CN113755712A - Macro-particle reinforced aluminum-based composite material billet and powder metallurgy-based preparation method thereof - Google Patents
Macro-particle reinforced aluminum-based composite material billet and powder metallurgy-based preparation method thereof Download PDFInfo
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- CN113755712A CN113755712A CN202111049459.7A CN202111049459A CN113755712A CN 113755712 A CN113755712 A CN 113755712A CN 202111049459 A CN202111049459 A CN 202111049459A CN 113755712 A CN113755712 A CN 113755712A
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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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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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
Abstract
The invention relates to a macro-quantization particle reinforced aluminum matrix composite material billet and a preparation method thereof based on powder metallurgy. The method comprises the following steps: (1) mixing ceramic powder with aluminum matrix powder and cold-pressing to obtain mixed powder; (2) heating and pressurizing the mixed powder under a vacuum condition for compounding to obtain a billet intermediate; (3) and cooling the billet intermediate to obtain the macro-quantization particle reinforced aluminum matrix composite billet. The method for preparing the macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy is prepared by taking ceramic powder and aluminum matrix powder as raw materials and heating and pressurizing the raw materials under a vacuum condition, and the obtained composite material billet has excellent performances in the aspects of three-point bending strength, linear expansion coefficient, elastic modulus, thermal conductivity, compactness and the like.
Description
Technical Field
The invention belongs to the field of aluminum-based composite materials, and particularly relates to a macro-quantization particle reinforced aluminum-based composite material billet and a preparation method thereof based on powder metallurgy.
Background
The developed countries use the particle reinforced aluminum-based composite material for manufacturing parts of spacecraft and weaponry such as rockets, airships, missiles, satellites, advanced military aircraft and combat vehicles, and the parts form military standards. The particle reinforced aluminum matrix composite material has been commercially applied in large scale in the fields of automobiles, electronics, aviation, aerospace, energy sources and the like abroad.
It is stated that for every 1 pound reduction in weight for aerospace launch, the launch cost is reduced by $ 50000, making the composite material potentially of great economic benefit in aerospace weight reduction applications. Although spacecraft are more capable of accepting more expensive materials than military and commercial aircraft applications, cost minimization is also a final goal of space planning. With the deterioration of global ecological environment and the increasing shortage of energy, the light weight of automobiles becomes an urgent need of national energy conservation and emission reduction strategies. The commercial production of metal matrix composites for automobiles has been in history for 25 years, with a 1% reduction in body weight and a 0.88% reduction in fuel consumption (for ordinary vehicles) from a weight reduction perspective. Taking an aluminum matrix composite brake disc as an example, compared with the similar cast iron product, the weight of the aluminum matrix composite brake disc is reduced by 50-60%, and the reduction of the weight has important significance for saving fuel, improving the fuel efficiency and reducing the emission. Compared with the common aluminum alloy piston, the average abrasion loss of the ring groove of the composite material ring-inlaid piston is only 1/7 of the ring groove, the service life of the ring groove reaches thirty thousand kilometers, the service life of the ring groove exceeds that of an automobile, the service life of the ring groove reaches 3-5 times that of the common piston, and the price of the ring groove is only increased by 50%. The main application field of the particle reinforced aluminum-based composite material in the field of thermal control is the manufacturing material of electronic packaging materials and precision instruments, and the functional characteristics of small thermal expansion coefficient, easy matching with the thermal expansion coefficient of a substrate, heat conduction, shock absorption, high modulus and stable size of the composite material are mainly fully utilized. Silicon carbide reinforced aluminum matrix composites provide highly reliable and cost effective thermal management solutions for electronic packaging. It provides high thermal conductivity and tunable low coefficient of thermal expansion. The low density, high strength and hardness of silicon carbide reinforced aluminum matrix composites provide advantages over conventional high density materials for applications requiring weight reduction and resistance to shock and vibration.
