CN109746403A - A kind of continuous casing and its device being used to prepare metal-base composites - Google Patents
A kind of continuous casing and its device being used to prepare metal-base composites Download PDFInfo
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Abstract
The present invention relates to the preparation fields of metal-base composites, the continuous casing and its device of a kind of metal-base composites blank are disclosed, method includes the following steps, provides container, container includes inner cavity, and the first opening, the second opening that are connected to respectively with inner cavity；Metal-base composites slurries are made to flood the first opening, and the ullage of metal-base composites slurries has the cavity with the second open communication；It is open by second into cavity and injects inertia pressure gas, metal-base composites slurries are squeezed out from the first opening；The metal-base composites slurries of extrusion are cooled down to obtain metal-base composites blank.The present invention is using pressed gas as the power source for pushing slurries to squeeze out, pressure is uniformly applied on whole slurries by liquid level, dialysis phenomenon can be effectively reduced compared with the prior art, suitable for the continuously casting of composite material, facilitate the production efficiency for promoting composite material.
Description
Technical field
The present invention relates to the preparation fields of metal-base composites, more particularly, to a kind of pair of metal-base composites slurries
Carry out the casting method and casting device of continuously casting.
Background technique
Metal-base composites passes through addition particle, whisker, fiber etc. using metal or alloy such as aluminium, magnesium, iron as matrix
Reinforced phase, to achieve the purpose that designing material structural constituent, improve material property, common reinforced phase is with ceramic phase particles
It is main, such as SiC, Al2O3 etc..The preparation method of metal-base composites has powder metallurgic method, pressure/no pressure method of impregnation, original
Position chemical reactive synthesis method and liquid stirring method etc., relative to be widely used, the powder metallurgical technique of technical maturity and other by
The method of the limited application difficult of material composition property, liquid stirring method because its process flow is short, low in cost, it is versatile and by
Gradually obtain in-depth study and application.But for ingredient tissue uniformity, the reinforced phase particle for guaranteeing each batch of material
Random distribution is not reunited, no matter metal-base composites is prepared using which kind of method, all facing to by blank, container dimensional system
About, the problem of single batch preparation amount is difficult to scale up.It is single a batch of compound even the current high company of commercialization degree
Material blank is also difficult to more than 100kg rank, and the technique that can prepare upper ton with ordinary metallic material, alloy every batch of can not phase
Than.
Continuous casing is a kind of advanced metal casting method, and molten metal liquid is constantly injected crystallization by this method
In device, molten metal cooled and solidified in crystallizer, and pulled out according to the design of the shape of crystallizer casting nozzle from the other end, avoid one
As the nonuniform organizations such as component segregation in casting process the problem of, while the long slab, the long stick that are suitble to following process can be obtained
Blank.This method is high-efficient, consumes energy low, and the rate of output is high, facilitates the subsequent newly net forming of product.It is directed to common metal material at present
Material has mature continuous casting process scheme, can be realized the efficient preparation of high-volume.
However, simply by continuous casing be applied to composite material preparation be it is very difficult, reason it
First is that composite material mixed slurry viscosity is big, dialysis phenomenon easily occurs for when pull-out.Particularly due to during continuously casting, material
Material melt pass through multiple modules --- such as from melting crucible in be transferred in crystallizer, using condensation module, draw systems,
Colimated light system etc. finally obtains blank.But contain a large amount of solid phase particles (volume fraction 1%~40%) in composite material, so that
Slurry viscosity increases, so lead to problems such as slurry by facing during modules resistance is big, stress is irregular, and it is external
Pulling equipment act only on the part solidified, stress is more concentrated, and the above reason causes dialysis phenomenon easily to occur, and
Reinforced phase particle fraction is higher, enhancing phase size is smaller, and the viscosity of slurry is bigger, is more difficult to stablize and realizes continuously casting.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of continuously casting side of metal-base composites blank
Method is prepared with solving the problems, such as that existing continuous casing can not be applied to composite material.
The present invention also provides a kind of continuous casting apparatus of metal-base composites blank.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of continuous casing of metal-base composites blank, includes the following steps,
S10 provides container, and container includes inner cavity, and the first opening, the second opening that are connected to respectively with inner cavity；
S20 makes metal-base composites slurries flood the first opening, and the ullage tool of metal-base composites slurries
There is the cavity with the second open communication；
S30, which is open by second into cavity, injects inertia pressure gas, by metal-base composites slurries from first
It is squeezed out in opening；
S40 cools down to obtain metal-base composites blank the metal-base composites slurries of extrusion.
