A multiphase composite reinforced copper alloy powder for laser additive manufacturing, its preparation method and application

Abstract

This invention discloses a multiphase composite reinforced copper alloy powder for laser additive manufacturing, its preparation method, and its application. The multiphase composite reinforced copper alloy powder comprises the following components by mass percentage: Cr: 0.10–2.13%; Nb: 0.09–1.90%; Ti: 0.47–1.03%; N: 0.13–0.30%, with the balance being Cu and unavoidable impurities. This invention, through rational design of the copper alloy powder composition and the addition of low-solid-solution components, generates a reinforcing phase through in-situ reaction using a gas atomization method, preparing a copper alloy powder with high laser absorption rate. This powder is then applied to laser additive manufacturing to obtain copper alloy formed parts. These formed parts exhibit excellent laser absorption rate, thermal conductivity, and high-temperature performance, and can be used in the preparation of aerospace engine materials.

Description

Technical Field

[0001] This invention relates to a multiphase composite reinforced copper alloy powder for laser additive manufacturing, its preparation method and application, and particularly to a multiphase composite reinforced copper alloy powder for aerospace engine materials, its preparation method and application, belonging to the field of aerospace engine materials technology. Background Technology

[0002] Copper alloys and copper-based composites have become the primary materials for key components of aerospace vehicle engines due to their ability to appropriately balance thermal conductivity, mechanical properties, fatigue life, and economic considerations. To achieve high-efficiency heat transfer, structural components of aerospace vehicle engines, such as combustion chambers, nozzles, and heat exchangers, often feature complex, irregularly shaped heat exchange structures, such as internal cooling channels or elongated through-holes. This makes traditional manufacturing processes extremely complex, encompassing traditional forging, casting, machining, heat treatment, and welding techniques, as well as newer technologies such as laser processing, electron beam processing, superplastic forming, and coating, resulting in long production cycles. The use of laser additive manufacturing, with its high degree of design freedom, enables the convenient and rapid high-precision forming of complex parts, providing a new approach for optimizing the structural design and iterating efficient technologies of aerospace engines.

[0003] However, the widespread application of additive manufacturing of copper alloys in aerospace engines still faces challenges. Pure copper and copper alloys have low laser absorption rates, requiring higher energy to melt the powder, resulting in a narrow processing window that confines the process to a region of high laser power and low scanning speed. With my country's goal of "developing its aerospace industry and building a strong aerospace nation," the operating conditions of launch vehicle engines are becoming increasingly harsh, such as combustion chamber temperatures reaching 3600K and nozzle throat heat flux densities of 164MW / m³. 2 This places even greater emphasis on the extreme performance requirements of new materials and core engine components, as the performance of traditional copper alloys is no longer sufficient. Current conventional methods for addressing these issues include adding large amounts of alloying elements, powder surface modification, and the addition of ceramic particles. Adding large amounts of alloying elements improves laser absorption, and while it also increases strength to some extent, it affects electrical and thermal conductivity. Powder chemical surface modification improves laser absorption, but it easily introduces defects and is a complex and costly process. Adding ceramic particles as a reinforcing phase results in poor interfacial bonding between the reinforcing phase and the matrix, affecting the material's mechanical properties and electrical and thermal conductivity. These methods have limitations in simultaneously achieving high laser absorption, high thermal conductivity, and high-temperature performance in copper alloy powders.

[0004] Therefore, this invention proposes a multiphase composite reinforced copper alloy powder for aerospace engine materials and its preparation method to meet the needs of copper alloy additive manufacturing in the aerospace field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the first objective of this invention is to provide a multiphase composite reinforced copper alloy powder for laser additive manufacturing. This multiphase composite reinforced copper alloy powder, by adding an appropriate amount of alloy with low solid solubility to copper, exhibits excellent laser absorption rate, thermal conductivity, high-temperature performance, and printability, making it particularly suitable for laser additive manufacturing.

[0006] The second objective of this invention is to provide a method for preparing multiphase composite reinforced copper alloy powder for laser additive manufacturing. This method utilizes the synergistic effect of copper and low-solid-solution components, combined with in-situ formation of reinforced particles through gas atomization in a special atomizing atmosphere, to prepare copper alloy powder with excellent laser absorption rate and printability.

