Amorphous alloy-reinforced copper-based composite coating and composite bulk material, and preparation method therefor

Abstract

An amorphous alloy-reinforced copper-based composite coating and composite bulk material, and a preparation method therefor. The amorphous alloy-reinforced copper-based composite coating and the amorphous alloy-reinforced copper-based composite bulk material both at least comprise copper powder, and amorphous alloy (Fe54.61Mo16.8Cr25.8C2.44Si0.35) powder, wherein the proportion of the copper powder ranges from 55% to 95%, and the proportion of the amorphous alloy (Fe54.61Mo16.8Cr25.8C2.44Si0.35) powder ranges from 5% to 45%. The thickness of the composite coating ranges from 300 μm to 2000 μm, and the composite bulk material has a centimeter-scale thickness, so that wear resistance and tensile strength can be improved while maintaining the high conductivity of copper.

Description

Amorphous alloy reinforced copper-based composite coating and composite block and preparation method thereof Technical Field

[0001] The present invention relates to the technical field of metal composite coatings and composite bulk materials, in particular to an amorphous alloy reinforced copper-based composite coating and composite bulk material and a preparation method thereof. Background Art

[0002] Cold spray technology uses a supersonic flow generated by heating and pressurizing low-temperature gas to accelerate the spray powder in a solid state to supersonic speeds. This causes the metal particles to impact the substrate, causing strong plastic deformation and deposition onto the surface to form a coating. Common cold spray techniques include low-pressure cold spray and high-pressure cold spray. However, due to the lower spray pressure, low-pressure cold spray is only suitable for depositing coatings with high plasticity, such as copper, aluminum, and zinc. Currently, cold spray technology is widely used in additive manufacturing, wear-resistant coatings, and anti-corrosion coatings.

[0003] In the existing technology, in the field of coating and additive manufacturing, people prepare pure metal single-element coatings and additives through cold spraying. Among them, pure copper coatings and additives are widely used. However, the materials produced have disadvantages such as poor wear resistance. In addition, during the spraying process, there will be more or less gaps remaining between the spraying particles, which not only affects the performance of the coating and additive, but also greatly reduces their service life.

[0004] After searching, it was found that a Chinese patent document discloses a copper-based composite powder for forming an iron-based amorphous reinforced copper-based alloy by laser selective melting (Publication No.: CN112643022A). The present invention discloses a copper-based composite powder for forming an iron-based amorphous reinforced copper-based alloy by laser selective melting. The copper-based composite powder is characterized by using a copper-based composite powder with a particle size of 40 to 50 μm as a forming material and adopting a laser selective melting forming method to prepare an iron-based amorphous reinforced copper-based alloy, wherein the copper-based composite powder is mainly composed of iron-based amorphous powder and copper alloy powder in a mass ratio of 1:9 to 1:7. The advantages of the present invention are that during the laser selective melting forming process, the copper-based composite powder undergoes liquid phase separation and self-assembles to form spherical amorphous iron particles, and the amorphous iron particles are dispersed in the copper-rich matrix; the iron-based amorphous reinforced copper-based alloy has excellent comprehensive properties such as high strength, high corrosion resistance, high wear resistance, and high thermal conductivity, but it still has the following defects:

[0005] Although the copper-based composite powder of the above-mentioned amorphous reinforced copper-based alloy has achieved the excellent comprehensive properties of the iron-based amorphous reinforced copper-based alloy such as high strength, high corrosion resistance, high wear resistance and high thermal conductivity, it still has the problem that during the spraying process, the laser heat is too high, which will cause the amorphous alloy to crystallize, thereby causing it to lose the original amorphous properties of the amorphous alloy.

