CN106920622A - A kind of preparation technology of high-performance SMC soft-magnetic composite materials - Google Patents
A kind of preparation technology of high-performance SMC soft-magnetic composite materials Download PDFInfo
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- CN106920622A CN106920622A CN201710211750.7A CN201710211750A CN106920622A CN 106920622 A CN106920622 A CN 106920622A CN 201710211750 A CN201710211750 A CN 201710211750A CN 106920622 A CN106920622 A CN 106920622A
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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
- H01F1/20—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 in the form of particles, e.g. powder
- H01F1/22—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 in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—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 in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
-
- 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
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a kind of preparation technology of high-performance SMC soft-magnetic composite materials, comprise the following steps：The grading of powder, powder insulating wrapped are processed, the acidic silicasol from 5 10 nanometers and nanoscale MgO dielectrics cladding treatment powder, compression molding, product are toasted and product surface insulation processing；Main advantages of the present invention are, using high-purity atomized iron powder, to be well mixed according to certain ratio after carrying out grading, using 5 10 nanometers of acidic silicasols and nanoscale MgO dielectric materials cladding treatment powder；Surface contact between powder particles is good, frictional force between powder powder reduces, mobility is fine, in the die cavity that powder easily flows into rapidly mould in shaping compacting, and the collocation of different powder particles, be not in bridging phenomenon in die cavity is filled to, the green density and mechanical strength of product are improved, and reduce product in the thermal expansion phenomenon caused by compressing and subsequent high temperature annealing process.
Description
Technical field
Present invention relates in general to magnetic material metallurgical technology field；More specifically, the invention particularly relates to a kind of property high
The preparation technology of energy SMC (Soft Magnetic Composite) soft-magnetic composite material.
Background technology
Soft-magnetic composite material (Soft magnetic composites, SMC) is by ferromagnetic particle Surface coating electricity
Insulation film and the class electromagnetic application material that obtains；Compared with traditional lamination steel magnetic core, prepared using powder metallurgical technique
SMC magnetic cores there are a series of performances of uniquenesses, including Three-Dimensional Isotropic magnetic property, low-down eddy-current loss, medium-high frequency
Relatively low total losses and the design of flexible core structure etc. under rate, it is adaptable to the motor of complex shape and magnetic circuit, can be greatly reduced
The weight and volume of magnetic core, such as motor in axial magnetic field, horizontal magnetic field motor etc., its magnetic circuit generally by three-dimensional mould into
Type, can be pressed into the iron core member of any shape, can form some magnetic structures that silicon steel can not or be extremely difficult to, it is adaptable to multiple
The motor of miscellaneous shape and magnetic circuit, such as motor in axial magnetic field, horizontal magnetic field motor etc., its magnetic circuit are usually three-dimensional, and use silicon steel
Production difficulty is larger, and compound soft magnetic material is easily reclaimed in addition, relatively more environmentally friendly, and Japan is stopped using SMC material production ABS at present
Vehicle and horse reach；And research of the China to SMC compound soft magnetic materials is less；For this SMC material has broad application prospects.
Current conventional soft magnetic composite method for coating, mainly to ferrous powder granules surface phosphoric acid, makes its particle table
Face forms one layer of phosphatic insulating barrier to lift resistivity, but clad environmental pollution containing P or S is serious.Using inorganic
The thermal coefficient of expansion of insulating barrier and magnetic differs larger and inorganic insulation layer the thermal coefficient of expansion of itself can not be changed, in the temperature difference
Larger environment or thermal stress can be produced in magnetic during long-time use, cause the soft magnetism of inorganic matter clad to be answered
Condensation material cannot have excellent magnetic property.These problems all govern the development and application of soft-magnetic composite material.
Number of patent application discloses a kind of high-performance soft-magnetic composite material for the patent of invention of CN201410382146.7
Preparation method, including the step such as the grinding of the sorting proportioning of iron powder, insulating wrapped, compressing, high annealing, ternary, impregnation, baking
Suddenly.Needle pattern or Double-peak Phenomenon are prevented effectively from using high-purity water atomized iron powder and carbonyl iron dust mixing, while normal distribution is good
It is good, effectively improve the pressed density of iron core component.
But hydroxy iron powder price is high, cost increase can be caused, simultaneously because the hydroxy iron powder granularity very little for being used, ultra-fine
The addition of powder can fill dense degree and flow rate effect, Specific Surface Area Measurement increase to the pine for causing powder, and suppress meeting in shaping
Mould clamping is caused, so as to cause mould to pull, and briquettability is bad.
