CN105478724B - A kind of high-entropy alloy particle enhanced aluminum-based composite material and its stirring casting preparation technology - Google Patents
A kind of high-entropy alloy particle enhanced aluminum-based composite material and its stirring casting preparation technology Download PDFInfo
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Abstract
The present invention discloses a kind of high-entropy alloy particle enhanced aluminum-based composite material and its stirring casting preparation technology.The preparation technology of the present invention, is to prepare high-entropy alloy powder using mechanical alloying and sieve, and obtains high-entropy alloy particle；High-entropy alloy particle is sealed using with the aluminium-alloy pipe of matrix same material, and the matrix for load weighted aluminium-alloy pipe will be segmented being added to melting；High-entropy alloy particle is disperseed using agitating mode；Shaping high-entropy alloy particle enhanced aluminum-based composite material is prepared using casting technique.Wherein, high-entropy alloy particle is 0.1%~35%, and aluminium alloy is 65%~99.9%, and sum of the two is equal to 1.High-entropy alloy particle is uniform in microstructure of composite prepared by the present invention, Dispersed precipitate, and high-entropy alloy and aluminium alloy interface cohesion compatibility are good, with good intensity and toughness；Preparation technology is simple and powder need not be handled, cost is low, stability is good, is adapted to mass production and standardized production, with good popularizing application prospect.
Description
Technical field
The invention belongs to metal-base composites manufacture field, more particularly to a kind of high-entropy alloy is particle reinforced aluminium-based compound
Material and its stirring casting preparation technology.
Background technology
Aluminum matrix composite has high light weight, specific strength, heat endurance and excellent, the low thermal expansion system of electrical and thermal conductivity
Several and good wearabilities, has wide application background in fields such as Aero-Space, automobile, electronics, communications and transportation.At present
Aluminum matrix composite as bearing structure belongs to low volume fraction composite, and enhancing is generally mutually ceramic particle/fiber, metal
Particle/fiber and other materials etc., its content is between 0~35%.Low volume fraction aluminum matrix composite has high intensity
With good toughness, but it is present that design of material is theoretical, prepare shaping process aspect such as ceramic particle reinforcement and aluminum substrate it
Between wellability is poor, interface cohesion is bad and the unequal difficulty of distribution of particles, has had a strong impact on structure aluminum matrix composite
Large-scale production and popularization and application.High-entropy alloy has high intensity, good heat endurance, higher wearability and corrosion-resistant
The performances such as property, are a kind of fabulous structure of application prospect, functional material.Natural interface binding characteristic between metal-metal is come from,
Interface wet ability and interface compatibility between high-entropy alloy and alloy matrix aluminum is fabulous.Research shows, using high-entropy alloy conduct
Enhancing mutually carrys out activeness and quietness aluminium alloy, can solve that wellability between ceramic particle reinforcement and aluminum substrate is poor, interface cohesion not
Good the problems such as.Meanwhile, have been reported that and show that using stirring casting technique the problems such as distribution of particles is uneven can be solved very well.At present,
Using solid state process (including powder metallurgical technique, hot extrusion technique, hot pressed sintering and SPS sintering etc.) prepare high-entropy alloy
The report of particle enhanced aluminum-based composite material, but existing process is particle reinforced aluminium-based multiple in preparation shaping large scale high-entropy alloy
There is larger difficulty in terms of condensation material block, liquid rule has very big excellent in terms of shaping large-sized composite material is prepared
Gesture, is also the preferred technique of industrialized production.Prepared however, there is no so far using liquid phase process (including stirring casting technique)
The report of high-entropy alloy particle enhanced aluminum-based composite material.
The content of the invention
In order to overcome the design theory of particle enhanced aluminum-based composite material in the prior art and industrial large scale composite wood
Material prepares the shortcoming and deficiency of forming technology, and primary and foremost purpose of the invention is to provide a kind of high-entropy alloy particle reinforced aluminium-based multiple
The stirring casting preparation technology of condensation material.It is particle reinforced aluminium-based that the preparation technology of the present invention is that a kind of liquid phase process prepares high-entropy alloy
The new technology of composite, i.e. stirring casting technique, include high-entropy alloy particle preparation, powder sieving and encapsulation, stirring casting
The committed steps such as formed composite material, solve current structure with the large-scale production of high-entropy alloy particle enhanced aluminum-based composite material and
The problem of application.
