A method for enhancing the high-efficiency mixing of reinforcing phase particles and aluminum matrix material particles

Abstract

The application discloses a kind of reinforced phase particles and aluminium matrix material particle high-efficiency mixing method, it is related to alloy technical field.The application controls and separately controls the relative granularity of reinforced phase and aluminium matrix material particle, and the granularity of reinforced phase and aluminium matrix particle, to ensure the uniformity of mixed powder, satisfy the requirement of preparing material organization uniformity, by the control of particle feeding parameter and ultrasonic oscillation pretreatment, so that mixed particle is uniform, dispersed and pre-spheroidized, by the rationalization control of particle mixing process parameter in whole process, including feeding, discharge control, speed control and temperature rising rate control, realize that wet combination is good, distribution is uniform, surface is smooth, and the particle mixing of high-efficiency activity is realized.The mixing mode of the application can realize that ingot blank organization phase distribution is uniform, size is uniform, performance is excellent, and interface combination is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the alloy technical field, in particular to a kind of reinforced phase particles and aluminium matrix material particle high-efficiency mixing method. BACKGROUND

[0002] Aluminum alloy has the advantages of low density, good plasticity and toughness, better thermal and electrical conductivity, etc., and by adding reinforced phase, it has excellent characteristics such as high thermal conductivity, high specific stiffness, good wear resistance and good dimensional stability, and has wide application prospects in the industries of aerospace, automobile and ship.

[0003] The selection of aluminum matrix composite material preparation process not only needs to fully consider the size, physical properties and chemical properties of the reinforcing body, but also needs to consider the compatibility between the reinforcing body and the aluminum matrix and the physical and chemical properties of the aluminum matrix itself. Hot isostatic pressing method is favored because of uniform distribution of reinforced phase, easy control of interface reaction and large selection of process parameters.

[0004] The uniformity of the mixing of reinforced phase particles and aluminum matrix material powder, the activity of the powder, and the physical properties of the mixed powder are not mature and stable, which directly leads to the difficulty in achieving stable quality requirements in terms of chemical composition, density, organization distribution and interface control of the prepared material, and ultimately affects the performance of the formed product. Therefore, it is necessary to provide a kind of reinforced phase particles and aluminum matrix material particle powder high-efficiency mixing method. SUMMARY

[0005] The purpose of the present application is to provide a kind of reinforced phase particles and aluminium matrix material particle high-efficiency mixing method to solve the problems existing in the prior art, realize the mixing of particles with good wetting combination, uniform distribution, smooth surface and high activity, and prepare ingot blank with uniform size, excellent performance and good interface combination.

[0006] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0007] The present application provides a kind of reinforced phase particles and aluminium matrix material particle high-efficiency mixing method, comprising the following steps:

[0008] Step one, the particle size ratio of reinforced phase particles and aluminium matrix material particles is designed;

[0009] The particle size D50 of the reinforced phase particles to the particle size D50 of the aluminium matrix material particles is 4:1 to 1:2; the particle size D90:D50 of the reinforced phase particles is 4:1 to 1.2:1, and the particle size D90:D50 of the aluminium matrix material particles is 5:1 to 1.2:1;

[0010] The reinforced phase particles account for 0% to 60% of the total mass of the particles, and are not 0%; the particle size D50 of the reinforced phase particles is 5-200 μm;

[0011] Step two, the designed proportion of the reinforcing phase particles and the aluminum matrix material particles are mixed in the equipment through different feeding ports;

[0012] Step three, the mixed particles obtained in step two are ultrasonically treated under a protective atmosphere to obtain pre-dispersed mixed particles;

[0013] Step four, a modifier is added to the mixed particles obtained in step three, and the system is subjected to staged heating while mixing, the first stage temperature is 50-150℃ (heating rate is 3-15℃ / min), and the second stage temperature is 150-300℃ (heating rate is 2-10℃ / min);

[0014] When the modifier is added, the stirring speed in the equipment is 10-200r / min.

[0015] The addition amount of the modifier is 0.5-6% of the mass of the mixed powder materials; the modifier is a non-toxic polymer with good water solubility.

[0016] Step five, after heating to the predetermined temperature, the equipment containing the mixed particles is rotated, and the mixed particles in the equipment are stirred, the rotation direction of the equipment is opposite to the stirring direction of the mixed particles. The mixing time in the first stage heating process is 2-10h, and the mixing time in the second stage heating process is 2-6h.