At present, China has a great gap in the overall level of the particle reinforced aluminum matrix composite. China has the advantages of equipment and market demand, but the depth of theoretical research on metal composite materials and the aspects of preparation and forming technologies, particularly the preparation aspect of macro-quantized particle reinforced aluminum matrix composite materials, lack systematic and deep basic research and application research. The stability and comprehensive performance of the particle reinforced aluminum matrix composite material in harsh environment have become urgent tasks in the research and development of metal composite materials in China.
Therefore, the technical scheme is provided on the basis of the method.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a macro-quantization particle reinforced aluminum matrix composite material billet and a preparation method thereof based on powder metallurgy. The method for preparing the macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy is prepared by taking ceramic powder and aluminum matrix powder as raw materials and heating and pressurizing the raw materials under a vacuum condition, and the obtained composite material billet has excellent performances in the aspects of three-point bending strength, linear expansion coefficient, elastic modulus, thermal conductivity, compactness and the like.
The scheme of the invention is to provide a method for preparing a macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy, which comprises the following steps:
(1) mixing ceramic powder with aluminum matrix powder and cold-pressing to obtain mixed powder;
(2) heating and pressurizing the mixed powder under a vacuum condition for compounding to obtain a billet intermediate;
(3) and cooling the billet intermediate to obtain the macro-quantization particle reinforced aluminum matrix composite billet.
Specifically, the method comprises the following steps:
(S1) uniformly mixing the ceramic powder and the aluminum matrix powder, then loading the mixture into a metal die provided with a lower backing plate, and then placing the metal die into an upper backing plate for cold pressing; assembling a pressure head and a sealing pipe fitting on a metal die, welding and sealing by adopting electric welding or argon arc welding, and welding an exhaust pipe to form a metal die sleeve;
(S2) heating the metal die sleeve in the vacuum state by using a resistance furnace, and performing hot-pressing compounding on the metal die sleeve after the heat preservation stage is finished;
(S3) cooling the metal die sleeve, and taking out the billet from the die to obtain the billet of the macro-particle reinforced aluminum matrix composite.
Preferably, in step (1), the ceramic powder is SiC, Si, B4C、AlN、TiB2、TiC、Al2O3、Si3N4Carbon nanotubes or graphene, the ceramic powder having an average particle size of less than 100 μm.
Preferably, in step (1), the aluminum matrix powder is Al system, or is one of Al-Mg-Si, Al-Cu-Mg, Al-Zn-Mg, Al-Si, Al-Mg aluminum alloy system, and the average particle size of the aluminum matrix powder is less than 100 μm.
Preferably, in the step (1), the volume content of the ceramic powder is 1 to 70%, and the volume content of the aluminum matrix powder is 99 to 30%.
Preferably, in the step (1), the mixing is mechanical mixing, and the mixing time is 1-24 h.
It is emphasized that, in the specific step (S1) operation, the metal mold shape may be square, circular; the metal die, the upper backing plate, the lower backing plate, the pressure head and the sealing pipe fitting are made of one or more of carbon steel, alloy steel, nickel-based high-temperature alloy and cobalt-based high-temperature alloy; the wall thicknesses of the metal mold, the upper cushion plate and the lower cushion plate are more than 10 mm; the size of the upper and lower backing plates is less than the inner cavity of the metal mold by within 0.5 mm; the height of the pressure head is greater than the reduction of the billet, and the size of the pressure head is smaller than the inner wall of the metal mold by more than 1 mm; the sealing element can be a thin-wall steel sleeve or a corrugated steel sleeve, the thickness of the steel sleeve is more than 1mm, and the height of the steel sleeve is more than or equal to the height of the pressure head; in addition, the die can be independently assembled with the upper pressure head, and can also be simultaneously assembled with the upper pressure head and the lower pressure head.
Preferably, in the step (2), the vacuum degree under the vacuum condition is less than 50 Pa. It is emphasized that, in the specific step (S2), after the vacuum state of the metal mold sleeve is vacuumized by the air exhaust tube, the air exhaust tube is clamped and sealed, and the vacuum degree in the metal mold is less than 10 Pa; the vacuum state metal die sleeve can also adopt a mode that an exhaust pipe extends out of the resistance furnace body, a vacuum unit is adopted for continuously vacuumizing, the vacuum state of the die is kept, and the vacuum degree in the die is smaller than 50 Pa.