It is particle reinforced aluminium-based multiple another object of the present invention is to provide the use high-entropy alloy that above-mentioned preparation technology is obtained
Condensation material.
The purpose of the present invention is achieved through the following technical solutions：
A kind of stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material, its material composition is special with composition
Levy and be：Matrix is various aluminium alloys, including wrought aluminium alloy, such as 1xxx, 2xxx, 4xxx, 5xxx, 6xxx, 7xxx alloy with
And Al-Li alloys；Matrix also includes cast aluminium alloy gold, such as Al-Si systems, Al-Cu systems, Al-Mg systems, Al-RE systems and Al-Zn systems.
Enhancing mutually be high-entropy alloy particle, including AlCoCrFeNiTi systems, AlCoCrCuFeNi systems, AlCoCrCuFeNiTi systems,
The high-entropy alloys such as AlCoCuFeNi and AlCoCrFeNi systems；Wherein, the volume fraction of high-entropy alloy particulates reinforcements 0.1%~
Between 35%, the volume fraction of alloy matrix aluminum is between 65%~99.9%, and sum of the two is equal to 1.
A kind of stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material, it prepares shaping process characteristic
It is：High-entropy alloy powder is prepared using mechanical alloying and sieved, high-entropy alloy particle is obtained；Using the aluminium with matrix same material
Alloy seal of tube high-entropy alloy particle, and the matrix for load weighted aluminium-alloy pipe will be segmented being added to melting；Using agitating mode
High-entropy alloy particle in dispersing matrixes melt；The shaping particle reinforced aluminium-based composite wood of high-entropy alloy is prepared using casting technique
Material.The present invention uses the schematic diagram of stirring casting moulding process as shown in Figure 1, and preparation technology flow is as shown in Figure 2.
The stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material of the present invention, is specifically included following
Step：
Step one：Prepare high-entropy alloy powder
According to the composition of high-entropy alloy, by five kinds or more than five kinds of pure metal powder according to respective different mole atom ratios
And mass fraction, the content of each composition in high-entropy alloy is calculated, and respective quality is weighed with electronic balance, then in mixed powder
6~24h of powder is mixed on machine, puts into stainless steel jar mill, vacuumizes and under argon atmosphere, celestial body of being expert at after being well mixed
Mechanical alloying is carried out on grinding machine, ratio of grinding media to material is 8：1, alloying time is 6~60h；Rotating speed is 150r/min~600r/min；
Process control agent is absolute ethyl alcohol, and temperature is to obtain high-entropy alloy powder after the completion of room temperature, alloying.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtain particle diameter distribution be 10~
500 μm of high-entropy alloy particle；High-entropy alloy particle after sorting is loaded to a diameter of 5~50mm aluminium with matrix same material
In compo pipe, it is compacted at normal temperatures and carries out segmented seal.
Step 3：Stirring casting formed composite material
Punching block and sealed aluminium-alloy pipe are incubated 1~2h at 200~300 DEG C, by matrix melts and in 680 DEG C~
780 DEG C of 20~40min of insulation, the aluminium-alloy pipe for being packaged with high-entropy alloy particle are segmented after weighing and are added in melting matrix,
Refining, degasification, slagging-off, 10~40min of matrix melt is stirred with 100~500r/min speed, subsequent cast molding, the demoulding,
Obtain high-entropy alloy particle enhanced aluminum-based composite material.
A kind of high-entropy alloy particle enhanced aluminum-based composite material, is prepared by above-mentioned stirring casting preparation technology.
