Laser additive manufacturing method for titanium-based composite material with uniformly distributed ceramic reinforced phases

Abstract

The invention relates to a laser additive manufacturing method for a titanium-based composite material with uniformly distributed ceramic reinforced phases. The laser additive manufacturing method comprises the following steps: titanium alloy powder is Ti65 or Ti6242 or Ti60; the preparation method comprises the following steps: preparing titanium-based composite powder of which the ceramic reinforced phase powder is B4C or TiB2 or graphene or TiB or Ti3N4, scanning layer by layer in a single-channel and multi-layer or multi-channel and multi-layer scanning form under the laser power of 2500W-4000W, and carrying out laser three-dimensional solidification forming at the solidification speed of 200-1000ms to obtain the titanium-based composite material with uniformly distributed ceramic reinforced phases. According to the method, laser additive manufacturing of the titanium-based composite material with the ceramic reinforced phase evenly distributed is achieved, meanwhile, the process is simple, industrial application is facilitated, the requirements of different application fields are met, and application and development of the titanium-based composite material in more fields are promoted.

Description

Technical Field

[0001] The present invention relates to the field of preparation of metal matrix composites. Background Art

[0002] Titanium matrix composites have shown broad application prospects in many fields such as aerospace, automotive manufacturing, and biomedicine due to their high strength, low density, excellent corrosion resistance, and good biocompatibility. Among them, titanium matrix composites reinforced with TiB and TiC have become a research hotspot due to the high strength of the ceramic phase and its good bonding with the Ti matrix.

[0003] However, how to effectively control the distribution of ceramic reinforcement phases in the titanium matrix to achieve the best reinforcement effect has always been a research difficulty in this field. Laser solid forming technology is an advanced manufacturing technology that can achieve near-net shaping of complex-shaped parts. In particular, laser additive manufacturing technology has gradually replaced traditional manufacturing methods in the preparation of titanium matrix composites due to its high precision, high efficiency, and high material utilization rate. Laser additive manufacturing technology provides a new solution for the regulation of the distribution of reinforcement phases in titanium matrix composites.

[0004] The patent with the publication number CN112958784A discloses a method for actively controlling the uniform distribution and growth direction of reinforcement phases in particulate-reinforced titanium matrix composites. This method controls the growth direction of TiB by regulating laser process parameters and realizes the uniform distribution of reinforcement phases through annealing heat treatment. However, ultimately, it is finally regulated by heat treatment, and the process is relatively complex and difficult to accurately regulate. It is impossible to accurately control the titanium matrix composite with a uniform distribution of ceramic reinforcement phases through laser additive manufacturing, and it cannot meet the development and use requirements of metal laser additive manufacturing technology.

[0005] Therefore, studying the laser additive manufacturing method for controlling the uniform distribution of ceramic reinforcement phases in titanium matrix composites has important theoretical significance and practical application value. Summary of the Invention

[0006] The purpose of the present invention is to avoid the deficiencies of the prior art and provide a laser additive manufacturing method for titanium matrix composites with a uniform distribution of ceramic reinforcement phases.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: a laser additive manufacturing method for titanium matrix composites with a uniform distribution of ceramic reinforcement phases, comprising the following steps: Step 1: Mix titanium alloy powder and ceramic reinforcement phase powder, and successively carry out ball milling and drying on the mixed powder to obtain titanium matrix composite powder; Among them, the titanium alloy powder is high-temperature titanium alloy powder; the ceramic reinforcement phase powder is at least one powder of carbide, boride, nitride, and carbon material; The mass ratio of the ceramic reinforcing phase powder to the mixed powder is 0.2 - 1 wt%. Step 2: Feed the composite powder into the laser molten pool at a coaxial powder feeding speed of 4 - 10 g / min, and use a laser beam with a laser power of 2500 - 4000 W to scan layer by layer in the form of single - pass multi - layer or multi - pass multi - layer at a scanning speed of 240 - 780 mm / min, so as to increase the convection intensity in the tiny molten pool formed by the titanium - based composite powder and make B and C atoms of the ceramic reinforcing phase evenly distributed in the molten pool. The scanned and formed material is solidified by laser stereolithography at a solidification speed of 200 - 1000 ms, so that the ceramic reinforcing phase can be evenly distributed inside the matrix through in - situ self - generation reaction, and thus a titanium - based composite material with evenly distributed ceramic reinforcing phase is obtained. Among them, when the laser power is lower than or equal to 2500 W, the ceramic reinforcing phase in the titanium - based composite material aggregates at the original β - grain boundary and forms irregular - sized networks, and at this time, a titanium - based composite material with evenly distributed ceramic reinforcing phase cannot be obtained. When the laser power is equal to or higher than 4000 W, TiB and TiC in the titanium - based composite material show a network - like structure distribution, and at this time, a titanium - based composite material with evenly distributed ceramic reinforcing phase cannot be obtained.