The content of the invention
Instant invention overcomes the deficiency in the presence of above-mentioned prior art, preparation process is effectively removed by the method annealed
In residual stress, and the thermal coefficient of expansion of inorganic insulation layer and magnetic differs larger problem, and providing one kind can prevent
Only powder aoxidizes and reduces the high-performance SMC soft magnetisms of the caused thermal expansion phenomenon in pressing process and annealing process of product
The preparation technology of composite, the technique makes to protect mould on the premise of product briquettability is good, does not result in clamping.
The technical proposal of the invention is realized in this way：
A kind of preparation technology of high-performance SMC soft-magnetic composite materials, comprises the following steps：
(1), the grading of powder：From carbon content≤0.01% of mass percent, oxygen content≤0.15%, sulphur contains
Amount≤0.014%, manganese content≤0.14%, remaining is iron content and apparent density of powder is 2.9~3.4g/cm3Water atomization
Iron powder, three kinds of powder of fineness below -80~+200 mesh, -150~+200 mesh, -325 mesh are divided into by Powder screen, and by the sieve
The three kinds of powder of fineness for having divided are according to quality proportioning (1~2):(2~3):(1~0.5) it is well mixed；
(2), powder insulating wrapped treatment：At acidic silicasol and nanoscale MgO dielectric claddings from 5-10 nanometers
Reason powder, the iron powder after will being well mixed is with acidic silicasol, nanoscale MgO according to mass percent (96~99)：(0.4
~1.5)：The ratio of (0.4~1.0) is well mixed under the protection of argon gas, then to adding quality in the powder for having coated
Percentage is 0.2~0.8 lubricant；
(3), compression molding；The good powder of above-mentioned cladding is inserted in former mold cavity, floating is carried out and is pressed into
Type, briquetting pressure controls 600~800Mpa, and shaping compacting total time is 8~10s/pcs；Former uses 100t liquid
Press is suppressed, the not repressurization after 4~6s is suppressed, and carries out 2~4s of pressurize, the product demoulding again；
(4), product baking：Product to suppressing directly is toasted in atmosphere, baking temperature control 500~
530 DEG C or so, soaking time is controlled in 30~60min；
(5), product surface insulation processing：Product after baking is carried out into centrifugation dry grinding and concentration carries out deburring
Afterwards, after coating or carry out cathodic electrophoretic coating insulation processing using the electrostatic spraying of epoxy resin powder, at 120~150 DEG C
At a temperature of toast 15~30min.
Preferably, the lubricant used in step (2) is in zinc stearate, lithium stearate, calcium stearate, Chinese wax
The mixing of one or more.
Employing design starting point of the invention, theory and the beneficial effect of above-mentioned technical proposal is：
A kind of preparation technology of high-performance SMC soft-magnetic composite materials of the invention, its major advantage is to use high-purity
Atomized iron powder, carries out, acidic silicasol and nanometer using 5-10 nanometer well mixed according to certain ratio after grading
Level MgO dielectric material cladding treatment powders；The advantage is that：
1. carry out being arranged in pairs or groups according to different powder particles using high-purity water atomized iron powder, the surface between powder particles connects
Touch good, the frictional force between powder powder reduces, very well, powder easily flows into rapidly mould to mobility when compacting is molded
In die cavity, and different powder particles collocation, be not in bridging phenomenon, the small particle meeting of powder particles in die cavity is filled to
It is filled between bulky grain, so that product powder compression performance is more preferably, the green density and mechanical strength of product are improved,
It is more suitable for suppressing the complex-shaped part of SMC electric machineries；
2. it is the thermal expansion of residual stress and inorganic insulation layer and magnetic in solution soft magnetism SMC composite preparation process
Coefficient differs larger problem, and this technique processes powder using acidic silicasol and nanoscale MgO the dielectric materials cladding of nanometer
Powder cladding is carried out under argon gas protection, the oxidation of powder is prevented, the eddy-current loss of material is reduced, and reduces product in compacting
Thermal expansion phenomenon caused by shaping and subsequent high temperature annealing process.
Brief description of the drawings
Fig. 1 is basic magnetization and the permeability curcve figure of products obtained therefrom in embodiment 1；
Fig. 2 is the static hysteresis loop and fundamental magnetization curve figure of products obtained therefrom in embodiment 1.