Mode as a further improvement of the foregoing solution further includes preparing metal-base composites slurry before step S20
The step S11 of liquid, step S11 include: the injection metallic matrix melt in container, and ceramics are then added into metallic matrix melt
Phase particle obtains metal-base composites slurries after agitated.
Mode as a further improvement of the foregoing solution further includes preparing metal-base composites slurry before step S20
The step S11 of liquid, step S11 include: the injection metallic matrix melt in external crucible, are then added into metallic matrix melt
Enter ceramic phase particles, obtains metal-base composites slurries after agitated, then metal-base composites slurries are transferred to container
It is interior.
Mode as a further improvement of the foregoing solution, method metal-base composites slurries being transferred in container
Are as follows:
Crucible is verted, so that the metal-base composites slurries in crucible inject container；
Alternatively, setting runner, the runner are separately connected crucible and container；In the connectivity part of crucible and runner, control unit is set
Part, operating the control unit may make that runner is in an off state or connected state.
Mode as a further improvement of the foregoing solution, in step S11, mixing parametric are as follows: whipping temp 590-750
DEG C, pressure environment is 3000Pa vacuum below or argon atmosphere, and mixing speed 200-700R/min, mixing time is
15-45min。
Mode as a further improvement of the foregoing solution, in step S11, the quality of ceramic phase particles and metallic matrix melt
Than for 1:10 to 2:3.
Mode as a further improvement of the foregoing solution, container include staving and upper cover, and upper cover is separable to be connected to bucket
On body, wherein when upper cover is separated with staving, inner cavity can be connected to by the second opening with external container；Upper cover and staving sealing connect
When connecing, the second opening of upper cover closing.
Mode as a further improvement of the foregoing solution, the sealing surface that staving is connect with upper cover are equipped with seal groove, sealing
Slot is embedded with copper sealing ring, when upper cover and staving sealed connection, is equipped between the sealing surface of staving and the sealing surface of upper cover
Carbon felt is sealed, copper sealing ring is located between the sealing surface of staving and sealing carbon felt.
Mode as a further improvement of the foregoing solution, crucible of the setting at least two in different agitation phases, and according to
It is secondary to inject the metal-base composites slurries being completed in the crucible of stirring in container.
Mode as a further improvement of the foregoing solution further includes in the extrusion process of step S30 to the gold in container
The step of metal-matrix composite material slurries are stirred, the method for stirring are as follows: setting stirring pawl to metal-base composites slurries into
Row mechanical stirring, and/or setting hot-wire coil carry out electromagnetic agitation to metal-base composites slurries.
Mode as a further improvement of the foregoing solution, suffered by the solid-liquid freezing interface forward position of metal-base composites slurries
Invariablenes pressure of liquid is within the set range.
Mode as a further improvement of the foregoing solution, pressure suffered by the forward position of solid-liquid freezing interface are 1.001-1.6 big
Air pressure.
Mode as a further improvement of the foregoing solution maintains the side of invariablenes pressure of liquid suffered by the forward position of the solid-liquid freezing interface
Method are as follows: the gas flow of the inert gas in adjustment injection cavity, so that the t moment after squeezing out since the distance, in cavity
Pressure PtMeet Pt=P0+gρVtS1/S2, wherein P0For pressure suffered by the forward position of solid-liquid freezing interface, ρ is serum density, and V is slurry
The extruded velocity of liquid, S2For the cross-sectional area of slurries, S1For the cross-sectional area of the first opening.
A kind of continuous casting apparatus of metal-base composites blank, including container and gas source, container is interior to have inner cavity, with
And first be connected to respectively with inner cavity is open, the second opening, gas source and reservoir, wherein multiple when accommodating Metal Substrate in inner cavity
Condensation material slurries, and make metal-base composites slurries flood the first opening, and on the liquid level of metal-base composites slurries
When side has the cavity with the second open communication, gas source can inject inertia pressure gas into cavity, so that metal-based compound material
Slurry liquid is squeezed out from the first opening.
