A titanium-based composite material with adjustable and controllable reinforced phase structure and a preparation method thereof

Abstract

The application discloses a kind of titanium-based composite material with adjustable and controllable reinforcing phase structure and its preparation method, the preparation method includes that base powder and reinforcing phase raw materials are mixed, ball milling, dry to obtain mixed powder;Mixed powder is printed on titanium alloy substrate to obtain titanium-based composite material by additive manufacturing;Wherein, when the granularity of reinforcing phase raw materials is nanometer level, and the mass percentage of the reinforcing phase raw materials in mixed powder is 0.01%-2%, with the mass percentage gradient of reinforcing phase raw materials decreases, the structure of reinforcing phase in the obtained titanium-based composite material is transformed into reticular→reticular and dispersion coexist→dispersion state.This preparation method can obtain titanium-based composite material with suitable strength and toughness by adjusting the size and content of reinforcing phase raw materials.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal matrix composite material additive manufacturing, and particularly relates to a titanium-based composite material with adjustable and controllable reinforced phase structure and a preparation method thereof. BACKGROUND

[0002] Titanium-based composite materials have a broad application prospect in high-end equipment fields such as aerospace due to their potential high strength, high toughness and heat resistance. Additive manufacturing technology is becoming an important way to realize the functional optimization design and lightweight manufacturing of high-end aerospace products, and has been widely and deeply studied in the organization and performance regulation of titanium alloys and titanium-based composite materials. Therefore, the mechanical properties and application potential of titanium-based composite materials regulated by additive manufacturing will be more enormous.

[0003] For traditional titanium-based composite materials, the introduction of the reinforced phase sacrifices the plasticity and fracture toughness, causing obvious brittleness, which is sometimes fatal to engineering applications. According to relevant research results, the uniform distribution or more dispersed distribution state of the reinforced phase regulated by traditional methods cannot fully exert the performance of the matrix and the reinforced phase. In recent years, in order to overcome the strong plasticity incoordination problem of traditional titanium-based composite materials, the design idea and preparation method of non-uniform distribution of the reinforced phase have gradually developed. By accurately regulating the spatial distribution of the reinforced phase, a mesoscale uniform and regular reinforced phase network structure is obtained, that is, a hard package soft microstructure morphology is formed, the reinforced phase enrichment forms a hard network wall to contribute to the strength of the material, and the matrix inside the network provides plastic deformation capacity and bearing, fully exerting the synergistic effect of the matrix and the reinforced phase, so the reinforced phase network distribution has the potential to solve the strength and plasticity contradiction.

[0004] Powder metallurgy (PM) is one of the most commonly used methods, and domestic and foreign researchers have successfully prepared titanium-based composite materials with spatial network structure distribution of the reinforced phase using this method. Specifically, the matrix is metallurgically combined by hot pressing sintering, plasma sintering and other methods, and the elements added on the surface of the powder react with the matrix to form the reinforced phase, and the powder forms the matrix inside the network structure, thus constructing a spatial network structure. The powder system and the reinforced phase system can be replaced according to actual application requirements, and have certain advantages. However, the size of the network structure is still relatively large, and the matrix inside the network cannot well coordinate the plastic deformation, so the uniform deformation capacity and tensile strength of the titanium-based composite material cannot be significantly improved. In addition, the network structure titanium-based composite materials reported are prone to failure mode of fracture along the network wall, which reduces the fracture toughness of the material, because the reinforced phase is not in-situ reaction and autogenesis under complete remelting under the powder metallurgy process conditions, and there are interface defects.

[0005] Chinese invention patent CN 101333607 B discloses a preparation method of TiBw / Ti alloy-based composite material. The invention is based on powder metallurgy to prepare Ti alloy-based composite material with net structure of TiBw. Compared with the base alloy, the strength is improved, but the elongation is low, and the strength and plasticity are obviously contradictory.

[0006] Chinese invention patent CN 202310051434.3 discloses a shell-core structure titanium-based composite powder and a preparation method of net structure titanium-based composite material. The invention is based on powder metallurgy to obtain the net structure of the reinforcing phase, but the size of the net structure of the reinforcing phase is limited by the powder size and cannot be adjusted and controlled during the preparation process.