[0006] A search revealed that a Chinese patent document discloses an in-situ endogenous amorphous particle reinforced copper alloy material (publication number: CN113061778A). The present invention relates to the design and preparation technology of copper alloys and composite materials thereof, and specifically to an in-situ endogenous amorphous particle reinforced copper alloy material. The material comprises alloying elements Cu and Ni (or Fe, Co), and alloying elements Nb, Ta, Sn, and B (or Si, B, C, Cr, Mo, Co, Ni, and Nb, Ta, B, Si, C, Nb, Fe, and Mo) added to promote the separation of Cu and Ni (or Fe, Co). During rapid cooling, the alloy melt first undergoes liquid phase decomposition to form two liquid phases: a Cu alloy and a Ni alloy (or an Fe alloy, a Co alloy). The matrix liquid phase Cu alloy and the second liquid phase Ni alloy (or an Fe alloy, a Co alloy) undergo crystallization and solidification and amorphous transformation, respectively, to form the in-situ endogenous amorphous particle reinforced copper alloy material. In the in-situ endogenous amorphous particle reinforced copper alloy material of the present invention, the reinforcing phase and the metal matrix have good interface bonding, the material has high density, and no brittle phase is generated at the interface. However, the following defects still exist:

[0007] Although the above-mentioned reinforced copper alloy material achieves good interface bonding between the reinforcement phase and the metal matrix, high material density, and no brittle phase is generated at the interface, it still has disadvantages such as poor wear resistance during the spraying process. In addition, during the spraying process, there will be more or less gaps remaining between the sprayed particles, which not only affects the performance of the coating and the additive, but also greatly reduces its service life.

[0008] Summary of the Invention

[0009] The purpose of the present invention is to provide an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, which solves the problem in the prior art in the background technology that in the coating and additive manufacturing, people prepare pure metal single-element coatings and additives by cold spraying, among which pure copper coatings and additives are widely used, but the materials produced have disadvantages such as poor wear resistance, and during the spraying process, there will be more or less gaps remaining between the spraying particles, which not only affects the performance of the coating and additive, but also greatly reduces its service life. The method has the advantages of simple method, short production cycle, low cost, mild reaction conditions, strong operability, and improving the wear resistance of the composite coating and composite block and the tensile strength of the composite block while maintaining the high conductivity of copper.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0011] An amorphous alloy reinforced copper-based composite coating and a composite block and a preparation method thereof, comprising an amorphous alloy reinforced copper-based composite coating and an amorphous alloy reinforced copper-based composite block, wherein the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block both comprise at least copper powder, an amorphous alloy (Fe54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 )pink.

[0012] Preferably, the ratio of copper powder included in the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block is 55% to 95%.

[0013] Preferably, the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block include the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder ratio is 5% to 45%.

[0014] Preferably, the copper powder particles and the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) The particle size of the powder is 20 to 50 μm.

[0015] A method for preparing an amorphous alloy reinforced copper-based composite coating and a composite block, comprising the following steps:

[0016] S1: First, copper powder particles and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) sieving the powder particles to a specified particle size;

[0017] S2: Then, copper powder, amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) Powder installation specified ratio;

[0018] S3: Then the copper powder and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder is put into a powder mixer;

[0019] S4: When copper powder, amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C2.44 Si 0.35 ) After the powder is completely mixed, the mixed powder is dried;

[0020] S5: Finally, the treated amorphous alloy reinforced copper-based composite coating and composite block are obtained;

[0021] Preferably, in S3, the powder mixer used is a V-shaped powder mixer, and the powder mixer used can also be a three-dimensional powder mixer or a two-dimensional powder mixer, and the mixing speed of the powder mixer is 150r / min to 300r / min, and the mixing time of the powder mixer is 30min to 90min.

[0022] Preferably, in said S4, the mixed copper powder and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder drying time is 2h to 6h, and the drying temperature is 40℃ to 80℃.

[0023] Preferably, in said S4, the processed copper powder and amorphous alloy mixed powder is obtained and input into a powder feeding system of a cold spraying system for spraying.