[0017] Further, the reinforcing phase particles are ceramic particles, and the aluminum matrix material particles include one or more of 2xxx, 4xxx, 6xxx and 7xxx aluminum alloy particles.

[0018] Further, in step two, when the reinforcing phase particles account for ≤30% of the total mass of the particles, the feeding speed of the aluminum matrix material particles is 0.5-7Kg / min, and the feeding speed of the reinforcing phase particles is 0.2-5Kg / min;

[0019] When the reinforcing phase particles account for more than 30% and less than or equal to 60% of the total mass of the particles, the feeding speed of the aluminum matrix material particles is 0.2-7Kg / min, and the feeding speed of the reinforcing phase particles is 0.5-7Kg / min.

[0020] The diameter of the feeding port of the reinforcing phase particles is 2-15mm, and the diameter of the feeding port of the aluminum matrix material particles is 5-25mm.

[0021] Further, in step three, the protective atmosphere is nitrogen, the gas flow of the protective atmosphere is 20-500ml / min, and the pressure is 0.05-0.5MPa.

[0022] Further, in step three, the frequency of the ultrasonic treatment is 50-120 KHZ, the output power is 30%-100%, and the ultrasonic time is 5-120 min.

[0023] Further, in step four, the flow rate of the modifier is 10-500 ml / min, and the modifier is added by means of intermittent liquid addition. Specifically, liquid is added for 1-3 min at a time, and liquid is added again every 10-30 s.

[0024] Further, in step five, the rotation speed of the device is 10-150 r / min, and the stirring speed of the mixed particles is 50-500 r / min.

[0025] Further, after the mixing in step five is completed, the method further comprises: step six, closing the external rotating device, reducing the internal rotation speed of the device, discharging, and packaging.

[0026] The application further provides the aluminum alloy powder obtained by the above mixing method.

[0027] The application provides a high-efficiency mixing method of reinforcing phase particles and aluminum matrix material powder, and the main processes and parameters of each step are described and specified to ensure the stability of the mixing powder quality.

[0028] The application has the following technical effects:

[0029] The application controls the relative particle size of the reinforcing phase and the aluminum matrix and controls the particle size of the reinforcing phase and the aluminum matrix separately, thereby ensuring the uniformity of the mixed powder and meeting the requirement of uniformity of the prepared material; the particle feeding parameters and ultrasonic pretreatment control are used to make the mixed particles uniform, dispersed, and pre-spheroidized; the rationalization control of the particle mixing process parameters in the whole process, including the feeding control, the discharging control, the rotation speed control, and the temperature rising rate control, is used to realize the particles with good wetting combination, uniform distribution, smooth surface, and high efficiency.

[0030] The mixing method of the application can realize uniform distribution of ingot blank organization, uniform size, excellent performance, and good interface combination. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0032] Figure 1 The process flow chart of the powder mixing method of the embodiment of the application is shown in the following figure.

[0033] Figure 2 Metallographic structure picture of the material prepared for Example 1 at 200X magnification;

[0034] Figure 3 Metallographic structure picture of the material prepared for Example 2 at 50X magnification;

[0035] Figure 4 Metallographic structure picture of the material prepared for Example 3 at 50X magnification. DETAILED DESCRIPTION

[0036] The detailed description set forth below of certain example embodiments of the application describes and discloses only the certain aspects and features of the present application, and is not intended to limit the scope of the application as it is described in the claims.

[0037] It should be understood that the terms used herein are for the purpose of describing particular embodiments and are not intended to limit the present application. Additionally, for a range of values of a parameter, unless otherwise stated, each intervening value by each intervening value, as well as each individual value of the recited range, is also specifically disclosed. In each instance, all the recited values from the described range and all the intervening values between the recited values are subsumed in the present application. The upper and lower limits of these intervening ranges can independently be included or excluded in the range.

[0038] Unless defined otherwise, 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 application belongs. Although preferred methods and materials are described, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present application. All documents mentioned herein are incorporated by reference to disclose and describe in detail the methods and / or materials which are related to the present application. In the case of conflict, the present specification will control.

[0039] Various modifications and changes can be made to the specific embodiments of the present application described herein without departing from the scope or spirit of the application. Other embodiments of the application will be apparent to those of ordinary skill in the art from the description and examples presented herein. The description and examples are illustrative of the application and are not intended to limit the scope of the application.

[0040] As used herein, the terms "comprises", "comprising", "includes", "including", "has", "having", "contains", "containing", or variations thereof, are intended to be open-ended terms that mean including, but not limited to.

