CN114350998A - High-performance two-phase hybrid reinforced aluminum matrix composite and preparation method thereof - Google Patents
High-performance two-phase hybrid reinforced aluminum matrix composite and preparation method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 114
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 61
- 239000011159 matrix material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 72
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- 229910003407 AlSi10Mg Inorganic materials 0.000 claims abstract description 37
- 239000000919 ceramic Substances 0.000 claims abstract description 29
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 238000002844 melting Methods 0.000 claims abstract description 24
- 230000008018 melting Effects 0.000 claims abstract description 23
- 229910033181 TiB2 Inorganic materials 0.000 claims abstract description 22
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- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000000498 ball milling Methods 0.000 claims description 39
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 12
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- 229910052786 argon Inorganic materials 0.000 claims description 8
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- 230000008901 benefit Effects 0.000 description 4
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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Abstract
The invention discloses a high-performance two-phase hybrid reinforced aluminum matrix composite and a preparation method thereof. The method comprises compounding powderPreparing powder and carrying out selective laser melting forming. The composite powder comprises the following substances in percentage by mass: 96-98% of micron AlSi10Mg alloy powder and nano TiB21-2% of ceramic particles and 1-2% of nano TiC ceramic particles. The two kinds of nano ceramic particles can effectively promote the non-uniform nucleation of a molten pool of the aluminum-based composite material in the selective laser melting and forming process, no obvious hole or crack is observed in the prepared aluminum-based composite material, the crystal grain is obviously refined, the performances such as strength, plasticity, hardness, wear resistance and the like are obviously improved, the comprehensive mechanical property is obviously superior to that of the single particle reinforced AlSi10 Mg-based composite material, the production cost is lower, the production efficiency is higher, and the method has good application prospects in the fields of aerospace and the like.
Description
Technical Field
The invention belongs to the technical field of aluminum-based composite materials and additive manufacturing, and particularly relates to a high-performance two-phase hybrid particle reinforced aluminum-based composite material and a preparation method thereof.
Background
In the fields of automobiles and aerospace, some key structural components need to be supported by materials with excellent comprehensive properties, such as light weight, high strength, high heat conductivity, high wear resistance and the like, but the materials of common steel, titanium and the like have high density and poor heat conductivity, and the light aluminum alloy has insufficient rigidity and wear resistance. The aluminum-based composite material integrates the advantages of aluminum alloy, ceramic and other reinforced phases, has low density, high strength, high plasticity, excellent wear resistance and higher fatigue resistance, and the nano SiC and Al2O3TiN, TiC and TiB2Particles and the like are their widely used reinforcing phases. The selective laser melting technology has the characteristics of high efficiency, low cost, no need of a mold, near-net-shape forming and the like, and is widely used as a preparation method of the aluminum-based composite material, and the aluminum-based composite material prepared by selective laser melting has finer grains and higher mechanical property than the material prepared by the traditional method (such as casting).
The AlSi10Mg alloy has excellent weldability, high specific strength, high thermal conductivity, good corrosion resistance, and the like, and is useful as a base material for aluminum matrix composites. In recent years, many studies on particle-reinforced AlSi10 Mg-based composites have been reported, but most of them are single particle-reinforced AlSi10 Mg-based composites, and these single particle-reinforced AlSi10 Mg-based composites have limited improvement in strength and also tend to cause significant reduction in plasticity or other properties, for example, TiC particle-reinforced AlSi10 Mg-based composites made from ZHOU S Y, which have increased tensile strength from 410MPa to 470MPa but decreased elongation from 8.9% to 4.0% (ZHOU S Y, waz Y, SU Y, et al. effects of Micron/SU ng)bmicron TiC on Additively Manufactured AlSi10Mg:A Comprehensive Study from Computer Simulation to Mechanical and Microstructural Analysis[J]JOM,2020,72(10): 3693-. And the tensile strength of the conventional single particle reinforced AlSi10Mg composite material hardly breaks through 500 MPa. Among them, only the TiB prepared by LI X P et al by selective laser melting2The tensile property of the/AlSi 10Mg composite material is 500MPa and reaches 530MPa (LI X P, JI G, CHEN Z, et al2 decorated AlSi10Mg alloy with high fracture strength and ductility[J]Acta Materialia,2017,129: 183-. 193.). However, the process is complicated and the nano TiB2The addition amount of (A) is 11 wt.%, the cost is high, and mass production and industrial application are difficult to realize.