The principle of preparation method of the present invention is：High-entropy alloy particle of the present invention is under high temperature (1200 DEG C), structure
It is stable, so that the generation and the formation of brittlement phase of the interfacial chemical reaction of general enhancing phase are avoided, it is in addition high in composite
Entropy alloy powder can form the physical bond type interface of the coherence of atom half with alloy matrix aluminum, and interface bond strength is high, interface
Wetability is good.Meanwhile, it is added to melting using high-entropy alloy particle is sealed with the aluminium-alloy pipe of aluminum matrix alloy same material
Aluminium alloy, and the high-entropy alloy particle disperseed using agitating mode in aluminium alloy melt, can obtain even particle distribution, disperse
Microstructure and good mechanics and physical property, contribute to product quality stable and large-scale production.
The present invention has the following advantages and effect relative to prior art：
(1) high-entropy alloy powder high-temperature stability of the present invention is good, and inoxidizability is stronger, and surface need not be changed
Learn processing and clean.
(2) liquid phase process technique of the present invention, its high-entropy alloy powder is good with alloy matrix aluminum wetability, forms diffusion
Mating type interface；Clean interfaces are smooth, and without obvious conversion zone, interface bond strength is high.
(3) stirring casting of the present invention, which prepares forming technology, can effectively reduce the group of enhancing phase high-entropy alloy particle
Poly- phenomenon, obtains even particle distribution, disperse, the few aluminum matrix composite of casting flaw.
(4) stirring casting of the present invention prepares that shaping process is simple, and equipment cost is low, be suitable for scale and
Standardized production.
(5) composite material preparation process of the present invention is simple and powder is without processing, the microstructure of composite produced
Middle high-entropy alloy even particle distribution, disperse, high-entropy alloy and aluminium alloy interface cohesion compatibility are good, with good intensity and
Toughness, preparation technology cost is low and stability is good, is adapted to mass production and standardized production, before good popularization and application
Scape.
Brief description of the drawings
Fig. 1 is the device structure schematic diagram of stirring casting moulding process of the present invention.
Fig. 2 is the preparation technology flow chart of the present invention for mixing cast shaping process.
Fig. 3 is high-entropy alloy/6061Al prepared by embodiment 1 metallographic structure figure.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Embodiment 1
Step one：Prepare high-entropy alloy powder
First, AlCoCuFeNi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
Al0.25CoCu0.75FeNi, according to high-entropy alloy Al0.25CoCu0.75The mole atom ratio and quality of each essential element point in FeNi
Number, the quality that each composition is calculated respectively is pure Al powder 18.38g, pure Co powder 160.56g, pure Cu powder 133.94g, pure Fe powder
152.19g, pure Ni powder 159.94g, and respective quality is weighed with electronic balance, it is mixed into powder 24h on mixed powder machine, is well mixed
Put into stainless steel jar mill, vacuumize, applying argon gas afterwards, then the ball milling 60h on planetary ball mill, ratio of grinding media to material is 8：1, rotating speed
For 200r/min, process control agent is absolute ethyl alcohol, prepares high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 30 μm
High-entropy alloy particle；30 μm of high-entropy alloy particle is fitted into a diameter of 5mm 6061 aluminium-alloy pipes, is compacted at normal temperatures
And segment encapsulation.
Step 3：Stirring casting technique prepares composite
Al0.25CoCu0.75The volume fraction of FeNi high-entropy alloys is 2%；Alloy matrix aluminum is 6061Al, and volume fraction is
98%；The quality for calculating 6061 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 117g, and is weighed with electronic balance.By punching block
With 6061 aluminium-alloy pipes for being packaged with high-entropy alloy particle in 250 DEG C of insulation 2h, 2Kg 6061Al bars are melted in 720 DEG C
After be incubated 30min, will segment encapsulation 6061 aluminium-alloy pipes add melting aluminium liquid in, refining, slagging-off, degasification, with 300r/
Cast molding, the demoulding after min mixing speed stirring 10min, obtain high-entropy alloy particle enhanced aluminum-based composite material.Stretching examination
Test result to show, the tensile strength of composite is 187MPa, and elongation percentage is 14.7%.Al0.25CoCu0.75FeNi high-entropy alloys
The metallographic structure of particle enhanced aluminum-based composite material is not reacted significantly as shown in figure 3, particle is uniformly dispersed in the base
Layer, interface cohesion is good.
