Friction stir additive manufacturing device and method for high-entropy alloy particle reinforced aluminum matrix composite

Abstract

The invention belongs to the technical field of friction stir solid-phase deposition additive manufacturing, and particularly relates to a friction stir additive manufacturing device and method for a high-entropy alloy particle reinforced aluminum matrix composite. Comprising an extrusion deposition system and a continuous feeding system, and the extrusion deposition system comprises an extrusion screw and a rotating shaft shoulder; the continuous feeding system comprises a raw material box, an induction heater and a feeding roller; and a feeding pipe of the continuous feeding system is communicated with an extrusion screw rod of the extrusion deposition system. The device can achieve continuous feeding of raw materials with different particle sizes and efficient and rapid solid-phase additive manufacturing, does not need a protective atmosphere in the additive manufacturing process, can operate in the atmospheric environment, and has the advantages of being high in raw material adaptability, high in additive manufacturing efficiency, low in manufacturing and maintenance cost and the like. According to the method, through heating plasticization and continuous extrusion, a thermoplasticized mixed raw material is deposited on the surface of a substrate to form a deposition layer, meanwhile, stirring friction is conducted on the deposition layer, and rapid preparation of the high-entropy alloy particle reinforced aluminum-based composite material additive body is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of friction stir solid phase deposition additive manufacturing, and specifically relates to a friction stir additive manufacturing device and method for high entropy alloy particle reinforced aluminum-based composite materials. Background Art

[0002] Aluminum-based composite materials have the advantages of low density, high specific strength and good thermal conductivity, and are widely used in aerospace, rail transportation and military equipment. As a multi-principal alloy, high entropy alloy is composed of 5 or more main elements, and the atomic percentage of each main element is 5at%~35at%. Due to its high configuration entropy, high entropy alloys are easy to form simple solid solutions such as FCC and BCC, and have the advantages of high strength, high wear resistance and high toughness. The difference in thermal expansion coefficient between high entropy alloy and metal matrix is ​​relatively small, and as a reinforcing particle and aluminum matrix, it has good metal-metal interface bonding ability, and can form a stable and reliable interface bonding. Due to the effects of various strengthening mechanisms such as fine grain strengthening and dislocation strengthening, the strength and plasticity of composite materials can be improved simultaneously.

[0003] The common preparation method of aluminum-based composite materials is powder metallurgy, which is a process of producing various products by mixing, pressing, sintering at high temperature, etc. with metal powder or metal powder and non-metal powder as raw materials. Due to the pressing and long sintering of the mixed raw materials, the preparation cycle is long, and there are problems such as complex preparation process and high manufacturing cost.

[0004] Additive manufacturing technology is one of the key technologies to meet the country's major needs and support the development of the national economy in the future. It has the characteristics of short manufacturing cycle, high material utilization rate and personalized design. The principle of traditional metal additive manufacturing technology is to use high-energy beams to heat metal raw materials, so that they melt quickly, solidify and accumulate layer by layer. The main problems with traditional high-energy beam additive manufacturing technology are: solidification structure defects such as pores, thermal cracks, and alloy element segregation are easily formed during the solidification process, affecting the comprehensive mechanical properties of the additive body. Furthermore, the high-energy beam micro-area forming method leads to low manufacturing efficiency, strict requirements on powder raw materials, and high manufacturing costs.

[0005] The friction stir solid phase additive manufacturing technology is based on the principle of friction stir welding. It uses consumable metal bars, wires, powders and granular debris, and uses the friction heat and plastic deformation heat generated by high-speed rotation to plasticize the materials. Finally, the hot plasticized materials are deposited layer by layer on the substrate. This technology can effectively avoid the melting and solidification defects of traditional high-energy beam additive manufacturing technology and improve the comprehensive mechanical properties of the additive body.