[0007] The third objective of this invention is to provide an application of multiphase composite reinforced copper alloy powder for laser additive manufacturing. When applied to the preparation of copper alloy forming parts by laser additive manufacturing, high-density dislocation channels can be introduced into the copper alloy, and the resulting forming parts have high strength, excellent thermal conductivity and high-temperature performance.

[0008] To achieve the above-mentioned technical objectives, the present invention provides a multiphase composite reinforced copper alloy powder for laser additive manufacturing, comprising the following components by mass percentage: Cr: 0.10-2.13%; Nb: 0.09-1.90%; Ti: 0.47-1.03%; N: 0.13-0.30%; with the balance being Cu and unavoidable impurities.

[0009] Because pure copper has a low laser absorption rate, kilowatt-level lasers are often required for laser additive manufacturing. This invention addresses this by adding alloying components Ti, Cr, and Nb with low solid solubility to Cu, reducing electron scattering by dissolved atoms and thus improving the electrical and thermal conductivity of the copper alloy. Furthermore, by rationally designing the mass percentage of each component, the alloy powder exhibits excellent laser absorption rate, thermal conductivity, high-temperature performance, and printability. This invention requires strict control of the mass percentage of each component. Excessive Cr will result in a large amount of it dissolving in the matrix, affecting the alloy's electrical and thermal conductivity. Nb, due to its melting point, will prevent the melting process if excessive. Moreover, when both Cr and Nb exceed their respective mass percentage ranges, a large amount of Cr2Nb forms before the molten metal enters the nozzle during powder preparation, easily causing clogging and making powder preparation difficult. Additionally, some Cr2Nb in the prepared powder exists as fine, isolated particles, which agglomerate during printing and are difficult to disperse, ultimately affecting the performance of the formed part. When the mass percentage of these two components is too low, fewer or no precipitates are formed, failing to improve the room temperature and high temperature mechanical properties of the alloy. Furthermore, an appropriate amount of Ti can capture O in situ during the printing process, forming Ti-rich oxides and reducing the oxygen content in the Cu matrix. This is beneficial for improving the strength, electrical and thermal conductivity of the profile. However, excessive Ti content can increase the oxygen content in the alloy, hindering the achievement of a good balance between strength and plasticity. In addition, the introduction of nitrogen through a nitrogen-argon mixed gas allows for an appropriate amount of nitrogen in the alloy to react in situ with Ti to form TiN, acting as a reinforcement. This further enhances the strength of the copper alloy while maintaining excellent electrical and thermal conductivity.

[0010] Further preferred alloy composition: Cr: 1.48–1.80%; Nb: 1.32–1.61%; Ti: 0.56–0.65%; N: 0.16–0.19%; balance: Cu and unavoidable impurities. Alloys within this range exhibit superior overall performance in terms of thermal conductivity, tensile strength, and high-temperature tensile strength.

[0011] As a preferred embodiment, the mass ratio of Cr to Nb is 1.0 to 1.2:1. In this invention, the mass ratio of Cr to Nb directly affects the melting process and the performance of the formed parts. If the mass ratio of Cr to Nb exceeds the range, the Cr content is too high, and a large amount of Cr dissolves in the matrix, affecting the conductivity of the alloy; conversely, if the mass ratio of Cr to Nb is below the range, the Nb content is too high, and excessive Nb, due to its high melting point, is difficult to melt during melting. A further preferred embodiment is a mass ratio of Cr to Nb of 1.11 to 1.13:1.

[0012] As a preferred embodiment, the impurities comprise O and Fe; the O content is less than 500 ppm and the Fe content is less than 50 ppm. In this invention, by using a high-purity inert gas during atomization, controlling the purity of the raw materials to above 99.98%, and selecting zirconium oxide or magnesium oxide crucibles, the O and Fe content in the copper alloy impurities can be effectively reduced. In this invention, excessively high O and Fe contents will lead to a decrease in the electrical and thermal conductivity of the alloy.

[0013] The second objective of this invention is to provide a method for preparing multiphase composite reinforced copper alloy powder for laser additive manufacturing. This method involves preparing the raw materials in a designed ratio and then atomizing them in a nitrogen-containing atomizing atmosphere to obtain the powder.