Specific embodiment
Specific embodiment of the invention is as follows：
Embodiment：A kind of high-performance soft magnetism composite S MC material fabrication process and method, comprise the following steps：
(1) Powder screen distribution ratio：To be 0.005% from carbon content, oxygen content is 0.1%, and sulfur content is 0.01%, manganese
Content is 0.1%, and remaining is iron content and apparent density of powder is 3g/cm3Water-atomized iron powder, by Powder screen be divided into 100 mesh,
150 mesh, three kinds of powder of fineness of -400 mesh, and by the three kinds of powder of fineness for having sieved according to quality proportioning 1.5:2:
0.8 ratio is well mixed；
(2) powder insulation processing：Acidic silicasol and nanoscale MgO dielectrics cladding treatment powder from 8 nanometers, i.e.,
Iron powder after will be well mixed is with acidic silicasol, nanoscale MgO according to mass percent 98.5：0.6：0.5 ratio is in argon
It is well mixed under the protection of gas, then to the lubricant that addition mass percent in the powder for having coated is 0.4；Used
Lubricant is the mixture of zinc stearate and Chinese wax；
(3) it is compressing：The powder that will be prepared is inserted in the Alloy-steel mold of annular, is pressed into Φ 26.8mm × Φ
The standard specimen of 14.8mm × H14.35mm, briquetting pressure is 800Mpa to the maximum, is suppressed using floating in 500Mpa, and lifting product is close
Degree；Former uses 100t hydraulic presses and is suppressed, the not repressurization after 4s is suppressed, and carries out pressurize 2s, and product takes off again
Mould；
(4) product baking：Product to suppressing directly is toasted in atmosphere, and baking temperature is controlled at 500 DEG C, is protected
Warm time control is in 30min；
(5) product surface insulation processing：By the product after baking carry out centrifugation dry grinding and concentrate carry out deburring after,
After coating or carry out cathodic electrophoretic coating insulation processing using the electrostatic spraying of epoxy resin powder, product is preheating to 120 DEG C
When, product carries out electrostatic spraying and carries out coated insulation in epoxy resin powder fluid bed, is toasted at a temperature of 80 DEG C
15min。
Density through using Archimedes principle test product is 7.47g/cm3, the characteristic of product is as follows：
| Maximum permeability | Effective permeability | Loss (W/Kg) | Magnetic flux (mT) | |
| Test value | 553 | 269 | 126 | 1355 |
The annular standard specimen suppressed more than, the product performance tested and can be seen that with reference to Fig. 1, Fig. 2：This material has
Preferably magnetic conductivity, low-loss, flux value characteristic higher, this material disclosure satisfy that the motor applied in existing market substantially
The application requirement of stator, the product performance of vapour ignition coil for vehicle, and have more excellent 3-dimensional magnetic conduction directional characteristic.
Embodiment 2：A kind of preparation technology of high-performance SMC soft-magnetic composite materials, comprises the following steps：
(1), the grading of powder：From carbon content≤0.01% of mass percent, oxygen content≤0.15%, sulphur contains
Amount≤0.014%, manganese content≤0.14%, remaining is iron content and apparent density of powder is 3.2g/cm3Water-atomized iron powder,
Powder screen is divided into -60~100 mesh, -80~150 mesh, three kinds of powder of fineness of -350 mesh, and three kinds for having sieved are thin
The powder of degree is according to quality proportioning 1.5:1.5:0.5 is well mixed；
(2), powder insulating wrapped treatment：At acidic silicasol and nanoscale MgO dielectric claddings from 5-10 nanometers
Reason powder, the iron powder after will being well mixed is with acidic silicasol, nanoscale MgO according to mass percent 98：0.8：0.7 ratio
Example is well mixed under the protection of argon gas, then to the lubricant that addition mass percent in the powder for having coated is 0.5；Institute
The lubricant for using is the mixture of zinc stearate and Chinese wax；
(3), compression molding；The powder that will be prepared is inserted in the Alloy-steel mold of compacting motor stator, and briquetting pressure is most
Greatly 800Mpa, is suppressed in 500Mpa using floating, and lifts product density；
(4), product baking：Product to suppressing directly is toasted in atmosphere, and baking temperature is controlled at 520 DEG C,
Soaking time is controlled in 50min；
(5), product surface insulation processing：Product after baking is carried out into centrifugation dry grinding and concentration carries out deburring
Afterwards, when product being preheating into 120 DEG C, product carries out electrostatic spraying and carries out coated insulation in epoxy resin powder fluid bed,
15min is toasted at a temperature of 80 DEG C.
Density through using Archimedes principle test product is 7.45g/cm3, the electromagnetic property of motor stator product is such as
Under：
The requirement of this stator motor product performance, after being optimized to magnetic circuit when motor is designed, can replace existing
Traditional silicon steel sheet stator core, the attendant advantages of this SMC material technology are in can allow more flexible design and complicated three-dimensional
The manufacture of (3D) isotropism core assembly, while scrap iron material will not be produced in the manufacturing process of soft magnetism iron core.