In AlSi10 Mg-based composites, nano TiB2And granular TiC particles are the best reinforcing phase. TiB2The particles can be used as heterogeneous nucleating agent, the crystal grains are obviously refined, and the strength and the plasticity of the material are improved. TiB2As a common particle reinforcing phase, the structure is stable when the nano TiB2When the addition amount of the particles is less, the improvement of the mechanical property is limited, but when the addition amount is excessive, the nano TiB2Serious agglomeration can occur, and the comprehensive mechanical property of the material is reduced. TiC and Al have the same face-centered cubic structure, have higher crystal structure matching degree with an Al matrix, are heterogeneous nucleating agents and can also be used as particle reinforcing phases. However, TiC is unstable in structure due to its non-stoichiometric characteristics, and is liable to interface reaction with Al to form Al4C3The brittle phase, too much, also deteriorates the overall mechanical properties of the material, so too much addition is not desirable.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a high-performance aluminum matrix composite material which can realize good economic benefit and can be applied industrially.
The high-performance two-phase hybrid reinforced aluminum-based composite material comprises the following raw material composite powder in percentage by mass: 96-98% of micron AlSi10Mg alloy powder and nano TiB21-2% of ceramic particles and 1-2% of nano TiC ceramic particles.
Further preferably, the high-performance two-phase hybrid reinforced aluminum matrix composite comprises the following substances in percentage by mass: 97% of micron AlSi10Mg alloy powder and nano TiB21.5 percent of ceramic particles and 1.5 percent of nano TiC ceramic particles.
Preferably, the micron AlSi10Mg alloy powder is spherical particles, and the average particle size of the AlSi10Mg alloy powder is 33.9 μm.
Preferably, the nano TiB2The ceramic particles are irregular in shape, have a particle size in the range of 20-200nm, and have a particle size distribution that generally follows a log-normal distribution.
Preferably, the nano TiC ceramic particles are irregular in shape, the particle size ranges from 20 nm to 200nm, and the particle size distribution of the particles approximately follows log-normal distribution.
Preferably, the high-performance two-phase hybrid reinforced aluminum matrix composite is characterized in that the preparation of the aluminum matrix composite comprises the following steps:
(1) weighing the three kinds of powder in a vacuum glove box according to the weight ratio, placing the powder in a ball milling tank, and filling argon gas into the ball milling tank to be used as protective gas; then, low-energy ball milling treatment is carried out under argon atmosphere to ensure that the nano TiB2The particles and TiC particles are uniformly embedded on the surface of the AlSi10Mg alloy powder, and good powder sphericity is kept, so that the composite powder is obtained.
(2) Placing the composite powder prepared by low-energy ball milling in a drying oven, vacuumizing the drying oven, and drying at 70 ℃ for 8 hours to obtain dry composite powder;
(3) and (3) carrying out selective laser melting forming treatment on the composite powder in the step (2), wherein the whole forming process is carried out under the protection atmosphere of argon to prevent oxidation, and the substrate is directly formed according to specific process parameters without preheating to obtain the high-performance two-phase reinforced aluminum-based composite material.
Preferably, the high-performance two-phase hybrid reinforced aluminum matrix composite is characterized in that the ball-to-feed ratio in the step (1) is 5: 1, the ball milling speed is 135r/min, the ball milling time is 4h, and the rest is stopped for 5min every 30min of ball milling.
Preferably, the high-performance two-phase hybrid reinforced aluminum matrix composite is characterized in that, in the step (2), the laser power is 240-. Preferably, the laser power is 270W, the scanning speed is 1600mm/s, the scanning interval is 110 μm, and the scanning strategy is that the scanning directions of two adjacent layers are 67 degrees.
