CN107731439A - A kind of dust core material and its manufacture method - Google Patents
A kind of dust core material and its manufacture method Download PDFInfo
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- CN107731439A CN107731439A CN201711040859.5A CN201711040859A CN107731439A CN 107731439 A CN107731439 A CN 107731439A CN 201711040859 A CN201711040859 A CN 201711040859A CN 107731439 A CN107731439 A CN 107731439A
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- core material
- dust core
- iron powder
- manufacture method
- material according
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Classifications
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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
- H01F1/032—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 hard-magnetic materials
- H01F1/04—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 hard-magnetic materials metals or alloys
- H01F1/06—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 hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/061—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 hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer
-
- 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
- B22F1/16—Metallic particles coated with a non-metal
Abstract
The invention discloses a kind of dust core material and its manufacture method, including straight iron powder, the insulating bag covering liquid containing magnesium bichromate, phosphoric acid, urea and glycerine, and lubricant；In conjunction with following steps：Step is 1.：Powder processed；Step is 2.：Reduction；Step is 3.：Insulating wrapped：Preparation and insulation processing including covering liquid；Step is 4.：It is compressing；Step is 5.：Heat treatment；Step is 6.：Postorder processing；The requirement of the high and low loss of magnetic conductivity, good frequency characteristic and temperature stability is reached, and use range is wide.
Description
Technical field
The present invention relates to material and its manufacture method, is applied to 10~400HZ of high frequency in particular to one kind and uses
, power attenuation≤65.0mW/ cm of unit volume 3Dust core material and its manufacture method.
Background technology
In the alternating current-direct current application field of soft magnetic materials, silicon steel sheet occupies very big market within a very long time, this
A little materials have excellent magnetic property in direct current, but with the popularization of exchange control mode, it is desirable to improve material in high frequency field
The magnetic property of material, the laminated type magnetic core of above-mentioned lamination silicon steel sheet type, in more than 1kHz frequency range, along with the iron of vortex
Damage will increase rapidly with increasing for frequency, which has limited its use in high frequency, so soft magnetic ferrite is used extensively
In high frequency field, this soft magnetic ferrite, although high-gradient magnetism energy is excellent, iron loss is low, is deposited compared with above-mentioned silicon steel sheet
Magnetic flux density is low the shortcomings that, bonded in view of the above-mentioned problems, proposing in recent years using phenolic resin or epoxy resin
The compressed-core of agent, soft magnetic powder is coated with organic system binding agent, though eddy-current loss can be reduced, the heat treatment temperature of magnetic core
Degree is but limited by the resin properties of composition binding agent, it is impossible to the internal stress of soft magnetic powder when eliminating shaping well, causes
The coercivity increase of magnetic core, so as to cause in high-frequency range iron loss to increase, make the frequency applications of resin-bonded powder core by
Limitation.
Currently, scientific and technological progress needs various high performance electronic devices, and higher want thus is it is also proposed to powder core
Ask, for reach high magnetic conductivity, it is low be lost, good frequency characteristic and temperature stability be, it is necessary to constantly use new material
With new technique, there is excellent magnetic property using powder core made of molybdenum permalloy powder, in miniaturization of power supply etc.
Achieve application, but the price that molybdenum permalloy is expensive, its application is largely limited, therefore devise one
Kind pure iron powder core, using the cladding process of uniqueness, there is excellent high-gradient magnetism in computer, can lead to cheap price
News device and Switching Power Supply etc. has broad application prospects in field.
The content of the invention
It is an object of the present invention to provide a kind of dust core material and its manufacture method, solves above technical problem.
In order to realize above-mentioned technical purpose, reach above-mentioned technical requirements, the technical solution adopted in the present invention is：It is a kind of
Dust core material；It is characterized in that：Including straight iron powder, the insulating bag covering liquid containing magnesium bichromate, phosphoric acid, urea and glycerine, and
Lubricant.
As preferable technical scheme：Described insulating bag covering liquid by weight percentage, magnesium bichromate 30%, phosphoric acid
For 20%, urea 10%, glycerine 40%；35%-50% of the described insulating wrapped liquid equivalent to straight iron powder volume.
As preferable technical scheme：Described lubricant is one kind in zinc stearate or calcium stearate；Described profit
8%-12% of the lubrication prescription equivalent to straight iron powder weight.
As preferable technical scheme：A kind of manufacture method of dust core material, it is characterized in that：Mainly include following step
Suddenly：
Step is 1.：Powder processed；
Step is 2.：Reduction；
Step is 3.：Insulating wrapped：Preparation and insulation processing including insulating bag covering liquid；
Step is 4.：It is compressing；
Step is 5.：Heat treatment；
Step is 6.：Postorder processing.
