CN106024256A - Soft magnetic iron core for automobile ignition coil - Google Patents

Soft magnetic iron core for automobile ignition coil Download PDF

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Publication number
CN106024256A
CN106024256A CN201610493428.3A CN201610493428A CN106024256A CN 106024256 A CN106024256 A CN 106024256A CN 201610493428 A CN201610493428 A CN 201610493428A CN 106024256 A CN106024256 A CN 106024256A
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soft magnet
magnet core
iron core
ignition coil
soft magnetic
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CN201610493428.3A
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CN106024256B (en
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陈凌
王琰
任琪
程晓
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KPS Wuxi Machinery Technology Co Ltd
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KPS Wuxi Machinery Technology Co Ltd
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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
    • H01F1/14708—Fe-Ni based alloys
    • H01F1/14733—Fe-Ni based alloys in the form of particles
    • H01F1/14741—Fe-Ni based alloys in the form of particles pressed, sintered or bonded together
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • 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
    • H01F41/02—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 for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Dispersion Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

The invention discloses a soft magnetic iron core for an automobile ignition coil. The soft magnetic iron core is cylindrical and is prepared from, by weight, 2% of Ni, 0.2% of Ti, 0.1% of Co, 0.15% of P, 0.1% of Sn, 0.1% of V, 1% of phenolic resin and the balance iron, wherein the content of C is smaller than or equal to 0.02%, and the content of O is smaller than or equal to 0.15%. A preparing technology of the soft magnetic iron core includes the steps of vacuum melting, primary smashing, medium smashing, fine smashing, liquid removing, drying, screening, annealing, insulation wrapping, pressing forming, heat treatment and the like. After the components and the preparing technology are adopted, the soft magnetic iron core is integrally and vertically formed and pressed, forming pressure is low, higher forming density, higher resistivity, higher original magnetic conductivity, higher saturation flux density and higher spectral characteristics are achieved, and losses are low. In addition, the surface smoothness of the soft magnetic iron core is good, the cross section is circular, the iron core in the certain size has a larger inductance value, and higher ignition energy is provided for the coil.

Description

A kind of automobile ignition coil soft magnet core
Technical field
The present invention relates to automotive engine ignition system, particularly a kind of automobile ignition coil soft magnet core.
Background technology
In automotive engine ignition system, ignition coil is to carry for air and fuel oil mixture in ignition engine cylinder Execution unit for ignition energy.Its principle based on electromagnetic induction, by being turned off and on the primary return of ignition coil, just Electric current increase in level loop reduces the most suddenly, so will sense generation in secondary and light required high voltage.Igniting Coil may be considered a kind of special pulse transformer, and the low voltage transition of 10-12V is become 25000V or higher electricity by it Pressure.At present, more typical for open-flux path pen-type ignition coil, it includes constituting the open iron core of ignition coil magnetic circuit, being wound on Secondary copper cash winding on iron core and be around in the primary coil winding outside secondary windings.Mainly by primary coil winding Electric current stores as magnetic field.When primary coil windings electric current is abruptly cut (by power transistor disconnecting circuit earth terminal) Time, field decay, make secondary coil winding produce induction electromotive force, the voltage of this induction electromotive force be enough to make pen type coil put Electricity, we are called the igniting of inductive discharge formula.The most also there is CD ignition system, be commonly called CDI igniting side Formula.
In ignition coil, iron core is core component, and the inductance value of iron core directly influences the ignition energy of coil.
