CN110144478A - A kind of preparation facilities and method of high tough nanoparticle reinforced aluminum-based composite - Google Patents
A kind of preparation facilities and method of high tough nanoparticle reinforced aluminum-based composite Download PDFInfo
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- CN110144478A CN110144478A CN201910342032.2A CN201910342032A CN110144478A CN 110144478 A CN110144478 A CN 110144478A CN 201910342032 A CN201910342032 A CN 201910342032A CN 110144478 A CN110144478 A CN 110144478A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
- B01F33/811—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0036—Matrix based on Al, Mg, Be or alloys thereof
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
Abstract
The present invention relates to a kind of aluminum matrix composites, refer in particular to the preparation facilities and method of a kind of high tough in-situ nano particle enhanced aluminum-based composite material.It is characterized by: the spiral circulation stirring based on design is compound and squeezes integrated apparatus, aluminium substrate alloy is put into first after being heated to certain temperature and fusing in spiral circulation stirring set composite, it is put into reaction in-situ object, realize that in-situ nano is compound by the effect of spiral circulation stirring, then In-situ reaction melt is passed directly into helix extrusion device, and lower temperature is cooled in helix extrusion device, the large deformation shear action generated using screw motion in helix extrusion device, realize broken and matrix grain the refinement of nano particle " cluster " in the nanoparticle reinforced aluminum-based composite of fabricated in situ, the tough in-situ nano particle enhanced aluminum-based composite material profile of height of shape needed for being obtained finally by extruding end die forming.
Description
Technical field
The present invention relates to aluminum matrix composites, refer in particular to a kind of preparation dress of high tough nanoparticle reinforced aluminum-based composite
It sets and method.
Background technique
The fabricated in situ technique of aluminum matrix composite is the new technology developed in recent years, and in-situ endogenic is particle reinforced aluminium-based multiple
Condensation material has many advantages, such as that reinforcement size is small, thermal stability is good, interface bond strength is high, in Aeronautics and Astronautics, automobile, machinery
Equal industrial circles are widely used.In recent years some are single studies have shown that when reinforced particle size is decreased to nanoscale
The surface area of nano particle increased dramatically in the volume of position, complex intensifying effect greatly improves, to make nano-particle reinforcement aluminium base
Composite material has higher specific strength, specific modulus and high temperature resistance.But current generated in-situ nano-particle reinforcement aluminium base
Composite material still just has two large problems: (1) since the huge interface of nano particle can make generated in-situ nano particle become
In reunion, cause the obdurability of composite material lower；(2) coarse grains of as cast condition aluminum matrix composite are usually obtained, intensity mentions
It rises limited.
Being evenly distributed for nano particle is improved, reduces composite material casting flaw to greatest extent, refining composite material
Crystal grain has become at present while improving the important channel of the obdurability of in-situ nano particle enhanced aluminum-based composite material.But
The prior art is difficult to realize scale continuous production, a kind of patent of invention " original position aluminium of such as domestic publication number CN103668013B
Based composites superplastic pre-treatment method " is stirred the in-situ nano particle enhanced aluminum-based composite material of gained as cast condition
Processing technology (FSP) processing that rubs is realized so that the distribution of nano particle becomes uniformly, to obtain Ultra-fine Grained aluminum matrix composite
Strong plasticity improves simultaneously, but FSP complex process, and machining area is extremely limited, it is difficult to realize industrial application.
Summary of the invention
The purpose of the present invention is to the deficiencies in the prior art, as received in in-situ nano particle enhanced aluminum-based composite material
Rice grain tends to reunite: as-cast grain size is more coarse: nano particle only plays the invigoration effect of reinforcement, and strength enhancing has
Limit etc., a kind of preparation method and its preparation facilities for realizing high tough aluminum matrix composite of proposition, sufficiently improvement nano particle
" cluster ", so that it is evenly distributed, and greatly refine aluminum matrix composite crystal grain, increase substantially the tough of composite material
Property.