[0024] Preferably, the powder feeding system includes at least a receiving device, the receiving device is an aluminum alloy substrate, and the spraying distance of the spraying is preferably 20 mm to 40 mm;

[0025] The gas used for spraying in the cold spraying system is at least one of nitrogen, argon or helium. The spraying gas temperature is preferably 500° C. to 800° C., and the spraying gas pressure is preferably 3 MPa to 6 MPa.

[0026] Preferably, the receiving device needs to be pre-treated before use, and the pre-treatment includes at least sandblasting, ultrasonic cleaning and drying.

[0027] The air inlet pressure of the sandblasting treatment is 0.6 MPa to 0.8 MPa, and the pressure of the sandblasting treatment is preferably 0.2 MPa to 0.4 MPa;

[0028] The solvent used in the ultrasonic cleaning is ethanol or acetone, the frequency of the ultrasonic cleaning is 40kHz to 80kHz, and the time of the ultrasonic cleaning is 10min to 60min;

[0029] The drying device is preferably a compressed air dryer, the drying temperature is preferably 40° C. to 80° C., and the drying time is preferably 2 h to 6 h.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The spraying process used is the cold spray process. The biggest difference from the traditional thermal spray process is that the different degrees of particle heating lead to different states before they hit the workpiece surface. In the thermal spray process, the powder generally needs to be heated to a molten or semi-molten state. In the cold spray process, in order to achieve the acceleration effect of the particles, the accelerating gas is sometimes preheated, but the temperature is generally low, so that the powder particles remain in a solid state. At the same time, compared with thermal spray technology, cold spray technology has the advantages of high spraying rate and deposition efficiency, and the microstructure of the coating is consistent with the original material, which can avoid oxidation, phase change and other phenomena of the material. This has little thermal impact on the substrate. At the same time, the residual stress of the coating is compressive stress, which is suitable for the preparation of blocks with a certain shape and size. The coating has high bonding strength and low porosity, and is pollution-free to the environment. It is an environmentally friendly green spraying technology.

[0032] 2. Under the spraying temperature of the present invention, the amorphous alloy powder of the composite coating and the composite block will produce viscosity during the spraying process, and will deform arbitrarily when attached to the surface of the base, which can completely cover the gaps between the materials, making the material molding more complete, and Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 Iron-based amorphous alloys have the advantage of low cost.

[0033] 3. The preparation method provided is simple, has a short production cycle, low cost, mild reaction conditions, strong operability, is suitable for large-scale production, can reduce equipment investment and reduce risks in production.

[0034] 4. The thickness of the composite coating provided by the present invention is between 300 and 2000 μm, and the thickness of the composite block reaches the centimeter level. This material can improve the wear resistance of the composite coating and the composite block and the tensile strength of the composite block while maintaining the high conductivity of copper. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic diagram of a specific process of the amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof according to the present invention. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] Please refer to Figure 1, an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, including an amorphous alloy reinforced copper-based composite coating and an amorphous alloy reinforced copper-based composite block, characterized in that the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block both include at least copper powder, an amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 )pink.

[0039] The proportion of copper powder included in the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block is 55% to 95%.

[0040] Amorphous alloy reinforced copper-based composite coating and amorphous alloy reinforced copper-based composite bulk material include amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder ratio is 5% to 45%.

[0041] Amorphous alloy reinforced copper-based composite coating and copper powder particles and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) The particle size of the powder particles is 20 to 50 μm, more preferably 25 to 45 μm, and even more preferably 30 to 40 μm.

[0042] Example 2

[0043] Please refer to FIG1 , a method for preparing an amorphous alloy reinforced copper-based composite coating and a composite block, characterized in that it includes the following steps:

[0044] S1: First, copper powder particles and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) sieving the powder particles to a specified particle size;

[0045] S2: Then, copper powder, amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) Powder installation specified ratio;

[0046] S3: Then the copper powder and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder is put into a powder mixer;

[0047] S4: When copper powder, amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) After the powder is completely mixed, the mixed powder is dried;

[0048] S5: Finally, the treated amorphous alloy reinforced copper-based composite coating and composite block are obtained;

[0049] In S3, the powder mixer used is a V-type powder mixer, and the powder mixer used can also be a three-dimensional powder mixer or a two-dimensional powder mixer, and the mixing speed of the powder mixer is preferably 150r / min to 300r / min, more preferably 180r / min to 270r / min, more preferably 200r / min to 250r / min; the mixing time is preferably 30min to 90min, more preferably 40min to 80min, more preferably 50min to 70min.

