A method for manufacturing near-net-shape aluminum-based composite material parts and the parts themselves.

Abstract

This invention discloses a near-net-shape aluminum-based composite material part manufacturing method and part. The manufacturing method includes: establishing a three-dimensional part model of the part to be manufactured, wherein the part model has a built-in double-helix siphon microchannel; slicing the part model to obtain slice data for each layer, wherein the slice data includes the geometry and printing path of the part in that layer; printing the part model using sand mold printing according to the slice data to obtain a preform, wherein after printing each layer, a binder is sprayed onto the powder layer used for printing; the preform is sequentially sintered, post-treated, and pre-treated to obtain a treated preform; the treated preform is placed in a pre-fabrication container, impregnated with molten aluminum, and then slowly cooled and solidified to obtain the part to be manufactured. This invention solves the problems of high processing difficulty and difficulty in controlling the precision of aluminum-based composite material parts in the prior art.

Description

Technical Field

[0001] This invention relates to the field of aluminum-based composite materials technology, and in particular to a method for manufacturing near-net-shape aluminum-based composite material parts and the parts themselves. Background Technology

[0002] With the rapid development of the aviation and new energy vehicle industries, higher and lighter requirements have been placed on basic materials. The application of various alloys and composite materials, mainly aluminum, is gradually opening up. At the same time, in the process of industrialization, a series of problems, including processes, costs, and yield rates, are gradually emerging.

[0003] The application of aluminum-based composite materials in the automotive industry was the earliest research and development. The use of particle-reinforced aluminum-based composite materials to manufacture automotive brake discs was first introduced in the United States, significantly reducing weight while improving wear resistance and noise. Composite materials are also widely used in brake rotors, brake pistons, and brake pads. In the aerospace field, the requirements for weight reduction are even more stringent, and aluminum-based composite materials precisely meet these requirements. Composite materials developed using investment casting have replaced titanium alloys in the manufacture of aircraft camera lens mounts, significantly reducing cost and weight while improving thermal conductivity. This composite material can also be used to manufacture satellite reaction wheels and mount support frames. Due to its low coefficient of thermal expansion, low density, and good thermal conductivity, aluminum-based composite materials are also suitable for manufacturing packaging materials and heat sinks for electronic devices. The coefficient of thermal expansion of aluminum-based composite materials perfectly matches the thermal expansion of electronic device materials, and its excellent electrical and thermal conductivity makes it commonly used in the manufacture of telescope brackets and secondary mirrors, as well as precision parts for inertial navigation systems, laser gyroscopes, reflectors, mirror bases, and optical instrument brackets.

[0004] Despite the many advantages of aluminum-based composite materials, their complex manufacturing process and material properties make the production of complex components extremely costly. This is mainly reflected in the difficulty of processing and the challenge of controlling precision, which greatly affects the promotion and engineering application of aluminum-based composite materials. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a near-net-shape aluminum-based composite material part manufacturing method and part, aiming to solve the problems of high processing difficulty and difficulty in controlling precision of aluminum-based composite materials in the prior art.

[0006] The embodiments of the present invention are implemented as follows:

[0007] A method for manufacturing near-net-shape aluminum-based composite material parts, the method comprising:

[0008] A three-dimensional part model of the part to be manufactured is established, wherein the part model has a built-in double helical siphon microchannel;

[0009] The part model is sliced ​​to obtain slice data for each layer of the part model. The slice data includes the geometry and printing path of the part in that layer.

[0010] A preform is obtained by printing the part model using sand mold printing based on the slice data, wherein an adhesive is sprayed onto the powder layer used for printing after each layer is printed;

[0011] The preform is subjected to sintering, post-treatment and pre-treatment in sequence to obtain the preform after treatment;

[0012] The preformed blank is placed in a preformed container, impregnated with molten aluminum, and then slowly cooled and solidified to obtain the part to be manufactured.

[0013] Furthermore, in the above-mentioned near-net-shape aluminum-based composite material parts manufacturing method, the sintering temperature is 1100℃-1600℃, the sintering time is 10min-50min, and the sintering pressure is 10 MPa-30MPa.

[0014] Furthermore, in the above-mentioned method for manufacturing near-net-shape aluminum-based composite material parts, the post-processing steps include:

[0015] The sintered preform is trimmed, processed and surface-treated to obtain a ceramic preform with a preset tensile strength;

[0016] The preset tensile strength is 0.8MPa-2MPa.