As preferable technical scheme：1., using gas atomization described step produces straight iron powder；Described straight iron powder is put down
Equal granularity is 5-105um, and granularmetric composition is normal distribution.
As preferable technical scheme：Described step 2., by step 1. in hydrogen of the straight iron powder at 800 DEG C -900 DEG C
In environment, after heating reductase 12 hour, sieving.
As preferable technical scheme：3. described step, the preparation of insulating bag covering liquid, adds in distilled water, by weight
The magnesium bichromate for measuring percentages is 30%, phosphoric acid 20%, urea 10%, glycerine 40%, is sufficiently mixed；Insulation processing, take
Step 2. in straight iron powder uniformly mixed in proportion with covering liquid, then stir preliminarily dried in a water bath, finally 200 DEG C-
It is stand-by after drying 1-2 hours at 300 DEG C.
As preferable technical scheme：Described step 4., step 3. after, add zinc stearate or calcium stearate, mould
Molded, pressure is 720M Pa.
As preferable technical scheme：Described step 5., step 4. after, be put into high pure nitrogen atmosphere, 550
Made annealing treatment under conditions of DEG C -600 DEG C 1 hour, then quick cooling.
As preferable technical scheme：Described step 6., including at spray painting, stabilization processes, performance detection and finished product
Reason.
The beneficial effects of the invention are as follows：A kind of dust core material and its manufacture method, including straight iron powder, containing dichromic acid
Magnesium, phosphoric acid, the insulating bag covering liquid of urea and glycerine, and lubricant；In conjunction with rational manufacture method, magnetic conductivity is reached
The requirement of high and low loss, good frequency characteristic and temperature stability, and use range is wide.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings；
In the accompanying drawings：First embodiment：
A kind of dust core material includes straight iron powder, the insulating bag covering liquid containing magnesium bichromate, phosphoric acid, urea and glycerine, Yi Jirun
Lubrication prescription；35% described of insulating wrapped liquid equivalent to straight iron powder volume；Described lubricant is in zinc stearate or calcium stearate
One kind；8% of described lubricant equivalent to straight iron powder weight；A kind of dust core material manufacturing method, mainly including following
Step：
Step is 1.：Powder processed；Straight iron powder is produced using gas atomization；Described straight iron powder particle mean size is 5um, and granularmetric composition is just
State is distributed；
Step is 2.：Reduction；By step 1. in straight iron powder in 800 DEG C of hydrogen environment, heat reductase 12 hour after, sieving, go
Except internal stress；
Step is 3.：Insulating wrapped：Preparation and insulation processing including insulating bag covering liquid；The preparation of insulating bag covering liquid, in distilled water
Middle addition, magnesium bichromate by weight percentage is 30%, phosphoric acid 20%, urea 10%, glycerine 40%, is sufficiently mixed；
Insulation processing, the straight iron powder in taking step 2. uniformly mix in proportion with covering liquid, then stir preliminarily dried in a water bath, most
It is stand-by after being dried 1 hour at 200 DEG C afterwards；Reduce eddy-current loss；
Step is 4.：It is compressing；Step 3. after, add zinc stearate or calcium stearate, compression molding, pressure 720MPa；
Step is 5.：Heat treatment；It is put into high pure nitrogen atmosphere, makes annealing treatment 1 hour under conditions of 550 DEG C, then fast quickly cooling
But；
Step is 6.：Postorder processing；Including spray painting, stabilization processes, performance detection and product handling system, the matter of final finished ensure that
Amount.
The requirement of the high and low loss of magnetic conductivity, good frequency characteristic and temperature stability is reached.
Second embodiment：
A kind of dust core material includes straight iron powder, the insulating bag covering liquid containing magnesium bichromate, phosphoric acid, urea and glycerine, Yi Jirun
Lubrication prescription；40% described of insulating wrapped liquid equivalent to straight iron powder volume；Described lubricant is in zinc stearate or calcium stearate
One kind；9.5% of described lubricant equivalent to straight iron powder weight；A kind of dust core material manufacturing method, it is main include with
Lower step：
Step is 1.：Powder processed；Straight iron powder is produced using gas atomization；Described straight iron powder particle mean size is 25um, and granularmetric composition is
Normal distribution；
Step is 2.：Reduction；By step 1. in straight iron powder in 830 DEG C of hydrogen environment, heat reductase 12 hour after, sieving, go
Except internal stress；
Step is 3.：Insulating wrapped：Preparation and insulation processing including insulating bag covering liquid；The preparation of insulating bag covering liquid, in distilled water
Middle addition, magnesium bichromate by weight percentage is 30%, phosphoric acid 20%, urea 10%, glycerine 40%, is sufficiently mixed；
Insulation processing, the straight iron powder in taking step 2. uniformly mix in proportion with covering liquid, then stir preliminarily dried in a water bath, most
It is stand-by after being dried 1.5 hours at 230 DEG C afterwards；
Step is 4.：It is compressing；Step 3. after, add zinc stearate or calcium stearate, compression molding, pressure 720MPa；
Step is 5.：Heat treatment；It is put into high pure nitrogen atmosphere, makes annealing treatment 1 hour under conditions of 570 DEG C, then fast quickly cooling
But；
Step is 6.：Postorder processing；Including spray painting, stabilization processes, performance detection and product handling system；
The requirement of the high and low loss of magnetic conductivity, good frequency characteristic and temperature stability is reached.