[0008] Further, in the ball - milling and powder - mixing step in Step 1, specifically, under argon protection, ZrO 2 grinding balls are added to the mixed powder of the ceramic reinforcing phase and the titanium alloy powder, where the mass ratio of the ZrO 2 grinding balls to the mixed powder is (2 - 7):1, and ZrO grinding balls with diameters of 10 mm, 8.5 mm, and 5 mm are added, and the mass ratio is 1:3:6; 2 Then ball - milling is carried out on a planetary ball mill, the ball - milling speed is 200 - 400 rpm, and the ball - milling time is 2 - 5 h; the powder after ball - milling is separated from the ZrO grinding balls using an 80 - 200 - mesh sieve, and thus a titanium - based composite powder of the ceramic reinforcing phase and the titanium alloy matrix is obtained. 2

[0009] Further, in the drying step in Step 1, specifically, in a vacuum drying oven, the titanium - based composite powder is dried for 1 - 3 h under the condition that the drying temperature is 80 - 120 °C.

[0010] Further, in Step 2, the single - pass multi - layer means that the laser beam performs cyclic reciprocating stacking scans along one direction; the multi - pass multi - layer means that the laser beam of the same layer performs S - type cyclic reciprocating scans, then the second layer rotates 90° relative to the first layer and performs S - type cyclic reciprocating scans, and finally stacking forming is carried out.

[0011] ​Further, the titanium matrix composite material sample in step two is obtained by successively grinding and polishing the titanium matrix composite material with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers, deeply etching at least half of the ground and polished titanium matrix composite material with an etchant for at least 30 s, finally cleaning the surface of the titanium matrix composite material with absolute ethanol, and finally drying it with a hair dryer; The titanium matrix composite material sample is used for observing the microstructure of the obtained titanium matrix composite material.

[0012] Further, the ceramic reinforcing phase has an irregular shape and an average particle size of 50 nm to 5 μm; the titanium alloy powder is spherical particles with an average particle size of 53 to 150 μm.

[0013] Further, the titanium alloy powder is Ti65 or Ti6242 or Ti60 powder, and the ceramic reinforcing phase is one or more of B4C or TiB2 or graphene or TiB or Ti3N4 or TiC or C.

[0014] The beneficial effects of the present invention are as follows: By adjusting the process parameters in the laser additive manufacturing process, the present invention realizes the control of the distribution of the reinforcing phase and obtains a ceramic-reinforced titanium matrix composite material with a uniform distribution of the reinforcing phase. In addition, by adjusting the process parameters of laser additive manufacturing, the microstructure of the composite material is further regulated, realizing the active control of the distribution of the reinforcing phase in the titanium matrix composite material. At the same time, the process is relatively simple, facilitating industrial application, meeting the requirements of different application fields, and promoting its application and development in more fields. Description of the Drawings

[0015] Figure 1 : Microstructure pictures of specific example 1 and comparative example 1; Figure 2 : Microstructure pictures of specific example 2 and comparative examples 2 and 3. Specific Embodiments

[0016] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0017] To achieve the above object, the present invention provides the following specific embodiments: Example 1: A method for laser additive manufacturing of a titanium matrix composite material with a uniform distribution of ceramic reinforcing phase, comprising the following steps: Step 1. Mix the titanium alloy powder and the ceramic reinforcing phase powder, and successively perform ball milling and powder mixing and drying on the mixed powder to obtain a titanium matrix composite powder; Among them, the titanium alloy powder is a high-temperature titanium alloy powder, the titanium alloy powder is spherical particles, and the average particle size is 53 - 150 μm; the ceramic reinforcing phase powder is at least one powder among carbides, borides, nitrides, and carbon materials, the ceramic reinforcing phase is irregular in shape, and the average particle size is 50 nm - 5 μm; The mass ratio of the ceramic reinforcing phase powder to the mixed powder is 0.2 - 1 wt%; Among them, in the ball milling and powder mixing step, specifically, under argon protection, ZrO 2 grinding balls are added to the mixed powder of the ceramic reinforcing phase and the titanium alloy powder, where ZrO 2 the mass ratio of the grinding balls to the mixed powder is (2 - 7):1, and ZrO grinding balls with diameters of 10 mm, 8.5 mm, and 5 mm are added 2 and the mass ratio is 1:3:6; Then ball milling is carried out on a planetary ball mill, the ball milling speed is 200 - 400 rpm, and the ball milling time is 2 - 5 h; use an 80 - 200 mesh sieve to separate the powder after ball milling from the ZrO 2 grinding balls, and the titanium-based composite powder of the ceramic reinforcing phase and the titanium alloy matrix is obtained.