[0017] Furthermore, in the above-mentioned method for manufacturing near-net-shape aluminum-based composite material parts, the pretreatment step includes:

[0018] The preform after post-processing is cleaned, the oxide layer is removed, and the surface is polished to ensure that the surface of the preform is free of impurities and contaminants.

[0019] Furthermore, in the above-mentioned near-net-shape aluminum-based composite material part manufacturing method, the channel diameter is 0.1~0.4mm, the pipe bevel angle is 35°-60°, and the spacing between each of the double-helix microchannels is 0.5~1.5mm.

[0020] Furthermore, in the above-mentioned method for manufacturing near-net-shape aluminum-based composite material parts, the thickness of each layer of the adhesive is 0.3 mm - 0.5 mm.

[0021] Furthermore, in the above-mentioned method for manufacturing near-net-shape aluminum-based composite material parts, the powder used for sand printing is SiC particles, and the binder is resin adhesive.

[0022] Furthermore, in the above-mentioned method for manufacturing near-net-shape aluminum-based composite material parts, the slow cooling rate is 80-140℃ / h.

[0023] Furthermore, the above-mentioned method for manufacturing near-net-shape aluminum-based composite material parts, after the step of placing the processed preform into a preform container, impregnating it with molten aluminum, and then slowly cooling and solidifying it to obtain the part to be manufactured, further includes:

[0024] The parts to be manufactured are processed to improve their appearance and the required dimensional accuracy. The processing includes at least grinding, polishing, and machining.

[0025] Another object of the present invention is to provide a near-net-shape aluminum-based composite material part, which is prepared by the above-described near-net-shape aluminum-based composite material part manufacturing method.

[0026] Compared with existing technologies: By establishing a three-dimensional part model of the part to be manufactured with a double-helix siphon microchannel, sand printing is used to print the part model according to the slice data to obtain a preform. After printing each layer, an adhesive is sprayed onto the powder layer used for printing. The resulting material has a dense structure and stable structure, which can well realize the near-net-shape forming of complex aluminum-based composite materials, avoiding the integral forming method of mold processing. By printing, a blank close to the shape of the part can be designed, with small machining allowance and minimal damage to the tool, which can well ensure dimensional accuracy. Furthermore, through the double-helix siphon structure design, the aluminum alloy melt can be self-filled and rapidly aluminized, which can well complete the infiltration process of special structures and prepare structures and properties that meet the needs of practical applications. The double-helix siphon structure can realize multi-stage liquid siphon. While the aluminum alloy melt climbs upward, it can also compensate for the irregular ceramic particle gaps caused during the debinding process through the self-propagation effect, so as to achieve dense and stable material. Attached Figure Description

[0027] Figure 1 This is a flowchart of a near-net-shape aluminum-based composite material part manufacturing method according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the double-helix siphon microchannel structure in a near-net-shape aluminum-based composite material part manufacturing method according to an embodiment of the present invention.

[0029] Figure 3This is a top view of the double-helix siphon microchannel placed in the cup body in the near-net-shape aluminum-based composite material part manufacturing method of an embodiment of the present invention.

[0030] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0031] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0032] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] This invention addresses the drawbacks of widely used aluminum-based composite materials, such as high processing difficulty and difficulty in controlling precision. It proposes a near-net-shape aluminum-based composite material part manufacturing method and the resulting part, wherein:

[0035] Please see Figure 1 The image shows a method for manufacturing near-net-shape aluminum-based composite material parts according to an embodiment of the present invention, comprising:

[0036] Step S10: Establish a three-dimensional part model of the part to be manufactured, wherein the part model has a built-in double helical siphon microchannel.

[0037] The required part model structure is designed using 3D modeling software, with a certain margin, such as 0.1mm, reserved on the outer surface of the structure. Multiple double-helix siphon microchannels are densely arranged within the part's matrix. The specific number of double-helix siphon microchannels can be set according to actual conditions. In practice, the diameter of the double-helix siphon microchannels is 0.1~0.4mm, the bevel angle of the channel is 35°-60°, and the double-helix spacing is 0.5~1.5mm.

[0038] Step S11: Slice the part model to obtain slice data for each layer of the part model. The slice data includes the geometry and printing path of the part in that layer.

[0039] Specifically, the model is sliced, and the slice data of each layer includes the geometry of the part in that layer and the printing path. The layer thickness is designed to be 0.3-0.5mm, which is the thickness of the powder spread in each layer during the printing process.