[0050] In S4, the mixed copper powder, amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) The drying time is preferably 2 h to 6 h, more preferably 3 h to 5 h, more preferably 3.5 h to 4.5 h, and the drying temperature is preferably 40°C to 80°C, more preferably 50°C to 70°C, more preferably 55°C to 65°C.

[0051] In S5, the processed copper powder and amorphous alloy mixed powder is obtained and input into the powder feeding system of the cold spraying system for spraying. The spraying speed is preferably 20 / s to 80 mm / s, more preferably 30 / s to 70 mm / s, and more preferably 40 / s to 60 mm / s. The thickness of the sprayed composite coating is preferably 300 μm to 2000 μm, and the thickness of the composite block is preferably 0.8 cm to 1.2 cm.

[0052] The powder feeding system includes at least a receiving device, the receiving device is an aluminum alloy substrate, and the spraying distance is preferably 20 mm to 40 mm, more preferably 20 mm to 30 mm, and more preferably 20 mm to 25 mm;

[0053] The gas used for spraying in the cold spraying system is at least one of nitrogen, argon or helium. The spraying gas temperature is preferably 500°C to 800°C, and the spraying gas pressure is preferably 3MPa to 6MPa. Under the action of high-pressure gas, the mixed powder collides with the aluminum alloy substrate to cause plastic deformation, and then deposits on the surface of the aluminum alloy substrate to form a composite coating or composite block.

[0054] The receiving device needs to be pre-treated before use, which includes at least sandblasting, ultrasonic cleaning and drying;

[0055] By pre-treating the aluminum alloy substrate, the oxide film on the substrate surface can be removed, and the adhesion between the aluminum alloy substrate and the composite coating and composite bulk material can be increased. The coating has low porosity and is dense, which is conducive to the formation of high-quality composite coating and composite bulk material.

[0056] The air inlet pressure for sandblasting is 0.6 MPa to 0.8 MPa, more preferably 0.65 MPa to 0.75 MPa, more preferably 0.68 MPa to 0.72 MPa, and the pressure for sandblasting is preferably 0.2 MPa to 0.4 MPa, more preferably 0.25 MPa to 0.35 MPa, more preferably 0.27 MPa to 0.33 MPa;

[0057] The solvent used for ultrasonic cleaning is ethanol or acetone, the frequency of ultrasonic cleaning is 40kHz to 80kHz, more preferably 50kHz to 70kHz, more preferably 55kHz to 65kHz, and the time of ultrasonic cleaning is 10min to 60min, more preferably 15min to 40min, more preferably 20min to 30min;

[0058] The drying equipment is preferably a compressed air dryer, the drying temperature is preferably 40°C to 80°C, more preferably 50°C to 70°C, more preferably 55°C to 65°C, and the drying time is preferably 2h to 6h, more preferably 3h to 5h, more preferably 3.5h to 4.5h.

[0059] After spraying, the composite coating and the composite block are used directly or annealed before use, and the annealing temperature is preferably 435°C to 600°C, more preferably 450°C to 550°C, and more preferably 480°C to 500°C. The annealing time is selected based on the fact that the amorphous alloy does not crystallize at a specific annealing temperature, and is preferably 5 minutes to 30 minutes, more preferably 10 minutes to 25 minutes, and more preferably 15 minutes to 20 minutes.

