CN105023743B - Manufacturing method of composite-structure iron powder core green body and manufacturing method of composite-structure iron powder core - Google Patents
Manufacturing method of composite-structure iron powder core green body and manufacturing method of composite-structure iron powder core Download PDFInfo
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Abstract
The invention discloses a manufacturing method of a composite-structure iron powder core green body and a manufacturing method of a composite-structure iron powder core. The composite-structure iron powder core green body is composed of three layers, wherein the upper layer and the lower layer are formed by use of glass powder granules by pressing, and the middle layer between the upper layer and the lower layer is formed by use of metal powder granules by pressing; the method comprises the following steps: (1) preparing the glass powder granules and the metal powder granules; (2) pressing layer by layer at a temperature within the range of 20-120 DEG C, performing primary pre-pressing after lower layer packing, and then packing the middle layer and performing secondary pre-pressing, and finally, packing the upper layer and performing final pressing to obtain a composite-structure iron powder core coarse green body, wherein the pressure of the primary pre-pressing ranges from 400 to 900 MPa, the pressure of the secondary pre-pressing ranges from 500 to 1000 MPa and the pressure of the final pressing ranges from 800 to 1800 MPa, and moreover, the pressure of the secondary pre-pressing is greater than the pressure of the primary pre-pressing and smaller than the pressure of the final pressing; and (3) cutting and processing the composite-structure iron powder core coarse green body according to a predetermined shape to obtain the composite-structure iron powder core green body. The product formed by use of the manufacturing method of the composite-structure iron powder core green body is relatively high in insulation resistance and inductance.
Description
Technical field
The present invention relates to the manufacture of composite construction ferrocart core, more particularly to a kind of composite construction ferrocart core base substrate manufacturer
Method and composite construction iron powder core, manufacturing method.
Background technology
At present, with the continuous upgrading of circuit, the electronic component in circuit requires electric current higher, needs pcrmeability high, full
Decline little magneticss with pcrmeability after magnetic flux density height, extra current bias field.Metallic magnet opposing ferrite magnet has
Higher saturation flux density, metal material is taken as the material of main part of magnet as new use object.But produce with electronics
The miniaturization of product, lightening development are it is desirable to electronic component also miniaturization, lightening therewith.However as the miniaturization of magnet, gold
In genus material, often the metal iron powder core insulation impedance based on sintering is low, with glue bonding for solidification side for the material of high magnetic permeability
Formula there is aging risk and mechanical strength is low, pcrmeability is low.
Content of the invention
The technical problem to be solved is: makes up above-mentioned the deficiencies in the prior art, proposes a kind of composite construction ferrum
Powder core base substrate manufacture method and composite construction iron powder core, manufacturing method.
The technical problem of the present invention is solved by following technical scheme:
A kind of manufacture method of composite construction ferrocart core base substrate, described composite construction ferrocart core base substrate by up of three layers, its
Formed by the compacting of glass powder particles material with lower floor at the middle and upper levels, be folded in intermediate layer between described the upper and lower by metal powder
Pellet compacting forms, and described manufacture method comprises the following steps:
(1) described glass powder particles material and described metal powder particulate material are prepared；
(2) suppress in 20-120 DEG C of lower leaf, after the glass powder particles material filling of lower floor, carry out first time precompressed, described
The metal powder particulate material filling intermediate layer after first time precompressed carries out second precompressed, finally fills the glass powder particles material on upper strata
Finally suppressed, made composite construction ferrocart core crude green body body, wherein, the pressure of described first time precompressed is 400～900mpa,
The pressure of described second precompressed is 500～1000mpa, and the pressure of described final compacting is 800～1800mpa, and described the
The pressure of secondary precompressed is more than pressure the pressure less than described final compacting of described first time precompressed；
(3) described composite construction ferrocart core crude green body body is pressed reservation shape machining, described composite construction iron powder is obtained
Core base substrate.