The Chinese invention patent application of Application No. 201310273684.8 disclosed in 1 day January in 2014, its innovation and creation Entitled " a kind of automobile spark plug lighter iron core group ", wherein the first iron core is to be folded by the punching material strip of multilamellar electrical steel strip The segment core become and connect together is folded into close-shaped annular core；Every layer of punching material strip is by 4 segmentations and bonding pad Composition, the first segmentation and the second segmentation, the second segmentation and the 3rd segmentation, between the 3rd segmentation and the 4th segmentation by bonding pad even Connect, and be respectively designed to boss and groove on the first segmentation position relative with the outside of the 4th segmentation so that hinged locking；Electricity The grain orientation of work steel band is consistent with the length direction of four segmentations；Second iron core is mounted above the connection looped mentioned Inside one iron core, it is also to be overrided to form by multilamellar electrical sheet punching material strip, and its length direction and electrical sheet grain orientation Unanimously.Thus there is the advantage saved material and reduce cost.
The Chinese invention patent application of Application No. " 201210485879.4 " disclosed in 27 days February in 2013, its invention Entitled " method of a kind of automobile ignition coil core progressive die automatic press counting lamination riveting molding " created, it is main Fixed reeling-up reeling-out device by punch press squeeze riveter, single-chip microcomputer and electrical control cubicles, material strip, remaining strip winding device forms, and sets in electrical control cubicles Have single-chip microcomputer, progressive die is provided with proximity transducer switch, electromagnetic valve utilize proximity transducer switch carry out memory counting, if Provisioning request numerical value, is arranged output signal by single-chip microcomputer numerical value, controls electromagnetic valve, and electromagnetic valve output controls cylinder and realizes lamination meter Number, also arranges a mistake proofing in progressive die and corrects sensor, i.e. mistake proofing correction button, control punch press and progressive die stops work Make, after equipment being adjusted correctly, restart continuous punching work.The present invention improves production efficiency 10 times, only needs 1 people behaviour Making, conforming product rate brings up to 99.7% from original 85% 90%, reduces production cost.
In above-mentioned two pieces patent application, after automobile ignition coil core all uses stalloy to stack, the method for riveting molding It is prepared.Stalloy is when lamination and riveting molding, and lamination easily misplaces, and has riveting gap and riveting damage between sheet and sheet Deng, therefore causing the resistivity of automobile ignition coil core lowly, initial magnetic permeability and magnetic induction are low, loss height, high frequency sound Should be poor, the inductance value of iron core is less, thus causes the ignition energy of coil little.
It addition, at present, the processing technology of soft magnet core is all that employing level fixes pressing, and detailed process is: by die Being fixed on mould bases, load onto iron powder in die, use upper punch to suppress together with undershoot, wherein, undershoot is a semi-cylindrical, Gu Fixed the most motionless, die also maintains static, and upper punch is also a semi-cylindrical, has moved up and down pressing process by upper punch.Because Whole iron core is put together by two semi-cylindrical, is constantly present certain interface between two semicircular, it is impossible to form one completely Circle, the inductance value making iron core is less, thus causes the ignition energy of coil little.Meanwhile, iron core ground cross section is similar ellipse Shape, and there are wider seam, poor surface smoothness in centre.Iron core uses straight iron powder to make, and has relatively low resistivity, low Saturation induction density, bigger loss, and high frequency response is poor.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and provides a kind of automobile ignition coil With soft magnet core, this automobile ignition coil soft magnet core is integrated vertical molding compacting, and briquetting pressure is low, has higher one-tenth Type density, resistivity, initial permeability, saturation induction density and spectral characteristic, and it is lost low.It addition, the table of soft magnet core Face fineness is good, and cross section is circular, makes the iron core of certain size have bigger inductance value, provides higher point for coil Fire energy.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of automobile ignition coil soft magnet core, soft magnet core be shaped as cylinder；The component of soft magnet core and content, press Percentage by weight meter, including: Ni 2-4%；Ti 0.2-0.3%；Co 0.1-0.3%；P 0.15-0.4%；Sn 0.1-0.3%；V 0.1-0.3%；Phenolic resin 1-2%；Surplus is ferrum.
Soft magnet core is prepared according to following technique:
The first step, vacuum melting: by iron block and nickel block according to proportioning, put in vaccum sensitive stove and carry out melting casting.