3rd embodiment：
A kind of dust core material includes straight iron powder, the insulating bag covering liquid containing magnesium bichromate, phosphoric acid, urea and glycerine, Yi Jirun
Lubrication prescription；45% described of insulating wrapped liquid equivalent to straight iron powder volume；Described lubricant is in zinc stearate or calcium stearate
One kind；11% of described lubricant equivalent to straight iron powder weight；A kind of dust core material manufacturing method, it is main include with
Lower step：
Step is 1.：Powder processed；Straight iron powder is produced using gas atomization；Described straight iron powder particle mean size is 80um, and granularmetric composition is
Normal distribution；
Step is 2.：Reduction；By step 1. in straight iron powder in 880 DEG C of hydrogen environment, heat reductase 12 hour after, sieving, go
Except internal stress；
Step is 3.：Insulating wrapped：Preparation and insulation processing including insulating bag covering liquid；The preparation of insulating bag covering liquid, in distilled water
Middle addition, magnesium bichromate by weight percentage is 30%, phosphoric acid 20%, urea 10%, glycerine 40%, is sufficiently mixed；
Insulation processing, the straight iron powder in taking step 2. uniformly mix in proportion with covering liquid, then stir preliminarily dried in a water bath, most
It is stand-by after being dried 1.5 hours at 280 DEG C afterwards；
Step is 4.：It is compressing；Step 3. after, add zinc stearate or calcium stearate, compression molding, pressure 720MPa；
Step is 5.：Heat treatment；It is put into high pure nitrogen atmosphere, makes annealing treatment 1 hour under conditions of 590 DEG C, then fast quickly cooling
But；
Step is 6.：Postorder processing；Including spray painting, stabilization processes, performance detection and product handling system；
The requirement of the high and low loss of magnetic conductivity, good frequency characteristic and temperature stability is reached.
Fourth embodiment：
A kind of dust core material includes straight iron powder, the insulating bag covering liquid containing magnesium bichromate, phosphoric acid, urea and glycerine, Yi Jirun
Lubrication prescription；50% described of insulating wrapped liquid equivalent to straight iron powder volume；Described lubricant is in zinc stearate or calcium stearate
One kind；12% of described lubricant equivalent to straight iron powder weight；A kind of dust core material manufacturing method, it is main include with
Lower step：
Step is 1.：Powder processed；Straight iron powder is produced using gas atomization；Described straight iron powder particle mean size is 105um, and granularmetric composition is
Normal distribution；
Step is 2.：Reduction；By step 1. in straight iron powder in 900 DEG C of hydrogen environment, heat reductase 12 hour after, sieving, go
Except internal stress；
Step is 3.：Insulating wrapped：Preparation and insulation processing including insulating bag covering liquid；The preparation of insulating bag covering liquid, in distilled water
Middle addition, magnesium bichromate by weight percentage is 30%, phosphoric acid 20%, urea 10%, glycerine 40%, is sufficiently mixed；
Insulation processing, the straight iron powder in taking step 2. uniformly mix in proportion with covering liquid, then stir preliminarily dried in a water bath, most
It is stand-by after being dried 2 hours at 300 DEG C afterwards；
Step is 4.：It is compressing；Step 3. after, add zinc stearate or calcium stearate, compression molding, pressure 720MPa；
Step is 5.：Heat treatment；It is put into high pure nitrogen atmosphere, makes annealing treatment 1 hour under conditions of 600 DEG C, then fast quickly cooling
But；
Step is 6.：Postorder processing；Including spray painting, stabilization processes, performance detection and product handling system；
The requirement of the high and low loss of magnetic conductivity, good frequency characteristic and temperature stability is reached.
The specific implementation of the present invention：After treated straight iron powder is pressed into ferrocart core, being not required to vacuum heat can also obtain
Preferable high frequency property, i.e., under 200kHz, the ratio between induction reactance and loss resistance Q are 17~23, relative permeability Ur=65, and
Can be approximately constant and magnetic conductivity varies less in 10~200kHz.