The present invention is compound using the spiral circulation stirring of autonomous Design and squeezes integrated apparatus, on the one hand by constantly following
Ring stirring keeps ingredient more uniform and promotes in-situ nano compound, on the other hand at a lower temperature, is filled using screw extrusion
The big shear action that screw motion in setting generates makes composite material generate large deformation, the synchronous nano particle for realizing fabricated in situ
Broken and matrix grain the refinement of " cluster ", obtains high tough in-situ nano particle-reinforced aluminum in reinforced aluminum matrix composites
Basis composite material sectional material.
The spiral circulation stirring that the present invention designs is compound to stir compound dress with extruding integrated apparatus, including spiral circulation
It sets, helix extrusion device and mold, spiral circulation stirring set composite, helix extrusion device and mold are sequentially communicated；Motor is logical
The gear that transmission device stirs set composite and helix extrusion device with spiral circulation respectively is crossed to connect；Spiral circulation stirring is compound
Load coil is equipped with around the crucible of device and helix extrusion device；Circular cone shape crucible section is in inverted trapezoidal；With gear
The circular cone shape crucible-type that the propeller of connection protrudes into spiral circulation stirring set composite is intracavitary, the spiral connecting with gear
The circular cone shape crucible-type that pressure ram protrudes into helix extrusion device is intracavitary；The type chamber bottom of spiral circulation stirring set composite is set
There is sliding block, realize the spiral circulation stirring of compounding flux or enters the adjusting of helix extrusion device；Circulating line is followed positioned at spiral
Ring stirs the outside of set composite crucible, and the bottom that spiral circulation stirs the type chamber of set composite passes through circulating line and type chamber
Top connection；The extruding end of helix extrusion device is connected with mold.
The crucible of the spiral circulation stirring set composite is graphite crucible；The crucible of the helix extrusion device is
Heat-resisting die steel crucible.
Crucible, load coil, circulating line and the sliding block of the spiral circulation stirring set composite are respectively positioned on load-bearing
Keep the temperature the inside of outer wall.
The crucible and load coil of the helix extrusion device are located at the inside of load bearing heat preserving outer wall.
The present invention is based on the spiral circulation of design stirring it is compound with squeeze integrated apparatus, by specific steps below into
Row:
(1) aluminium substrate alloy is put into spiral circulation stirring set composite first and is heated to certain temperature and fusing
Afterwards, it is put into reaction in-situ object, realizes that in-situ nano is compound by the effect of propeller spiral circulation stirring, generates nanometer and increase
Strong body particle；
(2) In-situ reaction melt is then passed directly into helix extrusion device, and be cooled in helix extrusion device compared with
Low temperature realizes receiving for fabricated in situ using the large deformation shear action that the movement of screw extrusion bar generates in helix extrusion device
Broken and matrix grain the refinement of nano particle " cluster " in rice grain reinforced aluminum matrix composites；
(3) the tough in-situ nano of height of shape needed for obtaining finally by extruding end die forming is particle reinforced aluminium-based compound
Material profile.
The spiral circulation stirring is compound and squeezes integrated apparatus, is to stir set composite and spiral by spiral circulation
Two parts of pressurizing unit form, and have sliding block to adjust melt circulation and be passed through screw extrusion in spiral circulation stirring set composite
Device.In-situ synthesized reaction occurs inside spiral circulation stirring set composite, and last aluminum matrix composite is filled by screw extrusion
Extrusion is set, to realize the continuously shaped of material.
The aluminium substrate alloy is different (thermally conductive, conductive, high-strength, low bulk, wear-resisting etc.) according to particular use, Ke Yixuan
Select the different aluminium alloys such as fine aluminium, 2 systems, 5 systems, 6 systems, 7 systems, typicalness represents: fine aluminium, 2024,6061,6063,6082,
6016,6111,7055 etc..