Second step, just pulverizes: alloy first step melting cast, and uses pulverizer tentatively to pulverize.
3rd step, middle pulverizing: under nitrogen protective atmosphere encloses, first the alloy pulverized at the beginning of second step is put into selecting crude drugs with winnower sand mill In, according still further to proportioning, it is sequentially added into Ti, Co, P, Sn and V, opens selecting crude drugs with winnower sand mill, carry out middle pulverizing.
4th step, finely divided: under protected alcohol atmosphere, use sand mill again to carry out the alloy pulverized in the 3rd step Finely divided.
5th step, de-liquid, drying: use the alloyed powder that centrifuge is finely divided to the 4th step, carry out de-liquid；Recycling baking oven Alloyed powder after de-liquid is dried.
6th step, screening: the 5th step is taken off the alloyed powder use vibrosieve that liquid dried and sieves.
7th step, annealing: under hydrogen nitrogen mixed gas atmosphere, the alloyed powder the 6th step sieved use pushes away boat stove and enters Row annealing.
8th step, insulating wrapped: the alloyed powder processed by the 7th step annealing adds in insulating wrapped agitator, then presses Adding phenolic resin and lubricant according to proportioning, insulating wrapped agitator carries out heated and stirred and cladding.
9th step, compressing: to use moulding press, use the mode of vertical vertical compacting, make the soft magnet of cylinder The one-body molded compacting of core.
Tenth step, heat treatment: soft magnet core compressing for the 9th step is carried out heat treatment.
In described 7th step, the temperature of annealing is 800-1200 °, is incubated 2-4 hour.
In described tenth step, the temperature of heat treatment is 120-200 °, is incubated 4-6 hour.
The heating-up temperature of described insulating wrapped agitator is 55-65 °, and insulating wrapped agitator includes interior bucket, outer barrel and bag Overlay on the heater of outer barrel surrounding, interior bucket can rotation, can revolve round the sun along with outer barrel again.
Briquetting pressure during the one-body molded compacting of cylindrical soft magnet core is 6-12T/cm2, forming temperature is 60- 200°。
After the present invention uses said components and preparation technology, soft magnet core is integrated vertical molding compacting, and briquetting pressure is low, There is higher compact density, resistivity, initial permeability, saturation induction density and spectral characteristic, and be lost low.It addition, The surface smoothness of soft magnet core is good, and cross section is circular, makes the iron core of certain size have bigger inductance value, for coil Higher ignition energy is provided.
Detailed description of the invention
With regard to concrete better embodiment, the present invention is further detailed explanation below.
Embodiment 1
A kind of automobile ignition coil soft magnet core, soft magnet core be shaped as cylinder；The component of soft magnet core and content, press Percentage by weight meter, including: Ni 2%；Ti 0.2%；Co 0.1%；P 0.15%；Sn 0.1%；V 0.1%；Phenolic resin 1%；Remaining Amount is ferrum.Wherein, C≤0.02%, O≤0.15%.
Soft magnet core is prepared according to following technique:
The first step, vacuum melting: by iron block and nickel block according to proportioning, put in vaccum sensitive stove and carry out melting casting.
Second step, just pulverizes: alloy first step melting cast, and uses pulverizer tentatively to pulverize.
3rd step, middle pulverizing: under nitrogen protective atmosphere encloses, first the alloy pulverized at the beginning of second step is put into selecting crude drugs with winnower sand mill In, according still further to proportioning, it is sequentially added into Ti, Co, P, Sn and V, opens selecting crude drugs with winnower sand mill, carry out middle pulverizing.
4th step, finely divided: under protected alcohol atmosphere, use sand mill again to carry out the alloy pulverized in the 3rd step Finely divided.
5th step, de-liquid, drying: use the alloyed powder that centrifuge is finely divided to the 4th step, carry out de-liquid；Recycling baking oven Alloyed powder after de-liquid is dried.