The beneficial effects of the present invention are:
For the present invention using pressed gas as the power source for pushing slurries to squeeze out, pressure is uniformly applied to whole by liquid level
On slurries, dialysis phenomenon can be effectively reduced compared with the prior art, suitable for the continuously casting of composite material, help to mention
Rise the production efficiency of composite material.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the schematic diagram of continuous casting system one embodiment of the present invention；
Fig. 2 is the enlarged diagram of staving Yu upper cover connecting portion；
Fig. 3 is the structure broken away view of second embodiment of the invention；
Fig. 4 is the microstructure signal of composite material blank prepared by continuous casing first embodiment of the present invention
Figure；
Fig. 5 is the microstructure signal of composite material blank prepared by continuous casing second embodiment of the present invention
Figure；
Fig. 6 is the microstructure signal of composite material blank prepared by continuous casing fourth embodiment of the present invention
Figure.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to design of the invention, specific structure and generation clear
Chu, complete description, to be completely understood by the purpose of the present invention, scheme and effect.It should be noted that the case where not conflicting
Under, the features in the embodiments and the embodiments of the present application can be combined with each other.
It should be noted that unless otherwise specified, when a certain feature referred to as " fixation ", " connection " are in another feature,
It can directly fix, be connected to another feature, and can also fix, be connected to another feature indirectly.In addition, this
The descriptions such as up, down, left, right, before and after used in invention are only relative to the mutual of each component part of the invention in attached drawing
For positional relationship.
In addition, unless otherwise defined, the technology of all technical and scientific terms used herein and the art
The normally understood meaning of personnel is identical.Term used in the description is intended merely to description specific embodiment herein, without
It is to limit the present invention.Term " and or " used herein includes the arbitrary of one or more relevant listed items
Combination.
Referring to Fig.1, the schematic diagram of continuous casting system one embodiment of the present invention is shown.As shown, continuous casting
The system of making includes container 1, gas source 2 and condenser 3.Container 1 has an inner cavity in the present embodiment, and is connected to respectively with the inner cavity
First the 101, second opening 102 of opening, the first opening 101 is for the added material into container 1, therefore it is preferably placed at container 1
Top, and the area being open is larger, and the second opening 102 is for flowing out container 1 for metal-base composites slurries, therefore it is located at
The bottom of container 1, and the area being open is smaller.
In the present embodiment, container 1 includes staving 11 (crystallizer) and upper cover 12, and upper cover 12 is separable to be connected to staving 11
On, when upper cover 12 is separated with staving 11, the inner cavity of staving 11 can be connected to by the second opening 102 with the external of container 1；Upper cover 12
When being tightly connected with staving 11, second opening 102 of the closing of upper cover 12.Specific connection type is referring to Fig.1 with Fig. 2, and wherein Fig. 2 is bucket
The enlarged diagram of body 11 and 12 connecting portion of upper cover, the lower end surface of upper cover 12 have the groove of annular, the inner surface of the groove
Sealing surface as upper cover 12.The upper surface of staving 11 has the seal groove of annular, the inner surface of the seal groove and the upper surface
As the sealing surface of staving 11, in the lower part embedding sealing slot of copper sealing ring 13, upper part is stretched out out of slot.When upper cover 12
When contacting with staving 11, in the groove of the top of upper cover 12 insertion staving 11, sealing carbon felt 14 is positioned there between, and respectively with
The upper surface of staving 11, the sealing surface of upper cover 12 fit closely, and copper sealing ring 13 is located at the sealing surface and sealing carbon felt of staving
Between 14.After upper cover 12 and 11 further progress of staving fasten, the two compresses sealing carbon felt 14, real in conjunction with copper sealing ring 13
Sealed connection between existing staving 11 and upper cover 12.High temperature of the present invention can satisfy using sealing carbon felt 14 and copper sealing ring 13
Seal request under environment.
Gas source 2 uses high pressure gas cylinder in the present embodiment, and the tracheae connecting with high pressure gas cylinder is opened by 12 top of upper cover
Mouth stretches to the inside of container 1.Gas in gas cylinder is inert gas, to avoid with the metal-base composites slurries in container
Reaction.
Condenser 3 is located at the outside of 1 bottom of container, and condensation channel is connected to the second opening 102, from the second opening 102
The metal-base composites slurries of outflow can be condensed at condenser 3 to form metal-base composites blank.