In the step (1), nanometer reinforcement particle is the differential responses object reaction in-situ life in the melt by introducing
At Al2O3, ZrB2, TiB2In one to multiple kind, reinforced particle size is usually 2~100nm, and thermal stability is high, intensity
Height, high-temperature behavior is good, and the in-situ nano reinforced particulate high with basal body interface bond strength, reinforcement accounts for aluminum matrix composite
0.2~25vol% of volume fraction.
Certain temperature in the step (1) refers to the generation temperature of reaction in-situ, usually 750 DEG C~900 DEG C it
Between, it is adjusted according to specific reaction system, reaction in-situ is to introduce a nanometer reinforcement particle formation element in the melt
Compound, reaction time are usually 25~30min, should be with stirring in reaction process, final fabricated in situ nanometer in the melt
Ceramic phase reinforcement；It is Co that the nanometer reinforcement particle, which forms element compound,3O4, K2ZrF6, K2TiF6, KBF4, Na2B4O7,
ZrO2, B2O3, Al2(SO4)3And K2ZrF6In one to multiple kind.
Lower temperature is cooled in the step (2) and is often referred to 300~550 DEG C, according to the different specific adjustings of alloy.?
Flow stress of metal is smaller at a temperature of this, is convenient for extrusion molding, and be crushed nanometer in composite material by shearing large deformation and increase
" cluster " of strong body, while refining matrix grain.
It is according to the mold of required profile design of different shapes, mold materials that terminal mould is squeezed out in the step (3)
For refractory steel, such as H13 steel, high-speed steel, high Gr steel.
The propeller and crucible of the spiral circulation stirring set composite using the high temperature resistant customized and are not involved in
The high purity graphite of reaction is made, wherein 20~30mm of agitating paddle screw pitch, blade thickness be 5~8mm, revolving speed be usually 10~
50r/min, it is 20~100mm that circular cone shape crucible interior top end diameter, which is 300~1500mm bottom diameter,.
The screw extrusion bar and crucible of the helix extrusion device use refractory steel, such as H13 steel, high-speed steel, height
Gr steel etc. is made, wherein 30~50mm of screw pitch of screw extrusion bar, the thickness of thread be 10~20mm, revolving speed be usually 20~
100r/min, it is 10~25mm that circular cone shape crucible interior top end diameter, which is 100~500mm bottom diameter,.
The method of the present invention is to stir the continuous circulation stirring of set composite by spiral circulation first, make homogenization of composition, so
So that composite material is generated large deformation by the big shear action generated using the screw motion in helix extrusion device afterwards, realizes former
Broken and matrix grain the refinement of " cluster " in the nanoparticle reinforced aluminum-based composite of position synthesis, to substantially improve
In in-situ nano particle enhanced aluminum-based composite material the problem of the serious agglomeration of nanometer reinforcement particle, make nanometer reinforcement in base
Disperse is uniformly distributed in body, while the size of the crystal grain of aluminum matrix composite can be greatly reduced again, thick in refining composite material
Big precipitated phase, eliminates casting flaw to the greatest extent, improves the consistency and uniformity of composite material, and at the same time improving
The strength and toughness of in-situ nano particle enhanced aluminum-based composite material.The method and preparation facilities is easy to operate, continuity is strong, is fitted
Close large-scale application.
Detailed description of the invention
Fig. 1 is that spiral circulation stirring of the invention is compound with extruding integrated apparatus schematic diagram: 1 gear, 2 motors, 3 are driven
Device, 4 propellers, 5 load coils, 6 graphite crucibles, 7 heat-resisting die steel crucibles, 8 sliding blocks, 9 circulating lines, 10 spiral shells
Revolve pressure ram, 11 extrusion dies.
Fig. 2 is 3vol%ZrB2The distribution of particles TEM figure of the aluminum matrix composite of/6016Al system direct in-situ synthesis.
Fig. 3 is 3vol%ZrB2The distribution of particles for the aluminum matrix composite that/6016Al system is prepared using apparatus of the present invention
TEM figure.