6th step, screening: the 5th step is taken off the alloyed powder use vibrosieve that liquid dried and sieves.
7th step, annealing: under hydrogen nitrogen mixed gas atmosphere, the alloyed powder the 6th step sieved use pushes away boat stove and enters Row annealing.The temperature of annealing is 800 °, is incubated 2-4 hour.
8th step, insulating wrapped: the alloyed powder processed by the 7th step annealing adds in insulating wrapped agitator, then presses Adding phenolic resin and lubricant according to proportioning, insulating wrapped agitator carries out heated and stirred and cladding.Insulating wrapped agitator Heating-up temperature is 55-65 °, preferably 60 °, and insulating wrapped agitator includes interior bucket, outer barrel and is coated on the heating of outer barrel surrounding Device, interior bucket can rotation, can revolve round the sun along with outer barrel again such that it is able to preventing alloyed powder from gluing wall, heating-up temperature is the most equal Even.After being covered to complete, when less than 40 °, the alloyed powder in insulating wrapped bucket can be taken out.Alloyed powder after insulating wrapped Grain distribution need to meet: 100-200 mesh 10-20%, 200-300 mesh 40-50%, surplus is the 300 following granules of mesh.
9th step, compressing: to use moulding press, use the mode of vertical vertical compacting, make the soft magnet of cylinder The one-body molded compacting of core.Briquetting pressure during the one-body molded compacting of cylindrical soft magnet core is 6-12T/cm2, forming temperature is 60-200°。
Tenth step, heat treatment: soft magnet core compressing for the 9th step is carried out heat treatment.The temperature of heat treatment is 120- 200 °, it is incubated 4-6 hour.
Embodiment 2
A kind of automobile ignition coil soft magnet core, soft magnet core be shaped as cylinder；The component of soft magnet core and content, press Percentage by weight meter, including: Ni 3%；Ti 0.25%；Co 0.2%；P 0.3%；Sn 0.2%；V 0.2%；Phenolic resin 1.5%； Surplus is ferrum.Wherein, C≤0.02%, O≤0.15%.
Soft magnet core is prepared according to following technique:
The first step, vacuum melting: by iron block and nickel block according to proportioning, put in vaccum sensitive stove and carry out melting casting.
Second step, just pulverizes: alloy first step melting cast, and uses pulverizer tentatively to pulverize.
3rd step, middle pulverizing: under nitrogen protective atmosphere encloses, first the alloy pulverized at the beginning of second step is put into selecting crude drugs with winnower sand mill In, according still further to proportioning, it is sequentially added into Ti, Co, P, Sn and V, opens selecting crude drugs with winnower sand mill, carry out middle pulverizing.
4th step, finely divided: under protected alcohol atmosphere, use sand mill again to carry out the alloy pulverized in the 3rd step Finely divided.
5th step, de-liquid, drying: use the alloyed powder that centrifuge is finely divided to the 4th step, carry out de-liquid；Recycling baking oven Alloyed powder after de-liquid is dried.
6th step, screening: the 5th step is taken off the alloyed powder use vibrosieve that liquid dried and sieves.
7th step, annealing: under hydrogen nitrogen mixed gas atmosphere, the alloyed powder the 6th step sieved use pushes away boat stove and enters Row annealing.The temperature of annealing is 1000 °, is incubated 2-4 hour.
8th step, insulating wrapped: the alloyed powder processed by the 7th step annealing adds in insulating wrapped agitator, then presses Adding phenolic resin and lubricant according to proportioning, insulating wrapped agitator carries out heated and stirred and cladding.Insulating wrapped agitator Heating-up temperature is 55-65 °, preferably 60 °, and insulating wrapped agitator includes interior bucket, outer barrel and is coated on the heating of outer barrel surrounding Device, interior bucket can rotation, can revolve round the sun along with outer barrel again such that it is able to preventing alloyed powder from gluing wall, heating-up temperature is the most equal Even.After being covered to complete, when less than 40 °, the alloyed powder in insulating wrapped bucket can be taken out.Alloyed powder after insulating wrapped Grain distribution need to meet: 100-200 mesh 10-20%, 200-300 mesh 40-50%, surplus is the 300 following granules of mesh.