[0060] Example 3

[0061] Please refer to FIG1 , an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, comprising the following steps:

[0062] Step 1: According to the composition ratio of the composite coating (ie the mass fraction of copper is 95%, the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) has a mass fraction of 5%);

[0063] Step 2: Place the above raw material powders with a particle size of 35 μm into a V-type powder mixer and mix them evenly at a speed of 250 r / min for 60 minutes;

[0064] Step 3: The mixed powder was then dried at 60°C for 4 h;

[0065] Step 4: sandblast the aluminum alloy substrate, set the air inlet pressure of the sandblasting to 0.7 MPa and the pressure of the sandblasting to 0.3 MPa;

[0066] Step 5: After completion, the sample was placed in an ethanol solvent and ultrasonically treated at 60 kHz for 25 min, and then dried at 60 ° C for 4 h;

[0067] Step 6: The dried powder is fed into the powder feeding system of the cold spray system and sprayed using nitrogen at a temperature of 600°C and a pressure of 4 MPa;

[0068] Step 7: Set the spray receiving device to the pre-treated aluminum alloy substrate, control the spraying distance to 22mm, and the travel speed to 50mm / s;

[0069] Step 8: Finally, a composite coating material with a thickness of 800 μm is obtained.

[0070] Table 1 is the performance test results of the copper-based composite coating of Example 3

[0071] Example 4

[0072] Please refer to FIG1 , an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, comprising the following steps:

[0073] Step 1: According to the composition ratio of the composite coating (the mass fraction of copper is 85%, the mass fraction of amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) with a mass fraction of 15%), of which the copper particle size is 30 μm, and the amorphous alloy (Fe 54.61 Mo16.8 Cr 25.8 C 2.44 Si 0.35 ) particle size is 33 μm;

[0074] Step 2: Place the above raw material powders into a three-dimensional powder mixer and mix them evenly at a speed of 200 r / min for 70 minutes;

[0075] Step 3: The mixed powder was then dried at 50°C for 5 h;

[0076] Step 4: sandblast the aluminum alloy substrate, set the air inlet pressure of the sandblasting to 0.75 MPa and the pressure of the sandblasting to 0.32 MPa;

[0077] Step 5: Place in acetone solvent and ultrasonicate at 65kHz for 20min, then dry at 55℃ for 4.5h;

[0078] Step 6: The dried powder is fed into the powder feeding system of the cold spray system and sprayed using nitrogen at a temperature of 600°C and a pressure of 4.5 MPa;

[0079] Step 7: Set the spray receiving device to the pre-treated aluminum alloy substrate, control the spraying distance to 22mm, and the travel speed to 50mm / s;

[0080] Step 8: Finally, a composite coating material with a thickness of 1000 μm is obtained.

[0081] Table 2 is the performance test results of the copper-based composite coating of Example 4

[0082] Example 5

[0083] Please refer to FIG1 , which shows an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, comprising the following steps:

[0084] Step 1: According to the composition ratio of the composite coating (the mass fraction of copper is 75%, the mass fraction of amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) has a mass fraction of 25%);

[0085] Step 2: Place the above raw material powders with a particle size of 35 μm into a three-dimensional powder mixer, mix them evenly at a speed of 200 r / min for 55 minutes, and then dry the mixed powder at 65°C for 3 hours;

[0086] Step 3: sandblast the aluminum alloy substrate, set the air inlet pressure of the sandblasting to 0.67 MPa and the pressure of the sandblasting to 0.29 MPa;

[0087] Step 4: After completion, place the sample in ethanol solvent and ultrasonicate at 55 kHz for 30 min, then dry at 65 °C for 3.5 h;

[0088] Step 5: The dried powder is fed into the powder feeding system of the cold spray system and sprayed using nitrogen at a temperature of 600°C and a pressure of 5 MPa;

[0089] Step 6: Set the spray receiving device to the pre-treated aluminum alloy substrate, control the spraying distance to 20 mm, and the travel speed to 50 mm / s;

[0090] Step 7: Finally, a composite coating material with a thickness of 1100 μm is obtained.