[0014] The key to the technical solution of this invention lies in the following: by using a reasonable ratio of Cu and low solid solubility components, the strengthening phase TiN is formed in situ through gas atomization in a nitrogen-containing atomizing atmosphere. At the same time, the nitrogen-containing atomizing atmosphere can induce Ti, Cr and Nb to diffuse to the surface, so that the pre-alloyed powder prepared has a high laser absorption rate, which can be formed at a lower power, making it particularly suitable for laser additive manufacturing.

[0015] As a preferred embodiment, the gas atomization is one of vacuum induction melting gas atomization (VIGA), electrode induction melting gas atomization (EIGA), and plasma rotating electrode gas atomization (PREP).

[0016] As a preferred embodiment, the nitrogen-containing atomizing atmosphere is a mixture of nitrogen and argon; the volume ratio of nitrogen to argon is 1:3 to 5. This invention utilizes a nitrogen-containing atomizing atmosphere, which promotes the in-situ formation of TiN reinforcing particles during powder atomization. These particles are nanoscale in size, resulting in finer and more uniformly dispersed TiN particles compared to those prepared by external methods, with a cleaner interface. This enhances the alloy's strength without compromising its electrical and thermal conductivity. If the volume of nitrogen in the mixed gas is too high, the formed TiN reinforcing particles will be larger and less uniform, and are more likely to form the harmful NbN phase with Nb. Conversely, if the volume of nitrogen in the mixed gas is too low, the TiN content in the reinforcing particles formed in the copper alloy will be insufficient, leading to low strength in the prepared copper alloy.

[0017] As a preferred embodiment, the gas atomization temperature is 1720–1800°C.

[0018] This invention also provides an application of multiphase composite reinforced copper alloy powder for laser additive manufacturing, which is used to prepare copper alloy shaped parts. Since the multiphase composite reinforced copper alloy powder has a high copper alloy laser absorption rate, it can be formed at a lower power, making it particularly suitable for laser additive manufacturing.

[0019] As a preferred embodiment, the laser additive manufacturing conditions are as follows: laser power of 70-150W, scanning speed of 650-1200mm / s, printing spacing of 0.8-1.0mm, and powder layer thickness of 30-45μm.

[0020] Further preferred, the laser additive manufacturing conditions are: 100-130W, and a scanning speed of 900-1100mm / s.

[0021] As a preferred embodiment, after application in laser additive manufacturing, a forming process and an aging process are performed sequentially; the aging process is a single-stage aging process or a two-stage aging process. A two-stage aging process is more preferred.

[0022] By forming copper alloy powder through laser additive manufacturing, a supersaturated solid solution and a high-density dislocation structure can be formed. This is beneficial for solid solution elements to use dislocations as nucleation channels during aging treatment, precipitating Cr2Nb and Cu4Ti nano-reinforcing phases, making the matrix close to pure Cu. The resulting composite copper alloy formed parts have high strength and thermal conductivity.

[0023] As a preferred embodiment, the conditions for the single-stage aging treatment are: a holding temperature of 580–630°C and a holding time of 1–3 hours.

[0024] As a preferred embodiment, the conditions for the two-stage aging treatment are as follows: the first-stage insulation temperature is 320–380℃, the first-stage insulation time is 1–2 hours, the second-stage insulation temperature is 500–550℃, and the second-stage insulation time is 1–2 hours.

[0025] Compared with existing technologies, the beneficial technical effects of the present invention are as follows:

[0026] 1) In terms of composition design, this invention adds alloying elements Ti, Cr and Nb with low solid solubility in Cu, with solid solubility of 0.5%, 0.65% and 0.1% respectively, to reduce the scattering of electrons by solid solution atoms, thereby improving electrical and thermal conductivity.

[0027] 2) This invention induces Ti, Cr and Nb to diffuse to the surface through the atomization atmosphere of nitrogen-argon mixed gas, which improves the laser absorption rate of copper alloy, enabling it to be formed at lower power. Its wide process range and high-quality forming characteristics make it suitable for low-energy industrial production.

[0028] 3) This invention designs a nitrogen-containing atomization atmosphere, which promotes the in-situ formation of TiN reinforcing particles during powder atomization. These particles are nanoscale in size, resulting in finer, more uniform dispersion and a cleaner interface compared to external addition methods. This not only improves the strength of the alloy but also does not impair its electrical and thermal conductivity.

[0029] 4) This invention incorporates Ti elements to capture O in situ during the printing process, generating Ti-rich oxides and reducing the oxygen content in the Cu matrix, which is beneficial for improving strength, electrical conductivity, and thermal conductivity.