[0006] In summary, if a device and method can be developed to realize the additive manufacturing of high-entropy alloy particle-reinforced aluminum-based composite materials using stir friction solid-phase additive manufacturing technology, an aluminum-based composite additive body with excellent comprehensive mechanical properties will be obtained, which will have important application value in the fields of aerospace, military equipment, and automobile lightweighting. Summary of the invention

[0007] The present invention provides a friction stir additive manufacturing device and method for high entropy alloy particle reinforced aluminum-based composite materials, so as to solve the technical problems existing in the prior art that the preparation process of traditional high entropy alloy particle reinforced aluminum-based composite materials is complicated and the preparation cycle is long.

[0008] In order to achieve the above object, the present invention adopts the following technical solution: A friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials comprises an extrusion deposition system and a continuous feeding system. The extrusion deposition system comprises an extrusion screw and a rotating shoulder, and the rotating shoulder is arranged at the lower end of the extrusion screw; the continuous feeding system comprises a raw material box, an induction heater and a feeding roller, the induction heater is installed at the bottom of the raw material box, and the feeding roller is installed at the outlet of the raw material box; the feeding pipe of the continuous feeding system is connected to the extrusion screw of the extrusion deposition system.

[0009] The induction heater heats the aluminum alloy raw material to 30%-90% of its solidus line. A vibrator is also installed on the side of the raw material box, and the vibration frequency of the vibrator is 50-100Hz.

[0010] A feed pipe is connected to the outlet of the raw material box. The feed roller is installed in a matching manner with the upper gap of the feed pipe. A fixed spacing of 0.6-0.9 times the maximum particle diameter is left between the surface of the feed roller and the lower surface of the inner part of the feed pipe. The surface of the feed roller has a corrugated groove with a depth of 0.5-1mm.

[0011] A feeding motor is installed on the feeding roller, and the feeding motor drives the feeding roller to rotate, and the rotation speed of the feeding roller is 50-600rpm.

[0012] A rotating base is installed at the upper end of the extrusion deposition system. The rotating base is first fixed with a screw base by bolts. The extrusion screw is connected to the lower end of the screw base by bolts. The rotating base drives the screw base to rotate, and then drives the extrusion screw to rotate at high speed. The rotation speed of the extrusion screw is 100-1600rpm.

[0013] The extrusion screw is a two-section screw consisting of a parallel section and a conical section, wherein the length of the conical screw accounts for 50% of the total length of the extrusion screw.

[0014] The parallel section of the extrusion screw is equipped with a screw housing, and the outer wall of the screw housing is provided with a horizontal feed port.

[0015] A shoulder housing is fixedly installed at the bottom of the screw housing by bolts, a tapered roller bearing is arranged on the shoulder housing, the rotating shoulder and the inner ring of the tapered roller bearing are connected to each other, the screw housing, the rotating shoulder and the extrusion screw form an extrusion cavity, and the horizontal feed port of the screw housing is connected to the upper part of the extrusion cavity.

[0016] The rotating shoulder is connected to the transmission wheel at the lower end of the shoulder motor through a transmission belt. The shoulder motor drives the rotating shoulder to perform high-speed rotational motion. The rotating shoulder speed is 100-400rpm. The bottom of the rotating shoulder has symmetrically shaped protrusions, and the height of the protrusions can be selected to be 1-3mm according to the thickness of the additive layer.