[0040] Step S12: The part model is printed using sand mold printing according to the slice data to obtain a preform, wherein after printing each layer, an adhesive is sprayed onto the powder layer used for printing.

[0041] Specifically, the binder is sprayed onto a layer of ceramic powder, depositing on the powder and forming a binder layer following the path specified in the slicing data. The nozzle precisely controls the spraying of liquid binder onto the powder layer according to the design model requirements, spraying the binder at specific locations to bond and shape it, with a layer thickness of 0.3-0.5mm. After spraying one layer of binder, the 3D printer lowers the building platform a certain distance to prepare space for the next layer. Then, binder is sprayed again to apply the next layer of powder, bonding it to the previous layer, and so on, layer by layer, to form a solid object. When using sand mold printing, the powder and ink are prepared in advance. Specifically, the powder particles can be selected from high-silica sand, ceramsite sand, quartz sand, or SiC, etc. For the preparation of aluminum-based composite materials, SiC particles are generally used as the raw material required for building the object. The appropriate powder material is selected according to the requirements of the object and the material properties. SiC powder materials must have a certain particle size and flowability to facilitate spreading and stacking. The ink is generally made of resin glue to facilitate debinding later. The ink accounts for 80-150%, and the gas generation during sintering is required to be <18g / mL.

[0042] Step S13: The preform is subjected to sintering, post-treatment and pre-treatment in sequence to obtain the preform after treatment.

[0043] Specifically, the printed preform is sintered at a temperature of 1100℃-1600℃ for 10-50 minutes. Appropriate pressure is required during sintering, controlled at 10-30 MPa, to facilitate the release of the binder and the sintering of the powder into a solid ceramic structure. The sintered preform is then trimmed, processed, and surface-treated to obtain a final stable ceramic preform. A tensile strength of 0.8-2 MPa is considered acceptable. To improve penetration and siphon effects, the printed preform needs to be cleaned, have its oxide layer removed, and be surface-polished to ensure the ceramic preform surface is free of impurities and contaminants.

[0044] Step S14: The processed preform is placed into a preform container, impregnated with molten aluminum, and then slowly cooled and solidified to obtain the part to be manufactured.

[0045] Specifically, the pre-treated preform is sealed at one end and placed in a container. Then, the impregnation medium (molten aluminum) is poured into the container to fully submerge the preform. The seal at one end is then opened, allowing the impregnation medium to permeate the preform along a designed double-helix siphon structure. After the siphoning process, the other end is sealed and the preform is removed. For example... Figure 2 , 3 As shown, the double-helix siphon microchannel 10 consists of two spirals rotating in the same direction. When set up, it is generally installed through the substrate of the part, densely distributed within the substrate, with openings at both ends of the substrate that connect to the outside. This allows for the siphon effect to draw in molten aluminum. For example, the double-helix siphon microchannel 10 penetrates the wall of a barrel-shaped part, such as a water cup 20, with both ends connecting to the outside through the upper and lower parts of the cup wall. During impregnation, one end is sealed before immersion, and the sealed portion is opened after immersion. The impregnation medium self-fills the water cup under the siphon effect. After the preform has been immersed for a period of time, the siphon effect ends, and the cup is sealed again. It is then removed from the container and properly treated to remove excess impregnation medium, ensuring minimal residual impregnation medium on the surface of the preform. It is then placed in a vacuum furnace for slow cooling at a rate of 80~140℃ / h. After impregnation, the impregnated part needs to undergo curing and heat treatment to achieve the required performance and structure.

[0046] In addition, after obtaining the parts, they are processed, such as grinding, polishing, and machining, to improve their appearance and the required dimensional accuracy to meet specific requirements and functions.

[0047] On the other hand, the present invention also proposes a near-net-shape aluminum-based composite material part, which is prepared by the above-described near-net-shape aluminum-based composite material part manufacturing method.

[0048] To facilitate understanding of the present invention, a more complete description will be given below with reference to relevant embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0049] Example 1

[0050] Design Model: The required part model structure is designed using 3D modeling software. A 0.1mm margin is retained on the outer surface of the structure. It has a built-in double helix siphon microchannel with a diameter of 0.1mm and a pipe bevel angle of 35°. The microchannels are densely distributed in the matrix, and the distance between two adjacent double helices is 0.5mm.