[0018] Among them, in the drying step, specifically, in a vacuum drying oven, the titanium-based composite powder is dried for 1 - 3 h under the condition that the drying temperature is 80 - 120 °C.

[0019] Step 2: Feed the composite powder into the laser molten pool at a coaxial powder feeding speed of 4 - 10 g / min, use a laser beam with a laser power of 2500 - 4000 W, and a scanning speed of 240 - 780 mm / min, and scan and form layer by layer in a single-pass multi-layer scanning form to increase the convection intensity in the tiny molten pool formed by the titanium-based composite powder, so that B and C atoms of the ceramic reinforcing phase are evenly distributed in the molten pool; Among them, the single-pass multi-layer means that the laser beam scans and stacks in a cyclic reciprocating manner along one direction; The scanned and formed material is laser solidified and formed at a solidification speed of 200 - 1000 ms to enable the ceramic reinforcing phase to be evenly distributed inside the matrix through in-situ self-generation reaction, and the titanium-based composite material with the ceramic reinforcing phase evenly distributed is obtained; Among them, when the laser power is lower than or equal to 2500 W, the ceramic reinforcing phase in the titanium-based composite material aggregates at the original β grain boundary and forms a network of irregular sizes, and at this time, a titanium-based composite material with the ceramic reinforcing phase evenly distributed cannot be obtained; And when the laser power is equal to or higher than 4000 W, TiB and TiC in the titanium-based composite material show a network structure distribution, and at this time, a titanium-based composite material with the ceramic reinforcing phase evenly distributed cannot be obtained.

[0020] Example 2: The same as Example 1, except that in Step 2, it is scanned and formed layer by layer in a multi-track and multi-layer scanning form. For the multi-track and multi-layer, the laser beam of the same layer performs an S-shaped reciprocating scan, then the second layer rotates 90° relative to the first layer and performs an S-shaped reciprocating scan, and finally the stacking forming is carried out.

[0021] Example 3: The same as Example 1, except that it further includes the step of preparing a titanium matrix composite material specimen. The titanium matrix composite material specimen is successively ground and polished step by step with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers for the obtained titanium matrix composite material. At least half of the titanium matrix composite material after grinding and polishing is deeply etched with an etchant for at least 30 s, and finally the surface of the titanium matrix composite material is cleaned with absolute ethanol and finally dried with a hair dryer to obtain it; The titanium matrix composite material specimen is used to observe the microstructure of the obtained titanium matrix composite material.

[0022] Example 4: The same as Example 2, except that it further includes the step of preparing a titanium matrix composite material specimen. The titanium matrix composite material specimen is successively ground and polished step by step with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers for the obtained titanium matrix composite material. At least half of the titanium matrix composite material after grinding and polishing is deeply etched with an etchant for at least 30 s, and finally the surface of the titanium matrix composite material is cleaned with absolute ethanol and finally dried with a hair dryer to obtain it; The titanium matrix composite material specimen is used to observe the microstructure of the obtained titanium matrix composite material.

[0023] Example 5: The same as Example 1, except that the titanium alloy powder is Ti65 and the titanium ceramic reinforcing phase powder is B4C.

[0024] Example 6: The same as Example 1, except that the titanium alloy powder is Ti6242 and the titanium alloy powder is spherical particles; the ceramic reinforcing phase powder is TiB2.

[0025] Example 7: The same as Example 1, except that the titanium alloy powder is Ti60 and the titanium ceramic reinforcing phase powder is graphene.

[0026] Example 8: The same as Example 1, except that the titanium alloy powder is Ti65 and the titanium alloy powder is spherical particles; the ceramic reinforcing phase powder is TiB.

[0027] Example 9: The same as Example 1, except that the titanium alloy powder is Ti6242 and the ceramic reinforcing phase powder is Ti3N4.