Further include having electromagnetic stirrer coil 4 in the present embodiment, electromagnetic stirrer coil 4 after powered up can be to container 1 inside
Metal-base composites slurries apply electromagnetic force, with to metal-base composites slurries carry out electromagnetic agitation, facilitate metal
Based composites slurries are flowed out out of container 1.
It further include having aligning leveller 5, aligning leveller 5 is located at the lower section of condenser 4, specifically includes in the present embodiment
To roller, the metal-base composites blank that can be formed to condensation to roller rotation squeeze multiple groups, to realize to from blank
Aligning smoothing.
In the other embodiments of continuous casting system, an air inlet can also be individually opened up on staving 11, with height
The tracheae of air bottle connection stretches to the inside of container 1 by the air inlet, at this point, the air inlet is opened as the second of container
Mouthful.
In the other embodiments of continuous casting system, stirring pawl can also be added in container, to metal-based compound
Material slurry carries out mechanical stirring.Mechanical stirring and electromagnetic agitation can select a selection, can also be used cooperatively jointly.
The invention also discloses a kind of continuous casings to show the process of continuous casing of the present invention referring to Fig. 3
Schematic diagram, specifically includes the following steps:
The first step, preparation include the continuous casting system of container and gas source, wherein have inner cavity in container, and respectively
First be connected to inner cavity is open, second is open, gas source and reservoir.
Second step injects metallic matrix melt into the inner cavity of container, and ceramic phase then is added into metallic matrix melt
Particle obtains metal-base composites slurries after agitated, and the height of metal-base composites slurries meets following conditions: can flood
Not the first opening, and the ullage of metal-base composites slurries has the cavity with the second open communication.Wherein, ceramic phase
The mass ratio of particle and metallic matrix melt is 1:10 to 2:3.Mixing parametric are as follows: whipping temp is 590-750 DEG C, pressure environment
For 3000Pa vacuum below or argon atmosphere, mixing speed 200-700R/min, mixing time 15-45min.
Third step injects inert gas into cavity by gas source, to increase the air pressure in cavity, Metal Substrate is answered
Condensation material slurries are squeezed out from the first opening.
4th step condenses to obtain metal-base composites blank the metal-base composites slurries of extrusion.
In the prior art using drawing scheme, i.e., the blank that has solidified of direct pull, blank drive be adhered therewith again
Slurries, the bonding strength between blank and slurries is small.Further, since the area of solid-liquid freezing interface is cut much smaller than entire slurries
The area in face, pulling force can be considered as the regional area for concentrating on slurries section, lead to discontinuity, and the above reason causes to hold very much
Dialysis phenomenon easily occurs.The present invention using pressed gas as the power source for pushing slurries to squeeze out, uniformly applied by liquid level by pressure
It is added on whole slurries, can effectively reduce dialysis phenomenon compared with the prior art.
Preferably, in extrusion process, pressure suffered by the solid-liquid freezing interface forward position of metal-base composites slurries is protected
It holds constant, wherein so-called " keeping constant " had both included the constant situation of pressure, also included the feelings fluctuated in pressure a certain range
Shape, fluctuation range are preferably 1.001-1.6 atmospheric pressure, preferably 1.05-1.5 atmospheric pressure.
In order to realize the steady extruding of slurries, pressure suffered by the solid-liquid freezing interface forward position of metal-base composites slurries
Preferably remain constant, and with the outflow of slurries, liquid level gradually declines, and pressure suffered by the forward position of solid-liquid freezing interface also will be with
It reduces, therefore, the gas flow of the inert gas injected in cavity should be stepped up, to make up the pressure lost by slurries outflow
Power.To achieve the above object, the increase of inert gas should meet: in the case of slurries extruded velocity is constant, open from distance
The t moment to begin after squeezing out, Pt=P0+gρVtS1/S2, wherein PtFor the pressure in cavity, P0For solid-liquid freezing interface forward position institute
By pressure, ρ is serum density, and V is the extruded velocity of slurries, S2For the cross-sectional area of slurries, S1For the cross section of the first opening
Product.
Preferably, in order to avoid the liquid level that high pressure draught directly impacts slurries, the present invention at the gas access of container also
It is provided with flow-stopping plate, flow velocity can be significantly reduced in high pressure draught after the blocking of flow-stopping plate.