[0091] Table 3 is the performance test results of the copper-based composite coating of Example 5

[0092] Example 6

[0093] Please refer to FIG1 , an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, comprising the following steps:

[0094] Step 1: According to the composition ratio of the composite coating (the mass fraction of copper is 65%, the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) with a mass fraction of 35%), of which the copper particle size is 30 μm, and the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) particle size is 33 μm;

[0095] Step 2: Place the raw material powders into a two-dimensional powder mixer and mix them evenly at a speed of 20 r / min for 70 min, then dry the mixed powder at 50°C for 5 h;

[0096] Step 3: The copper base is sandblasted, and the air inlet pressure of the sandblasting is set to 0.75MPa and the pressure of the sandblasting is set to 0.32MPa;

[0097] Step 4: After completion, place the sample in acetone solvent and ultrasonicate at 65kHz for 20min, then dry at 55℃ for 4.5h;

[0098] Step 5: The dried powder is fed into the powder feeding system of the cold spray system and sprayed using argon gas at a temperature of 600°C and a pressure of 4 MPa;

[0099] Step 6: Set the spray receiving device to the pre-treated copper base, control the spraying distance to 22mm, and the walking speed to 50mm / s;

[0100] Step 7: Finally, a composite coating material with a thickness of 600 μm is obtained.

[0101] Table 4 is the performance test results of the copper-based composite coating of Example 6

[0102] Example 7

[0103] Please refer to FIG1 , an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, comprising the following steps:

[0104] Step 1: According to the composition ratio of the composite block (the mass fraction of copper is 75%, the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) has a mass fraction of 25%);

[0105] Step 2: Place the above raw material powders with a particle size of 35 μm into a three-dimensional powder mixer, mix them evenly at a speed of 200 r / min for 55 minutes, and then dry the mixed powder at 65°C for 3 hours;

[0106] Step 3: sandblast the aluminum alloy substrate, set the air inlet pressure of the sandblasting to 0.67 MPa and the pressure of the sandblasting to 0.29 MPa;

[0107] Step 4: After completion, place the sample in ethanol solvent and ultrasonicate at 55 kHz for 30 min, then dry at 65 °C for 3.5 h;

[0108] Step 5: The dried powder is fed into the powder feeding system of the cold spray system and sprayed using nitrogen at a temperature of 600°C and a pressure of 4 MPa;

[0109] Step 6: Set the spray receiving device to the pre-treated aluminum alloy substrate, control the spraying distance to 20 mm, and the travel speed to 50 mm / s;

[0110] Step 7: Finally, a composite block with a thickness of 1 cm is obtained.

[0111] Table 5 is the performance test results of the copper-based composite block material of Example 7

[0112] Example 8

[0113] Please refer to FIG1 , an amorphous alloy reinforced copper-based composite coating and composite block and a preparation method thereof, comprising the following steps:

[0114] Step 1: According to the composition ratio of the composite block (the mass fraction of copper is 75%, the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) has a mass fraction of 25%);

[0115] Step 2: Place the above raw material powders with a particle size of 35 μm into a three-dimensional powder mixer, mix them evenly at a speed of 200 r / min for 55 minutes, and then dry the mixed powder at 65°C for 3 hours;

[0116] Step 3: sandblast the aluminum alloy substrate, set the air inlet pressure of the sandblasting to 0.67 MPa and the pressure of the sandblasting to 0.29 MPa;

[0117] Step 4: After completion, place the sample in ethanol solvent and ultrasonicate at 55 kHz for 30 min, then dry at 65 °C for 3.5 h;

[0118] Step 5: The dried powder is fed into the powder feeding system of the cold spray system and sprayed using nitrogen at a temperature of 600°C and a pressure of 4 MPa;

[0119] Step 6: Set the spray receiving device to the pre-treated aluminum alloy substrate, control the spraying distance to 20 mm, and the travel speed to 50 mm / s;

[0120] Step 7: Finally, a composite block with a thickness of 1 cm is obtained.