Above-described embodiment is only intended to clearly illustrate the description that the present invention is made, and is not the restriction to embodiment,
To those of ordinary skill in the art, other various forms of changes or change can also be made on the basis of the above description
Dynamic, there is no necessity and possibility to exhaust all the enbodiments, and the obvious change or change thus amplified out
Among moving still in protection scope of the present invention.
Claims (10)
- A kind of 1. dust core material；It is characterized in that：Including straight iron powder, the insulating bag containing magnesium bichromate, phosphoric acid, urea and glycerine Covering liquid, and lubricant.
- 2. a kind of dust core material according to claim 1, it is characterized in that：Described insulating wrapped liquid is equivalent to pure iron The 35%-50% of powder product.
- 3. a kind of dust core material according to claim 1, it is characterized in that：Described lubricant is zinc stearate or hard One kind in resin acid calcium；8%-12% of the described lubricant equivalent to straight iron powder weight.
- 4. a kind of manufacture method of dust core material according to claim 1, it is characterized in that：Mainly include following step Suddenly：Step is 1.：Powder processed；Step is 2.：Reduction；Step is 3.：Insulating wrapped：Preparation and insulation processing including insulating bag covering liquid；Step is 4.：It is compressing；Step is 5.：Heat treatment；Step is 6.：Postorder processing.
- 5. a kind of manufacture method of dust core material according to claim 4, it is characterized in that：1. described step, is adopted Straight iron powder is produced with gas atomization；Described straight iron powder particle mean size is 5-105um, and granularmetric composition is normal distribution.
- 6. a kind of manufacture method of dust core material according to claim 4, it is characterized in that：Described step 2., will Step 1. in straight iron powder in 800 DEG C -900 DEG C of hydrogen environment, heat reductase 12 hour after, sieving.
- 7. a kind of manufacture method of dust core material according to claim 4, it is characterized in that：Described step 3., absolutely The preparation of edge covering liquid, is added in distilled water, and magnesium bichromate by weight percentage is 30%, phosphoric acid 20%, and urea is 10%, glycerine 40%, it is sufficiently mixed；Insulation processing, the straight iron powder in taking step 2. uniformly mix in proportion with covering liquid, then Preliminarily dried is stirred in a water bath, it is stand-by after finally drying 1-2 hours at 200 DEG C -300 DEG C.
- 8. a kind of manufacture method of dust core material according to claim 4, it is characterized in that：Described step 4., Step 3. after, it is 720M Pa to add zinc stearate or calcium stearate, compression molding, pressure.
- 9. a kind of manufacture method of dust core material according to claim 4, it is characterized in that：Described step 5., Step 4. after, be put into high pure nitrogen atmosphere, make annealing treatment 1 hour under conditions of 550 DEG C -600 DEG C, then quick cooling.
- 10. a kind of manufacture method of dust core material according to claim 4, it is characterized in that：6. described step, is wrapped Include spray painting, stabilization processes, performance detection and product handling system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711040859.5A CN107731439A (en) | 2017-10-31 | 2017-10-31 | A kind of dust core material and its manufacture method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711040859.5A CN107731439A (en) | 2017-10-31 | 2017-10-31 | A kind of dust core material and its manufacture method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1622231A (en) * | 2003-11-27 | 2005-06-01 | 中南大学 | High-frequency low magnetic permeability low loss magnetic powder core and preparing method thereof |
| JP2013243268A (en) * | 2012-05-21 | 2013-12-05 | Hitachi Chemical Co Ltd | Dust core, coated metal powder for dust core, and methods for producing them |
| CN105009230A (en) * | 2013-03-08 | 2015-10-28 | Ntn株式会社 | Magnetic core powder, powder magnetic core, and method for producing magnetic core powder and powder magnetic core |
-
2017
- 2017-10-31 CN CN201711040859.5A patent/CN107731439A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1622231A (en) * | 2003-11-27 | 2005-06-01 | 中南大学 | High-frequency low magnetic permeability low loss magnetic powder core and preparing method thereof |
| JP2013243268A (en) * | 2012-05-21 | 2013-12-05 | Hitachi Chemical Co Ltd | Dust core, coated metal powder for dust core, and methods for producing them |
| CN105009230A (en) * | 2013-03-08 | 2015-10-28 | Ntn株式会社 | Magnetic core powder, powder magnetic core, and method for producing magnetic core powder and powder magnetic core |
Non-Patent Citations (2)
| Title |
|---|
| 刘咏: "《粉末冶金钛基结构材料》", 31 May 2012 * |
| 美国金属学会: "《金属手册 第9版 第7卷 粉末冶金》", 30 June 1994 * |
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Application publication date: 20180223 |
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