In the other embodiments of continuous casing, the preparation of metal-base composites slurries can be in external crucible
Then the metal-base composites slurries prepared are transferred in container by middle completion again.Shift metal-base composites slurries
Method include that crucible verts so that metal-base composites slurries in crucible inject container, need to have on container at this time
There is separable upper cover.Further, since the preparation step of metal-base composites slurries needs to spend compared to extrusion step
Take more times, therefore the crucible that multiple groups are in different agitation phases can be set, improves production efficiency.
The method of transfer metal-base composites slurries further includes one runner of setting, which is separately connected crucible and holds
Device.Simultaneously in control units such as the connectivity part of crucible and runner setting valves, operating the control unit may make runner to be in disconnected
Open state or connected state.After the completion of the metal-base composites slurries preparation in crucible, slurries can be made by opening valve
Container is injected, upper cover can be not provided on container at this time, but directly open up runner mouth on closed staving.
Herein referred " solid-liquid freezing interface " refers to the first opening melt slurry flows condenser, and constantly cools down
Until liquid slurry is frozen into the interface of solid union material during solidification.It is herein referred " before solid-liquid freezing interface
Edge " refers to a bit of region of the solid-liquid freezing interface to liquid melts side.
Illustrate below by way of specific embodiment:
First embodiment
Step 1: every batch of provide ceramic phase particles be SiC ceramic particle 6kg, 10 microns of average grain diameter, ceramic particle
Vacuum drying oven heat preservation is put into for 24 hours after 600 DEG C keep the temperature pretreatment in 4 hours；Metallic matrix melt is A356 grade aluminium alloy 24kg,
It will stablize after the clean aluminium alloy of pickling under vacuum conditions (< 100Pa) heating fusing at 590-610 DEG C, time-consuming 15min will
Whole SiC ceramic particles put into melt and stir, and speed of agitator 200-500R/min enables melt composition stabilizing vortex by particle
It is involved in melt and does not generate splashing, be stirred for 20min after whole powders investment, form composite material mixed slurry.
Step 2: by the composite material sizing agent 30kg metaideophone to crystallizer being uniformly mixed in crucible, crucible feeds intake again again
Multiple step 1.
Step 3: using alternating electromagnetic field further uniform stirring composite material sizing agent, the electromagnetic field used in crystallizer
Parameter are as follows: sine-wave current frequency 20Hz, current peak intensity 10A；
Step 4: covering upper cover, and inject argon gas into crystallizer, argon gas initial flow rate is 200ml/min, enables crystallizer
Internal pressure forces by force as 1.1 atmospheric pressure, then opens the second opening (discharge port) below crystallizer, at the same start condenser and
Leveller is aligned, is discharged with the speed of 100mm/min, the flow of argon gas is continuously increased during discharging, enables pressure in crystallizer
Pressure is gradually increased to 1.15 atmospheric pressure.
In the present embodiment, due to step 1 and followed by step 2 constantly repeat, so as to continual to crystallization
Composite material sizing agent is supplemented in device, step 3 carries out always, and step 4 intermittently carries out, and realizes the continuously casting of the embodiment.It should
The mass fraction of ceramic phase is 20% in the composite material blank of embodiment preparation, and volume fraction 17.5%, the present embodiment is made
The microstructure of standby composite material blank is as shown in figure 4, it can be seen from the figure that the dense structure of composite material.
Second embodiment
Step 1: the ceramic phase particles that every batch of provides are B4C ceramic particle 9.3kg, 10-44 microns of particle diameter distribution, ceramic
Particle is put into vacuum drying oven heat preservation for 24 hours after 400 DEG C keep the temperature pretreatment in 2 hours；Metallic matrix melt is to be with Al-Ti10 alloy
Aluminium alloy 20.7kg that form is put into, containing Ti5%, under vacuum conditions (< 100Pa) by the clean aluminium alloy of alcohol wipe
Stablize after heating fusing at 640-680 DEG C, whole B4C ceramic particles are put into melt and stirred by time-consuming 20min, and speed of agitator is
300-600R/min enables melt composition stabilizing vortex that particle is involved in melt and does not generate splashing, after whole powders investment
It is stirred for 30min, forms composite material mixed slurry.
Step 2: by the composite material sizing agent 30kg metaideophone to crystallizer being uniformly mixed in crucible, crucible feeds intake again again
Multiple step 1.