Preferably, in step (2), the heating is performed by: heating to 500-800 ℃ at a heating rate of 1-10 ℃/min, and preserving heat for 1-10 h. In the specific step (S2) operation, the resistance furnace may be a general electric furnace or an isothermal die forging electric furnace.
Preferably, in the step (2), the pressure of the pressurization is more than or equal to 10MPa, and the time of the pressurization is more than or equal to 60 s.
And the weight of the finally obtained macro-quantization particle reinforced aluminum matrix composite billet is 200-10000 kg.
Based on the same technical concept, the invention also provides the macro-quantization particle reinforced aluminum matrix composite material prepared by any one of the methods.
The invention has the beneficial effects that:
the method for preparing the macro-quantitative particle reinforced aluminum matrix composite billet based on powder metallurgy is prepared by taking ceramic powder and aluminum matrix powder as raw materials and heating and pressurizing the raw materials under a vacuum condition, and the obtained composite billet has excellent performances in three-point bending strength, linear expansion coefficient, elastic modulus, thermal conductivity, compactness and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The embodiment provides a method for preparing a macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy, which comprises the following steps:
(1) SiC particles with the average particle size of 10 mu m and Al powder (model 6061) with the average particle size of 30 mu m are adopted, and the SiC/6061Al powder and steel balls are loaded into a material mixing tank according to the proportion of 45 vol.% SiC/6061Al for mechanical mixing, the mass ratio of the balls to the materials is 1:1, and the mechanical mixing is carried out for 8 hours. And then placing a No. 45 steel die on a hydraulic press platform, wherein the inner diameter of the die is 800mm, the height of the die is 1200mm, the wall thickness of the die is 30mm, placing a 30mm steel pad at the bottom of the steel die, mixing, then loading 1000kg of powder into the die, placing a 30mm upper steel pad into the die for cold pressing, and carrying out cold pressing on the upper steel pad, wherein the density of the cold pressing is 80%. Welding an upper pressure head and a lower pressure head together with a steel gasket, wherein the upper pressure head and the lower pressure head have the diameter of 800mm and the height of 200mm, then welding and sealing by using a thin-wall steel sheath, the inner diameter of the sheath is 800mm, the height of 200mm and the thickness of 5mm, and welding a 201L stainless steel pipe exhaust tube on the sheath, the inner diameter of the exhaust tube is 8mm, and the wall thickness of the exhaust tube is 2 mm.
(2) And (5) adopting a vacuum unit to extract air, and welding and sealing the extraction pipe after the vacuum degree is less than 0.001 pa. Putting the mould into a resistance furnace, heating up to 610 ℃ at the heating rate of 5 ℃/min, and preserving heat for 5 h. And taking the die out of the resistance furnace, placing the die on a hydraulic press working platform, and performing hot-pressing compounding under the pressure of 60MPa for 20 min.
(3) And (3) after pressure maintaining, placing the die in a 500 ℃ resistance furnace, preserving heat for 1h, cooling to room temperature along with the furnace, and processing and removing the die to obtain a compact billet with the diameter of 800mm and the height of 600 mm.
Example 2
The embodiment provides a method for preparing a macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy, which comprises the following steps:
(1) SiC particles with the average particle size of 20 mu m and Al powder (model number of 6092) with the average particle size of 30 mu m are adopted, and the SiC/6092Al powder and steel balls are loaded into a material mixing tank according to the proportion of 55 vol.% SiC/6092Al for mechanical mixing, wherein the ball-material mass ratio is 1:2, and the mechanical mixing is carried out for 2 hours. And then placing a No. 20 steel die on a hydraulic press platform, wherein the inner diameter of the die is 1200mm, the height of the die is 800mm, the wall thickness of the die is 30mm, placing a 50mm steel pad at the bottom of the steel die, adding 1500kg of mixed powder into the die, placing a 50mm upper steel pad into the die for cold pressing, and keeping the cold pressing density at 75%. Welding an upper pressure head and a lower pressure head together with a steel gasket, wherein the diameter of the upper pressure head and the lower pressure head is 1200mm, the height of the upper pressure head and the lower pressure head is 150mm, then welding and sealing the upper pressure head and the lower pressure head by using a corrugated pipe steel sheath, the inner diameter of the corrugated pipe is 1200mm, the height of the corrugated pipe is 200mm, the thickness of the corrugated pipe is 2.5mm, and a 316L stainless steel pipe exhaust tube is welded on the sheath, the inner diameter of the exhaust tube is 12mm, and the wall thickness of the exhaust tube is 3 mm.