[0017] A method for manufacturing a friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite material, comprising the following steps: Step 1: The ball-milled high entropy alloy powder and aluminum alloy particles are placed in a raw material box in a certain proportion to achieve preliminary uniform densification in the raw material box, and then the induction heater at the bottom of the raw material box preheats the mixed raw materials; Step 2: The preheated mixed raw materials are continuously extruded by the feeding roller, and then transported to the cavity of the extrusion screw after completing the second uniform densification; Step 3: The mixed raw material is strongly sheared and extruded in the extrusion screw during the screw rotation process, and is thermally plasticized, completing the third uniform densification. Subsequently, under the action of the axial feed force of the extrusion screw, the thermally plasticized mixed metal fluid adheres to the surface of the substrate to form a deposition layer; Step 4: The rotating shoulder rotates at high speed to stir and rub the deposited layer on the substrate, causing severe plastic deformation, achieving the fourth uniform densification, and finally obtaining a high-entropy alloy particle-reinforced aluminum-based composite material additive body.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The invention discloses a friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials, which integrates an extrusion deposition system and a continuous feeding system, integrates multiple processes into one device, reduces intermediate links, and simplifies the overall process flow. Through the automated feeding, heating, extrusion and deposition processes, manual operations are reduced and production efficiency is improved. The continuous feeding system can continuously feed the raw materials into the extrusion screw, avoiding intermittent operations and greatly improving production efficiency. The induction heater can quickly and evenly heat the raw materials to ensure that the raw materials reach the ideal temperature before entering the extrusion screw, thereby improving the thermal plasticization efficiency. The high-speed rotation of the rotating shoulder and the extrusion screw strongly shears and stirs the raw materials, promotes the uniform mixing of the high entropy alloy particles and the aluminum alloy matrix, and improves the performance consistency of the composite material. The entire device is designed as a continuous processing mode, which achieves seamless connection from raw material feeding to final molding, greatly shortening the preparation cycle. Through the high-speed rotation of the rotating shoulder and the stirring friction effect, the curing process of the material is accelerated, further shortening the preparation time. This friction stir additive manufacturing device for high-entropy alloy particle-reinforced aluminum-based composites not only simplifies the process flow and improves production efficiency through integrated, automated and optimized design, but also significantly improves the performance and quality of the material and shortens the preparation cycle.

[0019] Furthermore, the induction heater can accurately control the heating temperature of the mixed raw materials, which is conducive to the uniform thermal plasticization of the materials and improves the density and mechanical properties of the materials. At the same time, the combination of the vibrator and the raw material box can further promote the uniform mixing and densification of the raw materials and reduce internal defects.

[0020] Furthermore, the corrugated grooves on the surface of the feeding roller can prevent large particles of mixed raw materials from passing through, thereby ensuring a continuous and stable feeding process.

[0021] Furthermore, by combining the feeding motor with the feeding roller and adjusting the rotation speed of the feeding roller by the feeding motor, the feeding speed of the raw material can be accurately controlled to ensure the stability and consistency of the entire manufacturing process.

[0022] Furthermore, the high-speed rotating extrusion screw can strongly shear and stir the mixed raw materials, promoting uniform mixing and thermal plasticization of the materials.

[0023] Furthermore, the two-stage design of the extrusion screw can better control the flow and pressure distribution of the material and improve the uniformity and density of the material.

[0024] Furthermore, the design in which the horizontal feed port of the screw housing is connected to the extrusion cavity formed by the extrusion screw facilitates the continuous input of raw materials, simplifies the feeding process, and improves the operational convenience of the system.

[0025] Furthermore, through bolt fixing and bearing support, the structural stability and reliability of the entire system are ensured, extending the service life of the equipment.

[0026] Furthermore, the high-speed rotation and convex point design of the rotating shoulder can effectively stir and rub the deposited layer, further improving the density and uniformity of the material.

[0027] Furthermore, the present invention also discloses a method for manufacturing a friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials, which significantly improves the density and mechanical properties of the material through multiple uniform densification treatments (initial uniform densification, second uniform densification, third uniform densification, and fourth uniform densification). The entire manufacturing process is highly integrated and automated, reducing manual intervention, reducing process complexity, and shortening the preparation cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 : Schematic diagram of the structure of the friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials of the present invention; Figure 2 : Schematic diagram of the shape and position of the convex point at the bottom of the rotating shoulder of the present invention; Figure 3 : A cross-sectional view of the friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials of the present invention.