[0007] Therefore, there is no report on the preparation of titanium-based composite material with adjustable and controllable reinforcing phase structure based on laser melting deposition technology. Compared with traditional methods, the parameter control range of additive manufacturing process is more extensive, and the organization and performance control process is more controllable. Therefore, by optimizing the printing parameters and design path strategy, the reinforcing phase structure (morphology and distribution) can be accurately controlled, and the base phase non-uniform distribution can be controlled, so as to realize the integrated control of the reinforcing phase structure-mechanical properties of titanium-based composite material. Among them, based on the additive manufacturing technology, the net distribution and trace dispersion distribution of the reinforcing phase are adjusted and controlled, which is expected to further improve the comprehensive mechanical properties of titanium-based composite material, which has important significance for the development of high strength and toughness heat-resistant titanium-based composite material, and will provide method reference for the research of additive manufacturing of other high-performance metal matrix composites. SUMMARY

[0008] The application provides a preparation method of titanium-based composite material with adjustable and controllable reinforcing phase structure. The preparation method can obtain titanium-based composite material with appropriate strength and toughness by adjusting and controlling the size and content of the reinforcing phase raw material.

[0009] The application provides a preparation method of titanium-based composite material with adjustable and controllable reinforcing phase structure, which comprises:

[0010] The base powder and the reinforcing phase raw material are mixed, ball milled and dried to obtain a mixed powder;

[0011] The mixed powder is printed on a titanium alloy substrate by additive manufacturing to obtain a titanium-based composite material;

[0012] When the particle size of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material in the mixed powder is 0.01%-2%, with the decrease of the mass percentage of the reinforcing phase raw material, the structure of the reinforcing phase in the obtained titanium-based composite material changes from net structure to net structure and dispersion coexistence to dispersion.

[0013] The in-situ self-grown reinforcing phase is well combined with the matrix in the laser melting deposition process, the fine reticular structure can coordinate the plastic deformation of the reticular structure and the matrix, the strong plasticity contradiction is solved, and the limitation of traditional means for regulating and controlling the mechanical properties of titanium-based composite materials is broken.

[0014] By changing the parameters of the original reinforcing phase additive, the size of the reticular structure is adjustable and controllable, and different sizes of the reticular structure show different strength and plasticity, so that the customization of the mechanical properties of the titanium-based composite material can be realized.

[0015] The reinforcing phase dispersed distribution titanium-based composite material prepared based on the laser melting deposition technology breaks the problem of poor plasticity of the reinforcing phase dispersed distribution titanium-based composite material prepared by traditional means. After additive manufacturing, no subsequent heat treatment is needed, realizing the integrated manufacturing of structure-organization-function of titanium-based composite material, which can meet the application requirements of complex structural parts in high-end equipment field.

[0016] Preferably, when the particle size of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material is 1% -2%, the structure of the reinforcing phase in the titanium-based composite material is a reticular structure, the tensile strength is 1150 MPa - 1300 MPa, and the elongation at break is 3% - 8%;

[0017] When the particle size of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material is 0.1% - 0.5%, not including the endpoint 0.1%, the structure of the reinforcing phase in the titanium-based composite material is a mixed structure of reticular and dispersed coexistence, the tensile strength is 1200 MPa - 1350 MPa, and the elongation at break is 6% - 11%;

[0018] When the particle size of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material is less than or equal to 0.1%, greater than 0.01%, the structure of the reinforcing phase in the titanium-based composite material is a dispersed structure, the tensile strength is 1000 MPa - 1200 MPa, and the elongation at break is 8% - 12%.

[0019] In the laser melting deposition forming process, at the same content, the nanometer particles are driven to gather at the grain boundaries or the molten pool boundaries by the heat flow to form a reticular structure distribution, while the remaining area remains dispersed distribution, and this mixed mode is beneficial to the coordination of strength and plasticity. The micron-sized particles have large size and low surface energy, and due to the difference in density or the rapid cooling of the molten pool, the diffusion of the reinforcing phase is inhibited, resulting in the reinforcing phase mainly gathering along the grain boundaries or the molten pool boundaries to form a reticular structure, and it is difficult to achieve dispersed distribution.

[0020] Further preferably, the reinforcing phase raw material is B4C and the matrix powder is TC4 (Ti6Al4V). During the laser melting process, the reinforcing phase raw material B4C reacts with the matrix Ti in-situ to form TiB and TiC, i.e. Ti + B4C → TiB + TiC. TiB is usually in the form of whiskers or short rods, which form semi-coherent interfaces with the matrix and provide load transfer strengthening, and also hinder dislocation movement and coordinate the deformation of the matrix phase; TiC exists in the form of nanoparticles, which hinder dislocation movement, and part of the C is dissolved in the matrix phase, which provides solid solution strengthening. The multi-scale and multi-morphology reinforcing phase synergistically enhances the strength and toughness of the material. In addition, both TiB and TiC can act as heterogeneous nucleation sites to refine the grain size of the matrix phase.