(2) The mould is placed into a mould forging furnace assembled on a press platform, an exhaust pipe is connected with a vacuum unit outside the furnace, the heating rate is 3 ℃/min, the temperature is raised to 615 ℃, and the temperature is kept for 6 h. And after the vacuum degree is less than 0.01pa, performing hot-pressing compounding by adopting the pressure of 70MPa, and keeping the pressure for 30 min.
(3) And then cooling the die to room temperature along with the furnace, and removing the die to obtain a compact billet with the diameter of 1200mm and the height of 400 mm.
Example 3
The embodiment provides a method for preparing a macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy, which comprises the following steps:
(1) SiC particles with the average particle size of 3.5 mu m and 2009Al (Al-4.5Cu-1.2Mg) powder with the average particle size of 20 mu m are mixed with steel balls in a mixing tank according to the proportion of 17 vol.% SiC/2009Al, and the mixture is mechanically mixed for 4 hours, wherein the mass ratio of ball materials is 1: 1. And then placing a No. 45 steel die on a hydraulic press platform, wherein the inner diameter of the die is 1500mm, the height of the die is 1000mm, and the wall thickness of the die is 40mm, placing a 30mm steel pad at the bottom of the steel die, mixing, adding 3000kg of powder into the die, placing a 30mm upper steel pad into the die, and carrying out cold pressing, wherein the density of the cold pressing is 85%. Welding an upper pressure head and a lower pressure head together with a steel gasket, wherein the diameter of the upper pressure head and the lower pressure head is 1500mm, the height of the upper pressure head and the lower pressure head is 250mm, then welding and sealing the upper pressure head and the lower pressure head by using a corrugated pipe steel sheath, the inner diameter of the corrugated pipe is 1500mm, the height of the corrugated pipe is 250mm, the thickness of the corrugated pipe is 2.5mm, and welding a 301L stainless steel pipe exhaust tube on the sheath, the inner diameter of the exhaust tube is 10mm, and the wall thickness of the exhaust tube is 2 mm.
(2) And (5) adopting a vacuum unit to extract air, and welding and sealing the extraction pipe after the vacuum degree is less than 0.1 pa. Putting the mould into a resistance furnace, heating up to 600 ℃ at the heating rate of 5 ℃/min, and preserving heat for 8 h. And taking the die out of the resistance furnace, placing the die on a hydraulic press working platform, and performing hot-pressing compounding under the pressure of 50MPa for 30 minutes.
(3) And (4) cooling the die to room temperature, removing the sheath, and extruding the billet by using a hydraulic press to obtain a compact billet with the diameter of 1500mm and the height of 600 mm.
Example 4
The embodiment provides a method for preparing a macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy, which comprises the following steps:
(1) si particles with the average particle size of 20 mu m and Al powder with the average particle size of 20 mu m are adopted, and are mechanically mixed with steel balls in a mixing tank according to the proportion of 50 vol.% Si/Al, the ball-material mass ratio is 1:1, and the mechanical mixing is carried out for 8 hours. And then placing a No. 45 steel die on a vibration platform, wherein the inner diameter of the die is 500mm, the height of the die is 1200mm, and the wall thickness of the die is 30mm, placing a steel pad of 20mm at the bottom of the steel die, mixing, then placing 350kg of powder into the die, compacting the powder to 60%, and placing the steel pad of 20mm into the die. And welding an upper pressure head and a steel gasket together, wherein the diameter of the upper pressure head is 500mm, the height of the upper pressure head is 500mm, then welding and sealing the upper pressure head by using a thin-wall steel pipe sheath, the inner diameter of the thin-wall steel pipe is 500mm, the height of the thin-wall steel pipe is 500mm, the thickness of the thin-wall steel pipe is 3mm, and welding a 316L stainless steel pipe exhaust tube on the sheath, wherein the inner diameter of the exhaust tube is 8mm, and the wall thickness of the exhaust tube is 2 mm.