Embodiment 2
Step one：Prepare high-entropy alloy powder
First, AlCoCrFeNi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
AlCoCrFeNi, according to the mole atom ratio and mass fraction of each essential element in high-entropy alloy AlCoCrFeNi, is calculated respectively
The quality for going out each composition is pure Al powder 66.80g, pure Co powder 145.90g, pure Cr powder 128.73g, pure Fe powder 138.27g, pure Ni powder
145.30g, and respective quality is weighed with electronic balance, it is mixed into powder 20h on mixed powder machine, stainless steel ball is put into after being well mixed
In grinding jar, vacuumize, applying argon gas, the subsequent ball milling 56h on planetary ball mill, ratio of grinding media to material is 8：1, rotating speed is 150r/min, mistake
Program control preparation is absolute ethyl alcohol, prepares high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 10 μm
High-entropy alloy particle；10 μm of high-entropy alloy particle is fitted into a diameter of 10mm 7075 aluminium-alloy pipes, pressed at normal temperatures
Real and segment encapsulation.
Step 3：Stirring casting technique prepares composite
The volume fraction of AlCoCrFeNi high-entropy alloys is 10%；Alloy matrix aluminum is 7075Al, and volume fraction is 90%；
The quality for calculating 7075 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 437.83g, and is weighed with electronic balance.By punching block and
7075 aluminium-alloy pipes for being packaged with high-entropy alloy particle are incubated 1h at 300 DEG C, by 2Kg 7075Al bars after 680 DEG C melt
20min is incubated, in the aluminium liquid that 7075 aluminium-alloy pipes of segment encapsulation are added to melting, refining, slagging-off, degasification, with 100r/min
Mixing speed stirring 40min after cast molding, the demoulding, obtain high-entropy alloy particle enhanced aluminum-based composite material.Tension test
As a result show, the tensile strength of composite is 310MPa, and elongation percentage is 12.3%.Observe AlCoCrFeNi high-entropy alloy particles
The metallographic structure of reinforced aluminum matrix composites is (similar to Fig. 3) to be found, even dispersion is distributed particle in the base, does not substantially cast
Make defect.
Embodiment 3
Step one：Prepare high-entropy alloy powder
First, AlCoCrCuFeNiTi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
Al0.25CoCrCu0.25FeNiTi0.25, according to high-entropy alloy Al0.25CoCrCu0.25FeNiTi0.25In each essential element mole original
Son ratio and mass fraction, the quality that each composition is calculated respectively is pure Al powder 16.18g, pure Co powder 141.35g, pure Cr powder
124.72g, pure Cu powder 39.31g, pure Fe powder 133.96g, pure Ni powder 140.77g, pure Ti powder 28.71g, and claimed with electronic balance
Respective quality is taken, it is mixed into powder 18h on mixed powder machine, is put into after being well mixed in stainless steel jar mill, is vacuumized, applying argon gas,
The subsequent ball milling 50h on planetary ball mill, ratio of grinding media to material is 8：1, rotating speed is 220r/min, and process control agent is absolute ethyl alcohol, system
It is standby go out high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 60 μm
High-entropy alloy particle；60 μm of high-entropy alloy particle is fitted into a diameter of 15mm 2024 aluminium-alloy pipes, pressed at normal temperatures
Real and segment encapsulation.