[0021] Further preferably, the particle size of the reinforcing phase raw material is 1 nm - 100 nm. Nanoparticles have high specific surface area and surface energy, and can act as heterogeneous nucleation sites to significantly increase the nucleation rate and refine the grain size of the matrix phase. The high specific surface area also better absorbs laser energy, promotes uniform diffusion and reaction of the raw material after melting, and thus the matrix phase is more uniform.

[0022] Preferably, when the particle size of the reinforcing phase raw material is micron level and the mass percentage of the reinforcing phase raw material in the mixed powder is 0.1% - 2.5%, the structure of the reinforcing phase in the titanium-based composite material is a network structure.

[0023] When the particle size of the reinforcing phase raw material is micron level and the mass percentage of the reinforcing phase raw material in the mixed powder is less than 0.1%, the structure of the reinforcing phase in the titanium-based composite material is a dispersed distribution.

[0024] When the particle size of the reinforcing phase raw material is micron level and the mass percentage of the reinforcing phase raw material in the mixed powder is greater than 2.5%, the structure of the reinforcing phase in the titanium-based composite material is a high-density dispersed distribution or a local aggregated distribution.

[0025] When the mass percentage of the reinforcing phase raw material in the mixed powder is low, the content of the reinforcing phase in the structure is low, so a network structure cannot be obtained. When the mass percentage of the reinforcing phase raw material is high, the reinforcing phase is too much and tends to aggregate, forming a high-density dispersed distribution or a local aggregated distribution.

[0026] Further preferably, the particle size of the reinforcing phase raw material is 1 μm - 10 μm. During the laser melting process, the reinforcing phase raw material with this particle size reacts sufficiently, has a significant refining effect on the matrix phase, and inhibits the formation of coarse columnar crystals in the deposition direction and promotes the formation of equiaxed crystals. If the particle size is larger, the reinforcing phase raw material is not easy to completely melt, flows unevenly to cause agglomeration, or reacts insufficiently to cause local stress concentration.

[0027] Further preferably, the reinforcing phase raw material is B4C, the matrix powder is TC4, the mass percentage of the reinforcing phase raw material in the mixed powder is 0.5% - 2.5%, and the size of the reticular structure decreases as the mass percentage of the reinforcing phase raw material in the mixed powder increases.

[0028] Preferably, the reinforcing phase raw material is B4C, TiB2, La2O3 or LaB6, and the matrix powder is TC4, TA15, TA1 or TC18.

[0029] The reinforcing phase raw material selected in the present application is a compound or elemental particle capable of chemically reacting with Ti element and generating a ceramic reinforcing phase.

[0030] Preferably, the particle size of the matrix powder is 50 μm - 150 μm.

[0031] Preferably, the ball milling process is as follows: the weighed mixed powder is poured into a ball milling tank, the ball milling tank is sealed and vacuumized, and the matrix powder and the reinforcing phase raw material are mixed in a planetary ball mill at a proportion, a rotation speed of 100 r / min - 300 r / min, a time of 3 h - 6 h, a rotation strategy of changing the rotation direction of the ball mill every 30 min with a pause of 5 min - 15 min, a steel ball size of 3 mm - 5 mm, and a ball-to-material ratio of 3:1 - 5:1.

[0032] Preferably, the drying process is as follows: the mixed powder is placed in a glass beaker and put into a vacuum drying oven for drying at 100 ℃ - 120 ℃ for 5 h - 10 h.

[0033] Preferably, the titanium alloy substrate thickness greater than 3 cm can prevent substrate deformation caused by thermal stress.

[0034] Preferably, the laser scanning strategy of the additive manufacturing is as follows: a snake-shaped reciprocating scanning within a layer and a 90° rotation between layers, a laser power of 500 W - 900 W, a scanning speed of 500 mm / min - 800 mm / min, a powder feeding rate of 3% - 5%, and a gas washing operation to reduce oxygen content before printing, with an oxygen content lower than 200 ppm.

[0035] Preferably, the matrix powder is a titanium alloy powder, and the titanium alloy powder is an α titanium alloy, a β titanium alloy or an (α+β) dual-phase titanium alloy.

[0036] Preferably, the original additive size includes nanoscale and microscale, the morphology of the reinforcing phase raw material includes irregular particle shape, spherical particle shape and sheet shape, and the reinforcing phase form includes compound and element.