The invention has the beneficial effects that:
1. the aluminum matrix composite material prepared by the method has the advantages of uniform tissue, high density, excellent comprehensive performance and high practical value. The grain refinement is obvious, the strength, the plasticity, the hardness, the wear resistance and other properties are obviously improved, and the comprehensive performance is obviously superior to that of the prior single-particle reinforced AlSi10 Mg-based composite material, such as TiB2The composite material comprises a/AlSi 10Mg composite material, a TiC/AlSi10Mg composite material, a SiC/AlSi10Mg composite material and the like, so the two-phase hybrid reinforced aluminum-based composite material prepared by the method has good application prospects in the fields of aerospace and the like.
2. The reinforcing phase TiB of the high-performance two-phase hybrid reinforced aluminum matrix composite material prepared by the invention2And TiC is less in total amount, and the process is simple, so that the preparation cost is reduced, the economic benefit is good, and the industrial application of the two-phase hybrid reinforced high-performance aluminum matrix composite material is more favorably realized.
3. Nano TiB2And the laser reflectivity of the nano TiC ceramic particles is low, and the nano ceramic particles embedded on the surface of the AlSi10Mg powder increase the reflection times of laser, so that the added nano TiB2And the nano TiC ceramic particles can reduce the laser reflectivity of the composite powder and improve the laser absorptivity, so that the SLM forming performance of the obtained aluminum-based composite powder is better, higher laser scanning speed can be adopted without generating processing defects, the production efficiency is improved, and the industrial production of the high-performance two-phase hybrid reinforced aluminum-based composite material is facilitated.
4. When nano TiB2Less particle additionIn the case of the titanium alloy, the improvement of mechanical properties is limited, but when the amount of the titanium alloy is too large, the titanium alloy is nano-TiB2Serious agglomeration can occur, and the comprehensive mechanical property of the material is reduced. Because of the non-stoichiometric characteristics of TiC, the structure of TiC is unstable and easy to react with aluminum to form Al4C3The brittle phase, too much, also deteriorates the overall mechanical properties of the material, so too much addition is not desirable. Therefore, the two nano reinforced ceramic particles can mutually make up the defects of each other and play a role in synergistic reinforcement. Can better exert TiB2And TiC, thereby obviously improving the strength and the plasticity of the aluminum matrix composite material.
Drawings
FIG. 1 is an electron micrograph of an aluminum-based composite powder prepared in example 3;
FIG. 2 is a stress-strain plot of the dual-phase hybrid-reinforced high performance aluminum matrix composite prepared in example 3.
Detailed description of the invention
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto, and may be carried out with reference to conventional techniques for process parameters not particularly noted.
Example 1
The preparation method of the high-performance two-phase hybrid reinforced aluminum matrix composite comprises two steps of preparation of composite powder and selective laser melting and forming:
(1) preparation of composite powder: vacuumizing a vacuum glove box, filling argon to ensure that the air pressure of the glove box is consistent with the atmospheric pressure, and weighing 98 wt.% of AlSi10Mg alloy powder and 1 wt.% of TiB in the glove box2Ceramic particles and 1 wt.% of nano TiC ceramic particles, placing the mixed powder into a ball milling tank, and adding stainless steel balls, wherein the ball-material ratio in the ball milling process is 5: and 1, performing intermittent ball milling on the composite powder. The ball milling speed is 135r/min, the ball milling time is 4h, and finally the aluminum-based composite powder is obtained.
(2) Selective laser melting and forming: and (3) drying the aluminum-based composite powder obtained in the step (1) and carrying out selective laser melting and forming. Setting the laser power to be 270W, the scanning speed to be 1600mm/s, the scanning interval to be 110 mu m, the layer thickness to be 30 mu m, and the substrate not to be preheated, wherein the scanning strategy is that the scanning directions of two adjacent layers are 67 degrees, and finally obtaining the high-performance two-phase hybrid reinforced aluminum matrix composite.
In this example, (TiB) was prepared2The density of the + TiC)/AlSi10Mg composite material reaches 98%, the tensile strength reaches 480MPa through tensile test, and the elongation reaches 9.5%.