[0041] Figure 1 Process flow diagram for the powder mixing method of the embodiments of the present application.

[0042] The application provides a method for efficiently mixing reinforcing phase particles and aluminum matrix material particles, which comprises the following steps.

[0043] S1, design of particle size ratio of reinforcing phase and aluminum matrix:

[0044] The reinforcing phase particles are ceramic particles; the aluminum matrix is 2xxx, 4xxx, 6xxx, 7xxx aluminum alloy, the ratio of the particle size (D50) of the ceramic particles to the particle size (D50) of the aluminum matrix is 4:1-1:2, the ratio of the particle size D90 of the ceramic particles to the particle size D50 is 4:1-1.2:1, and the ratio of the particle size D90 of the aluminum matrix to the particle size D50 is 5:1-1.2:1. The particle size D50 of the reinforcing phase particles is 5-200 microns.

[0045] S2, loading:

[0046] The particles with the designed ratio are respectively loaded into the coating modifier from different feeding ports on the upper sides of the hoppers at a certain feeding speed, so that the two are mixed. The diameter of the feeding port of the reinforcing phase particles is 2-15 mm, and the diameter of the feeding port of the aluminum matrix particles is 5-25 mm. When the mass fraction of the reinforcing phase is ≤30%, the feeding speed of the aluminum matrix particles is 0.5-7 Kg / min, and the feeding speed of the reinforcing phase particles is 0.2-5 Kg / min. When the mass fraction of the reinforcing phase particles is 30%-60%, the feeding speed of the aluminum matrix particles is 0.2-7 Kg / min, and the feeding speed of the reinforcing phase particles is 0.5-7 Kg / min.

[0047] S3, pre-dispersion:

[0048] After the loading is completed, the protective gas-nitrogen is opened, the purity is higher than 99.999%, the gas flow is 20-500 ml / min, the pressure is maintained at 0.05-0.5 MPa, and the ultrasonic dispersion is used. The ultrasonic frequency is 50-120 KHZ, the output power is 30%-100%, the ultrasonic time is 5-120 min, the reinforcing phase particle powder and the aluminum matrix particle powder are fully dispersed, and full pre-spheroidization is achieved.

[0049] S4, pre-mixing:

[0050] After the ultrasonic is completed, the modifier is added through the liquid inlet at a flow rate of 10-500 ml / min, the modifier is an industrial grade, the liquid is added intermittently, the liquid is added for 1-3 min at a time, and the liquid is added again every 10-30 s; the total liquid addition amount is 0.5-6% of the mass of the material. While the liquid is added, the low-speed blade is started, the speed is 10-200 r / min, the diameter of the blade is 200-600 mm, the temperature is increased from room temperature, and the temperature is increased in stages, the temperature in the first stage is 50-150 DEG C, the temperature in the second stage is 150-300 DEG C; the temperature increasing rate in the first stage is 3-15 DEG C / min, and the temperature increasing rate in the second stage is 2-10 DEG C / min.

[0051] S5, mixing:

[0052] When the temperature reaches the requirement, the blade speed is adjusted to 50-500 r / min, the external rotating mechanism of the bin is opened, the rotating speed is 10-150 r / min, the mixing time is 2-10 h in the first stage of temperature rising process, and the mixing time is 2-6 h in the second stage of temperature rising process. After the mixing is completed, the tap density is 1.8-2.0 g / cm 3 .

[0053] S6, discharging and packaging:

[0054] After the mixing is completed, the external rotating mechanism of the bin is closed, the blade speed is reduced to 20-250 r / min, the discharging is performed from the lower discharging port at a speed of 1-5 Kg / min, the discharging time is 5-30 min, and then vacuum packaging is performed.

[0055] Example 1

[0056] The embodiment provides a method for efficiently mixing reinforcing phase particles and aluminum matrix material particles, and the steps are as follows:

[0057] S1, design of particle size ratio of reinforcing phase and aluminum matrix:

[0058] The reinforcing phase particles are SiC particles; the aluminum matrix is 2009 aluminum alloy, the particle size (D50) ratio of the ceramic particles to the aluminum matrix particles is 3:1, the particle size D90:D50 of the ceramic particles is 1.2:1, and the particle size D90:D50 of the aluminum matrix particles is 1.2:1.

[0059] The particle size D50 of the reinforcing phase particles is 24 μm, and the particle size D50 of the aluminum matrix particles is 8 μm.

