protection, every with 20~double centner after raw material melt completely, then by molten steel
The flow of minute carries out hydraulic atomized process, is protected in atomization process using nitrogen, and the slurry after atomization is dehydrated,
Carry out reduction treatment after vacuum dried again, 600~800 DEG C of reduction temperature, 30~40 cubic metres of decomposed ammonia flow per hour,
Powder agglomates after reduction is crushed, is packed after crossing 150 mesh screens." decomposed ammonia flow " refers to is passed through reduction furnace per hour
In volume number.By this process, the features such as granularmetric composition is reasonable, and element arrangements are appropriate, uniform ingredients are stablized can be produced
Metal powder, the soft magnetic metal part made of this powder has the characteristics that the low-loss magnetic property of high permeability.
The invention has effective effect that: it improves and is lacked existing for two kinds of soft magnetic materials of soft magnetic metal steel and soft magnetic ferrite
It falls into, excellent comprehensive mechanical property can prepare the soft magnetic metal product having excellent magnetic characteristics using this powder.
Specific embodiment
Below by embodiment, the technical solutions of the present invention will be further described.
A kind of high permeability low-loss metal soft magnetic material powder of the present embodiment, material prepare: 250 kilograms of technical pures
Iron, 18 kilograms of pure silicon pieces, 9 kilograms of nickel plates, 10 kilograms of ferrochrome containing chromium 60%, 11 kilograms of molybdenum-irons containing molybdenum 55%.
Powder agglomates after reduction is packed after crossing 150 mesh screens after hammer crushing crusher machine.
And its preparation process is: the stock being formulated being placed in intermediate frequency furnace, heat temperature raising, fusion process is protected using nitrogen
The molten steel of melting, after raw material melt completely, is kept the temperature 5 minutes at 1700 DEG C, then by molten steel with 30 kg p ms by shield
Flow through bottom pour ladle bottom leak hole flow down into atomization bucket in, water flow molten steel atomization procedure is carried out under the pressure of 30Mpa, in mist
It is protected during change using nitrogen, nitrogen pressure 0.3Mpa.Slurry after atomization is dehydrated, vacuum dried processing
Afterwards, it is restored in the steel belt reduction furnace for being passed through decomposed ammonia, reduction temperature is 700 DEG C, 30 cubic metres of decomposed ammonia flow
Per hour, the powder agglomates after reduction is packed after 150 mesh screens through hammer crushing crusher machine.
Resulting product powder property are as follows: size distribution ratio is 100 microns or more granule contents 3%；45 microns to 100
Micron particles content 50%；45 microns or less granule contents are 47%.Apparent density is 2.9g/cm3, oxygen content 1400ppm.
Above-described embodiment is the description of the invention, is not limitation of the invention, any pair of simple transformation of the invention
Structure, technique afterwards all belongs to the scope of protection of the present invention.
Claims (1)
1. a kind of preparation method of soft magnetic composite powder material, it is characterized in that the weight percentage comprising following powdered elemental:
84~89%Mn, 5.5~6.5%N, 2.0~4.0%Nb, 1.5~2.0%Ce, 2.0~3.0%Mo；Its process is by former material
Material is placed in intermediate frequency furnace by formula rate stock, heat temperature raising, and fusion process uses nitrogen protection, is melted completely to raw material
Afterwards, then by molten steel with 20~double centner flow per minute hydraulic atomized process is carried out, is carried out in atomization process using nitrogen
Protection, the slurry after atomization are dehydrated, then vacuum dried rear progress reduction treatment, and 600~800 DEG C of reduction temperature, ammonia point
It solves 30~40 cubic metres of throughput per hour, the powder agglomates after reduction is crushed, packed after crossing 150 mesh screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711205002.4A CN109841401A (en) | 2017-11-27 | 2017-11-27 | A kind of preparation method of soft magnetic composite powder material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711205002.4A CN109841401A (en) | 2017-11-27 | 2017-11-27 | A kind of preparation method of soft magnetic composite powder material |
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| CN109841401A true CN109841401A (en) | 2019-06-04 |
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| CN201711205002.4A Pending CN109841401A (en) | 2017-11-27 | 2017-11-27 | A kind of preparation method of soft magnetic composite powder material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951668A (en) * | 2022-05-31 | 2022-08-30 | 清远市晶瑞合金材料有限公司 | Soft magnetic powder for 3D printing and preparation method thereof |
-
2017
- 2017-11-27 CN CN201711205002.4A patent/CN109841401A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951668A (en) * | 2022-05-31 | 2022-08-30 | 清远市晶瑞合金材料有限公司 | Soft magnetic powder for 3D printing and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190604 |
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| WD01 | Invention patent application deemed withdrawn after publication |