Preferably, in described step (2), the pressure of described first time precompressed is 400～500mpa, described second precompressed
Pressure be 500～600mpa, the pressure of described final compacting is 1200～1800mpa.
Preferably, the binding agent of the glass dust by 95wt%～99wt% for the described glass powder particles material and 1wt%～5wt%
Mixing granulation is made, and described glass dust includes each component of following percentage by weight: 50%～60% silicon dioxide, 20%～
25% calcium oxide and 20%～25% Barium monoxide, described binding agent includes each component of following percentage by weight: acetic acid third
Ester 65%～90%, polyvinyl butyral 5%～25%, dibutyl phthalate 1%～3% and triglyceride 2%
～8%.
Preferably, the binding agent of the metal powder by 95wt%～99wt% for the described metal powder particulate material and 1wt%～5wt%
Mixing granulation is made, and described metal powder includes each component of following percentage by weight: ferrum 45%～55% and nickel 45%～55%,
Described binding agent includes each component of following percentage by weight: propyl acetate 65%～90%, polyvinyl butyral 5%～
25%th, dibutyl phthalate 1%～3% and triglyceride 2%～8%.
A kind of manufacture method of composite construction ferrocart core, the manufacture method according to described composite construction ferrocart core base substrate is obtained
Described composite construction ferrocart core base substrate；Described composite construction ferrocart core base substrate is sequentially passed through and after dumping and annealing, institute is obtained
State composite construction ferrocart core.
Preferably, described dumping and annealing comprise the following steps:
Temperature rise period: make temperature rise to 250～300 DEG C from 20-30 DEG C with the heating rate of 0.1～0.5 DEG C/min, wait to glue
After knot agent is discharged, it is continuously heating to 400～450 DEG C with the heating rate of 0.5～1.5 DEG C/min；
Holding stage: be incubated 0.5～2h at a temperature of described 400～450 DEG C；
Temperature-fall period: after the completion of described holding stage, lowered the temperature with the cooldown rate of 5.0～10.0 DEG C/min.
Preferably, described dumping and annealing are all carried out in natural air.
The composite construction ferrocart core base substrate that a kind of manufacture method by described composite construction ferrocart core base substrate manufactures.
The composite construction ferrocart core that a kind of manufacture method by described composite construction ferrocart core manufactures.
The beneficial effect that the present invention is compared with the prior art is: the present invention can be solved well using the multiple molded technique of multilamellar
The problem of the never composite construction ferrocart core molding of same material, also guaranteed to the concordance of product, it is high to have production efficiency, can
Produced with continuous compacting, automaticity is higher, manually less the advantages of, and the bond strength of product is high, structure is homogeneous, by this
The composite construction ferrocart core of inventive method molding, the bond strength of different materials interlayer is high, multiple molded product surface insulation
Impedance > 1000m ω, and common iron powder core insulation resistance is 10～100m ω, by the composite construction of method of the present invention molding
Ferrocart core inductance value reaches 4.7～5.2 μ h, and common iron powder core inductance value is 4.0～4.3 μ h.
Brief description
Fig. 1 is the cross-sectional of the composite construction ferrocart core crude green body body through layering compacting aftershaping of one embodiment of the invention
View；
Fig. 2 is the resected rear composite construction iron powder being formed of composite construction ferrocart core crude green body body of one embodiment of the invention
The sectional elevation of core base substrate.
Specific embodiment
With reference to specific embodiment and compare accompanying drawing the present invention is described in further details.
The present invention provides a kind of manufacture method of composite construction ferrocart core base substrate, in a specific embodiment, as Fig. 2 institute
Show, composite construction ferrocart core base substrate by up of three layers, its at the middle and upper levels 2 and lower floor 3 by glass powder particles material compacting form, be folded in
Intermediate layer 1 between described the upper and lower is formed by the compacting of metal powder particulate material, and manufacture method comprises the steps:
(1) described glass powder particles material and described metal powder particulate material are prepared.