[0037] Preferably, the morphology of the reinforcing phase includes granular, whisker, needle or lath.

[0038] The application also provides a titanium-based composite material with adjustable and controllable reinforcing phase structure, which is prepared by the preparation method of the titanium-based composite material with adjustable and controllable reinforcing phase structure.

[0039] Compared with the prior art, the application has the following beneficial effects:

[0040] The application controls the granularity of the reinforcing phase raw material to be nanoscale, so that the in-situ reaction of the reinforcing phase is more sufficient and uniform, and the reinforcing phase plays a better role in refining the matrix phase. Then, the application can obtain reinforcing phases with different micro-morphologies and spatial distributions by adjusting and controlling the mass percentage of the reinforcing phase raw material in the mixed powder, so that the strength and plasticity of the titanium-based composite material can be selected and controlled.

[0041] Meanwhile, during the laser melting deposition process, the in-situ self-grown ceramic reinforcing phase plays a role in refining the initial β-Ti. As the temperature of the molten pool decreases, the reinforcing phase enriched on the grain boundary of the initial β-Ti restricts the solidification of the matrix in the network, and the α laths in the network are mainly short rods. The reinforcing phase promotes the α nucleation on the edge of the network structure and hinders the growth of the α laths, and the fine and equiaxed α phase formed adheres to the edge of the network structure to construct the network distribution structure of the matrix α phase. Therefore, compared with the titanium-based composite materials prepared by the existing powder metallurgy method, the strength and plasticity of the titanium-based composite material provided by the application are improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is an SEM image of the network structure of the titanium-based composite material prepared in Example 1, and the white network is formed by the reinforcing phase.

[0043] Figure 2 is an SEM image of the network structure of the titanium-based composite material prepared in Example 2, and the white network is formed by the reinforcing phase.

[0044] Figure 3 is an SEM image of the network structure of the titanium-based composite material prepared in Example 3, and the white network is formed by the reinforcing phase.

[0045] Figure 4 is an SEM image of the network structure of the titanium-based composite material prepared in Example 4, and the white network is formed by the reinforcing phase.

[0046] Figure 5 is an SEM image of the network structure of the titanium-based composite material prepared in Example 5, and the white network is formed by the reinforcing phase.

[0047] Figure 6SEM image of the network structure of the titanium-based composite material prepared in Example 6, the white network and the dispersed white particles are the reinforcing phase.

[0048] Figure 7 SEM image of the network structure of the titanium-based composite material prepared in Example 7, the white particles are the reinforcing phase (indicated by arrows).

[0049] Figure 8 SEM image of the network structure of the titanium-based composite material prepared in Example 8, the white network is formed by the reinforcing phase.

[0050] Figure 9 SEM image of the network structure of the titanium-based composite material prepared in Example 9, the white particles, needles and rods are the reinforcing phase.

[0051] Figure 10 SEM image of the network structure of the titanium-based composite material prepared in Comparative Example 1, the white particles are the reinforcing phase (indicated by arrows).

[0052] Figure 11 SEM image of the network structure of the titanium-based composite material prepared in Example 10, the white network is formed by the reinforcing phase. DETAILED DESCRIPTION

[0053] The present application is further described in detail by the following specific examples.

[0054] Example 1: TC4 (Ti6Al4V) titanium alloy powder with a particle size of 50 μm - 150 μm was used as the matrix powder, B4C powder with a particle size of 2 μm - 4 μm was used as the original additive for in-situ reaction of the reinforcing phase, and the addition amount of B4C was 0.27wt.%. The rotation speed of the ball milling parameters was 200 r / min, the time was 5 h, the rotation direction of the ball mill was changed every 30 min, and the ball mill was stopped for 5 min, and the ball-to-material ratio was 3:1.

[0055] Additive manufacturing: the mixed powder was sent to the surface of the substrate by powder feeding airflow, and the laser melted it to form a molten pool, a single pass was formed with the one-way movement of the laser head, and a layer was formed by the staggered overlap between the single passes; after the completion of printing a layer, the laser head was moved up by 0.37 mm, and the process of molten pool→single pass→layer deposition was repeated, and the printing layer number was >100 layers, and finally the ultra-high strength and heat-resistant titanium-based composite material was obtained by layer-by-layer deposition.