Step 3：Stirring casting technique prepares composite
Al0.25CoCrCu0.25FeNiTi0.25The volume fraction of high-entropy alloy is 15%；Alloy matrix aluminum is 2024Al, body
Fraction is 85%；The quality for calculating 2024 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 658.91g, and uses electronic balance
Weigh.By punching block and 2024 aluminium-alloy pipes for being packaged with high-entropy alloy particle in 250 DEG C of insulation 2h, by 2Kg 2024Al bars
25min is incubated after being melted in 700 DEG C, in the aluminium liquid that 2024 aluminium-alloy pipes of segment encapsulation are added to melting, refines, remove the gred, remove
Gas, with cast molding, the demoulding after 200r/min mixing speed stirring 20min, obtains high-entropy alloy particle reinforced aluminium-based compound
Material.Stretch test result shows that the tensile strength of composite is 293MPa, and elongation percentage is 11.5%.
Al0.25CoCrCu0.25FeNiTi0.25The metallographic structure of high-entropy alloy particle enhanced aluminum-based composite material is (with Fig. 3 phases
Like) display, particle is uniformly dispersed in the base, and clean interfaces are smooth.
Embodiment 4
Step one：Prepare high-entropy alloy powder
First, AlCoCrCuFeNi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
Al0.5CoCrCuFeNi, according to high-entropy alloy Al0.5The mole atom ratio and mass fraction of each essential element in CoCrCuFeNi,
The quality for calculating each composition respectively is pure Al powder 27.69g, pure Co powder 120.95g, pure Cr powder 106.72g, pure Cu powder
134.54g, pure Fe powder 114.63g, pure Ni powder 120.46g, and respective quality is weighed with electronic balance, it is mixed on mixed powder machine
Powder 15h, puts into stainless steel jar mill after being well mixed, vacuumizes, applying argon gas, then the ball milling 42h on planetary ball mill, ball
Material is than being 8：1, rotating speed is 300r/min, and process control agent is absolute ethyl alcohol, prepares high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 125 μ
M high-entropy alloy particle；125 μm of high-entropy alloy particle is fitted into a diameter of 20mm 4043 aluminium-alloy pipes, at normal temperatures
It is compacted and segment encapsulation.
Step 3：Stirring casting technique prepares composite
Al0.5The volume fraction of CoCrCuFeNi high-entropy alloys is 20%；Alloy matrix aluminum is 4043Al, and volume fraction is
80%；The quality for calculating 4043 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 984.89g, and is weighed with electronic balance.Will
Punching block and it is packaged with 4043 aluminium-alloy pipes of high-entropy alloy particle and is incubated 2h at 250 DEG C, by 2Kg 4043Al bar in 750 DEG C
30min is incubated after fusing, in the aluminium liquid that 4043 aluminium-alloy pipes of segment encapsulation are added to melting, refining, slagging-off, degasification, with
Cast molding, the demoulding after 250r/min mixing speed stirring 15min, obtain high-entropy alloy particle enhanced aluminum-based composite material.
Stretch test result shows that the tensile strength of composite is 319MPa, and elongation percentage is 9.8%.Observe Al0.5CoCrCuFeNi
The metallographic structure (similar to Fig. 3) of high-entropy alloy particle enhanced aluminum-based composite material, particle is uniformly distributed in the base, not bright
Aobvious reaction transition zone, particle is good with matrix chemical compatibility.
Embodiment 5
Step one：Prepare high-entropy alloy powder
First, AlCoCrFeNiTi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
AlCoCrFeNiTi0.5, according to high-entropy alloy AlCoCrFeNiTi0.5In each essential element mole atom ratio and mass fraction,
The quality of each composition is calculated respectively for pure Al powder 24.40g, pure Co powder 53.30g, pure Cr powder 47.03g, pure Fe powder 50.52g,
Pure Ni powder 53.09g, pure Ti powder 21.65g, and respective quality is weighed with electronic balance, it is mixed to powder 10h, mixing on mixed powder machine
Put into stainless steel jar mill, vacuumize, applying argon gas after uniform, then the ball milling 32h on planetary ball mill, ratio of grinding media to material is 8：1,
Rotating speed is 400r/min, and process control agent is absolute ethyl alcohol, prepares high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 250 μ
M high-entropy alloy particle；250 μm of high-entropy alloy particle is fitted into a diameter of 30mm ZL102 aluminium-alloy pipes, at normal temperatures
It is compacted and segment encapsulation.