[0051] Model processing: The model is sliced, and the slice data of each layer includes the geometry of the part in that layer and the printing path. The layer thickness is designed to be 0.3~0.5mm, which is the thickness of powder spreading in each layer during the printing process.

[0052] Powder and binder preparation: The powder particles are SiC. A suitable powder material is selected based on the requirements of the object and the material properties. The SiC powder material must have a certain particle size and flowability to facilitate spreading and stacking. A resin adhesive is used as the binder to facilitate subsequent debinding. The binder accounts for 80-150% of the total composition, and the sintering gas generation requirement is <18g / mL.

[0053] Adhesive spraying: The adhesive is sprayed onto a layer of ceramic powder. The adhesive is deposited on the powder and forms an adhesive layer according to the path specified in the slicing data. The nozzle sprays liquid adhesive onto the powder layer. It is precisely controlled according to the requirements of the design model to spray the adhesive at specific locations to make it bond and form. The layer thickness is required to be 0.3~0.5mm.

[0054] Interlayer spraying and deposition: After spraying a layer of binder, the 3D printer lowers the building platform a certain distance to prepare space for the next layer. Then, binder is sprayed again to apply the next layer of powder, bonding it to the previous layer, and the process is repeated to build up the solid layer by layer.

[0055] Sintering process: The printed preform is sintered at a temperature of 1100℃ for 10-50 minutes. Appropriate pressure is required during the sintering process, with the pressure controlled at 10MPa, so that the binder can be smoothly released and the powder can be sintered into a solid ceramic structure.

[0056] Post-processing: The sintered preform is trimmed, processed and surface-treated to obtain the final stable ceramic preform with a tensile strength of 0.8~2MPa.

[0057] Pre-treatment of ceramic preforms after printing: In order to improve the penetration and siphon effect, the printed preforms need to be cleaned, the oxide layer removed, and the surface polished to ensure that the surface of the ceramic preforms is free of impurities and contaminants.

[0058] Impregnation of preforms: One end of the pre-treated preform is sealed and placed in a container. Then, the impregnation medium (molten aluminum) is poured into the container to fully immerse the preform. After that, the seal at one end is opened, and the impregnation medium will fill the preform structure along the designed double-helix siphon structure. After siphoning, the seal at one end is closed and the preform is pulled out.

[0059] Remove excess impregnation medium: After the preform has been immersed for a period of time, remove it from the container and treat it appropriately to remove excess impregnation medium to ensure that there is as little residual impregnation medium as possible on the surface of the preform. Place it in a vacuum furnace for slow cooling at a rate of 80~140℃ / h.

[0060] Subsequent processing and curing: After impregnation, the impregnated parts need to undergo curing and heat treatment to achieve the required performance and structure.

[0061] Post-impregnation processing: such as grinding, polishing, machining, etc., to improve appearance and required dimensional accuracy to meet specific requirements and functions.

[0062] Example 2

[0063] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0064] The channel diameter is 0.3 mm.

[0065] Example 3

[0066] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0067] The channel diameter is 0.4 mm.

[0068] Example 4

[0069] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0070] The pipe's bevel angle is 45°.

[0071] Example 5

[0072] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0073] The bevel angle of the pipe is 50°.

[0074] Example 6

[0075] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0076] The oblique angle of the pipe is 60°.

[0077] Example 7

[0078] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0079] The spacing between the double-helix microchannels is 1 mm.

[0080] Example 8

[0081] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0082] The spacing between the double-helix microchannels is 1.5 mm.

[0083] Example 9

[0084] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0085] The sintering pressure is 20 MPa.

[0086] Example 10

[0087] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0088] The sintering pressure is 30 MPa.

[0089] Example 11

[0090] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0091] The sintering temperature is 1300℃.

[0092] Example 12

[0093] This embodiment also proposes a near-net-shape aluminum-based composite material part manufacturing method. The difference between this embodiment and the near-net-shape aluminum-based composite material part manufacturing method proposed in Embodiment 1 is as follows:

[0094] The sintering temperature is 1600℃.

[0095] In order to compare with the above embodiments of the present invention, the present invention also provides the following comparative examples.

[0096] Compare with Example 1

[0097] The present invention also proposes a method for manufacturing near-net-shape aluminum-based composite material parts in a comparative example. The difference between this comparative example and the one in Example 1 is that:

[0098] In contrast to Example 1, which describes a traditional near-net-shape aluminum-based composite material parts manufacturing method, aluminum-based composite material parts are manufactured using a pressure infiltration method.