Example 2
The preparation method of the high-performance two-phase hybrid reinforced aluminum matrix composite comprises two steps of preparation of composite powder and selective laser melting and forming:
(1) preparation of composite powder: vacuumizing a vacuum glove box, filling argon to ensure that the air pressure of the glove box is consistent with the atmospheric pressure, and weighing 96 wt.% of AlSi10Mg alloy powder and 2 wt.% of TiB in the glove box2Ceramic particles and 2 wt.% of nano TiC ceramic particles, placing the mixed powder into a ball milling tank, and adding stainless steel balls, wherein the ball-material ratio in the ball milling process is 5: and 1, performing intermittent ball milling on the composite powder. The ball milling speed is 135r/min, the ball milling time is 4h, and finally the aluminum-based composite powder is obtained.
(2) Selective laser melting and forming: and (3) drying the aluminum-based composite powder obtained in the step (1) and carrying out selective laser melting and forming. Setting the laser power to be 270W, the scanning speed to be 1600mm/s, the scanning interval to be 110 mu m, the layer thickness to be 30 mu m, and the substrate not to be preheated, wherein the scanning strategy is that the scanning directions of two adjacent layers are 67 degrees, and finally obtaining the high-performance two-phase hybrid reinforced aluminum matrix composite.
In this example, (TiB) was prepared2The density of the + TiC)/AlSi10Mg composite material reaches 98%, the tensile strength reaches 523MPa through tensile test, and the elongation reaches 6.5%.
Example 3
The preparation method of the high-performance two-phase hybrid reinforced aluminum matrix composite comprises two steps of preparation of composite powder and selective laser melting and forming:
(1) preparation of composite powder: vacuumizing the vacuum glove box, and filling argonGas was allowed to make the glove box pressure uniform to atmospheric pressure, and 97 wt.% of AlSi10Mg alloy powder and 1.5 wt.% of TiB were weighed in the glove box2Ceramic particles and 1.5 wt.% of nano TiC ceramic particles, placing the mixed powder into a ball milling tank, and adding stainless steel balls, wherein the ball-material ratio in the ball milling process is 5: and 1, performing intermittent ball milling on the composite powder. The ball milling speed is 135r/min, the ball milling time is 4h, and finally the aluminum-based composite powder is obtained. From the first drawing, it can be seen that the sphericity of the obtained composite powder is good, and therefore the composite powder has better fluidity and formability.
(2) Selective laser melting and forming: and (3) drying the aluminum-based composite powder obtained in the step (1) and carrying out selective laser melting and forming. Setting the laser power to be 270W, the scanning speed to be 1600mm/s, the scanning interval to be 110 mu m, the layer thickness to be 30 mu m, and the substrate not to be preheated, wherein the scanning strategy is that the scanning directions of two adjacent layers are 67 degrees, and finally obtaining the high-performance two-phase hybrid reinforced aluminum matrix composite.
In this example, (TiB) was prepared2The density of the + TiC)/AlSi10Mg composite material reaches 99%, the tensile strength reaches 567MPa, the elongation reaches 11.6% and the stress-strain curve is shown in figure 2. The grains of the material are all fine isometric crystals and the average grain size is only 1.2 mu m. The friction and wear performance of the material is remarkably improved through testing.
Comparative example 1
This comparative example relates to an unreinforced AlSi10Mg alloy prepared in substantially the same manner as in example 3, except that no nano-reinforcing particles were added, no composite powder preparation step was required, and only a laser selective melt-forming step was included:
the AlSi10Mg powder was dried and subjected to laser selective melt forming. Setting the laser power to be 270W, the scanning speed to be 1600mm/s, the scanning interval to be 110 mu m, the layer thickness to be 30 mu m, and the substrate does not need to be preheated, wherein the scanning strategy is that the scanning directions of two adjacent layers form 67 degrees, and finally obtaining the unreinforced AlSi10Mg alloy.