Step 3：Stirring casting technique prepares composite
AlCoCrFeNiTi0.5The volume fraction of high-entropy alloy is 25%；Alloy matrix aluminum is ZL102, and volume fraction is
75%；The quality for calculating the ZL102 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 925.68g, and is weighed with electronic balance.Will
Punching block and it is packaged with the ZL102 aluminium-alloy pipes of high-entropy alloy particle and is incubated 1h at 300 DEG C, by 2Kg ZL102 ingot casting in 740 DEG C
35min is incubated after fusing, in the aluminium liquid that the ZL102 aluminium-alloy pipes of segment encapsulation are added to melting, refining, slagging-off, degasification, with
Cast molding, the demoulding after 400r/min mixing speed stirring 10min, obtain high-entropy alloy particle enhanced aluminum-based composite material.
Stretch test result shows that the tensile strength of composite is 328MPa, and elongation percentage is 9.1%.AlCoCrFeNiTi0.5High entropy
The metallographic structure (similar to Fig. 3) of alloying pellet reinforced aluminum matrix composites shows, particle uniform, Dispersed precipitate in the base,
And clean interfaces are smooth.
Embodiment 6
Step one：Prepare high-entropy alloy powder
First, AlCoCuFeNi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
Al0.5CoCu0.5FeNi, according to high-entropy alloy Al0.5CoCu0.5The mole atom ratio and mass fraction of each essential element in FeNi,
The quality of each composition is calculated respectively for pure Al powder 15.35g, pure Co powder 67.05g, pure Cu powder 37.29g, pure Fe powder 63.54g,
Pure Ni powder 66.77g, and respective quality is weighed with electronic balance, it is mixed into powder 6h on mixed powder machine, put into after being well mixed stainless
In steel ball grinding jar, vacuumize, applying argon gas, the subsequent ball milling 18h on planetary ball mill, ratio of grinding media to material is 8：1, rotating speed is 500r/
Min, process control agent is absolute ethyl alcohol, prepares high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 350 μ
M high-entropy alloy particle；350 μm of high-entropy alloy particle is fitted into a diameter of 40mm ZL301 aluminium-alloy pipes, at normal temperatures
It is compacted and segment encapsulation.
Step 3：Stirring casting technique prepares composite
Al0.5CoCu0.5The volume fraction of FeNi high-entropy alloys is 30%；Alloy matrix aluminum is ZL301, and volume fraction is
70%；The quality for calculating the ZL301 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 1137.06g, and is weighed with electronic balance.
By punching block and the aluminium-alloy pipe for being packaged with high-entropy alloy particle in 200 DEG C of insulation 2h, by 2Kg ZL301 ingot castings in 760 DEG C of fusings
After be incubated 40min, will segment encapsulation ZL301 aluminium-alloy pipes add melting aluminium liquid in, refining, slagging-off, degasification, with 500r/
Cast molding, the demoulding after min mixing speed stirring 10min, obtain high-entropy alloy particle enhanced aluminum-based composite material.Stretching examination
Test result to show, the tensile strength of composite is 339MPa, and elongation percentage is 8.7%.Observe Al0.5CoCu0.5The high entropys of FeNi are closed
The metallographic structure display (similar to Fig. 3) of gold grain reinforced aluminum matrix composites, particle is distributed than more uniform, not had in the base
Obviously casting flaw.
Embodiment 7
Step one：Prepare high-entropy alloy powder
First, AlCoCrFeNiTi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
Al0.2CoCrFeNiTi0.5, according to high-entropy alloy Al0.2CoCrFeNiTi0.5In each essential element mole atom ratio and quality point
Number, the quality that each composition is calculated respectively is pure Al powder 12.83g, pure Co powder 56.04g, pure Cr powder 49.45g, pure Fe powder
53.11g, pure Ni powder 55.81g, pure Ti powder 22.77g simultaneously weighs respective quality with electronic balance, and it is mixed into powder on mixed powder machine
16h, puts into stainless steel jar mill after being well mixed, vacuumizes, applying argon gas, then the ball milling 6h on planetary ball mill, ball material
Than for 8：1, rotating speed is 600r/min, and process control agent is absolute ethyl alcohol, prepares high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 500 μ
M high-entropy alloy particle；500 μm of high-entropy alloy particle is fitted into a diameter of 50mm ZL201 aluminium-alloy pipes, at normal temperatures
It is compacted and segment encapsulation.