Specific embodiment
The present invention is implemented according to following example, but is not limited to following instance: term as used in the present invention, unless
There is other explanation, generally there is the normally understood meaning of those of ordinary skill in the art, it should be understood that；These examples are intended merely to
It illustrates the present invention, rather than limits the scope of the invention in any way；Below in an example, what is be not described in detail is each
Kind process and method are conventional methods as known in the art.
Embodiment 1
With K2ZrF6And KBF4As reactant, according to 3vol% nanometers of ZrB of generation2Particle carries out stoicheiometry, will mix
Reactant powders after grinding are spare in 200 DEG C of drying 2h；6016 aluminium alloys are placed in spiral circulation stirring set composite, benefit
Heating fusing is carried out with induction coil, when temperature reaches 870 DEG C, spiral circulation is added in the reactant powders after mixed grinding
Stir set composite；It opens spiral circulation and stirs set composite, revolving speed is that spiral is turned up and follows after 10~30r/min reacts 30min
Ring stirs the revolving speed of set composite to 30~50r/min, and after stirring 20min, standing, degasification, slagging-off are down to 720 DEG C to temperature
When be passed through helix extrusion device.Continue to be cooled to 300 DEG C later, open helix extrusion device, revolving speed is 20~50r/min, is squeezed
Aluminum matrix composite obtains in-situ nano 3vol%ZrB to mold out2/ 6016Al composite material squeeze wood.It is solid by 530 DEG C
Molten 1h+175 DEG C of timeliness 8h, the tensile strength of composite material are 426MPa, yield strength 382MPa, elongation percentage 12%.
Fig. 2 is 3wt.%ZrB2The distribution of particles TEM figure of the aluminum matrix composite of/6016Al system direct in-situ synthesis,
The result shows that: the ZrB of direct in-situ synthesis2Particle will appear a large amount of cluster, and this institutional framework will lead to the mechanics of material
Performance is unstable.
Fig. 3 is distribution of particles of the 3vol%ZrB2/6016Al system using the aluminum matrix composite of apparatus of the present invention preparation
TEM figure.The result shows that: in the case where stirring the compound processing with extruding integrated apparatus using spiral circulation shown in this patent, pole
The big uniformity for improving material structure, effectively realizes a nanometer ZrB2Particle clusters are broken and disperse.
Embodiment 2
With K2ZrF6And Na2B4O7As reactant, according to 5vol% nanometers of ZrB of generation2+Al2O3Particle carries out chemistry and matches
Than the reactant powders after mixed grinding are spare in 300 DEG C of drying 3h；It is compound that 6082 aluminium alloys are placed in spiral circulation stirring
In device, heating fusing is carried out using induction coil, when temperature reaches 850 DEG C, the reactant powders after mixed grinding are added
Enter spiral circulation stirring set composite；It opens spiral circulation and stirs set composite, revolving speed is 10~30r/min, reacts 30min
Afterwards, the revolving speed of spiral circulation stirring set composite is turned up to 30~50r/min, after stirring 20min, standing, degasification, slagging-off, to
Temperature is passed through helix extrusion device when being down to 720 DEG C.Continue to be cooled to 400 DEG C later, opens helix extrusion device, revolving speed 50
~80r/min squeezes out aluminum matrix composite to mold.By 1h+165 DEG C of timeliness 10h of 540 DEG C of solid solutions, the tension of composite material
Intensity is 452MPa, yield strength 395MPa, elongation percentage 10%.
Embodiment 3
With K2ZrF6, K2TiF6And KBF4For reactant, according to generating 3vol%ZrB2Particle, 1vol%TiB2Particle carries out
Stoicheiometry, the reactant powders after mixed grinding are spare in 200 DEG C of drying 3h；It is multiple that 7055Al is placed in spiral circulation stirring
It attaches together in setting, carries out heating fusing using induction coil, when temperature reaches 900 DEG C, by the reactant powders after mixed grinding
Spiral circulation is added and stirs set composite；It opens spiral circulation and stirs set composite, revolving speed is 10~30r/min, reacts 30min
Afterwards, the revolving speed of spiral circulation stirring set composite is turned up to 30~50r/min, after stirring 20min, standing, degasification, slagging-off, to
Temperature is passed through helix extrusion device when being down to 720 DEG C.Continue to be cooled to 450 DEG C later, opens helix extrusion device, revolving speed 70
~100r/min squeezes out aluminum matrix composite to mold.For 24 hours by 3h+120 DEG C of timeliness of 450 DEG C of solid solutions, the tension of composite material
Intensity is 680MPa, yield strength 495MPa, elongation percentage 8%.