[0028] Example 10: Identical to Example 1, except that the titanium alloy powder is Ti65, and the ceramic reinforcing phase powder is any two of B4C, TiB2, graphene, TiB, or Ti3N4.

[0029] Example 11: Identical to Example 1, except that the titanium alloy powder is Ti6242, and the ceramic reinforcing phase powder is any two of B4C, TiB2, graphene, TiB, or Ti3N4.

[0030] Example 12: Identical to Example 1, except that the titanium alloy powder is Ti60, and the ceramic reinforcing phase powder is any two of B4C, TiB2, graphene, TiB, or Ti3N4.

[0031] As Figure 1 、 Figure 2 shown, in order to further illustrate the technical solutions and effects of the present invention, the present invention provides the following specific examples: Specific Example 1: In this example, spherical Ti65 alloy and B4C ceramic reinforcing phase composite powder are taken, and the specific implementation steps are as follows: Step 1: Take 0.45 g of B4C powder, 149.55 g of Ti65 powder, and 600 g of ZrO2 grinding balls and put them into a ball mill tank. Among them, B4C has an irregular shape with an average particle size of 50 nm, and the Ti65 powder is spherical particles with an average particle size of 89 μm. Ball mill and mix the B4C / Ti65 composite powder on a planetary ball mill, set the ball milling time to 3 h, and the ball milling speed to 300 rpm. The composite powder is dried in a vacuum drying oven, where the drying temperature is 120 °C and the drying time is 2 h.

[0032] Step 2: Set the laser power to 3000 W, the powder feeding speed to 7 g / min, and the scanning speed to 240 mm / min to form a 0.3 wt% B4C / Ti65 composite material.

[0033] Step 3: Gradually polish the XOZ plane of the 0.3 wt% B4C / Ti65 composite material sample obtained in Step 2 with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers in sequence, and subject half of the sample to deep etching with an etchant for 30 s. Finally, clean the surface of the sample with absolute ethanol and dry it with a hair dryer for standby.

[0034] Step 4: Observe the microstructure of the 0.3 wt% B4C / Ti65 composite material sample obtained in Step 3 using a Helios G3 UC focused ion / electron dual-beam electron microscope, as Figure 1As shown in (a), where the white contrast phases are TiB and TiC, and TiB and TiC in the composite material are uniformly distributed in the matrix under a laser power of 3000W.

[0035] In this specific example, the higher laser power enhances the convection in the tiny molten pool, enabling the uniform distribution of B and C atoms within the molten pool. Subsequently, it solidifies at a solidification rate of 200 - 1000 ms, allowing B and C atoms to directly combine with Ti atoms to form TiB and TiC, thereby obtaining a titanium matrix composite with uniformly distributed reinforcing phases.

[0036] Comparative Example 1: In this example, spherical Ti65 alloy and B4C ceramic reinforcing phase composite powder were taken, which is the same as in Specific Example 1, except that: Step 2: Set the laser power to 2000W, the powder feeding speed to 7 g / min, and the scanning speed to 240 mm / min to form a 0.3 wt%B4C / Ti65 composite material.

[0037] Step 3: The XOZ plane of the 0.3 wt%B4C / Ti65 composite material sample obtained in Step 2 was successively polished with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers. Half of the sample was deeply etched with an etchant for 30 s, and finally, the surface of the sample was cleaned with absolute ethanol and dried with a hair dryer for standby.

[0038] Step 4: A Helios G3 UC focused ion / electron dual-beam electron microscope was used to observe the microstructure of the 0.3 wt%B4C / Ti65 composite material sample obtained in Step 3, as Figure 1 shown in (b), where the white contrast phases are TiB and TiC, and TiB and TiC in the composite material are distributed in a network pattern in the matrix under a laser power of 2000W.

[0039] Specific Example 2: In this example, spherical Ti65 alloy and TiB2 and graphene ceramic reinforcing phase composite powder were taken, and the specific implementation steps are as follows: Step 1: Take 1.50 g of TiB2 powder, 147.95 g of Ti65 powder, and 600 g of ZrO2 grinding balls and put them into a ball mill tank. Among them, TiB2 has an irregular shape with an average particle size of 4 μm, and Ti65 powder is spherical with an average particle size of 89 μm. The TiB2 / Ti65 composite powder was ball-milled and mixed on a planetary ball mill, setting the ball-milling time to 2 h and the ball-milling speed to 300 rpm. Then, the mixed powder was sieved out using a sieve, 0.55 g of graphene was added, and ball milling was continued, setting the ball-milling time to 2 h and the ball-milling speed to 250 rpm. The composite powder was dried in a vacuum drying oven, where the drying temperature was 120°C and the drying time was 2 h.