9th step, compressing: to use moulding press, use the mode of vertical vertical compacting, make the soft magnet of cylinder The one-body molded compacting of core.Briquetting pressure during the one-body molded compacting of cylindrical soft magnet core is 6-12T/cm2, forming temperature is 60-200°。
Tenth step, heat treatment: soft magnet core compressing for the 9th step is carried out heat treatment.The temperature of heat treatment is 120- 200 °, it is incubated 4-6 hour.
Embodiment 3
A kind of automobile ignition coil soft magnet core, soft magnet core be shaped as cylinder；The component of soft magnet core and content, press Percentage by weight meter, including: Ni 4%；Ti 0.3%；Co 0.3%；P 0.4%；Sn 0.3%；V 0.3%；Phenolic resin 2%；Remaining Amount is ferrum.Wherein, C≤0.02%, O≤0.15%.
Soft magnet core is prepared according to following technique:
The first step, vacuum melting: by iron block and nickel block according to proportioning, put in vaccum sensitive stove and carry out melting casting.
Second step, just pulverizes: alloy first step melting cast, and uses pulverizer tentatively to pulverize.
3rd step, middle pulverizing: under nitrogen protective atmosphere encloses, first the alloy pulverized at the beginning of second step is put into selecting crude drugs with winnower sand mill In, according still further to proportioning, it is sequentially added into Ti, Co, P, Sn and V, opens selecting crude drugs with winnower sand mill, carry out middle pulverizing.
4th step, finely divided: under protected alcohol atmosphere, use sand mill again to carry out the alloy pulverized in the 3rd step Finely divided.
5th step, de-liquid, drying: use the alloyed powder that centrifuge is finely divided to the 4th step, carry out de-liquid；Recycling baking oven Alloyed powder after de-liquid is dried.
6th step, screening: the 5th step is taken off the alloyed powder use vibrosieve that liquid dried and sieves.
7th step, annealing: under hydrogen nitrogen mixed gas atmosphere, the alloyed powder the 6th step sieved use pushes away boat stove and enters Row annealing.The temperature of annealing is 1200 °, is incubated 2-4 hour.
8th step, insulating wrapped: the alloyed powder processed by the 7th step annealing adds in insulating wrapped agitator, then presses Adding phenolic resin and lubricant according to proportioning, insulating wrapped agitator carries out heated and stirred and cladding.Insulating wrapped agitator Heating-up temperature is 55-65 °, preferably 60 °, and insulating wrapped agitator includes interior bucket, outer barrel and is coated on the heating of outer barrel surrounding Device, interior bucket can rotation, can revolve round the sun along with outer barrel again such that it is able to preventing alloyed powder from gluing wall, heating-up temperature is the most equal Even.After being covered to complete, when less than 40 °, the alloyed powder in insulating wrapped bucket can be taken out.Alloyed powder after insulating wrapped Grain distribution need to meet: 100-200 mesh 10-20%, 200-300 mesh 40-50%, surplus is the 300 following granules of mesh.
9th step, compressing: to use moulding press, use the mode of vertical vertical compacting, make the soft magnet of cylinder The one-body molded compacting of core.Briquetting pressure during the one-body molded compacting of cylindrical soft magnet core is 6-12T/cm2, forming temperature is 60-200°。
Tenth step, heat treatment: soft magnet core compressing for the 9th step is carried out heat treatment.The temperature of heat treatment is 120- 200 °, it is incubated 4-6 hour.