[0056] The laser power was 800 W, the powder feeding rate was 5%, the lap rate was 40%, and the scanning speed was 700 mm / min; as shown in Figure 1 The reinforcing phase obtained by the reaction was TiB + TiC, the average size of the network structure was 16 μm, the room temperature tensile strength was 1152 MPa, and the elongation at break was 8.4%.

[0057] Example 2: The difference between this example and Example 1 is that the amount of B4C added is 0.55 wt.%. Figure 2 As shown, the average size of the mesh structure in this embodiment is 10 μm, the maximum tensile strength at room temperature is 1310 MPa, and the elongation at break is 7.5%.

[0058] Example 3: The difference between this example and Example 1 is that the amount of B4C added is 1.1 wt.%. Figure 3 As shown, the average size of the mesh structure in this embodiment is 7 μm, the room temperature tensile strength is 1283 MPa, and the elongation at break is 3.7%.

[0059] Example 4: TA15 (Ti6.5Al2Zr1Mo1V) titanium alloy powder was used as the matrix powder, and TiB2 and La2O3 powders were used as the original reinforcing phase additives for in-situ reaction. The particle size of TiB2 was 3-5 μm, the particle size of La2O3 was 1-3 μm, the amount of TiB2 powder added was 0.7 wt.%, and the amount of La2O3 added was 0.1 wt.%.

[0060] Additive manufacturing: Mixed powder is delivered to the surface of the substrate by a powder feeding gas flow. The laser melts the powder to form a molten pool. As the laser head moves unidirectionally, a single pass is formed. The single passes overlap to form a layer. After printing one layer, the laser head moves up 0.4 mm and repeats the process of molten pool → single pass → layer. The number of printed layers is greater than 100. Finally, an ultra-high strength heat-resistant titanium-based composite material is obtained through layer-by-layer deposition.

[0061] The printing power was 900 W, the powder feed rate was 5%, the overlap rate was 40%, the scanning speed was 600 mm / min, and the ball milling parameters were the same as in Example 1. The reinforcing phase obtained by the reaction was TiB + Ti2O. 3。 like Figure 4 As shown, in this embodiment, the reinforcing phase is distributed in a network structure with an average size of 10 μm, a room temperature tensile strength of 1350 MPa, and a breaking elongation of 6.5%.

[0062] Example 5: Using TA1 titanium alloy powder as the matrix powder and LaB6 powder as the original reinforcing phase additive for in-situ reaction, with a particle size of 50 nm and an addition amount of 0.7 wt.%, the printing power was 800 W, the scanning speed was 700 mm / min, and the ball milling parameters were the same as in Example 1. The reinforcing phase obtained by the reaction was TiB + Ti2O. 3。 like Figure 5 As shown, in this embodiment, the reinforcing phase is distributed in a network structure with an average size of 7 μm, a room temperature tensile strength of 780 MPa, and an elongation at break of 19.5%.

[0063] Based on examples 1-5, the enhanced phase network distribution is achieved in different titanium alloy systems.

[0064] Example 6: The difference between this example and example 1 is that the B4C particle size is 50 nm and the addition amount is 0.5 wt.%. As shown in the figure, the enhanced phase in this example is in a mixed mode of network structure and sporadic dispersion inside the network structure, the room temperature tensile strength is 1245 MPa, and the elongation at break is 6%. Figure 6

[0065] Based on examples 1-6, when the enhanced phase presents a network distribution, the matrix phase size presents the same distribution rule of network distribution, that is, the matrix phase size is smaller at the edge of the enhanced phase network and larger inside the network. It can be seen that by designing the original parameters of the enhanced phase addition, the network distribution of the enhanced phase and the network distribution of the matrix phase size are achieved.

[0066] Example 7: The difference between this example and example 6 is that the addition amount of B4C particles is 0.1 wt.%. As shown in the figure, the network structure is not obvious in this example, the enhanced phase is pinned in the grain boundary and inside the grain in a small amount, the main body presents a dispersed distribution, the room temperature tensile strength is 1168 MPa, and the elongation at break is 10.6%. Figure 7

[0067] Example 8: The difference between this example and example 7 is that the B4C particle size is 2-4 μm. As shown in the figure, the network structure is not obvious in this example, the enhanced phase is mainly pinned in the grain boundary, the main body presents a network distribution, the room temperature tensile strength is 1106 MPa, and the elongation at break is 8%. Figure 8 Based on examples 7 and 8, when the enhanced phase raw material is in nanoscale under a trace amount of addition, the enhanced phase is precipitated in a small amount at the grain boundary and inside the grain, the matrix phase size is smaller, and the morphology is short-axial and more uniform.