In this example, the compactness of the obtained AlSi10Mg alloy is 98.2%, the tensile strength is 394MPa and the elongation is 4.5% as measured by a tensile test, and the crystal grains of the material are coarse columnar crystals and the average crystal grain size is 12.1 μm, which shows that the tensile property and SLM processability of the unreinforced AlSi10Mg alloy prepared by the same method are far inferior to those of the dual-phase hybrid reinforced AlSi10 Mg-based composite material, and the frictional wear property is also inferior to that of the dual-phase hybrid reinforced aluminum-based composite material described in example 3.
Comparative example 2
This comparative example relates to a single-particle-reinforced AlSi10 Mg-based composite material prepared in substantially the same manner as in example 3, except that only one type of TiC nano-reinforcing particles were added, and the total amount of ceramic particles added was the same as in example 3, comprising the steps of preparing a composite powder and selective laser melting and forming:
(1) preparation of composite powder: vacuumizing a vacuum glove box, filling argon to enable the air pressure of the glove box to be consistent with the atmospheric pressure, weighing 97 wt.% of AlSi10Mg alloy powder and 3 wt.% of nano TiC ceramic particles in the glove box, placing the mixed powder in a ball milling tank, and adding stainless steel balls, wherein the ball-material ratio in the ball milling process is 5: and 1, performing intermittent ball milling on the composite powder. The ball milling speed is 135r/min, the ball milling time is 4h, and finally the aluminum-based composite powder is obtained.
(2) Selective laser melting and forming: and (3) drying the aluminum-based composite powder obtained in the step (1) and carrying out selective laser melting and forming. Setting the laser power to be 270W, the scanning speed to be 1600mm/s, the scanning interval to be 110 mu m, the layer thickness to be 30 mu m, the substrate does not need to be preheated, and the scanning strategy is that the scanning directions of two adjacent layers are 67 degrees, and finally obtaining the single-particle reinforced aluminum matrix composite.
In the embodiment, the density of the prepared TiC/AlSi10Mg composite material is 98.2%, the tensile strength is 453MPa and the elongation is 4.8% through a tensile experiment, and all crystal grains of the material are fine isometric crystals and the average crystal grain size is 1.5 microns through a test. Compared with the unreinforced AlSi10Mg alloy in the comparative example 1, the TiC single-particle reinforced AlSi10Mg composite material has obviously refined grains, and the tensile property and the frictional wear property are improved, but the effect is not as good as that of the dual-phase hybrid reinforced aluminum-based composite material in the example 3.
Comparative example 3
This comparative example relates to a single particle reinforced AlSi10 Mg-based composite material prepared in substantially the same manner as in example 3, except that only TiB was added2A nano-reinforcing particle, the total amount of added ceramic particles is the same as that in example 3, and the nano-reinforcing particle comprises two steps of preparation of composite powder and selective laser melting and forming:
(1) preparation of composite powder: vacuumizing a vacuum glove box, filling argon to ensure that the air pressure of the glove box is consistent with the atmospheric pressure, and weighing 97 wt.% of AlSi10Mg alloy powder and 3 wt.% of nano TiB in the glove box2Ceramic particles, placing the mixed powder into a ball milling tank, and adding stainless steel balls, wherein the ball-material ratio in the ball milling process is 5: and 1, performing intermittent ball milling on the composite powder. The ball milling speed is 135r/min, the ball milling time is 4h, and finally the aluminum-based composite powder is obtained.
(2) Selective laser melting and forming: and (3) drying the aluminum-based composite powder obtained in the step (1) and carrying out selective laser melting and forming. Setting the laser power to be 270W, the scanning speed to be 1600mm/s, the scanning interval to be 110 mu m, the layer thickness to be 30 mu m, the substrate does not need to be preheated, and the scanning strategy is that the scanning directions of two adjacent layers are 67 degrees, and finally obtaining the single-particle reinforced aluminum matrix composite.
In this example, TiB was prepared2The density of the/AlSi 10Mg composite material is 97.1%, the tensile strength is 361MPa through tensile test, the elongation is 3.8%, and the material is tested to have coarse columnar grains and the average grain size is 7.7 microns. TiB compared to the unreinforced AlSi10Mg alloy of comparative example 12The single particle reinforced AlSi10Mg composite material has slightly refined grains, improved friction and wear performance, but rather reduced tensile performance, and the comprehensive performance is far inferior to that of the double-phase hybrid reinforced aluminum-based composite material described in example 3.
