CN108682735A - A kind of high density Giant Magnetostrictive Composites molding machine and method - Google Patents

A kind of high density Giant Magnetostrictive Composites molding machine and method Download PDF

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CN108682735A
CN108682735A CN201810499461.6A CN201810499461A CN108682735A CN 108682735 A CN108682735 A CN 108682735A CN 201810499461 A CN201810499461 A CN 201810499461A CN 108682735 A CN108682735 A CN 108682735A
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high density
giant magnetostrictive
baffle
magnetic field
composites
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CN108682735B (en
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张天丽
李伯辰
蒋成保
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Beihang University
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Beihang University
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N35/00—Magnetostrictive devices
    • H10N35/01—Manufacture or treatment
    • 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
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • 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
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/857—Macromolecular compositions
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Abstract

The invention discloses a kind of high density Giant Magnetostrictive Composites molding machine and method, which is made of pedestal, rotation groove body, baffle group, copper mesh and extrusion head.Wherein, pedestal provides vertical direction support for molding machine and fixes, and can guarantee that rotation groove body horizontally rotates around vertical direction central shaft.Baffle group is made of primary baffle and combined type secondary baffle two parts.Copper mesh deforms during primary baffle prevents extrusion forming；Combined type secondary baffle include movable flashboard and fixed frid two parts, it can be achieved that secondary baffle it is opening/closing.The main body of groove body, hydrostatic head and brass screen as former is rotated, the dynamic magnetic field that Giant Magnetostrictive Composites may be implemented is orientated and high density extrusion forming.The present invention can be directed to giant magnetostrictive material and carry out dynamic orientation and extrusion forming, have device structure simple, the high advantage of shaping efficiency.

Description

A kind of high density Giant Magnetostrictive Composites molding machine and method
Technical field
The present invention relates to a kind of magnetic material molding machine and methods, and in particular to a kind of magnetostriction alloy granule content The molding machine and method of Giant Magnetostrictive Composites more than 55%.
Background technology
Magnetostriction materials refer to a kind of ferrimagnet that geometric dimension changes with magnetized state variation.At present Widely applied magnetostriction materials include mainly using Terfenol-D as the rare earth ultra-magnetostriction material of representative and with Fe-Ga Alloy is the iron-based magnetostrictive alloy two major classes of representative.Wherein, rare earth ultra-magnetostriction material has large magneto-strain, Gao Xiang Answer rate and large driving force, therefore be widely used in accurate control, low-frequency transducer, energy acquisition recycling and sensor etc. High-tech sector.Rare earth ultra-magnetostriction material magneto-strain with orientation is up to 2 × 103Ppm, can be in the magnetic fields 1T to assign It is saturated to strain.
While with numerous advantages, the high brittleness of traditional rare earth giant magnetostrictive material, be orientated it is difficult, of high cost etc. Problem limits its large-scale application.In addition to this, as a kind of metal_based material, resistivity is relatively low, in high frequency magnetic Eddy-current loss is serious under field action.In view of the above problems, using rare earth ultra-magnetostriction material crushed particles and high molecular material Giant Magnetostrictive Composites are mixed with, material mechanical performance and resistivity can be effectively improved, expand rareearth super magnetostrictive The application field of material.Composite material overall orientation degree can be improved by magnetic field orientating in Rare Earth Magnetostrictive Composites, And then its magneto-strain is improved, opposite traditional rare earth giant magnetostrictive material has greater advantage.
One kind is disclosed in patent publication No. CN101476079A, and Fe-Ga conjunctions are obtained with gas atomization or airflow milling powder method Gold powder material prepares work using epoxy resin, phenolic resin, phenolic resin as the magnetostriction composite material of non-metallic binder Skill.The preparation process is molded using magnetic field die mould method, and alignment magnetic field size is 1-8T, briquetting pressure 100-1000MPa.Institute Magnetostriction composite material magneto-strain is made and reaches 130ppm, resistivity is up to 48.8 Ω m, and property indices are compared with as cast condition material It is promoted notable.