[0040] Step 2: Set the laser power to 3000 W, the powder feeding speed to 10 g / min, the scanning speed to 420 mm / min, and form the (TiB2 + graphene) / Ti65 composite material.

[0041] Step 3: Gradually grind and polish the XOZ plane of the (TiB2 + graphene) / Ti65 composite material sample obtained in Step 2 with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers in sequence. Deeply corrode half of the sample with the etchant for 30 s. Finally, clean the surface of the sample with absolute ethanol and dry it with a hair dryer for standby.

[0042] Step 4: Observe the microstructure of the (TiB2 + graphene) / Ti65 composite material sample obtained in Step 3 using a Helios G3 UC focused ion / electron dual-beam electron microscope, as Figure 2 shown in (a). The white contrast phases are TiB and TiC. Under a laser power of 3000 W, TiB and TiC in the composite material are mainly uniformly distributed.

[0043] Comparative Example 2: In this example, spherical Ti65 alloy and TiB2 and graphene ceramic reinforcing phase composite powder are taken, which is the same as Specific Example 2, except that: Step 2: Set the laser power to 2500 W, the powder feeding speed to 7 g / min, the scanning speed to 420 mm / min, and form the (TiB2 + graphene) / Ti65 composite material.

[0044] Step 3: Gradually grind and polish the XOZ plane of the (TiB2 + graphene) / Ti65 composite material sample obtained in Step 2 with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers in sequence. Deeply corrode half of the sample with the etchant for 30 s. Finally, clean the surface of the sample with absolute ethanol and dry it with a hair dryer for standby.

[0045] Step 4: Observe the microstructure of the (TiB2 + graphene) / Ti65 composite material sample obtained in Step 3 using a Helios G3 UC focused ion / electron dual-beam electron microscope, as Figure 2 shown in (b). The white contrast phases are TiB and TiC. Under a laser power of 2500 W, TiB and TiC in the composite material are mainly distributed in a network pattern.

[0046] Comparative Example 3: In this example, spherical Ti65 alloy and TiB2 and graphene ceramic reinforcing phase composite powder are taken, which is the same as Specific Example 2, except that: Step 2: Set the laser power to 4000 W, the powder feeding speed to 10 g / min, the scanning speed to 420 mm / min, and form the (TiB2 + graphene) / Ti65 composite material.

[0047] Step 3: Gradually polish the XOZ plane of the (TiB2 + graphene) / Ti65 composite material sample obtained in Step 2 with 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpapers in sequence. Deeply etch half of the sample with an etchant for 30 s. Finally, clean the surface of the sample with absolute ethanol and dry it with a hair dryer for standby.

[0048] Step 4: Use a Helios G3 UC focused ion / electron dual-beam electron microscope to observe the microstructure of the (TiB2 + graphene) / Ti65 composite material sample obtained in Step 3, as Figure 2 shown in (c). The white contrast phases are TiB and TiC. At a laser power of 4000 W, TiB and TiC in the composite material are all distributed in a network pattern.

[0049] In this comparative example, too high a laser power makes the overheating of the composite material obvious, slows down the solidification speed, allows sufficient time for B and C atoms to diffuse, causes composition segregation and forms a network structure. Subsequently, TiB and TiC precipitate in the segregation regions of high-concentration B and C elements, forming a complete quasi-continuous network distribution. Obviously, it is impossible to obtain a titanium matrix composite material with a uniform distribution of ceramic reinforcement phases.