Embodiment 4
With Al2(SO4)3Powder is reactant, according to 15vol% nanometers of Al of generation2O3Particle carries out stoicheiometry, will mix
Reactant powders after grinding are spare in 200 DEG C of drying 2h；6063Al is placed in spiral circulation stirring set composite, sense is utilized
It answers coil to carry out heating fusing, when temperature reaches 780 DEG C, spiral circulation stirring is added in the reactant powders after mixed grinding
Set composite；It opens spiral circulation and stirs set composite, revolving speed is 10~30r/min, and after reacting 30min, spiral circulation is turned up
The revolving speed of set composite is stirred to 30~50r/min, after stirring 20min, standing, degasification, slagging-off, when temperature is down to 720 DEG C
It is passed through helix extrusion device.Continue to be cooled to 550 DEG C later, open helix extrusion device, revolving speed is 30~80r/min, is squeezed out
Aluminum matrix composite is to mold.By 2h+165 DEG C of timeliness 18h of 560 DEG C of solid solutions, the tensile strength of composite material is 456MPa, is bent
Taking intensity is 422MPa, elongation percentage 13%.
Claims (10)
1. a kind of preparation facilities of high tough nanoparticle reinforced aluminum-based composite, which is characterized in that the preparation facilities packet
Include spiral circulation stirring set composite, helix extrusion device and mold, spiral circulation stir set composite, helix extrusion device and
Mold is sequentially communicated；The gear that motor stirs set composite and helix extrusion device by transmission device with spiral circulation respectively connects
It connects；Spiral circulation, which stirs, is equipped with load coil around the crucible of set composite and helix extrusion device；Circular cone shape crucible
Section is in inverted trapezoidal；The propeller connecting with gear protrudes into the circular cone shape crucible-type chamber of spiral circulation stirring set composite
Interior, the circular cone shape crucible-type that the screw extrusion bar connecting with gear protrudes into helix extrusion device is intracavitary；Spiral circulation stirring is multiple
It attaches together the type chamber bottom set and is equipped with sliding block, realize the spiral circulation stirring of compounding flux or enter the tune of helix extrusion device
Section；Circulating line is located at the outside of spiral circulation stirring set composite crucible, and spiral circulation stirs the bottom of the type chamber of set composite
Portion is connected to by circulating line with the top of type chamber；The extruding end of helix extrusion device is connected with mold.
2. a kind of preparation facilities of high tough nanoparticle reinforced aluminum-based composite as described in claim 1, feature exist
In the crucible of the spiral circulation stirring set composite is graphite crucible；The crucible of the helix extrusion device is heat-resisting
Mold steel crucible；The extruding end mold materials are refractory steel.
3. a kind of preparation facilities of high tough nanoparticle reinforced aluminum-based composite as described in claim 1, feature exist
In crucible, load coil, circulating line and the sliding block of the spiral circulation stirring set composite are respectively positioned on outside load bearing heat preserving
The inside of wall；The crucible and load coil of the helix extrusion device are located at the inside of load bearing heat preserving outer wall.
4. a kind of preparation facilities of high tough nanoparticle reinforced aluminum-based composite as described in claim 1, feature exist
In the propeller and crucible of the spiral circulation stirring set composite are made of graphite, wherein agitating paddle spiral segment
Away from 20~30mm, blade thickness be 5~8mm, revolving speed is usually 10~50r/min；Circular cone shape crucible interior top end diameter is 300
~1500mm bottom diameter is 20~100mm.