The above description is only for the preferred embodiment of the present invention, and the technical solution of the present invention is not limited thereto, and any known modifications made by those skilled in the art based on the main technical idea of the present invention belong to the technical scope of the present invention, and the specific protection scope of the present invention is subject to the description of the claims.
Claims (10)
1. A high-performance two-phase hybrid reinforced aluminum matrix composite is characterized in that: the material comprises the following substances in percentage by mass: 96-98% of micron AlSi10Mg alloy powder and nano TiB21-2% of ceramic particles and 1-2% of nano TiC ceramic particles.
2. The high performance dual phase hybrid reinforced aluminum matrix composite as claimed in claim 1, wherein: the composite powder comprises the following substances in percentage by mass: 97% of micron AlSi10Mg alloy powder and nano TiB21.5 percent of ceramic particles and 1.5 percent of nano TiC ceramic particles.
3. The high performance dual phase hybrid reinforced aluminum matrix composite as claimed in claim 1, wherein: the micron AlSi10Mg alloy powder is spherical particles.
4. The high performance dual phase hybrid reinforced aluminum matrix composite as claimed in claim 1, wherein: the AlSi10Mg alloy powder has an average particle size of 33.9 μm, a particle size range of 5-100 μm, and an AlSi10Mg powder particle size distribution that approximately follows a log-normal distribution.
5. The high performance dual phase hybrid reinforced aluminum matrix composite as claimed in claim 1, wherein: the nano TiB2The average particle size of the ceramic particles is 60nm, the particle size range is 20-200nm, and the particle size distribution of the particles approximately follows a log-normal distribution.
6. The high performance dual phase hybrid reinforced aluminum matrix composite as claimed in claim 1, wherein: the average grain diameter of the nano TiC ceramic grains is 60nm, the grain diameter range is 20-200nm, and the grain diameter distribution of the grains approximately follows the log-normal distribution.
7. The method for preparing a high-performance two-phase hybrid reinforced aluminum matrix composite material as claimed in any one of claims 1 to 6, wherein the method comprises the following steps: the method comprises the following steps:
(1) preparation of composite powder: weighing the three kinds of powder in a vacuum glove box according to the weight ratio, placing the powder in a ball milling tank, and filling argon gas into the ball milling tank to be used as protective gas; then ball milling treatment is carried out under argon atmosphere to lead the nano TiB2Particles and nano TiC particles are uniformly embedded on the surface of the AlSi10Mg alloy powder, and good powder sphericity is kept to obtain composite powder;
(2) drying treatment of powder: placing the composite powder prepared by low-energy ball milling in a drying oven, vacuumizing the drying oven, and drying at 70 ℃ for 8 hours to obtain dry composite powder;
(3) selective laser melting and forming: and (3) carrying out selective laser melting forming treatment on the composite powder in the step (2), wherein the whole forming process is carried out under the protection atmosphere of argon to prevent oxidation, and the substrate is directly formed according to specific process parameters without preheating to obtain the high-performance two-phase reinforced aluminum-based composite material.
8. The high-performance two-phase hybrid reinforced aluminum-based composite material according to claim 6, wherein in the step (1), the ball-to-material ratio is 5: 1, the ball milling speed is 135r/min, the ball milling time is 4h, and the rest is stopped for 5min every 30min of ball milling.
9. The aluminum-based composite material with high performance and dual-phase hybrid enhancement as claimed in claim 6, wherein in step (2), the laser power for selective laser melting and forming is 240-300W, the scanning speed is 1400-1800mm/s, the scanning distance is 105-115 μm, the thickness of the powder layer is 30 μm, and the scanning strategy is that the scanning directions of two adjacent layers form an angle of 67 °.
10. The high-performance two-phase hybrid reinforced aluminum-based composite material according to claim 6, wherein in the step (2), the laser power is 270W, the scanning speed is 1600mm/s, the scanning distance is 110 μm, the powder layer thickness is 30 μm, and the scanning strategy is that the scanning directions of two adjacent layers form an angle of 67 degrees.
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