(2) suppress in 20-120 DEG C of lower leaf, after the glass powder particles material filling of lower floor 3, carry out first time precompressed, in institute
The metal powder particulate material filling intermediate layer 1 after stating first time precompressed carries out second precompressed, finally fills the glass dust on upper strata 2
Pellet is finally suppressed, and makes composite construction ferrocart core crude green body body, as shown in figure 1, wherein, the pressure of described first time precompressed
For 400～900mpa, the pressure of described second precompressed is 500～1000mpa, the pressure of described final compacting is 800～
1800mpa, and the pressure of described second precompressed is more than pressure the pressure less than described final compacting of described first time precompressed
Power；In layering compacting, carry out in the range of actual temp value ± 10 DEG C in the range of 20-120 DEG C.
(3) described composite construction ferrocart core crude green body body (is by described composite junction in this example by reservation shape machining
Structure ferrocart core crude green body body loads in cutter, cuts out the column part of base substrate using emery wheel, prepares composite construction ferrum
Powder core base substrate), the cross section view of prepared composite construction ferrocart core base substrate is as shown in Figure 2.
Wherein, layering compacting is in order that different materials can keep certain thickness, and not substantial amounts of penetrates into other
Material layer, in a preferred embodiment, inventor, on substantial amounts of experiment basis, selects the first time of composite construction interlayer
The pressure of precompressed in 400～500mpa, the pressure of second precompressed in 500～600mpa, the pressure of final compacting 1200～
During 1800mpa, different material layer adhesion is preferable for described machining effect.
Some other preferred embodiment converge in, described glass powder particles material by 95wt%～99wt% glass dust and
The binding agent mixing granulation of 1wt%～5wt% is made, and described glass dust includes each component of following percentage by weight: 50%～
The Barium monoxide of 60% silicon dioxide, 20%～25% calcium oxide and 20%～25%, described binding agent includes following weight
Each component of percentage ratio: propyl acetate 65%～90%, polyvinyl butyral 5%～25%, dibutyl phthalate 1%～
3% and triglyceride 2%～8%.Described metal powder particulate material by the metal powder of 95wt%～99wt% and 1wt%～
The binding agent mixing granulation of 5wt% is made, and described metal powder includes each component of following percentage by weight: ferrum 45%～55% He
Nickel 45%～55%, described binding agent includes each component of following percentage by weight: propyl acetate 65%～90%, polyethylene contracting
Butyraldehyde 5%～25%, dibutyl phthalate 1%～3% and triglyceride 2%～8%.
The present invention also provides a kind of manufacture method of composite construction ferrocart core, in a detailed embodiment, concrete bag
Include following steps:
The composite construction ferrocart core base substrate that manufacture method through above-described embodiment is prepared, sequentially passes through dumping and moves back
Fire processes and obtains described composite construction ferrocart core.
In a preferred embodiment, described dumping and annealing include:
Temperature rise period: make temperature rise to 250～300 DEG C from 20-30 DEG C with the heating rate of 0.1～0.5 DEG C/min, wait to glue
After knot agent is discharged, it is continuously heating to 400～450 DEG C with the heating rate of 0.5～1.5 DEG C/min；
Holding stage: be incubated 0.5～2h at a temperature of described 400～450 DEG C；
Temperature-fall period: after the completion of described holding stage, lowered the temperature with the cooldown rate of 5.0～10.0 DEG C/min.
It is further preferred that described dumping and annealing are carried out all in natural air.
Dumping, annealing directly decision composite construction ferrocart core final composition with become distributed mutually, outward appearance and performance.Dumping,
Annealing should be wanted according to Equipment for Heating Processing used, the pressing pressure of viscous metal material, the species of knot agent and additional proportion, properties of product
Ask, form and dimension, dress the aspect such as base weight and mode difference, determine suitable dumping, annealing temperature and heat treatment cycle curve,
On substantial amounts of experiment basis, in the above preferred version drawing, the temperature rise period is mainly moisture, binding agent in blank to inventor
With the volatilization process of lubricant, now must slowly heat up to avoid blank to ftracture, hereafter be the remaining object after Organic substance sintering
Progressively exclude, because this section of dumping, annealing effect bond strength between magnetic particles, oxidation depth, the uniformity, the porosity
And distribution etc., heating rate now will be suitably；To after maximum sintering temperature, insulation 0.5～2h is advisable.