5. a kind of preparation facilities of high tough nanoparticle reinforced aluminum-based composite as described in claim 1, feature exist
Use refractory steel in the screw extrusion bar of, the helix extrusion device, wherein 30~50mm of screw pitch of screw extrusion bar,
The thickness of thread is 10~20mm, revolving speed is usually 20~100r/min；Circular cone shape crucible interior top end diameter be 100~
500mm bottom diameter is 10~25mm.
6. the method for preparing high tough nanoparticle reinforced aluminum-based composite using device as described in claim 1, feature
It is, the specific steps are as follows:
(1) aluminium substrate alloy is put into first after being heated to certain temperature and fusing in spiral circulation stirring set composite, is put
Enter reaction in-situ object, realizes that in-situ nano is compound by the effect of propeller spiral circulation stirring, generate nanometer reinforcement
Particle；
(2) In-situ reaction melt is then passed directly into helix extrusion device, and be cooled in helix extrusion device compared with low temperature
Degree realizes the nanometer of fabricated in situ using the large deformation shear action that the movement of screw extrusion bar generates in helix extrusion device
Broken and matrix grain the refinement of nano particle " cluster " in grain reinforced aluminum matrix composites；
(3) the tough in-situ nano particle enhanced aluminum-based composite material of height of shape needed for being obtained finally by extruding end die forming
Profile.
7. method as claimed in claim 6, which is characterized in that the aluminium substrate alloy is according to particular use difference, selection
Fine aluminium, 2 systems, 5 systems, 6 systems or 7 line aluminium alloys.
8. method as claimed in claim 6, which is characterized in that in step (1), nanometer reinforcement particle is the difference by introducing
The reactant Al that reaction in-situ generates in the melt2O3, ZrB2, TiB2In one to multiple kind, reinforced particle size is usually 2
~100nm, thermal stability is high, and intensity is high, and high-temperature behavior is good, the in-situ nano particle enhancing high with basal body interface bond strength
Body, reinforcement account for 0.2~25vol% of the volume fraction of aluminum matrix composite.
9. method as claimed in claim 6, which is characterized in that the certain temperature in the step (1) refers to reaction in-situ
Generation temperature adjusted usually between 750 DEG C~900 DEG C according to specific reaction system, reaction in-situ is in order to molten
Nanometer reinforcement particle is introduced in body and forms element compound, and the reaction time is usually 25~30min, should be in reaction process
Stirring, finally fabricated in situ nano ceramics reinforcement in the melt；The nanometer reinforcement particle forms element compound
Co3O4, K2ZrF6, K2TiF6, KBF4, Na2B4O7, ZrO2, B2O3, Al2(SO4)3And K2ZrF6In one to multiple kind.
10. method as claimed in claim 6, which is characterized in that be cooled to lower temperature in the step (2) and be often referred to
300~550 DEG C, according to the different specific adjustings of alloy；The flow stress of metal is smaller at this temperature, is convenient for extrusion molding, and
It is crushed " cluster " of nanometer reinforcement in composite material by shearing large deformation, while refining matrix grain.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373347A (en) * | 2021-05-28 | 2021-09-10 | 江苏大学 | High-strength, high-toughness, high-heat-conductivity and easy-welding aluminum-based composite material for 5G base station and preparation method thereof |
| CN114990415A (en) * | 2022-06-15 | 2022-09-02 | 中国重汽集团济南动力有限公司 | Nano biphase reinforced aluminum-based composite material and 3D printing forming method thereof |
| CN114990390A (en) * | 2022-05-26 | 2022-09-02 | 江苏大学 | Preparation method of in-situ synthesized binary nanoparticle reinforced aluminum matrix composite |
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| CN114990415A (en) * | 2022-06-15 | 2022-09-02 | 中国重汽集团济南动力有限公司 | Nano biphase reinforced aluminum-based composite material and 3D printing forming method thereof |
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