A kind of height with layer structure is disclosed in patent publication No. CN 102569638A<111>It is orientated super mangneto Flexible composite material and its preparation process.The invention is to be designed to be divided into TbxDy1-xFey(0.4<X≤1,1.9≤y≤1.95) Rareearth super magnetostrictive alloy is raw material, and it is that 10-300 μm of alloy breaks down particle is mixed with bonding agent, curing agent to select granularity, It is obtained through dynamic magnetic field induced orientation.The Giant Magnetostrictive Composites magneto-strain reaches 1900ppm.The material has good simultaneously Good high frequency characteristics, 1 × 105Eddy-current loss is only 510-570w/m under Hz frequencies3。
Magnetostriction composite material process planning widely used at present generally has low (the ultra-magnetic telescopic conjunction of compact density Gold particle bulk density only 30% or so), magneto-strain it is small (<1400ppm) and material is whole<111>The shortcomings of degree of orientation is poor. The present invention is in view of the above problems, have developed with high-magnetostriction alloying pellet volume density, high magneto-strain, high-orientation Giant Magnetostrictive Composites molding machine and method.
Invention content
The technology of the present invention solves the problems, such as：Overcome the deficiencies of the prior art and provide a kind of high density ultra-magnetic telescopic composite wood Expect molding machine and method, the Giant Magnetostrictive Composites prepared using this molding machine and technique have high ultra-magnetic telescopic Alloying pellet volume density (>55%), large magneto-strain (>1500ppm), high<111>The degree of orientation and moulding process are simple Feature.
The technology of the present invention solution：A kind of high density Giant Magnetostrictive Composites molding machine, with the tree of low-density Fat-rareearth super magnetostrictive alloying pellet mixture is raw material, prepares the high density ultra-magnetic telescopic with height-oriented degree Composite material.Its structure includes pedestal, rotation groove body, baffle group, brass screen and extrusion head；Groove body is rotated to squeeze with extrusion head composition Press forming device main body, i.e. molding cavity, molding cavity both sides are followed successively by brass screen and baffle group from the inside to the outside, by bolt with Rotation groove body is connected and fixed.
The pedestal includes the bearing of horizontal direction placement, ensures the rotation of rotation groove body horizontal direction.
The baffle group includes primary baffle and combined secondary baffle, is fixed by bolts on the outside of forming cavity, by suitable Sequence to outside on the inside of former by being followed successively by primary baffle and combined secondary baffle；It is described primary baffle include and level side To in ± 45 ° of ribs, prevent copper mesh during extrusion forming from deforming；The combined secondary baffle includes：Group activity Plate and fixed frid, active plugboard are fixed in the slot of fixed frid；When active plugboard is fixed on fixing groove intralamellar part, Combined secondary baffle is in closed state；After being taken out in active plugboard self-retaining frid, combined secondary baffle, which is in, to be opened Open state.
The brass screen distance is 100 μm.
It is giantmagnetostrictive alloy that raw material used by high density Rare Earth Magnetostrictive Composites is prepared in the present invention The homogeneous mixture of particle, polymeric adhesion material and curing agent, and giantmagnetostrictive alloy granule content is not more than 30%. Be conducive to reduce intergranular friction and steric restriction effect during magnetic field orientating using low-alloy grain density, be conducive to obtain Highly<111>The giantmagnetostrictive alloy orientation of particles of orientation.Rareearth super magnetostrictive alloying pellet is divided by being designed to TbxDy1-xFey(0.23≤x<1,1.92<y<1.96) master alloy ingot through Mechanical Crushing be made, granularity be 100-200 μm.It is female It is needed through 950 DEG C of homogenizing annealing 8h before alloy pig is broken, and shattering process needs inert atmosphere protection.Polymeric adhesive is epoxy One or more of resin, phenolic resin, phenolic resin are obtained by mixing.Used curing agent is for the most frequently used of bonding agent Curing agent.
Further, raw material after sufficiently mixing need to be 1 × 10-3Degassing process 30min under Pa vacuum degrees, to remove mixing Enter the bubble in mixture in the process, in order to avoid the cavity blemish for seriously affecting Magnetostriction is formed after hardening.
It further, need to be in parallel forming cavity after by bonding agent-alloying pellet-curing agent mixture merging forming cavity On cavity long axis ray direction apply horizontal magnetic field go forward side by side Mobile state induced by magnetic field orientation.Horizontal magnetic field size is 8000- 10000Oe, dynamic magnetic field induced orientation frequency are 1Hz, and the duration is not less than 1min.