(2) And placing the mold into a resistance furnace, connecting an exhaust pipe with a vacuum unit outside the resistance furnace for exhausting, raising the temperature to 600 ℃ at the rate of 5 ℃/min, preserving the temperature for 8h, and keeping the vacuum degree to be less than 0.01 pa. And taking the die out of the resistance furnace, placing the die on a hydraulic press working platform, and performing hot-pressing compounding under the pressure of 40MPa for 10 minutes.
(3) Then cooled to room temperature, and the billet is pressed out of the die by a hydraulic press to obtain a compact billet with the diameter of 500mm and the height of 700 mm.
Comparative example 1
Compared with the example 1, SiC particles with the average particle size of 20 μm and 6092 type Al powder with the average particle size of 30 μm are mechanically mixed with steel balls in a mixing pot according to the proportion of 55 vol.% SiC/6092Al, the ball-material mass ratio is 1:2, and the mechanical mixing is carried out for 2 hours. Then 400Kg of 45 vol.% SiC/6061Al mixed powder is filled into a steel die with the inner diameter of 500mm, the height of 1200mm and the wall thickness of 40mm, cold pressing is carried out by adopting 50MPa, the die after cold pressing is filled into a vacuum hot pressing furnace for vacuum hot pressing sintering, the hot pressing temperature is 620 ℃, the temperature is kept for 2h, then the pressure is increased by 40MPa, and the pressure is kept for 2 h. And (5) cooling the die to room temperature, and removing the die to obtain a billet with the diameter of 500mm and the height of 700 mm.
Comparative example 2
Compared with example 2, SiC particles with the average particle size of 10 μm and Al powder (model number 6061) with the average particle size of 30 μm are mechanically mixed with steel balls in a mixing pot according to the proportion of 45 vol.% SiC/6061Al, the ball-to-material mass ratio is 1:1, and the mechanical mixing is carried out for 8 hours. Then 400Kg of 55 vol.% SiC/6092Al mixed powder is filled into a cold isostatic pressing rubber sheath (the diameter of the sheath is 900mm, the height of the sheath is 1200mm), the cold isostatic pressing pressure is 100MPa, and the pressing time is 30 min; loading the cold isostatic pressing billet into an aluminum sheath for sealing by welding, wherein the vacuum degree is required to be less than 0.01 Pa; and carrying out hot isostatic pressing sintering on the billet subjected to vacuum degassing and sealing, wherein the hot isostatic pressing temperature is 580 ℃, the pressure is 70MPa, and the pressure maintaining time is 2 h. And (3) mechanically processing the hot isostatic pressing billet by adopting a diamond cutter, and removing an aluminum sheath on the surface of the billet to obtain the 55 vol.% SiC/6092Al composite material billet with the overall dimension of 600mm in diameter and 800mm in height.
Comparative example 3
In contrast to example 3, SiC particles having an average particle size of 3.5 μm and 2009Al (Al-4.5Cu-1.2Mg) powder having an average particle size of 20 μm were mechanically mixed in a compounding pot at a ratio of 17 vol.% SiC/2009Al content, at a ball to batch ratio of 1:1, for 4 hours. And then 500kg of the mixed powder is filled into a steel die with the inner diameter of 600mm, the height of 1200mm and the wall thickness of 30mm, cold pressing is carried out at the pressure of 30MPa, the cold-pressed die is filled into a vacuum hot pressing furnace for vacuum hot pressing sintering, the hot pressing temperature is 600 ℃, the temperature is kept for 2h, then the pressure is increased by 20MPa, and the pressure is maintained for 30 min. And (5) cooling the die to room temperature, removing the sheath, and extruding the billet by using a hydraulic press to obtain the billet with the diameter of 600mm and the height of 600 mm.