[0030] 5) This invention forms a supersaturated solid solution by additive manufacturing with high cooling rate, introduces high-density dislocations as nucleation channels for precipitated phases, and ages and precipitates Cr2Nb and Cu4Ti nano-reinforcing phases, making the matrix close to pure Cu, thereby improving the strength and thermal conductivity of the alloy.

[0031] 6) The alloy provided by this invention is particularly suitable for laser additive manufacturing. The copper forming parts obtained by laser additive manufacturing have excellent thermal conductivity and high temperature performance, with a thermal conductivity ≥360W / M·K and a tensile strength ≥190MPa at 750℃. Attached Figure Description

[0032] Figure 1 The image shows the cross-sectional morphology of the copper alloy powder prepared in Example 5; it can be seen from the image that the copper alloy powder has high sphericity.

[0033] Figure 2 The elemental distribution of Cr, Nb, Ti, and N in the copper alloy powder prepared in Example 5 is shown in the figure. Figure 1 The area within the yellow dashed box indicates that this invention successfully prepared a copper alloy containing Cr, Nb, Ti, and N. Detailed Implementation

[0034] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0035] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0036] Unless otherwise specified, all reagents and raw materials used in this invention are commercially available products or products that can be prepared by known methods.

[0037] Example 1

[0038] The multiphase composite reinforced copper alloy powder in this embodiment is composed of the following components by mass percentage: 2.13% Cr, 1.90% Nb, 0.47% Ti, 0.13% N, and 95.37% Cu.

[0039] The preparation of multiphase composite reinforced copper alloy powder and molded parts in this embodiment is as follows:

[0040] Powder preparation: The powder was prepared by mass percentage of 2.13% Cr, 1.90% Nb, 0.47% Ti, and 95.37% Cu, with a total weight of approximately 20 kg. VIGA technology was used for gas atomization powder preparation. The atomization atmosphere was a nitrogen-argon mixture, ensuring a nitrogen-argon volume ratio of 1:4. The atomization temperature was 1720℃. The powder was then sieved through a 270-mesh sieve to obtain copper alloy powder (0.13% N, O less than 500 ppm, Fe less than 50 ppm).

[0041] Printing and forming: The laser additive manufacturing technology used is laser powder bed fusion technology. The forming process parameters are set as follows: laser power is 125w, scanning speed is 1000mm / s, printing pitch is 0.8mm, and powder layer thickness is 35μm.

[0042] Two-stage aging treatment: The formed part is placed in a vacuum heat treatment furnace, heated to 380°C, held for 1 hour, then heated to 525°C, held for 1 hour, and cooled with the furnace.

[0043] Example 2

[0044] The only difference between this embodiment and Embodiment 1 is that the mass percentage meter is composed of the following components: 0.10% Cr, 0.09% Nb, 1.03% Ti, 0.30% N, and 98.48% Cu, with all other conditions being the same.

[0045] Example 3

[0046] The only difference between this embodiment and Embodiment 1 is that the mass percentage meter is composed of the following components: 1.80% Cr, 1.61% Nb, 0.56% Ti, 0.16% N, and 95.87% Cu, with all other conditions being the same.

[0047] Example 4

[0048] The only difference between this embodiment and Embodiment 1 is that the mass percentage meter is composed of the following components: 1.48% Cr, 1.32% Nb, 0.65% Ti, 0.19% N, and 96.36% Cu, with all other conditions remaining the same.

[0049] Example 5

[0050] The only difference between this embodiment and Embodiment 1 is that the mass percentage meter is composed of the following components: 1.64% Cr, 1.47% Nb, 0.60% Ti, 0.17% N, and 96.12% Cu, with all other conditions being the same.

[0051] Example 6

[0052] The only difference between this embodiment and embodiment 5 is that the aging treatment adopts a single-stage aging treatment: the molded part is placed in a vacuum heat treatment furnace, heated to 600°C, held for 1.5 hours, and cooled with the furnace, while the other conditions are the same.

[0053] Example 7

[0054] The only difference between this embodiment and embodiment 5 is that EIGA is used for gas atomization powder production, the atomization atmosphere is a nitrogen-argon mixture, the nitrogen-argon volume ratio is 1:4, and the atomization temperature is 1720℃, while the other conditions are the same.