High density Giant Magnetostrictive Composites moulding process includes the following steps：
Giantmagnetostrictive alloy particle, bonding agent, curing agent are mixed to get shaping raw material by the first step in proportion；
Second step, to raw material 1 × 10-3Degassing process under Pa vacuum degrees；
Third walks, and injects raw material in aforementioned molding machine；
4th step, described device is placed in electromagnet, and is applied horizontal direction magnetic field and taken with carrying out induced by magnetic field to it To；
5th step, pressing extrusion head are molded material extruding, and it is compound to obtain the high density ultra-magnetic telescopic after magnetic field orientating The uncured presoma of material；
6th step stands in magnetic field to primary solidification high density Giant Magnetostrictive Composites presoma, Yu Ci It takes out and is placed under room temperature environment until being fully cured to obtain high density Giant Magnetostrictive Composites finished product in.
In the first step, the raw material is the equal of rareearth super magnetostrictive alloying pellet, polymeric adhesion material and curing agent Even mixture；The rareearth super magnetostrictive alloying pellet is divided into Tb by being designed toxDy1-xFey, 0.23≤x<1,1.92<y< 1.96 master alloy ingot is made through Mechanical Crushing；The rareearth super magnetostrictive alloying pellet shared volume in raw mixture Score is not more than 30%；The polymeric adhesion material is that one or more of epoxy resin, phenolic resin, phenolic resin are mixed It closes and obtains.
The particle size range of the rareearth super magnetostrictive alloying pellet is 100-200 μm；It is needed before the master alloy ingot is broken Through 950 DEG C of homogenizing annealing 4-8h, and shattering process needs inert atmosphere protection.
In second step, 1 × 10-3Degassing process 10-30min under Pa vacuum degrees.
In third step, horizontal magnetic field size is 8000-10000Oe, and dynamic magnetic field induced orientation frequency is 1-10Hz, is continued Time is not less than 1min.
In 5th step, the uncured high density Giant Magnetostrictive Composites presoma need to be stood in magnetic field until viscous Connect agent primary solidification.
In 5th step, the solidification temperature is room temperature, is stood until bonding agent is fully cured.
Further, it after completing dynamic magnetic field induced orientation, removes flapper and presses extrusion head, remove extra viscous Tie agent and curing agent.
Further, after the completion of extrusion process, device stands after bonding agent primary solidification and is taken out in magnetic field, sets It is fully cured at room temperature to composite material.
Further, high density Rare Earth Magnetostrictive Composites and cleaning equipment after curing are taken out.
The advantages of the present invention over the prior art are that：
(1) Giant Magnetostrictive Composites forming process is divided into low-density magnetic field forming process and extrusion forming two Process obtains height<111>It is orientated, the Giant Magnetostrictive Composites of high magneto-strain, has moulding process simple, molding Process is simple, the fast advantage of shaping speed.
(2) present invention passes through dynamic under low-density by combining dynamic magnetic field induced orientation technique and magnetic-field extrusion technique Induced by magnetic field, which is orientated, obtains height magnetic field orientating, and then obtains high density ultra-magnetic telescopic composite wood by magnetic-field extrusion technique Material, has the characteristics that simple process, wherein dynamic magnetic field induced orientation effectively reduces giantmagnetostrictive alloy under low-density Resistance in grain orientation process and steric restriction effect, help to improve material overall orientation degree.By adjusting flapper It unlatches and closes, can control opening and the closing of forming cavity, complete induced by magnetic field orientation and extrusion forming process.
(3) there is the Giant Magnetostrictive Composites prepared by the present invention significant orientation, magneto-strain to reach 1600ppm More than, dynamic magnetostriction coefficient is up to 0.7ppm/Oe.Composite material middle rare earth giantmagnetostrictive alloy volume fraction is not low In 55%.
Description of the drawings
Fig. 1 is high density Giant Magnetostrictive Composites former structure chart；
Fig. 2 is high density Giant Magnetostrictive Composites moulding process flow process figure；
Fig. 3 is high density Giant Magnetostrictive Composites metallograph；
Fig. 4 is high density Giant Magnetostrictive Composites static state Magnetostrictive curve；
Fig. 5 is high density Giant Magnetostrictive Composites dynamic Magnetostrictive curve.