[0099] Please refer to Table 1 below, which shows the parameters corresponding to Embodiments 1 to 12 and Comparative Example 1 of the present invention.

[0100] Table 1

[0101]

[0102] In Table 1 above, in practical applications, the corresponding parts were prepared using the preparation methods and parameters corresponding to Examples 1-12 and Comparative Example 1 of the present invention, respectively, and then tested. The test data are shown in Table 2 below. It should be noted that, in order to ensure the reliability of the verification results, the parts prepared in Examples 1-12 and Comparative Example 1 of the present invention should be the same except for the parameters mentioned above.

[0103] Table 2:

[0104]

[0105] Combining the data in Tables 1 and 2 above, it is evident that by establishing a three-dimensional part model with a double-helix siphon microchannel, and using sand printing to print the part model based on the slice data to obtain a preform, where an adhesive is sprayed onto the powder layer used for printing after each layer of printing, the resulting material has a dense structure and stable structure. This allows for near-net-shape forming of complex aluminum-based composite materials, avoiding the need for integral molding using molds. Printing allows for the design of blanks that closely resemble the shape of the part, with small machining allowances and minimal damage to cutting tools, ensuring excellent dimensional accuracy. Furthermore, the double-helix siphon structure design enables self-filling of molten aluminum alloy, rapid aluminizing, and excellent completion of the infiltration process for special structures, resulting in structures and properties that meet practical application requirements. The double-helix siphon structure enables multi-stage liquid siphoning, allowing the molten aluminum alloy to climb upwards while also compensating for irregular ceramic particle gaps caused during debinding through a self-propagating effect, achieving a dense and stable material.

[0106] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method of making a near-net shape aluminum matrix composite part, comprising: The method includes: A three-dimensional part model of the part to be manufactured is established, wherein the part model has a built-in double helical siphon microchannel; The part model is sliced ​​to obtain slice data for each layer of the part model. The slice data includes the geometry and printing path of the part in that layer. A preform is obtained by printing the part model using sand mold printing based on the slice data, wherein an adhesive is sprayed onto the powder layer used for printing after each layer is printed; The preform is subjected to sintering, post-treatment and pre-treatment in sequence to obtain the preform after treatment; The preformed blank is placed in a pre-made container, impregnated with molten aluminum, and then slowly cooled and solidified to obtain the part to be manufactured.

2. The method of claim 1, wherein The sintering temperature is 1100℃-1600℃, the sintering time is 10min-50min, and the sintering pressure is 10MPa-30MPa.

3. The method for manufacturing near-net-shape aluminum-based composite material parts according to claim 1, characterized in that, The post-processing steps include: The sintered preform is trimmed, processed and surface-treated to obtain a ceramic preform with a preset tensile strength; The preset tensile strength is 0.8MPa-2MPa.

4. The method for manufacturing near-net-shape aluminum-based composite material parts according to claim 1, characterized in that, The preprocessing steps include: The preform after post-processing is cleaned, the oxide layer is removed, and the surface is polished to ensure that the surface of the preform is free of impurities and contaminants.

5. The method for manufacturing near-net-shape aluminum-based composite material parts according to claim 1, characterized in that, The channel diameter is 0.1~0.4mm, the pipe bevel angle is 35°-60°, and the spacing between each of the double helix microchannels is 0.5~1.5mm.

6. The method for manufacturing near-net-shape aluminum-based composite material parts according to claim 1, characterized in that, The thickness of each layer of the adhesive is 0.3mm-0.5mm.

7. The method for manufacturing near-net-shape aluminum-based composite material parts according to claim 1, characterized in that, The powder used for sand printing is SiC particles, and the binder is resin glue.

8. The method for manufacturing near-net-shape aluminum-based composite material parts according to claim 1, characterized in that, The slow cooling rate is 80~140℃ / h.

9. The method for manufacturing near-net-shape aluminum-based composite material parts according to any one of claims 1 to 8, characterized in that, After the step of placing the processed preform into a pre-fabrication container, impregnating it with molten aluminum, and then slowly cooling and solidifying it to obtain the part to be manufactured, the method further includes: The parts to be manufactured are processed to improve their appearance and the required dimensional accuracy. The processing includes at least grinding, polishing, and machining.

10. A near-net-shape aluminum-based composite material part, characterized in that, The aluminum-based composite material part is prepared by the near-net-shape aluminum-based composite material part manufacturing method according to any one of claims 1 to 9.

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