[0055] Example 8

[0056] The only difference between this embodiment and Embodiment 5 is that PREP is used for gas atomization powder production, the atomization atmosphere is a nitrogen-argon mixture, the nitrogen-argon volume ratio is 1:4, and the atomization temperature is 1720℃, while the other conditions are the same.

[0057] Comparative Example 1

[0058] The difference between this comparative example and Example 5 is that the amount of Cr is excessive, and the composition by mass percentage is as follows: 3% Cr, 1.47% Nb, 0.60% Ti, 0.17% N, and 94.76% Cu, with all other conditions being the same.

[0059] Comparative Example 2

[0060] The difference between this comparative example and Example 5 is that the amount of Nb is excessive, and the composition by mass percentage is as follows: 1.64% Cr, 2.5% Nb, 0.60% Ti, 0.17% N, and 95.09% Cu, with all other conditions being the same.

[0061] Comparative Example 3

[0062] The difference between this comparative example and Example 5 is that the amounts of Ti and N are excessive, and the composition by mass percentage is as follows: 1.64% Cr, 1.47% Nb, 1.5% Ti, 0.44% N, and 94.95% Cu, with all other conditions being the same.

[0063] Comparative Example 4

[0064] The difference between this comparative example and Example 5 is that Cr is not added, and it consists of the following components by mass percentage: 1.47% Nb, 0.60% Ti, 0.17% N, and 96.23% Cu, with all other conditions being the same.

[0065] Comparative Example 5

[0066] The difference between this comparative example and Example 5 is that Nb is not added, and the composition by mass percentage is: 1.64% Cr, 0.60% Ti, 0.17% N, and 97.59% Cu.

[0067] Comparative Example 6

[0068] The difference between this comparative example and Example 5 is that Ti is not added, and the composition by mass percentage is as follows: 1.64% Cr, 1.47% Nb, 0.17% N, and 96.72% Cu, with all other conditions being the same.

[0069] Comparative Example 7

[0070] The only difference between this comparative example and Example 5 is that the atomizing atmosphere is pure argon gas, while the other conditions are the same.

[0071] Comparative Example 8

[0072] The only difference between this comparative example and Example 5 is that the nitrogen-argon volume ratio in the atomized atmosphere is 1:1, while all other conditions are the same.

[0073] Comparative Example 9

[0074] The only difference between this comparative example and Example 5 is that the mass ratio of Cr to Nb is adjusted to 2:1, and the composition by mass percentage is: 2% Cr, 1% Nb, 0.60% Ti, 0.17% N, and 96.23% Cu, with all other conditions remaining the same.

[0075] Comparative Example 10

[0076] The only difference between this comparative example and Example 5 is that the mass ratio of Cr to Nb is adjusted to 0.27:1, and the composition by mass percentage is as follows: 0.5% Cr, 1.8% Nb, 0.60% Ti, 0.17% N, and 96.93% Cu, while the other conditions remain the same.

[0077] Comparative Example 11 (Compared to GRcop-42)

[0078] This comparative example of multiphase composite reinforced copper alloy powder is composed of the following components by mass percentage: 3.3% Cr, 2.9% Nb, and 93.8% Cu.

[0079] The preparation of the multiphase composite reinforced copper alloy powder and the formed parts in this comparative example is as follows:

[0080] Powdering: The ingredients are prepared according to the following weight percentages: 3.3% Cr, 2.9% Nb, and 93.8% Cu, with a total weight of approximately 20 kg.

[0081] All other conditions are the same as in Comparative Example 1.

[0082] Comparative Example 12

[0083] The copper powder and molded parts for this comparative example were prepared as follows:

[0084] Powdering: Using 20kg of pure copper Cu as raw material, vacuum induction melting gas atomization technology is used for gas atomization powdering. The atomization atmosphere is a nitrogen-argon mixture, ensuring that the nitrogen-argon volume ratio is 1:4. The atomization temperature is 1720℃, and the powder is sieved through a 270-mesh sieve.

[0085] Printing and forming: The laser additive manufacturing technology used is laser powder bed fusion technology. The forming process parameters are set with a laser power of 950w and a scanning speed of 400mm / s.

[0086] The time-related processing is the same as in Example 5.

[0087] The morphology and elemental distribution of the copper alloy powder obtained in Example 5 were tested, and the results are shown in the figure. Figure 1 and Figure 2 .