[0029] Explanation of reference numerals: 1. Stationary base; 2. Rotating base; 3. Screw base; 4. Extrusion screw; 5. Base housing; 6. Shoulder motor mounting bracket; 7. Shoulder motor; 8. Drive belt; 9. Drive wheel; 10. Rotating shoulder; 11. Tapered roller bearing; 12. Shoulder housing; 13. Screw housing; 14. Feed pipe; 15. Induction heater; 16. Feed roller; 17. Vibrator; 18. Raw material box; 19. Mounting bracket; 20. Feed motor; 101. Extrusion deposition system; 102. Continuous feeding system; 201. Bump. DETAILED DESCRIPTION

[0030] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1 , Figure 2 and Figure 3A stir friction additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials, comprising a continuous feeding system 102 and an extrusion deposition system 101; the continuous feeding system 102 comprises a raw material box 18, a vibrator 17, an induction heater 15, a mounting frame 19, a feeding roller 16, a feeding motor 20 and a feeding pipe 14; the extrusion deposition system 101 comprises a stationary base 1, a rotating base 2, a screw base 3, an extrusion screw 4, a base housing 5, a shoulder motor mounting frame 6, a shoulder motor 7, a transmission belt 8, a transmission wheel 9, a rotating Shoulder 10, tapered roller bearing 11, shoulder housing 12 and screw housing 13; in the continuous feeding system 102, the raw material box 18 is fixedly connected to the stationary base 1 through the mounting frame 19, and a vibrator 17 is installed on the side of the raw material box 18; a feed roller 16 is installed on the mounting frame 19, and the feed roller 16 is directly driven by a feeding motor 20. The feed roller 16 is installed with a clearance fit with the upper part of the feed tube 14, and a fixed distance is left between the outer surface of the feed roller 16 and the inner lower surface of the feed tube 14, and an induction heater 15 is installed at the bottom of the raw material box 18. In the extrusion deposition system 101, a rotating base is installed at the upper end of the extrusion deposition system, the rotating base is first fixed with a screw base by bolts, the extrusion screw is connected to the lower end of the screw base by bolts, and the base shell 5 is fixedly connected to the stationary base 1; a screw shell 13 is installed at the bottom of the base shell 5, the screw shell 13 is located in the parallel section of the extrusion screw 4, the screw shell 13, the rotating shoulder 10 and the extrusion screw 4 form an extrusion cavity, and the feed port set in the screw shell 13 is connected to the upper part of the extrusion cavity; a shoulder shell 12 is installed at the bottom of the screw shell 13, and a pair of tapered roller shafts are provided on the shoulder shell 12 The mounting groove of the tapered roller bearing 11 is fixedly connected to the mounting groove, the rotating shoulder 10 is connected to the inner ring of the tapered roller bearing 11, and the rotating shoulder 10 can rotate around the tapered roller bearing 11; the shoulder motor 7 is fixedly connected to the base shell 5 through the shoulder motor mounting frame 6, and the rotating shoulder 10 can be rotated by the transmission wheel 9 and the transmission belt 8. The bottom of the rotating shoulder 10 has a symmetrical convex point 201. When the rotating shoulder 10 rotates, the convex point 201 stirs and rubs the additive body formed by the metal solid fluid adhering to the surface of the substrate of the machine tool through the rotational motion.

[0033] A friction stir additive manufacturing device and method for high entropy alloy particle reinforced aluminum-based composite materials, the specific implementation method of which is as follows: After the extrusion deposition system 101 and the continuous feeding system 102 are powered on, the feeding motor 20 and the shoulder motor 7 are all started, and the high entropy alloy and aluminum alloy metal particles and debris placed in the raw material box 18 in advance are transported to the bottom of the raw material box 18 under the action of their own gravity and the vibrator 17. The vibrator 17 preliminarily mixes the loose metal particles and debris, thereby improving the transportation efficiency. The induction heater 15 is located at the bottom of the raw material box 18, and the induction heater 15 can preheat the mixed raw materials. The mixed raw materials after preheating treatment are subjected to secondary densification under the action of extrusion and conveying by the feed roller 16; the feed motor 20 drives the feed roller 16 to rotate, and the feed roller 16 is installed with a gap fit with the feed tube 14 at its lower end, and a fixed spacing of 0.6-0.9 times the maximum particle diameter is left between the surface of the feed roller 16 and the lower surface of the inner part of the feed tube 14, and the spacing size can be adjusted according to the particle size. The feed roller 16 rotates along the feed tube 14 to extrude the mixed raw materials to complete the secondary densification, wherein the surface of the feed roller 16 has a corrugated groove with a depth of 0.5-1mm, which helps to increase the friction between the feed roller 16 and the mixed raw materials and improve the conveying efficiency.