[0121] In step seven, the obtained composite block was annealed at 500° C. for 15 min, and the performance of the composite block was tested. The results are shown in Table 6.

[0122] Table 6 is the performance test results of the copper-based composite block material of Example 8

[0123] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An amorphous alloy reinforced copper-based composite coating and composite block, comprising an amorphous alloy reinforced copper-based composite coating and an amorphous alloy reinforced copper-based composite block, characterized in that: The amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block both comprise at least copper powder and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder.

2. The amorphous alloy reinforced copper-based composite coating and composite block according to claim 1, wherein: The proportion of copper powder included in the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block is 55% to 95%.

3. The amorphous alloy reinforced copper-based composite coating and composite block according to claim 1, characterized in that: The proportion of the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder in the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block is 5% to 45%.

4. The amorphous alloy reinforced copper-based composite coating and composite block according to claim 1, characterized in that: The copper powder particles and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder particles included in the amorphous alloy reinforced copper-based composite coating and the amorphous alloy reinforced copper-based composite block have a particle size of 20 to 50 μm.

5. Applied to the preparation method of an amorphous alloy reinforced copper-based composite coating and composite block as described in claims 1-4, characterized in that It includes the following steps: S1: First, screen the copper powder particles and the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder particles to a specified particle size; S2: Secondly, mix the copper powder and the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder in accordance with the specified ratio of the composite coating; S3: Then put the proportioned copper powder and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder into the powder mixer; S4: When the copper powder and the amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powders are completely mixed, dry the mixed powder; S5: Finally, the processed amorphous alloy reinforced copper-based composite coating and composite block are obtained; 6. The preparation method of an amorphous alloy reinforced copper-based composite coating and composite block according to claim 5, characterized in that: In the S3, a V-type powder mixer is used, and the powder mixer used can also be a three-dimensional powder mixer or a two-dimensional powder mixer. The mixing speed of the powder mixer is 150 r / min to 300 r / min, and the mixing time of the powder mixer is 30 min to 90 min.

7. A method for preparing an amorphous alloy reinforced copper-based composite coating and composite block according to claim 5, characterized in that: In the step S4, the drying time of the mixed copper powder and amorphous alloy (Fe 54.61 Mo 16.8 Cr 25.8 C 2.44 Si 0.35 ) powder is 2 h to 6 h, and the drying temperature is 40°C to 80°C.

8. A method for preparing an amorphous alloy reinforced copper-based composite coating and composite block according to claim 5, characterized in that: In the S4, the processed copper powder and amorphous alloy mixed powder are obtained and input into the powder feeding system of the cold spraying system for spraying.

9. A method for preparing an amorphous alloy reinforced copper-based composite coating and a composite block according to claim 8, characterized in that: The powder feeding system at least includes a receiving device, the receiving device is an aluminum alloy substrate, and the spraying distance is preferably 20 mm to 40 mm; The gas used for spraying in the cold spraying system is at least one of nitrogen, argon or helium. The temperature of the spraying gas is preferably 500 °C to 800 °C, and the pressure of the spraying gas is preferably 3 MPa to 6 MPa.

10. A method for preparing an amorphous alloy reinforced copper-based composite coating and composite block according to claim 9, characterized in that: The receiving device needs to be pretreated before use. The pretreatment at least includes sandblasting treatment, ultrasonic cleaning treatment and drying treatment; The intake pressure of the sandblasting treatment is 0.6 MPa to 0.8 MPa, and the pressure of the sandblasting treatment is preferably 0.2 MPa to 0.4 MPa; The solvent used for ultrasonic cleaning is one of ethanol or acetone. The frequency of ultrasonic cleaning is 40 kHz to 80 kHz, and the time of ultrasonic cleaning is 10 min to 60 min; The equipment for drying is preferably a compressed air dryer. The temperature of drying is preferably 40 °C to 80 °C, and the time of drying is preferably 2 h to 6 h.

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