By preferred sintering circuit above, product there's almost no adhesion, deformation and cracking, and the bond strength of product
Sexual satisfaction consistent with performance requires.
Below by way of more specifically embodiment, the present invention is further elaborated.
Embodiment 1
Glass powder particles material is grouped into by each group of following percentage by weight:
Glass dust 95%
Binding agent 5%
Metal powder particulate material is grouped into by the group of following percentage by weight:
Metal powder 95%
Binding agent 5%
Described glass dust is grouped into by the group of following percentage by weight:
Silicon dioxide 60%
Calcium oxide 20%
Barium monoxide 20%
Described metal powder is grouped into by the group of following percentage by weight:
Ferrum 50%
Nickel 50%
Described binding agent is grouped into by the group of following percentage by weight:
Respectively by glass dust and binding agent, and metal powder and binding agent put into stirring according to the mixing of above percentage by weight
Mix in tank, the frequency of setting agitator tank is 25hz, time 6hr, obtains granulated pellet by 30# mesh screen and obtain glass after mixing
Powder particles material and metal powder particulate material.
Described glass powder particles material and metal powder particulate material are filled in special mould according to setting order by press
In, (in this example, it is 30 DEG C) under room temperature, the glass powder particles material of precompressed lower floor under 500mpa pressure, then in the pressure of 600mpa
The metal powder particulate material of precompressed medial layer under power, then suppress the glass powder particles material on upper strata, system under the final pressure of 1800mpa
Become composite construction ferrocart core crude green body body, the thickness of each layer is by forming as follows:
Upper strata 0.05mm
Intermediate layer 1.0mm
Lower floor 0.05mm
Described composite construction ferrocart core crude green body body processes the center pillar of base substrate under the high speed rotating tool of 8000rpm, system
Obtain composite construction ferrocart core base substrate finally.
Composite construction ferrocart core base substrate is sequentially passed through and after dumping and annealing, composite construction ferrocart core is obtained, process is such as
Under:
Described dumping, sintering include:
Temperature rise period: slowly heat up, make temperature be slowly raised to 250 DEG C from room temperature with 0.5 DEG C/min of heating rate, to be bonded
After agent is discharged, with 1.0 DEG C/min of heating rate, it is continuously heating to 430 DEG C；
Holding stage: be incubated 1h at described 430 DEG C；
Temperature-fall period: after composite construction ferrocart core is burned, lowered the temperature, cooldown rate is 8 DEG C/min.
Embodiment 2
Glass powder particles material is grouped into by each group of following percentage by weight:
Glass dust 97%
Binding agent 3%
Metal powder particulate material is grouped into by the group of following percentage by weight:
Metal powder 97%
Binding agent 3%
Described glass dust is grouped into by the group of following percentage by weight:
Silicon dioxide 55%
Calcium oxide 23%
Barium monoxide 22%
Described metal powder is grouped into by the group of following percentage by weight:
Ferrum 51%
Nickel 49%
Described binding agent is grouped into by the group of following percentage by weight:
Respectively by glass dust and binding agent, and metal powder and binding agent put into stirring according to the mixing of above percentage by weight
Mix in tank, the frequency of setting agitator tank is 25hz, time 6hr, obtains granulated pellet by 30# mesh screen and obtain glass after mixing
Powder particles material and metal powder particulate material.