[0060] S2, charging:

[0061] The particles with the designed ratio are respectively charged into the coating modifier from different feeding ports on the upper two sides of the bin (the diameter of the reinforcing phase particle feeding port is 3 mm, and the diameter of the aluminum matrix particle feeding port is 10 mm), so that the two are mixed. The mass fraction of the reinforcing phase particles in the total particles is 10%, the feeding speed of the aluminum matrix particles is 1.5 Kg / min, and the feeding speed of the reinforcing phase particles is 0.5 Kg / min.

[0062] S3, pre-dispersion:

[0063] After the charging is completed, the protective gas-nitrogen with a purity of more than 99.999% is opened, the gas flow is 50 ml / min, the pressure is maintained at 0.05 MPa, and the ultrasonic vibration dispersion is used. The ultrasonic frequency is 60 KHZ, the output power is 40%, and the ultrasonic time is 15 min, so that the reinforcing phase particle powder and the aluminum matrix particle powder are fully dispersed and fully pre-spheroidized.

[0064] S4, premix:

[0065] After ultrasonic, the modifier is added through the liquid inlet at a flow rate of 50 ml / min, the modifier is an alcohol polymer, intermittent liquid addition, one time liquid addition 1 min, liquid addition every 10 s; the total liquid addition amount is 0.5% of the mass of the material. At the same time of liquid addition, the blade is started at low speed, the speed is 30 r / min, the blade diameter is 300 mm, the first stage temperature rising: the temperature is raised from room temperature to 150 DEG C, the temperature rising rate is 5 DEG C / min; the second stage temperature rising: the temperature is raised to 200 DEG C at a temperature rising rate of 2 DEG C / min.

[0066] S5, mixing:

[0067] When the modification agent is added and the temperature reaches the requirement, the blade speed is adjusted to 100 r / min, the external rotating mechanism outside the bin is started, the rotating speed is 30 r / min, the first stage temperature rising process mixing time is 3 h, the second stage temperature rising process mixing time is 2 h. After mixing is completed, the tap density is 1.8 g / cm 3 .

[0068] S6, discharging and packaging:

[0069] After mixing is completed, the external rotating mechanism outside the bin is closed, the blade speed is reduced to 50 r / min, the material is discharged from the lower discharge port at 1 Kg / min, the discharging time is 30 min, and the vacuum packaging can be carried out.

[0070] After mixing in this embodiment, the particles are uniformly mixed and combined, the tap density reaches 1.8 g / cm 3 , the prepared ingot blank has uniform tissue phase distribution and size, the strength reaches 450 MPa, the density reaches more than 99.8%, and the interface is well combined.

[0071] Figure 2 The metallographic structure picture of the material prepared in example 1 under 200X magnification.

[0072] Example 2

[0073] This embodiment provides a method for efficiently mixing reinforcing phase particles and aluminum matrix material particles, the steps are as follows:

[0074] S1, reinforcing phase and aluminum matrix particle size ratio design:

[0075] The reinforcing phase particles are SiC particles; the aluminum matrix is 4047 aluminum alloy, the ratio of ceramic particle size (D50) to aluminum matrix particle size (D50) is 2:1, the ceramic particle size D90:D50 is 3:1, and the aluminum matrix particle size D90:D50 is 4:1.

[0076] Reinforcing phase particle size D50 = 100 μm; aluminum matrix particle size D50 = 50 μm.

[0077] S2, charging:

[0078] The particles of the designed ratio were respectively loaded from different feeding ports on the upper two sides of the silo into the coating modification machine (reinforcing phase particle feeding port diameter: 5 mm, aluminum matrix particle feeding port diameter: 10 mm) to mix the two. Among them, the mass fraction of the reinforcing phase particles was 35%, the aluminum matrix particle feeding speed was 3.5 Kg / min, and the reinforcing phase particle feeding speed was 2 Kg / min.

[0079] S3, pre-dispersion:

[0080] After the feeding was completed, the protective gas-nitrogen with a purity of more than 99.999% was opened, the gas flow was 80 ml / min, the pressure was maintained at 0.1 MPa, and the ultrasonic dispersion was used. The ultrasonic frequency was 80 KHZ, the output power was 70%, the ultrasonic time was 25 min, the reinforcing phase particle powder and the aluminum matrix particle powder were fully dispersed, and the pre-spheroidization was fully performed.