[0068] Based on examples 6 and 7, the enhanced phase is controlled from dispersion to network.

[0069] Example 9: The difference between this example and example 1 is that the addition amount of B4C is 2.75 wt.%. As shown in the figure, the network structure is not obvious in this example, the enhanced phase presents a dispersed or local aggregation distribution, the room temperature tensile strength is 1235 MPa, and the elongation at break is 1.5%.

[0070] Figure 9 Compared with examples 7 and 8, the microhardness of the material under this addition amount is higher, and the material is more wear-resistant and heat-resistant. It can be seen that by controlling the volume fraction of the dispersed distribution of the enhanced phase, the performance control can be achieved.

[0071] Compared with examples 7 and 8, the microhardness of the material under this addition amount is higher, and the material is more wear-resistant and heat-resistant. It can be seen that by controlling the volume fraction of the dispersed distribution of the enhanced phase, the performance control can be achieved. ​​​

[0072] Based on Examples 1-3 and Example 9, a distribution of the reinforcing phase from network to diffuse was achieved.

[0073] Based on Examples 1-9, one or more of the following are achieved in a titanium-based composite material: the reinforcing phase is granular, whisker-like, needle-like, or lath-like.

[0074] Example 10: The difference between this example and Example 6 is that the amount of B4C particles added is 1 wt.%. Figure 11 As shown, in this embodiment, the reinforcing phase is distributed in a network structure with relatively large size, exhibiting a room temperature tensile strength of 1256 MPa and a breaking elongation of 5%.

[0075] Comparative Example 1: The difference between this example and Example 6 is that the amount of B4C particles added is 0.01 wt.%. Figure 10 As shown, in this embodiment, a very small amount of reinforcing phase is pinned to the grain boundaries and within the grains, and the matrix phase is not effectively refined and shortened. The room temperature tensile strength is 1044 MPa and the elongation at break is 11%.

[0076] As described above, by adjusting the composition parameters and printing parameters, the enhanced phase structure in various titanium alloy matrices can be adjusted and controlled. The embodiments and comparative examples described are not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for producing a titanium-based composite material having a reinforced phase structure that is adjustable and controllable, characterized by, The application relates to a preparation method of a titanium-based composite material with adjustable and controllable reinforcing phase structures. The base powder and the reinforcing phase raw material are mixed, ball milled and dried to obtain a mixed powder; The mixed powder is printed on a titanium alloy substrate by additive manufacturing to obtain the titanium-based composite material; When the granularity of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material in the mixed powder is 0.01%-2%, with the decrease of the mass percentage of the reinforcing phase raw material, the structure of the reinforcing phase in the obtained titanium-based composite material is transformed into a reticular structure, a reticular structure and dispersion coexist, and a dispersion structure; The reinforcing phase raw material is B4C, and the base powder is TC4; The additive manufacturing method is a laser melting deposition method, and the laser power of the laser melting deposition method is 500 W-1000 W; When the granularity of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material is 1%-2%, the structure of the reinforcing phase in the titanium-based composite material is a reticular structure; When the granularity of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material is less than or equal to 0.1% and greater than 0.01%, the structure of the reinforcing phase in the titanium-based composite material is a dispersion structure.

2. The method of producing a titanium-based composite material with adjustable and controllable reinforced phase structures according to claim 1, characterized in that, When the granularity of the reinforcing phase raw material is nanoscale, and the mass percentage of the reinforcing phase raw material is 0.1%-0.5% and does not include the end point 0.1%, the structure of the reinforcing phase in the titanium-based composite material is a mixed structure of the reticular structure and the dispersion structure.

3. The method of producing a titanium-based composite material with adjustable and controllable reinforced phase structures according to claim 2, characterized in that, The granularity of the reinforcing phase raw material is 1 nm-100 nm.

4. The method of claim 1, wherein the method further comprises the step of: The laser scanning strategy of the additive manufacturing is that the scanning is in a snake-shaped reciprocating mode in a layer, and the scanning is rotated by 90 DEG between layers; the scanning speed is 500 mm / min-800 mm / min; before printing, the cabin body is subjected to a gas washing and oxygen content reduction operation, and the oxygen content is lower than 200 ppm.

5. A titanium-based composite material with enhanced adjustable controllable phase structure, characterized in that, The titanium-based composite material with adjustable and controllable reinforcing phase structures is prepared by the preparation method of the titanium-based composite material with adjustable and controllable reinforcing phase structures according to any one of claims 1-4.

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