Described glass powder particles material and metal powder particulate material are filled in special mould according to setting order by press
In, at 60 DEG C, the glass powder particles material of precompressed lower floor under 450mpa pressure, then in the middle of precompressed under the pressure of 550mpa
The metal powder particulate material of layer, then suppress the glass powder particles material on upper strata under the final pressure of 1500mpa, the thickness of each layer is by such as
Lower composition:
Upper strata 0.08mm
Intermediate layer 0.94mm
Lower floor 0.08mm
Described composite construction ferrocart core crude green body body processes the center pillar of base substrate under the high speed rotating tool of 8000rpm, system
Obtain final composite construction ferrocart core base substrate.
Composite construction ferrocart core base substrate is sequentially passed through and after dumping and annealing, composite construction ferrocart core is obtained, process is as follows:
Described dumping, sintering include:
Temperature rise period: slowly heat up, make temperature be slowly raised to 280 DEG C from room temperature with 0.3 DEG C/min of heating rate, to be bonded
After agent is discharged, with 1.3 DEG C/min of heating rate, it is continuously heating to 450 DEG C；
Holding stage: be incubated 0.5h at described 450 DEG C；
Temperature-fall period: after composite construction ferrocart core is burned, lowered the temperature, cooldown rate is 5 DEG C/min.
Embodiment 3
Glass powder particles material is grouped into by each group of following percentage by weight:
Glass dust 98%
Binding agent 2%
Metal powder particulate material is grouped into by the group of following percentage by weight:
Metal powder 98%
Binding agent 2%
Described glass dust is grouped into by the group of following percentage by weight:
Silicon dioxide 52%
Calcium oxide 25%
Barium monoxide 22%
Described metal powder is grouped into by the group of following percentage by weight:
Ferrum 49%
Nickel 51%
Described binding agent is grouped into by the group of following percentage by weight:
Respectively by glass dust and binding agent, and metal powder and binding agent put into stirring according to the mixing of above percentage by weight
Mix in tank, the frequency of setting agitator tank is 25hz, time 6hr, obtains granulated pellet by 30# mesh screen and obtain glass after mixing
Powder particles material and metal powder particulate material.
Described glass powder particles material and metal powder particulate material are filled in special mould according to setting order by press
In, at 120 DEG C, the glass powder particles material of precompressed lower floor under 400mpa pressure, then in precompressed under the pressure of 500mpa
The metal powder particulate material of interbed, then suppress the glass powder particles material on upper strata under the final pressure of 1200mpa, the thickness of each layer by
Following composition:
Upper strata 0.10mm
Intermediate layer 0.90mm
Lower floor 0.10mm
Described composite construction ferrocart core crude green body body processes the center pillar of base substrate under the high speed rotating tool of 8000rpm, system
Obtain final composite construction ferrocart core base substrate.
Composite construction ferrocart core base substrate is sequentially passed through and after dumping and annealing, composite construction ferrocart core is obtained, process is such as
Under:
Described dumping, sintering include:
Temperature rise period: slowly heat up, make temperature be slowly raised to 300 DEG C from room temperature with 0.3 DEG C/min of heating rate, to be bonded
After agent is discharged, with 1.5 DEG C/min of heating rate, it is continuously heating to 400 DEG C；
Holding stage: be incubated 2h at described 400 DEG C；
Temperature-fall period: after composite construction ferrocart core is burned, lowered the temperature, cooldown rate is 10 DEG C/min.
The composite construction ferrocart core that above three embodiment is produced carries out performance test, with traditional method production
Metal constituent ferrocart core is contrasted, as shown in the table:
From embodiment 1-3 testing result, the insulation impedance of composite construction ferrocart core of molding of the present invention and inductance value
All good than the ferrocart core that traditional drawing method produces.
Above content is to further describe it is impossible to assert with reference to specific preferred implementation is made for the present invention
Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from make on the premise of present inventive concept some substitute or obvious modification, and performance or purposes are identical, all should be considered as
Belong to protection scope of the present invention.