Specific implementation mode
In order to keep present device structure and moulding process clearer, below with reference to present device structure chart and tool Body formed technological process takes example to carry out clear, complete description to the present invention.The example is the content of present invention and embodiment party A part for case, those skilled in the art in the case where creative work is not carried out used any case study on implementation in the present invention In protection domain.
Embodiment 1：
It is Tb to prepare alloying pellet ingredient0.5Dy0.5Fe1.95, grain volume fraction>55% rareearth super magnetostrictive is multiple Condensation material.
1. raw material preparation
Select high-purity terbium (Tb>99.9%), high-purity dysprosium (Dy>And high purity iron (Fe 99.9%)>99.5%), based on chemistry Measure ratio 0.5：0.5：1.95, in master alloy melting ingot in electric arc furnaces.For the scaling loss in compensation fusion process, terbium and dysprosium need to enter stove Increase 0.5%wt on quality base.In fusion process, not volatile iron need to be placed in raw material top, can be incited somebody to action after iron thawing Terbium and dysprosium cladding protection are to reduce its volatilization.Master alloy obtained by arc melting is after quartz ampoule encapsulation process, at 950 DEG C Anneal 8h, is taken out after cooling to room temperature with the furnace, the Mechanical Crushing in filling Ar glove boxes.Using sample sifter to broken alloy Grain powder is sieved, and it is that raw material prepares super mangneto to choose granularity giantmagnetostrictive alloy particle in part between 100-200 μm Flexible composite material.
Using E44 types epoxy resin and curing agent triethylene tetramine in mass ratio 85:15 mixing, slowly set after mixing Enter rareearth super magnetostrictive alloying pellet, and be further stirred, until resin complete wetting alloying pellet.Wherein, alloy Shared volume fraction is 20% to particle in the mixture.Mixed raw material is placed in vacuum outgas 30min in vacuum tank, waits mixing Resin clarification is closed in object without being taken out after apparent bubble.
2. forming process
High density Giant Magnetostrictive Composites forming process is as shown in Figure 2.After former is assembled, raw material is mixed Object is placed in forming cavity.Combined type secondary baffle is closed at this time, and forming cavity is in closed state.Slowly the discharge of pressure extrusion head is more Residual air body (2 charging procedure of corresponding diagram).
Former is placed in 0.8T horizontal magnetic fields, magnetic direction is kept to be parallel to forming cavity horizontal long axis direction.With 1Hz frequencies carry out dynamic magnetic field orientation to rotary body in former.In orientation process, rotary body amplitude of fluctuation is ± 45 °, is held The continuous time is 1min (2 dynamic magnetic field induced orientation step of corresponding diagram).
After dynamic magnetic field induced orientation, rotation long axis of body is slowly gone into parallel magnetic field direction, removes both sides activity Active plugboard in baffle group.It keeps swivelling chute motionless, slowly depresses extrusion head, Excess resin is extruded discharge, super mangneto at this time Flexible alloying pellet cannot be discharged by copper mesh inhibition.It is compound that high density ultra-magnetic telescopic is tentatively obtained in forming cavity at this time Material precursor (2 extrusion forming step of corresponding diagram).
After extrusion process, magnetic field 2h is kept to ensure resin primary solidification.It will then be taken out in orientation apparatus self-magnetic field, It is placed in and cures at room temperature for 24 hours.After resin is fully cured, high density Rare Earth Magnetostrictive Composites after molding are taken out.
The Giant Magnetostrictive Composites prepared using the present invention, static Magnetostrictive curve are as shown in Figure 4.It is maximum Magneto-strain is up to 1600ppm or more；Dynamic Magnetostrictive curve is as shown in figure 5, maximum dynamic magnetostriction coefficient is 0.7ppm/Oe.Alloying pellet volume fraction is 57.3% in Giant Magnetostrictive Composites.
Embodiment 2：
It is Tb to prepare alloying pellet ingredient0.7Dy0.3Fe1.95, grain volume fraction>55% rareearth super magnetostrictive is multiple Condensation material.