[0081] S4, pre-mixing:

[0082] After the ultrasonic was completed, the modifier was added through the liquid inlet at a flow rate of 250 ml / min, the modifier was an alcohol polymer, the liquid was intermittently added, one time of liquid addition was 2 min, and the liquid was added every 18 S; the total liquid addition amount was 1.0% of the mass of the material. While adding the liquid, the low-speed blade was started, the speed was 70 r / min, the blade diameter was 400 mm, the first stage temperature rising: the temperature was raised from room temperature to 100℃ at a temperature rising rate of 5℃ / min; the second stage temperature rising: the temperature was raised to 180℃ at a temperature rising rate of 2℃ / min.

[0083] S5, mixing:

[0084] When the modifier was added and the temperature reached the requirement, the blade speed was adjusted to 250 r / min, the external rotating mechanism outside the silo was opened, the rotating speed was 60 r / min, the first stage temperature rising process mixing time was 4 h, and the second stage temperature rising process mixing time was 4 h. After the mixing was completed, the tap density was 1.87 g / cm 3 .

[0085] S6, discharging and packaging:

[0086] After the mixing was completed, the external rotating mechanism outside the silo was closed, the blade speed was reduced to 50 r / min, the discharging was performed from the lower discharging port at a speed of 0.8 Kg / min, the discharging time was 17 min, and the vacuum packaging was performed.

[0087] After the mixing was completed, the particles were uniformly mixed, the combination was good, and the tap density reached 1.87 g / cm 3The prepared ingot blank has uniform microstructure, uniform size, strength of 220 MPa, density of more than 99.9%, and good interface bonding.

[0088] Figure 3 The microstructure picture of the material prepared in Example 2 under 50X magnification is shown.

[0089] Example 3

[0090] The embodiment provides a method for efficiently mixing reinforcing phase particles and aluminum matrix material particles, and the steps are as follows:

[0091] S1, reinforcing phase and aluminum matrix particle size ratio design:

[0092] The reinforcing phase particles are boron carbide; the aluminum matrix is 6063 aluminum alloy, the ratio of the ceramic particle size (D50) to the aluminum matrix particle size (D50) is 1:1, the ceramic particle size D90:D50 is 4:1, and the aluminum matrix particle size D90:D50 is 5:1.

[0093] The reinforcing phase particle size D50 is 150 μm; the aluminum matrix particle size D50 is 150 μm.

[0094] S2, charging:

[0095] The particles with the designed ratio are respectively loaded into the coating modification machine (the reinforcing phase particle feeding port diameter is 15 mm, and the aluminum matrix particle feeding port diameter is 25 mm) from different feeding ports on the upper two sides of the hopper, so that the two are mixed. The mass fraction of the reinforcing phase particles is 60%, the aluminum matrix particle feeding speed is 4 Kg / min, and the reinforcing phase particle feeding speed is 3 Kg / min.

[0096] S3, pre-dispersion:

[0097] After the charging is completed, the protective gas-nitrogen with a purity of more than 99.999% is opened, the gas flow is 150 ml / min, the pressure is kept at 0.1 MPa, and the ultrasonic dispersion is used. The ultrasonic frequency is 120 KHZ, the output power is 100%, and the ultrasonic time is 60 min, so that the reinforcing phase particle powder and the aluminum matrix particle powder are fully dispersed and fully pre-spheroidized.

[0098] S4, pre-mixing:

[0099] After ultrasonic, the modifier is added through the liquid inlet at a flow rate of 400 ml / min, the modifier is an alcohol polymer, intermittent liquid addition, 3 min for one time, and liquid addition is performed every 30 s; the total liquid addition amount is 4% of the mass of the material. While the liquid is added, the blade is started at a low speed, the speed is 100 r / min, the blade diameter is 600 mm, the first stage temperature rising is that the temperature is raised to 120 DEG C from room temperature, and the temperature rising rate is 8 DEG C / min; the second stage temperature rising is that the temperature is raised to 250 DEG C at a temperature rising rate of 4 DEG C / min.

[0100] S5, mixing:

[0101] When the modifier is added and the temperature reaches the requirement, the blade speed is adjusted to 300 r / min, the external rotating mechanism outside the bin is started, the rotating speed is 80 r / min, the first stage temperature rising process mixing time is 7 h, and the second stage temperature rising process mixing time is 3 h. After mixing is completed, the tap density is 2.0 g / cm 3 .

[0102] S6, discharging and packaging:

[0103] After mixing is completed, the external rotating mechanism outside the bin is closed, the blade speed is reduced to 50 r / min, the material is discharged from the lower discharge port at 3 Kg / min, the discharging time is 10 min, and vacuum packaging can be performed.