[0034] Then it is continuously transported to the feeding pipe 14, which is connected to the feeding port of the screw housing 13. An extrusion cavity is formed between the screw housing 13, the rotating shaft shoulder 10 and the extrusion screw 4. The feeding port of the screw housing 13 is connected to the extrusion cavity. The mixed raw materials after secondary densification are finally transported to the extrusion cavity formed by the screw housing 13 and the extrusion screw 4 through the feeding port on the screw housing 13, thereby realizing efficient and continuous transportation of the raw materials.

[0035] The stir friction additive manufacturing device is connected to the machine tool. When the machine tool is running, the rotating base 2 is driven to rotate. The screw base 3 is connected to the rotating base 2 by bolts. The extrusion screw 4 is fixedly connected to the screw base 3 under the action of the top screw. When the rotating base 2 rotates, the extrusion screw 4 is driven to rotate at a high speed through the screw base 3. The extrusion screw 4 is composed of a two-section screw composed of a parallel section and a conical section, wherein the length of the conical section screw accounts for 50% of the extrusion screw 4. The mixed raw materials after secondary densification transported to the extrusion cavity are gradually transported from the parallel section of the extrusion screw 4 to the bottom of the conical section under the high-speed rotation of the extrusion screw 4. The speed range of the extrusion screw 4 is 100-1600rpm. During the rotation of the extrusion screw 4, the mixed raw materials are strongly sheared and extruded, and thermal plasticization occurs, completing the third densification. Subsequently, under the action of the axial feed force of the extrusion screw 4, the thermally plasticized metal solid fluid adheres to the substrate surface of the machine tool.

[0036] The shoulder motor 7 drives the transmission wheel 9 at its lower end to rotate. One end of the transmission wheel 9 is connected to the rotating shoulder 10 at the lower end of the extrusion screw 4 through the transmission belt 8. The transmission wheel 9 drives the rotating shoulder 10 to rotate at a high speed through the transmission belt 8. The rotation speed range of the rotating shoulder 10 is: 100-400rpm; a plurality of evenly and symmetrically arranged convex points 201 are arranged at the bottom of the rotating shoulder 10. The bottom surface of the rotating shoulder 10 and the convex points 201 on the bottom surface stir and rub the additive body on the substrate, causing severe plastic deformation, thereby realizing the fourth densification.

[0037] At this time, the metal is still in a solid state, not melting, and has no melting and solidification defects. After four densifications, discrete metal particles, debris and other raw materials can achieve high-quality solid-phase additive manufacturing with continuous feeding, and the additive body has excellent performance.

[0038] The present invention is described in detail below in conjunction with specific embodiments.

[0039] Example 1 The CoCrFeNi high entropy alloy particles are selected as the reinforcement phase, and the particle size distribution range of the high entropy alloy particles is 30-50 , the matrix is ​​selected as 6061 aluminum alloy with a particle size range of 1-3 mm, and the high entropy alloy particles with a volume fraction of 5% and the 6061 aluminum alloy particles are placed in the raw material box 18; the vibrator frequency is selected as 60 Hz, and the induction heater temperature is set to 250°C; The depth of the corrugated groove on the surface of the feed roller 16 is 0.6 mm, the clearance between the surface of the feed roller 16 and the lower surface of the inner part of the feed tube 14 is 1.8 mm, and the rotation speed of the feed roller 16 is set to 250 rpm. Under the continuous extrusion action, the mixed raw material is continuously extruded into the feed tube 14 and finally transported to the extrusion cavity; The extrusion screw rotates counterclockwise, and the speed is set to 600 rpm. Under the rotation of the extrusion screw 4, the raw material delivered to the extrusion cavity is gradually transported from the parallel section of the extrusion screw 4 to the bottom end of the conical section. Then, under the action of the axial feed force of the extrusion screw 4, the thermoplasticized metal solid fluid adheres to the surface of the substrate to form a deposition layer.