1. raw material preparation
Select high-purity terbium (Tb>99.9%), high-purity dysprosium (Dy>And high purity iron (Fe 99.9%)>99.5%), based on chemistry Measure ratio 0.7：0.3：1.95, in master alloy melting ingot in electric arc furnaces.Its melting and Particle Breakage process are identical as example 1.
Using NPEF-170 types epoxy resin and curing agent triethylene tetramine in mass ratio 83:17 mixing, mixed process with Example 1 is identical.Since NPEF-170 type resin viscosities are relatively low, it is easy to bubble floating exclusion, to avoid particle from settling, vacuum outgas Process is 10min.
2. forming process
Equipment assembles and forming process is identical as example 1, and it is 10Hz that dynamic magnetic field, which is orientated frequency,.Due to NPEF-170 type rings Oxygen resin curing time is shorter, after extrusion process, magnetic field 1h is kept to ensure resin primary solidification.Then by orientation apparatus It is taken out in self-magnetic field, is placed in and cures under room temperature for 24 hours.After resin is fully cured, it is super to take out high density rare earth after molding Magnetostriction composite material.
Since NPEF-170 type ring oxygen resin viscosities are far below the E44 type epoxy resin employed in example 1, magnetic field orientating Giantmagnetostrictive alloy may be easy to settle in the process, to influence high density extrusion forming effect.Therefore super magnetic in this example It causes alloying pellet volume fraction in flexible composite material to decrease compared with example 1, is 55.6%.But due to selected alloying component magnetic Anisotropic crystalline is larger, therefore material is whole<111>Crystal orientation degree of orientation is higher, and magneto-strain is moved up to 1700ppm or more State magnetostriction coefficient can also reach 0.6ppm/Oe.
Embodiment 3：
It is Tb to prepare alloying pellet ingredient0.27Dy0.73Fe1.95, grain volume fraction>55% rareearth super magnetostrictive Composite material.
1. raw material preparation
Select high-purity terbium (Tb>99.9%), high-purity dysprosium (Dy>And high purity iron (Fe 99.9%)>99.5%), based on chemistry Measure ratio 0.27：0.73：1.95, in master alloy melting ingot in electric arc furnaces.Its melting and Particle Breakage process are identical as example 1.
Using E51 types epoxy resin and curing agent triethylene tetramine in mass ratio 79:21 mixing, mixing and vacuum outgas Journey is identical as example 2.Since E51 type ring oxygen resin viscosities are relatively low, 30% giantmagnetostrictive alloy particle is used in mixed process Volume fraction.
2. forming process
Equipment assembles and forming process is identical as example 1.Since E51 type epoxy cure times are longer, squeezing After journey, magnetic field 4h is kept to ensure resin primary solidification.It will then take out, be placed under room temperature in orientation apparatus self-magnetic field Cure 48h.After resin is fully cured, high density Rare Earth Magnetostrictive Composites after molding are taken out.
E51 type ring oxygen resin viscosities are between E44 types and NPEF-170 type epoxy resin, it is ensured that extrusion forming process Middle giantmagnetostrictive alloy particle does not occur seriously to settle, and material alloys grain volume fraction is about 56%.However, due to alloy Tb/Dy ratios are relatively low in ingredient, and close to magnetocrystalline anisotropy compensation point, therefore material is whole<111>It is orientated relatively low.Magneto-strain Only 1100ppm.The ingredient giantmagnetostrictive alloy particle for selecting magnetocrystalline anisotropy too low should be avoided in practical application as possible.
In short, can be seen that the Giant Magnetostrictive Composites prepared by the present invention by above each embodiment, surpass Magnetostriction alloy volume fraction is all higher than 55%, and highest is close to 60%.Prepared Giant Magnetostrictive Composites mangneto Strain>1000ppm, maximum magneto-strain is up to 1700ppm.
Above example is provided just for the sake of the description purpose of the present invention, and is not intended to limit the scope of the present invention.This The range of invention is defined by the following claims.It does not depart from spirit and principles of the present invention and the various equivalent replacements made and repaiies Change, should all cover within the scope of the present invention.