Claims (2)
1. a kind of preparation technology of high-performance SMC soft-magnetic composite materials, it is characterized in that comprising the following steps：
(1), the grading of powder：From carbon content≤0.01% of mass percent, oxygen content≤0.15%, sulfur content≤
0.014%, manganese content≤0.14%, remaining is iron content and apparent density of powder is 2.9~3.4g/cm3Water-atomized iron powder,
Powder screen is divided into three kinds of powder of fineness below -80~+200 mesh, -150~+200 mesh, -325 mesh, and is sieved described
Three kinds of powder of fineness according to quality proportioning (1~2):(2~3):(1~0.5) it is well mixed；
(2), powder insulating wrapped treatment：Acidic silicasol and nanoscale MgO dielectrics cladding treatment powder from 5-10 nanometers
Material, the iron powder after will being well mixed is with acidic silicasol, nanoscale MgO according to mass percent (96~99)：(0.4~
1.5)：The ratio of (0.4~1.0) is well mixed under the protection of argon gas, then to addition quality hundred in the powder for having coated
Divide than the lubricant for 0.2~0.8；
(3), compression molding；The good powder of above-mentioned cladding is inserted in the die cavity of former, compressing, shaping of floating is carried out
600~800Mpa of Stress control, shaping compacting total time is 8~10s/pcs；
(4), product baking：Product to suppressing directly is toasted in atmosphere, and baking temperature is controlled at 500~530 DEG C,
Soaking time is controlled in 30~60min；
(5), product surface insulation processing：By the product after baking carry out centrifugation dry grinding and concentrate carry out deburring after, adopt
After being coated or carried out cathodic electrophoretic coating insulation processing with the electrostatic spraying of epoxy resin powder, at a temperature of 120~150 DEG C
15~30min of baking.
2. the preparation technology of a kind of high-performance SMC soft-magnetic composite materials according to claim 1, it is characterised in that：Step
(2) lubricant used in is the mixing of one or more in zinc stearate, lithium stearate, calcium stearate, Chinese wax.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516567A (en) * | 2017-10-17 | 2017-12-26 | 苏州南尔材料科技有限公司 | A kind of preparation method of the Ni-based soft magnetic materials of surface treated iron |
| CN107680769A (en) * | 2017-10-17 | 2018-02-09 | 苏州南尔材料科技有限公司 | A kind of preparation method of the soft magnetic bodies with ceramic coating |
| CN109300683A (en) * | 2018-12-17 | 2019-02-01 | 瞿凌飞 | A kind of preparation method of iron-based soft magnetic composite cores |
| CN109456049A (en) * | 2018-12-17 | 2019-03-12 | 戴爱娟 | A kind of preparation method of high-performance soft magnetic materials |
| CN109585154A (en) * | 2018-12-17 | 2019-04-05 | 戴爱娟 | A kind of preparation method for the iron nickel composite cores being coated processing |
| CN111029076A (en) * | 2020-01-15 | 2020-04-17 | 合肥工业大学 | Gas atomization iron-silicon-aluminum soft magnetic composite material with low intermediate frequency loss |
| CN111524697A (en) * | 2020-04-20 | 2020-08-11 | 东莞市铭燕电子有限公司 | Preparation method of 35 carbonyl iron powder core with magnetic conductivity |
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| WO2014136587A1 (en) * | 2013-03-08 | 2014-09-12 | Ntn株式会社 | Magnetic core powder, powder magnetic core, and method for producing magnetic core powder and powder magnetic core |
| CN104157389A (en) * | 2014-08-06 | 2014-11-19 | 江西磁姆新材料科技有限公司 | Preparing method of high-performance soft magnetism composite materials |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516567A (en) * | 2017-10-17 | 2017-12-26 | 苏州南尔材料科技有限公司 | A kind of preparation method of the Ni-based soft magnetic materials of surface treated iron |
| CN107680769A (en) * | 2017-10-17 | 2018-02-09 | 苏州南尔材料科技有限公司 | A kind of preparation method of the soft magnetic bodies with ceramic coating |
| CN109300683A (en) * | 2018-12-17 | 2019-02-01 | 瞿凌飞 | A kind of preparation method of iron-based soft magnetic composite cores |
| CN109456049A (en) * | 2018-12-17 | 2019-03-12 | 戴爱娟 | A kind of preparation method of high-performance soft magnetic materials |
| CN109585154A (en) * | 2018-12-17 | 2019-04-05 | 戴爱娟 | A kind of preparation method for the iron nickel composite cores being coated processing |
| CN111029076A (en) * | 2020-01-15 | 2020-04-17 | 合肥工业大学 | Gas atomization iron-silicon-aluminum soft magnetic composite material with low intermediate frequency loss |
| CN111029076B (en) * | 2020-01-15 | 2021-03-30 | 合肥工业大学 | Gas atomization iron-silicon-aluminum soft magnetic composite material with low intermediate frequency loss |
| CN111524697A (en) * | 2020-04-20 | 2020-08-11 | 东莞市铭燕电子有限公司 | Preparation method of 35 carbonyl iron powder core with magnetic conductivity |
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