[0040] Driven by the shoulder motor 7, the rotating shoulder 10 rotates clockwise at a speed of 200 rpm. The bottom surface of the rotating shoulder 10 and the 1 mm height protrusion 201 on the bottom surface stir and rub the additive body on the substrate, causing severe plastic deformation, thereby refining the microstructure of the additive body and making it uniformly dense, and finally obtaining a high entropy alloy particle reinforced aluminum-based composite material additive body.

[0041] This example successfully prepared a 3mm thick high entropy alloy particle reinforced aluminum-based composite material additive body, and no melting occurred during the additive process, and there was no melting and solidification defect. The tensile strength of the additive body was 273MPa, the elongation was 19%, the internal structure of the additive body was dense, and the reinforcement phase high entropy alloy particles were evenly distributed, as shown in Table 1 below.

[0042] Table 1

[0043] Example 2 The CoCrFeNi high entropy alloy particles are selected as the reinforcement phase, and the particle size distribution range of the high entropy alloy particles is 50-70 , the matrix is ​​selected as 6061 aluminum alloy with a particle size range of 2-4 mm, and the high entropy alloy particles with a volume fraction of 10% and the 6061 aluminum alloy particles are placed in the raw material box 18; the vibrator frequency is selected as 80 Hz, and the induction heater temperature is set to 350°C; The depth of the corrugated groove on the surface of the feed roller 16 is 1 mm, the clearance between the surface of the feed roller 16 and the lower surface of the inner part of the feed tube 14 is 2.5 mm, and the rotation speed of the feed roller 16 is set to 200 rpm. Under the continuous extrusion action, the mixed raw material is continuously extruded into the feed tube 14 and finally transported to the extrusion cavity; The extrusion screw rotates counterclockwise, and the speed is set to 1000 rpm. Under the rotation of the extrusion screw 4, the raw material delivered to the extrusion cavity is gradually transported from the parallel section of the extrusion screw 4 to the bottom end of the conical section. Then, under the action of the axial feed force of the extrusion screw 4, the thermoplasticized metal solid fluid adheres to the surface of the substrate to form a deposition layer.

[0044] Driven by the shoulder motor 7, the rotating shoulder 10 rotates clockwise at a speed of 250 rpm. The bottom surface of the rotating shoulder 10 and the 2 mm height protrusions 201 on the bottom surface stir and rub the additive body on the substrate, causing severe plastic deformation, thereby refining the microstructure of the additive body and making it uniformly dense, and finally obtaining a high entropy alloy particle reinforced aluminum-based composite material additive body.

[0045] This embodiment successfully prepared a high entropy alloy particle reinforced aluminum-based composite material additive body with a thickness of 5 mm. No melting occurred during the additive process, and there was no melting and solidification defect. The tensile strength of the additive body was 258 MPa, the elongation was 22%, the internal structure of the additive body was dense, and the reinforced phase high entropy alloy particles were evenly distributed. The present invention can realize high-quality solid-phase additive manufacturing of high entropy alloy particle reinforced aluminum-based composite materials with continuous feeding, as shown in Table 2 below.

[0046] Table 2

[0047] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials, characterized in that: The invention comprises an extrusion deposition system (101) and a continuous feeding system (102). The extrusion deposition system (101) comprises an extrusion screw (4) and a rotating shaft shoulder (10), wherein the rotating shaft shoulder (10) is arranged at the lower end of the extrusion screw (4); the continuous feeding system (102) comprises a raw material box (18), an induction heater (15) and a feeding roller (16), wherein the induction heater (15) is installed at the bottom of the raw material box (18), and the feeding roller (16) is installed at the outlet of the raw material box (18); and the feeding pipe (14) of the continuous feeding system (102) is connected to the extrusion screw (4) of the extrusion deposition system (101).

2. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite material according to claim 1, characterized in that: The induction heater (15) heats the aluminum alloy raw material to 30%-90% of its solidus line. A vibrator (17) is also installed on the side of the raw material box (18). The vibration frequency of the vibrator (17) is 50-100 Hz.

3. A friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to claim 2, characterized in that: The outlet of the raw material box (18) is connected to a feed pipe (14), a feed roller (16) is installed in a clearance fit with the upper portion of the feed pipe (14), a fixed spacing of 0.6 to 0.9 times the maximum particle diameter is left between the surface of the feed roller (16) and the lower surface of the inside of the feed pipe (14), and the surface of the feed roller (16) has a corrugated groove with a depth of 0.5 to 1 mm.

4. A friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to claim 3, characterized in that: The feed roller (16) is provided with a feed motor (20), and the feed motor (20) drives the feed roller (16) to rotate, and the rotation speed of the feed roller (16) is 50-600 rpm.

5. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite material according to claim 1, characterized in that: The extrusion deposition system (102) is provided with a rotating base (2) at the upper end. The rotating base (2) is first fixed with a screw base (3) by bolts. The extrusion screw (4) is connected to the lower end of the screw base (3) by bolts. The rotating base (2) drives the screw base (3) to rotate, thereby driving the extrusion screw (4) to perform high-speed rotation. The rotation speed of the extrusion screw (4) is 100-1600 rpm.

6. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite material according to claim 5, characterized in that: The extrusion screw (4) is a two-section screw consisting of a parallel section and a conical section, wherein the length of the conical screw accounts for 50% of the total length of the extrusion screw (4).

7. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite material according to claim 6, characterized in that: The parallel section of the extrusion screw (4) is provided with a screw housing (13), and the outer wall of the screw housing (13) is provided with a horizontal feed port.

8. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite material according to claim 7, characterized in that: A shoulder housing (12) is fixedly mounted on the bottom of the screw housing (13) by bolts, a tapered roller bearing (11) is arranged on the shoulder housing (12), the rotating shoulder (10) and the inner ring of the tapered roller bearing (11) are connected to each other, the screw housing (13), the rotating shoulder (10) and the extrusion screw (4) form an extrusion cavity, and the horizontal feed port of the screw housing (13) is connected to the upper part of the extrusion cavity.

9. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite material according to claim 8, characterized in that: The rotating shoulder (10) is connected to the transmission wheel (9) at the lower end of the shoulder motor (7) through a transmission belt (8), and the shoulder motor (7) drives the rotating shoulder (10) to perform high-speed rotational motion, and the rotation speed of the rotating shoulder (10) is 100-400rpm; the bottom of the rotating shoulder (10) has a symmetrically shaped protrusion (201), and the height of the protrusion (201) can be selected to be 1-3mm according to the thickness of the additive layer.

10. A method for manufacturing a friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials, based on a friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: placing the ball-milled high entropy alloy powder and aluminum alloy particles in a raw material box (18) in a certain proportion, achieving preliminary uniform densification in the raw material box (18), and then preheating the mixed raw materials with an induction heater (15) at the bottom of the raw material box (18); Step 2: The preheated mixed raw material is continuously extruded by the feeding roller (16), and then uniformly densified for the second time and then transported to the cavity of the extrusion screw (4); Step 3: The mixed raw material is strongly sheared and extruded in the extrusion screw (4) during the screw rotation process, and is thermally plasticized, completing the third uniform densification. Subsequently, under the action of the axial feed force of the extrusion screw (4), the thermally plasticized mixed metal fluid adheres to the surface of the substrate to form a deposition layer; Step 4: The rotating shoulder (10) rotates at a high speed to stir and rub the deposited layer on the substrate, causing severe plastic deformation, achieving the fourth uniform densification, and finally obtaining a high entropy alloy particle reinforced aluminum-based composite material additive body.

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