Claims (11)

1. a kind of high density Giant Magnetostrictive Composites molding machine, it is characterised in that：Including pedestal, rotation groove body, baffle Group, brass screen and extrusion head；It rotates groove body and forms extrusion formation equipment main body, i.e. molding cavity, molding cavity two with extrusion head Side is followed successively by brass screen and baffle group from the inside to the outside, is connected and fixed by bolt and rotation groove body.
2. high density Giant Magnetostrictive Composites molding machine according to claim 1, it is characterised in that：The pedestal The bearing for including horizontal direction placement, ensures the rotation of rotation groove body horizontal direction.
3. high density Giant Magnetostrictive Composites molding machine according to claim 1, it is characterised in that：The baffle Group includes primary baffle and combined secondary baffle, is fixed by bolts on the outside of forming cavity, in order by the inside of former It is followed successively by primary baffle and combined secondary baffle to outside；It is in ± 45 ° of ribs that the primary baffle, which includes with horizontal direction, is prevented Only copper mesh deforms during extrusion forming；The combined secondary baffle includes：Group active plugboard and fixed frid, it is living Dynamic plate is fixed in the slot of fixed frid；When active plugboard is fixed on fixing groove intralamellar part, at combined secondary baffle In closed state；After being taken out in active plugboard self-retaining frid, combined secondary baffle is in open state.
4. high density Giant Magnetostrictive Composites molding machine according to claim 1, it is characterised in that：The brass Screen distance is 100 μm.
5. a kind of high density Giant Magnetostrictive Composites forming method, it is characterised in that：Include the following steps：
Giantmagnetostrictive alloy particle, bonding agent, curing agent are mixed to get shaping raw material by the first step in proportion；
Second step, to raw material 1 × 10-3Degassing process under Pa vacuum degrees；
Third walks, and injects raw material in one of the arbitrary described devices of claim 1-4；
4th step, described device is placed in electromagnet, and applies horizontal direction magnetic field to carry out induced by magnetic field orientation to it；
5th step, pressing extrusion head are molded material extruding, obtain the high density Giant Magnetostrictive Composites after magnetic field orientating Uncured presoma；
6th step stands in magnetic field to primary solidification high density Giant Magnetostrictive Composites presoma, in magnetic field Taking-up is placed under room temperature environment until being fully cured to obtain high density Giant Magnetostrictive Composites finished product.
6. a kind of high density Giant Magnetostrictive Composites forming method according to claim 5, it is characterised in that：First In step, the raw material is the homogeneous mixture of rareearth super magnetostrictive alloying pellet, polymeric adhesion material and curing agent；It is described Rareearth super magnetostrictive alloying pellet is divided into Tb by being designed toxDy1-xFey, 0.23≤x<1,1.92<y<1.96 master alloy ingot warp Mechanical Crushing is made；The rareearth super magnetostrictive alloying pellet shared volume fraction in raw mixture is not more than 30%； The polymeric adhesion material is that one or more of epoxy resin, phenolic resin, phenolic resin are obtained by mixing.
7. a kind of high density Giant Magnetostrictive Composites forming method according to claim 5, it is characterised in that：It is described The particle size range of rareearth super magnetostrictive alloying pellet is 100-200 μm；It needs to homogenize through 950 DEG C before the master alloy ingot is broken Anneal 4-8h, and shattering process needs inert atmosphere protection.
8. a kind of high density Giant Magnetostrictive Composites forming method according to claim 5, it is characterised in that：Second In step, 1 × 10-3Degassing process 10-30min under Pa vacuum degrees.
9. a kind of high density Giant Magnetostrictive Composites forming method according to claim 5, it is characterised in that：Third In step, horizontal magnetic field size is 8000-10000Oe, and dynamic magnetic field induced orientation frequency is 1-10Hz, and the duration is not less than 1min。
10. a kind of high density Giant Magnetostrictive Composites forming method according to claim 5, it is characterised in that：The In five steps, the uncured high density Giant Magnetostrictive Composites presoma need to be stood in magnetic field until bonding agent is tentatively solid Change.
11. a kind of high density Giant Magnetostrictive Composites forming method according to claim 5, it is characterised in that：The In five steps, the solidification temperature is room temperature, is stood until bonding agent is fully cured.
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