Step 3: using alternating electromagnetic field further uniform stirring composite material sizing agent, the electromagnetic field used in crystallizer
Parameter are as follows: sine-wave current frequency 30Hz, current peak intensity 20A.
Step 4: covering upper cover, and inject argon gas into crystallizer, argon gas flow velocity is 400ml/min, enables crystallizer internal pressure
Power is 1.2 atmospheric pressure, then opens the second opening (discharge port) below crystallizer, while starting condenser and aligning smoothing
Device is discharged with the speed of 60mm/min, and the flow of argon gas is continuously increased during discharging, enable in crystallizer pressure be gradually increased to
1.25 a atmospheric pressure.
In the present embodiment, due to step 1 and followed by step 2 constantly repeat, so as to continual to crystallization
Composite material sizing agent is supplemented in device, step 3 carries out always, and step 4 intermittently carries out, and realizes the continuously casting of the embodiment.It should
The mass fraction of ceramic phase is 31% in the composite material blank of embodiment preparation, and volume fraction 33.5%, the present embodiment is made
The microstructure of standby composite material blank is as shown in figure 5, the as can be seen from the figure dense structure of composite material, pore-free etc.
Casting flaw, wherein reinforced phase particle is uniformly dispersed unanimously.
3rd embodiment
The difference of the present embodiment and second embodiment is argon gas in the ratio variation and step 4 of each component in step 1
The variation of flow velocity and discharging speed.
The ceramic phase particles that every batch of provides in step 1 are B4C ceramics 4.5kg；Metallic matrix is the aluminium alloy containing Ti2%
25.5kg.Argon gas flow velocity is 800ml/min in step 4, and enabling pressure in crystallizer is 1.5 atmospheric pressure, and with 120mm/min's
Speed discharging, is continuously increased the flow of argon gas, pressure in crystallizer is enabled to be gradually increased to 1.55 atmospheric pressure during discharging.This
Embodiment is since the mass fraction of ceramic enhancement phase particle is reduced to 15%, volume fraction 16%, therefore pressing speed and discharging
Speed can be accelerated.
Fourth embodiment
The difference of the present embodiment and second embodiment is the ratio variation of each component in step 1, saves the electricity in step 3
The variation of argon gas flow velocity and discharging speed in magnetic whipping step and step 4.
It is B4C ceramics 3kg that every batch of, which provides ceramic phase particles, in step 1；Metallic matrix is the aluminium alloy containing Ti1%
27kg.Argon gas flow velocity is 1000ml/min in step 4, and enabling crystallizer internal pressure force by force is 1.5 atmospheric pressure, and with 200mm/
The speed of min discharges, and the flow of argon gas is continuously increased during discharging, enables crystallizer internal pressure force and is gradually increased to 1.55 by force
Atmospheric pressure.The present embodiment is since the mass fraction of ceramic enhancement phase particle is reduced to 10%, volume fraction 11%, melt viscosity
The step of low, pressing speed and discharging speed can be further speeded up, and apply electromagnetic agitation in step 3 also can be omitted.This
Although the microstructure of composite material blank prepared by embodiment is not as shown in fig. 6, it can be seen from the figure that because apply electricity
Magnetic stirring, there are a small amount of stomata inside blank, but the dense structure of composite material, wherein reinforced phase particle is uniformly dispersed one
It causes, i.e., this programme still can be implemented.
It is to be illustrated to what preferable implementation of the invention carried out, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (14)
1. a kind of continuous casing of metal-base composites blank, includes the following steps,
S10 provides container, and container includes inner cavity, and the first opening, the second opening that are connected to respectively with inner cavity；
S20 makes metal-base composites slurries flood first opening, and the ullage tool of metal-base composites slurries
There is the cavity with second open communication；
S30, which is open by second into cavity, injects inertia pressure gas, by the metal-base composites slurries from first
It is squeezed out in opening；
S40 cools down to obtain metal-base composites blank the metal-base composites slurries of extrusion.
2. the continuous casing of metal-base composites blank according to claim 1, which is characterized in that in step
Before S20, include the steps that preparing metal-base composites slurries S11, step S11 includes: that injection in the container is golden
Belong to matrix melt, ceramic phase particles are then added into metallic matrix melt, obtain the metal-base composites after agitated
Slurries.