Claims (9)
1. a kind of manufacture method of composite construction ferrocart core base substrate it is characterised in that: described composite construction ferrocart core base substrate is by three
Layer composition, wherein the upper and lower are formed by the compacting of glass powder particles material, are folded in the intermediate layer between described the upper and lower
Formed by the compacting of metal powder particulate material, described manufacture method comprises the following steps:
(1) described glass powder particles material and described metal powder particulate material are prepared；
(2) suppress in 20-120 DEG C of lower leaf, after the glass powder particles material filling of lower floor, carry out first time precompressed, described first
The metal powder particulate material filling intermediate layer after secondary precompressed carries out second precompressed, and finally the glass powder particles material on filling upper strata is carried out
Final compacting, makes composite construction ferrocart core crude green body body, and wherein, the pressure of described first time precompressed is 400～900mpa, described
The pressure of second precompressed is 500～1000mpa, and the pressure of described final compacting is 800～1800mpa, and described second
The pressure of precompressed is more than pressure the pressure less than described final compacting of described first time precompressed；
(3) described composite construction ferrocart core crude green body body is pressed reservation shape machining, described composite construction ferrocart core base is obtained
Body.
2. composite construction ferrocart core base substrate as claimed in claim 1 manufacture method it is characterised in that: in described step (2),
The pressure of described first time precompressed is 400～500mpa, and the pressure of described second precompressed is 500～600mpa, described final
The pressure of compacting is 1200～1800mpa.
3. composite construction ferrocart core base substrate as claimed in claim 1 or 2 manufacture method it is characterised in that: described glass dust
Particulate material is made up of the glass dust of 95wt%～99wt% and the binding agent mixing granulation of 1wt%～5wt%, described glass dust bag
Include each component of following percentage by weight: 50%～60% silicon dioxide, 20%～25% calcium oxide and 20%～25%
Barium monoxide, described binding agent includes each component of following percentage by weight: propyl acetate 65%～90%, polyvinyl butyral
5%～25%, dibutyl phthalate 1%～3% and triglyceride 2%～8%.
4. composite construction ferrocart core base substrate as claimed in claim 1 or 2 manufacture method it is characterised in that: described metal powder
Particulate material is made up of the metal powder of 95wt%～99wt% and the binding agent mixing granulation of 1wt%～5wt%, described metal powder bag
Include each component of following percentage by weight: ferrum 45%～55% and nickel 45%～55%, described binding agent includes following weight hundred
Each component of point ratio: propyl acetate 65%～90%, polyvinyl butyral 5%～25%, dibutyl phthalate 1%～
3% and triglyceride 2%～8%.
5. a kind of manufacture method of composite construction ferrocart core it is characterised in that: compound according to claim 1-4 any one
The manufacture method of structure ferrocart core base substrate is obtained described composite construction ferrocart core base substrate；By described composite construction ferrocart core base substrate according to
Secondary described composite construction ferrocart core prepared after dumping and annealing.
6. manufacture method according to claim 5 it is characterised in that: described dumping and annealing comprise the following steps:
Temperature rise period: make temperature rise to 250～300 DEG C from 20-30 DEG C with the heating rate of 0.1～0.5 DEG C/min, to be bonded dose
After discharge, it is continuously heating to 400～450 DEG C with the heating rate of 0.5～1.5 DEG C/min；
Holding stage: be incubated 0.5～2h at a temperature of described 400～450 DEG C；
Temperature-fall period: after the completion of described holding stage, lowered the temperature with the cooldown rate of 5.0～10.0 DEG C/min.
7. the manufacture method according to claim 5 or 6 it is characterised in that: described dumping and annealing be all in nature
In the air is carried out.
8. the composite construction ferrocart core base substrate that the manufacture method described in a kind of any one by claim 1-4 manufactures.
9. the composite construction ferrocart core that the manufacture method described in a kind of any one by claim 5-7 manufactures.
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| CN201510454095.9A CN105023743B (en) | 2015-07-29 | 2015-07-29 | Manufacturing method of composite-structure iron powder core green body and manufacturing method of composite-structure iron powder core |
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| JP4888530B2 (en) * | 2009-07-06 | 2012-02-29 | Ｔｄｋ株式会社 | Electronic components |
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