Step 3：Stirring casting technique prepares composite
Al0.2CoCrFeNiTi0.5The volume fraction of high-entropy alloy is 35%；Alloy matrix aluminum is ZL201, and volume fraction is
65%；The quality for calculating the ZL201 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 1188.41g, and is weighed with electronic balance.
By punching block and the ZL201 aluminium-alloy pipes for being packaged with high-entropy alloy particle in 300 DEG C of insulation 2h, by 2Kg ZL201 ingot castings in 780
DEG C fusing after be incubated 30min, will segment encapsulation ZL201 aluminium-alloy pipes add melting aluminium liquid in, refining, slagging-off, degasification, with
Cast molding, the demoulding after 150r/min mixing speed stirring 35min, obtain high-entropy alloy particle enhanced aluminum-based composite material.
Stretch test result shows that the tensile strength of composite is 346MPa, and elongation percentage is 8.3%.Observation
Al0.2CoCrFeNiTi0.5The metallographic structure (similar to Fig. 3) of high-entropy alloy particle enhanced aluminum-based composite material, particle is in matrix
Middle energy more uniform distribution, and combined preferably with matrix, without obvious conversion zone.
Embodiment 8
Step one：Prepare high-entropy alloy powder
First, AlCoCuFeNi systems high-entropy alloy particle is mutually selected in enhancing, and the specific composition of high-entropy alloy is
Al0.75CoCu0.25FeNi, according to high-entropy alloy Al0.75CoCu0.25The mole atom ratio and quality of each essential element point in FeNi
Number, the quality that each composition is calculated respectively is pure Al powder 60.34g, pure Co powder 175.73g, pure Cu powder 47.38g, pure Fe powder
166.54g, pure Ni powder 174.71g, and respective quality is weighed with electronic balance, it is mixed into powder 12h on mixed powder machine, is well mixed
Put into stainless steel jar mill, vacuumize, applying argon gas afterwards, then the ball milling 48h on planetary ball mill, ratio of grinding media to material is 8：1, rotating speed
For 250r/min, process control agent is absolute ethyl alcohol, prepares high-entropy alloy powder.
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved with the sieve of standard mesh number, obtains average grain diameter for 150 μ
M high-entropy alloy particle；150 μm of high-entropy alloy particle is fitted into a diameter of 12mm 5005 aluminium-alloy pipes, at normal temperatures
It is compacted and segment encapsulation.
Step 3：Stirring casting technique prepares composite
Al0.75CoCu0.25The volume fraction of FeNi high-entropy alloys is 0.1%；Alloy matrix aluminum is 5005Al, volume fraction
For 99.9%；The quality for calculating 5005 aluminium-alloy pipes for being packaged with high-entropy alloy particle is 53.76g, and is weighed with electronic balance.
By punching block and 5005 aluminium-alloy pipes for being packaged with high-entropy alloy particle in 280 DEG C of insulation 1h, by 2Kg 5005Al bars in 770
DEG C fusing after be incubated 25min, will segment encapsulation 5005 aluminium-alloy pipes add melting aluminium liquid in, refining, slagging-off, degasification, with
Cast molding, the demoulding after 350r/min mixing speed stirring 30min, obtain high-entropy alloy particle enhanced aluminum-based composite material.