Comparative example 4
In contrast to example 4, Si particles having an average particle size of 20 μm and Al powder having an average particle size of 20 μm were mechanically mixed in a mixing bowl at a Si/Al composition ratio of 50 vol.% in a ball-to-ball ratio of 1:1 for 4 hours. And then 350kg of the mixed powder is put into a steel die with the inner diameter of 500mm, the height of 1200mm and the wall thickness of 30mm, cold pressing is carried out by adopting 50MPa, the die after cold pressing is put into a vacuum hot pressing furnace for vacuum hot pressing sintering, the hot pressing temperature is 580 ℃, the temperature is kept for 2h, then the pressure is increased by 20MPa, and the pressure is maintained for 30 min. And removing the steel die after machining to obtain a billet with the diameter of 500mm and the height of 700 mm.
In order to verify the performance of the obtained ingots of the macro-quantization particle reinforced aluminum matrix composite, the ingots obtained in examples 1 to 4 and comparative examples 1 to 4 were tested, and the results are shown in table 1.
TABLE 1
Note: only densification was measured in example 3 and comparative example 3, since the low volume fraction composite was subsequently used with deformation treatment and therefore the other properties were of no practical significance.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A method for preparing a macro-quantization particle reinforced aluminum matrix composite material billet based on powder metallurgy is characterized by comprising the following steps:
(1) mixing ceramic powder with aluminum matrix powder and cold-pressing to obtain mixed powder;
(2) heating and pressurizing the mixed powder under a vacuum condition for compounding to obtain a billet intermediate;
(3) and cooling the billet intermediate to obtain the macro-quantization particle reinforced aluminum matrix composite billet.
2. The powder metallurgy-based method for preparing the macro-quantitative particle reinforced aluminum matrix composite billet according to the claim 1, wherein in the step (1), the ceramic powder is SiC, Si, B4C、AlN、TiB2、TiC、Al2O3、Si3N4Carbon nanotubes or graphene, the ceramic powder having an average particle size of less than 100 μm.
3. The method for producing a green ingot of a macro sized particle reinforced aluminum matrix composite material based on powder metallurgy according to claim 1, wherein in the step (1), the aluminum matrix powder is an Al system or one of Al-Mg-Si, Al-Cu-Mg, Al-Zn-Mg, Al-Si, Al-Mg aluminum alloy systems, and the average particle size of the aluminum matrix powder is less than 100 μm.
4. The method for preparing a green ingot of a macro-sized particle reinforced aluminum matrix composite material based on powder metallurgy according to claim 1, wherein in the step (1), the volume content of the ceramic powder is 1 to 70%, and the volume content of the aluminum matrix powder is 99 to 30%.
5. The method for preparing the macro-quantization particle reinforced aluminum matrix composite material billet based on the powder metallurgy is characterized in that in the step (1), the mixing is mechanical mixing, and the mixing time is 1-24 h.
6. The powder metallurgy-based method for preparing the semi-finished ingot of the macro-quantized particle reinforced aluminum matrix composite material according to claim 1, wherein in the step (2), the vacuum degree under the vacuum condition is less than 50 Pa.
7. The method for preparing the macro-quantized particle-reinforced aluminum matrix composite ingot based on the powder metallurgy according to claim 1, wherein in the step (2), the heating mode is as follows: heating to 500-800 ℃ at a heating rate of 1-10 ℃/min, and preserving heat for 1-10 h.
8. The method for preparing the macro-quantization particle reinforced aluminum matrix composite material billet based on the powder metallurgy is characterized in that in the step (2), the pressurizing pressure is more than or equal to 10MPa, and the pressurizing time is more than or equal to 60 s.
9. The macro-quantization particle reinforced aluminum matrix composite material prepared by the method of any one of claims 1 to 8.
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| CN116037930A (en) * | 2022-12-14 | 2023-05-02 | 哈尔滨工业大学 | Preparation method of graphene-silicon nitride synergistically-reinforced aluminum-based composite material |
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