Verification experimental verification
By the automobile ignition coil soft magnet core of the application, as a example by e60, use same LCR numeral secohmmeter, density Tester and power consumption instrument, when 100KHz, carry out the test of initial permeability, compact density, magnetic induction.
Meanwhile, use prior art, such as stalloy in background technology, as reference examples.
Result of the test is as follows:
Initial permeability Compact density g/cm3 Ratio total power consumption Ps(W/kg)
Embodiment 1 6300 7.3 26.5
Embodiment 2 6800 7.5 25.1
Embodiment 3 6500 7.4 26.2
Reference examples 5600 —— 30
By above test, it is seen that the present invention's is with the obvious advantage, it is simple to wide popularization and application.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned embodiment Detail, in the technology concept of the present invention, technical scheme can be carried out multiple equivalents, this A little equivalents belong to protection scope of the present invention.

Claims (5)

1. an automobile ignition coil soft magnet core, soft magnet core be shaped as cylinder；It is characterized in that: soft magnet core Component and content, by weight percentage, including:
Ni 2-4%；
Ti 0.2-0.3%；
Co 0.1-0.3%；
P 0.15-0.4%；
Sn 0.1-0.3%；
V 0.1-0.3%；
Phenolic resin 1-2%；
Surplus is ferrum；
Soft magnet core is prepared according to following technique:
The first step, vacuum melting: by iron block and nickel block according to proportioning, put in vaccum sensitive stove and carry out melting casting；
Second step, just pulverizes: alloy first step melting cast, and uses pulverizer tentatively to pulverize；
3rd step, middle pulverizing: under nitrogen protective atmosphere encloses, first the alloy pulverized at the beginning of second step is put into selecting crude drugs with winnower sand mill, then According to proportioning, it is sequentially added into Ti, Co, P, Sn and V, opens selecting crude drugs with winnower sand mill, carry out middle pulverizing；
4th step, finely divided: under protected alcohol atmosphere, use sand mill again to carry out fine powder the alloy pulverized in the 3rd step Broken；
5th step, de-liquid, drying: use the alloyed powder that centrifuge is finely divided to the 4th step, carry out de-liquid；Recycling baking oven will be de- Alloyed powder after liquid is dried；
6th step, screening: the 5th step is taken off the alloyed powder use vibrosieve that liquid dried and sieves；
7th step, annealing: under hydrogen nitrogen mixed gas atmosphere, the alloyed powder the 6th step sieved use pushes away boat stove and moves back Fire processes；
8th step, insulating wrapped: the alloyed powder processed by the 7th step annealing adds in insulating wrapped agitator, according still further to joining Than adding phenolic resin and lubricant, insulating wrapped agitator carries out heated and stirred and cladding；
9th step, compressing: to use moulding press, use the mode of vertical vertical compacting, make the soft magnet core one of cylinder Body formed compacting；
Tenth step, heat treatment: soft magnet core compressing for the 9th step is carried out heat treatment.
Automobile ignition coil soft magnet core the most according to claim 1, it is characterised in that: in described 7th step, annealing The temperature processed is 800-1200 °, is incubated 2-4 hour.
Automobile ignition coil soft magnet core the most according to claim 1, it is characterised in that: in described tenth step, at heat The temperature of reason is 120-200 °, is incubated 4-6 hour.
Automobile ignition coil soft magnet core the most according to claim 1, it is characterised in that: described insulating wrapped agitator Heating-up temperature be 55-65 °, insulating wrapped agitator includes interior bucket, outer barrel and is coated on the heater of outer barrel surrounding, interior bucket Can rotation, can revolve round the sun along with outer barrel again.
Automobile ignition coil soft magnet core the most according to claim 1, it is characterised in that: cylindrical soft magnet core one Briquetting pressure during body formed compacting is 6-12T/cm2, forming temperature is 60-200 °.
CN201610493428.3A 2016-06-29 2016-06-29 A kind of automobile ignition coil soft magnet core Active CN106024256B (en)

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