Stretch test result shows that the tensile strength of composite is 168MPa, and elongation percentage is 18%.Observe Al0.75CoCu0.25FeNi
The metallographic structure of high-entropy alloy particle enhanced aluminum-based composite material is (similar to Fig. 3) to be found, particle in the base divide by even dispersion
Cloth, the porosity is low.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (9)
1. a kind of stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material, it is characterised in that including following step
Suddenly：
High-entropy alloy powder is prepared using mechanical alloying and sieved, high-entropy alloy particle is obtained；Using with matrix same material
Aluminium-alloy pipe seals high-entropy alloy particle, and the matrix that will be segmented load weighted aluminium-alloy pipe and be added to melting；Using stirring side
High-entropy alloy particle in formula dispersing matrixes melt；The shaping particle reinforced aluminium-based composite wood of high-entropy alloy is prepared using casting technique
Material；
Specifically include following steps：
Step one：Prepare high-entropy alloy powder
According to the composition of high-entropy alloy, by five kinds or more than five kinds of pure metal powder according to respective different mole atom ratios and matter
Fraction is measured, the quality of each composition in high-entropy alloy is calculated respectively, and weighs respective quality, powder is then mixed, after being well mixed,
Vacuumize and carry out obtaining high-entropy alloy powder after the completion of mechanical alloying, alloying under argon atmosphere；
Step 2：Particle screening and encapsulation
The high-entropy alloy powder that step one is obtained is sieved, and obtains high-entropy alloy particle；By high-entropy alloy particle load with
The aluminium-alloy pipe of matrix same material carries out segmented seal；
Step 3：Stirring casting formed composite material
Punching block and sealed aluminium-alloy pipe are incubated, by matrix melts and are incubated, the aluminium alloy of high-entropy alloy particle will be packaged with
Pipe segmentation is added to after weighing in melting matrix, and refining, degasification, slagging-off stir matrix melt, subsequent cast molding, the demoulding are obtained
Obtain high-entropy alloy particle enhanced aluminum-based composite material.
2. the stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material according to claim 1, it is special
Levy and be：The time of mixed powder described in step one is 6~24h；
The condition of alloying described in step one is that ratio of grinding media to material is 8：1, alloying time is 6~60h；Rotating speed is 150r/min
~600r/min；Process control agent is absolute ethyl alcohol, and temperature is room temperature.
3. the stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material according to claim 1, it is special
Levy and be：The particle diameter distribution of high-entropy alloy particle described in step 2 is 10~500 μm；
A diameter of 5~50mm of aluminium-alloy pipe described in step 2.
4. the stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material according to claim 1, it is special
Levy and be：The condition of insulation described in step 3 is that 1~2h is incubated at 200~300 DEG C；
The condition of matrix melts and insulation described in step 3 is that 20~40min is incubated at 680 DEG C~780 DEG C；
The condition of stirring matrix melt described in step 3 be with 100~500r/min speed stirring aluminium alloy melt 10~
40min。
5. the stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material according to claim 1, it is special
Levy and be：Described high-entropy alloy particle be AlCoCrFeNiTi systems, AlCoCrCuFeNi systems, AlCoCrCuFeNiTi systems,
It is a kind of in AlCoCuFeNi and AlCoCrFeNi systems.
6. the stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material according to claim 1, it is special
Levy and be：Described matrix is aluminium alloy；Described aluminium alloy is wrought aluminium alloy, Al-Li alloys or cast aluminium alloy gold.
7. the stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material according to claim 6, it is special
Levy and be that described wrought aluminium alloy is 1xxx, 2xxx, 4xxx, 5xxx, 6xxx or 7xxx alloy；
Described cast aluminium alloy gold is Al-Si systems, Al-Cu systems, Al-Mg systems, Al-RE systems or Al-Zn systems.
8. the stirring casting preparation technology of high-entropy alloy particle enhanced aluminum-based composite material according to claim 1, it is special
Levy and be：In described high-entropy alloy particle enhanced aluminum-based composite material the volume fraction of high-entropy alloy particle be 0.1%~
35%, the volume fraction of aluminium alloy is 65%~99.9%, and sum of the two is equal to 1.
9. a kind of high-entropy alloy particle enhanced aluminum-based composite material, it is characterised in that by described in any one of claim 1~8
Stirring casting preparation technology is prepared.
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