[0104] After mixing is completed, the tap density is 2.0 g / cm 3 , the prepared ingot blank has uniform tissue phase distribution and size, the strength reaches 250 MPa, the density reaches more than 99.9%, and the interface is well combined.

[0105] Figure 4 The metallographic tissue picture of the material prepared in Example 3 under 50X magnification is shown.

[0106] Comparative Example 1

[0107] Different from Example 2, the particle size ratio is that the ratio of the reinforcing phase particle size D50 to the aluminum matrix material particle size D50 is 5:1.

[0108] After mixing, the particles are not uniform, the tap density is 1.75 g / cm 3 , the strength is 160 MPa, and the density is 97.5%.

[0109] Comparative Example 2

[0110] Different from Example 2, no premixing is performed.

[0111] After mixing, the particles are not uniform, the tap density is 1.8 g / cm 3, the intensity is 180MPa, the density is 98%.

[0112] The application realizes the particle mixing with good wetting combination, uniform distribution, smooth surface and high efficiency activity by pre-dispersing the reinforcing phase and the aluminum matrix particle powder, pre-spheroidizing the particle morphology, adding high-efficiency modifier, internal blade stirring in the bin and external rotation of the equipment, combining high temperature, ultrasonic and other means and controlling the precise process parameters in the whole process.

[0113] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A method for efficiently mixing reinforcing phase particles with aluminum matrix material particles, characterized in that, Includes the following steps: Step 1: Design the particle size distribution between the reinforcing phase particles and the aluminum matrix material particles; The ratio of the particle size D50 of the reinforcing phase to the particle size D50 of the aluminum matrix material is 4:1 to 1:2; the ratio of the particle size D90 to D50 of the reinforcing phase is 4:1 to 1.2:1; and the ratio of the particle size D90 to D50 of the aluminum matrix material is 5:1 to 1.2:

1. The reinforcing phase particles account for 0%-60% of the total particle mass, and are not 0%; the particle size of the reinforcing phase particles is D50 = 5-200 μm; Step 2: Mix the pre-designed ratio of reinforcing phase particles and aluminum matrix material particles in the equipment through different feed ports; Step 3: The mixed particles obtained in Step 2 are subjected to ultrasonic treatment under a protective atmosphere to obtain pre-dispersed mixed particles; Step 4: Add the modifier to the mixed particles obtained in Step 3. While mixing, heat the system in stages. The first stage temperature is 50-150℃, and the second stage temperature is 150-300℃. Step 5: After heating to the predetermined temperature, the equipment containing the mixed particles is rotated, and the mixed particles inside the equipment are stirred at the same time. The direction of the equipment's rotation is opposite to the direction of the mixing of the mixed particles.

2. The mixing method according to claim 1, characterized in that, The reinforcing phase particles are ceramic particles, and the aluminum matrix material particles include one or more of 2×××, 4×××, 6××× and 7××× aluminum alloy particles.

3. The mixing method according to claim 1, characterized in that, In step two, when the reinforcing phase particles account for ≤30% of the total particle mass, the feeding rate of the aluminum matrix material particles is 0.5-7 kg / min, and the feeding rate of the reinforcing phase particles is 0.2-5 kg / min; When the reinforcing phase particles account for more than 30% and less than or equal to 60% of the total particle mass, the feed rate of the aluminum matrix material particles is 0.2-7 kg / min, and the feed rate of the reinforcing phase particles is 0.5-7 kg / min.

4. The mixing method according to claim 1, characterized in that, In step three, the protective atmosphere is nitrogen, with a gas flow rate of 20-500 ml / min and a pressure of 0.05-0.5 MPa.

5. The mixing method according to claim 1, characterized in that, In step three, the frequency of the ultrasonic treatment is 50-120 kHz, and the ultrasonic time is 5-120 min.

6. The mixing method according to claim 1, characterized in that, In step four, the flow rate of the modifier is 10-500 ml / min.

7. The mixing method according to claim 1, characterized in that, In step five, the equipment rotation speed is 10-150 r / min; the mixing speed of the mixed particles is 50-500 r / min.

8. The mixing method according to claim 1, characterized in that, After mixing in step five, the process also includes step six: stopping the equipment's rotation, reducing the mixing speed of the mixed particles, discharging, and packaging.

9. The aluminum alloy powder obtained by the mixing method according to any one of claims 1-8.

Images