[0050] However, the present invention controls the distribution of the reinforcement phase by regulating the process parameters in additive manufacturing, thereby regulating the microstructure of the composite material, achieving active control of the distribution of the reinforcement phase in the titanium matrix composite material. The process is simple, the cost is low, and the feasibility is high.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser additive manufacturing method for titanium-based composite materials with uniformly distributed ceramic reinforcement phases, characterized in that: The following steps are involved: Step 1: mixing titanium alloy powder with ceramic reinforcement phase powder, and sequentially ball milling and drying the mixed powder to obtain titanium-based composite powder; Wherein, the titanium alloy powder is a high-temperature titanium alloy powder; the ceramic reinforcement phase powder is at least one powder of carbide, boride, nitride and carbon material; The mass ratio of the ceramic reinforcement phase powder to the mixed powder is 0.2-1wt%; Step 2: Feed the composite powder into the laser molten pool at a coaxial powder feeding speed of 4 to 10 g / min, and scan and form the composite powder layer by layer in a single-pass multi-layer or multi-pass multi-layer scanning form with a laser beam having a laser power of 2500 to 4000 W and a scanning speed of 240 to 780 mm / min, so as to increase the convection intensity in the tiny molten pool formed by the titanium-based composite powder, so that the B and C atoms of the ceramic reinforcement phase are evenly distributed in the molten pool; The scanned and formed material is solidified by laser stereolithography at a solidification speed of 200 to 1000 ms to allow the ceramic reinforcement phase to be evenly distributed inside the matrix through an in-situ autogenous reaction, thus obtaining a titanium-based composite material with evenly distributed ceramic reinforcement phase; Among them, when the laser power is less than or equal to 2500W, the ceramic reinforcement phase in the titanium-based composite material gathers at the original β grain boundary and forms a network of irregular size. At this time, it is impossible to obtain a titanium-based composite material with uniform distribution of the ceramic reinforcement phase; When the laser power is equal to or higher than 4000W, TiB and TiC in the titanium-based composite material present a network structure distribution, and at this time, it will be impossible to obtain a titanium-based composite material with a uniform distribution of ceramic reinforcement phase.

2. The laser additive manufacturing method for titanium-based composite materials with uniformly distributed ceramic reinforcement phases according to claim 1, characterized in that: The ball milling powder mixing step described in step 1 is specifically to add ZrO2 grinding balls to the mixed powder of the ceramic reinforcement phase and the titanium alloy powder under argon protection, wherein the mass ratio of ZrO2 grinding balls to the mixed powder is (2-7):1, and the mass ratio of ZrO2 grinding balls with diameters of 10 mm, 8.5 mm, and 5 mm is 1:3:6; Then, the ball milling is carried out on a planetary ball mill with a ball milling speed of 200-400 rpm and a ball milling time of 2-5 hours. The powder after ball milling is separated from the ZrO2 grinding balls using a 80-200 mesh sieve to obtain a titanium-based composite powder of a ceramic reinforcement phase and a titanium alloy matrix.

3. The laser additive manufacturing method for titanium-based composite materials with uniformly distributed ceramic reinforcement phases according to claim 1, characterized in that: The drying step described in step 1 is specifically to dry the titanium-based composite powder in a vacuum drying oven at a drying temperature of 80 to 120° C. for 1 to 3 hours.

4. The laser additive manufacturing method for titanium-based composite materials with uniformly distributed ceramic reinforcement phases according to claim 1, characterized in that: The single-pass multilayer described in step 2 is a cyclic reciprocating stacking scanning of the laser beam along one direction; the multi-pass multilayer described is an S-shaped cyclic reciprocating scanning of the laser beam on the same layer, and then the second layer is rotated 90° relative to the first layer and then S-shaped cyclic reciprocating scanning is performed, and finally the stacking is formed.

5. The laser additive manufacturing method for titanium-based composite materials with uniformly distributed ceramic reinforcement phases according to claim 1, characterized in that: The titanium-based composite material sample in step 2 is obtained by grinding and polishing the titanium-based composite material step by step using 180#, 400#, 800#, 1200#, 1500#, and 2000# SiC water sandpaper in sequence, deep etching at least half of the titanium-based composite material using an etchant for at least 30s, and finally cleaning the surface of the titanium-based composite material with anhydrous ethanol and finally drying it with a hair dryer; The titanium-based composite material sample is used to observe the microstructure of the obtained titanium-based composite material.

6. The laser additive manufacturing method for titanium-based composite materials with uniformly distributed ceramic reinforcement phases according to any one of claims 1 to 5, characterized in that: The ceramic reinforcement phase is irregular in shape, with an average particle size of 50nm-5μm; the titanium alloy powder is spherical particles, with an average particle size of 53-150μm.

7. The laser additive manufacturing method for titanium-based composite materials with uniformly distributed ceramic reinforcement phases according to any one of claims 1 to 5, characterized in that: The titanium alloy powder is Ti65 or Ti6242 or Ti60 powder, and the ceramic reinforcement phase is one or more of B4C or TiB2 or graphene or TiB or Ti3N4 or TiC or C.

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