[0088] The copper alloy powders obtained in Examples 1-8 and Comparative Examples 1-12 were subjected to laser absorption rate testing, and the multiphase composite reinforced copper alloy forming parts were subjected to density, thermal conductivity, room temperature tensile properties and high temperature tensile properties testing. The results are shown in Table 1.

[0089] Table 1

[0090]

[0091] As shown in Table 1, the embodiments of the present invention, by adding low solid solution components Cr, Nb and Ti to Cu, can obtain copper alloy powder with high laser absorption rate and good thermal conductivity, regardless of whether single-stage aging treatment or double-stage aging treatment is used, or VIGA, EIGA and PREP gas atomization is used. When applied to laser additive manufacturing, copper alloy formed parts with good tensile strength and high temperature performance can be obtained.

[0092] Comparison of the data from Comparative Examples 1-6 and Example 5 shows that when the mass percentages of Cr and Nb in the alloy are excessive, or when the amounts of Ti and N are excessive, or when Cr, Nb, and Ti are absent, the thermal conductivity, tensile strength, and high-temperature performance of the copper alloy powder used in laser additive manufacturing are reduced to varying degrees.

[0093] Comparison of the data from Comparative Examples 7-8 and Example 5 shows that when the atomizing atmosphere contains no nitrogen or contains excessive nitrogen, not only will the tensile strength and thermal conductivity of the copper alloy powder used in laser additive manufacturing be significantly reduced, but the laser absorption rate and density will also be reduced.

[0094] Meanwhile, a comparison of the data from Comparative Examples 9-10 and Example 5 shows that the ratio of Cr to Nb in the alloy is also very important.

[0095] Finally, in Comparative Example 11 of this invention, when Ti and N are not added, the laser absorption rate of the prepared copper alloy decreases, and the thermal conductivity, tensile strength, and high-temperature tensile strength all decrease, especially the high-temperature tensile strength. Comparative Example 12, using pure copper, produces molded parts with poor density and formability, low laser absorption rate, and requires higher laser power.

Claims

1. A multiphase composite reinforced copper alloy powder for laser additive manufacturing, characterized in that: It includes the following components by mass percentage: Cr：0.10～2.13%； Nb: 0.09–1.90%; Ti: 0.47–1.03%; N：0.13~0.30%； The balance is Cu and unavoidable impurities; The mass ratio of Cr to Nb is 1.0~1.2:1; The multiphase composite reinforced copper alloy powder for laser additive manufacturing is prepared by the following process: the raw materials are mixed in the designed proportion and then atomized in a nitrogen-containing atomizing atmosphere to obtain the powder. The nitrogen-containing atomizing atmosphere is a mixture of nitrogen and argon; the volume ratio of nitrogen to argon is 1:3~5; and the atomization temperature is 1720~1800℃.

2. The multiphase composite reinforced copper alloy powder for laser additive manufacturing according to claim 1, characterized in that: The impurities contain O and Fe; the O content is less than 500 ppm and the Fe content is less than 50 ppm.

3. The application of the multiphase composite strengthened copper alloy powder according to any one of claims 1 to 2 for laser additive manufacturing, characterized in that: It is used in laser additive manufacturing to prepare copper alloy shaped parts.

4. The application of a multiphase composite reinforced copper alloy powder for laser additive manufacturing according to claim 3, characterized in that: The conditions for laser additive manufacturing are as follows: laser power of 70~150W, scanning speed of 650~1200mm / s, printing spacing of 0.8~1.0mm, and powder layer thickness of 30~45μm.

5. The application of a multiphase composite reinforced copper alloy powder for laser additive manufacturing according to claim 4, characterized in that: After being applied to laser additive manufacturing, the material needs to undergo a forming process and an aging process in sequence; the aging process can be a single-stage aging process or a two-stage aging process.

6. The application of a multiphase composite reinforced copper alloy powder for laser additive manufacturing according to claim 5, characterized in that: The conditions for the single-stage aging treatment are: a holding temperature of 580~630℃ and a holding time of 1~3h; The conditions for the two-stage aging treatment are as follows: the first-stage heat preservation temperature is 320~380℃, the first-stage heat preservation time is 1~2h, the second-stage heat preservation temperature is 500~550℃, and the second-stage heat preservation time is 1~2h.

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