3. the continuous casing of metal-base composites blank according to claim 1, which is characterized in that in step
Before S20, include the steps that preparing metal-base composites slurries S11, step S11 includes: to inject in external crucible
Then ceramic phase particles are added into metallic matrix melt, obtain the metal-based compound material after agitated for metallic matrix melt
Slurry liquid, then the metal-base composites slurries are transferred in the container.
4. the continuous casing of metal-base composites blank according to claim 3, which is characterized in that by the gold
Metal-matrix composite material slurries are transferred to the method in the container are as follows:
The crucible is verted, so that the metal-base composites slurries in crucible inject the container；
Alternatively, setting runner, the runner are separately connected the crucible and container；In the connectivity part of crucible and runner, control unit is set
Part, operating the control unit may make that runner is in an off state or connected state.
5. the continuous casing of metal-base composites blank according to any one of claim 2 to 4, feature exist
In, in step S11, mixing parametric are as follows: whipping temp is 590-750 DEG C, and pressure environment is 3000Pa vacuum below or argon gas
Protective atmosphere, mixing speed 200-700R/min, mixing time 15-45min.
6. the continuous casing of metal-base composites embryo material according to any one of claim 2 to 4, feature exist
In in step S11, the mass ratio of ceramic phase particles and metallic matrix melt is 1:10 to 2:3.
7. the continuous casing of metal-base composites embryo material according to any one of claim 1 to 4, feature exist
In the container includes staving and upper cover, and upper cover is separable to be connected on staving, wherein described when upper cover is separated with staving
Inner cavity can be connected to by second opening with external container；When upper cover and staving are tightly connected, the upper cover closing second is opened
Mouthful.
8. the continuous casing of metal-base composites embryo material according to claim 7, which is characterized in that the staving
The sealing surface connecting with upper cover is equipped with seal groove, and the seal groove is embedded with copper sealing ring, when the upper cover and staving are close
Sealing carbon felt is equipped with when envelope connection, between the sealing surface of the staving and the sealing surface of upper cover, the copper sealing ring is located at bucket
Between the sealing surface and sealing carbon felt of body.
9. the continuous casing of metal-base composites embryo material according to claim 3 or 4, which is characterized in that setting
At least two are in the crucible of different agitation phases, and the metal-base composites slurries being successively completed in the crucible of stirring
It injects in the container.
10. the continuous casing of metal-base composites blank according to any one of claim 1 to 4, feature
It is, further includes the step that the metal-base composites slurries in the container are stirred in the extrusion process of step S30
Suddenly, the method for stirring are as follows: setting stirring pawl carries out mechanical stirring, and/or setting hot-wire coil to metal-base composites slurries
Electromagnetic agitation is carried out to metal-base composites slurries.
11. the continuous casing of metal-base composites blank according to any one of claim 1 to 4, feature
It is, invariablenes pressure of liquid suffered by the solid-liquid freezing interface forward position of the metal-base composites slurries is within the set range.
12. the continuous casing of metal-base composites blank according to claim 11, which is characterized in that described solid
Pressure suffered by the forward position of liquid freezing interface is 1.001-1.6 atmospheric pressure.
13. the continuous casing of metal-base composites blank according to claim 11, which is characterized in that maintain institute
The method for stating invariablenes pressure of liquid suffered by the forward position of solid-liquid freezing interface are as follows: the gas flow of the inert gas in the cavity is injected in adjustment,
Pressure P so that the t moment after squeezing out since the distance, in the cavitytMeet Pt=P0+gρVtS1/S2, wherein P0For
Pressure suffered by the forward position of solid-liquid freezing interface, ρ are serum density, and V is the extruded velocity of slurries, S2For the cross-sectional area of slurries, S1For
The cross-sectional area of first opening.
14. a kind of continuous casting apparatus of metal-base composites blank, which is characterized in that including container and gas source, in container
With inner cavity, and the first opening, the second opening that are connected to respectively with inner cavity, the gas source and reservoir, wherein work as inner cavity
Interior receiving metal-base composites slurries, and metal-base composites slurries is made to flood the first opening, and metal-based compound material
When the ullage of slurry liquid has the cavity with the second open communication, gas source can inject inertia pressure gas into cavity, make
Metal-base composites slurries are obtained to squeeze out from the first opening.
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