167 results about "Titanium matrix composites" patented technology

The invention discloses a preparation method of a nano lanthanum hexaboride reinforced titanium-based composite material, which comprises the following steps: performing low-energy ball milling and high-energy ball milling on a pure titanium metal powder and / or titanium alloy powder base material and a nano lanthanum hexaboride powder reinforced phase to obtain composite powder; sintering in a rapid hot-pressing sintering furnace, and cooling to obtain a LaB6 / Ti-based sintered blank; and carrying out heat-preservation hot rolling in a vacuum heat treatment furnace. The invention further discloses the nanometer lanthanum hexaboride reinforced titanium-based composite material and application. The nanometer lanthanum hexaboride reinforced titanium-based composite material has excellent strength and ductility, the tensile strength reaches 1035 MPa, the percentage elongation after fracture is 5%-25%, and the strength is improved by 60% or above compared with that of pure titanium; the preparation method is short in process, high in efficiency, low in production cost, high in universality and suitable for various titanium or titanium alloy base materials, and the composite material has good application prospects in the fields of radar, aviation, aerospace, automobiles, electronic industry and biomedicine.

The invention belongs to the technical field of metal material forming, and relates to a high-strength plastic titanium-based composite material annular part and a preparation method and application thereof. The preparation method comprises the following steps: firstly, uniformly mixing titanium alloy powder and reinforced phase powder, then preparing an annular blank according to the technological process of smelting, plasma rotating electrode atomization, degassing seal welding, hot isostatic pressing and ring rolling, and finally, annealing the annular blank to prepare the target annular part. According to the method, the titanium-based composite material powder is prepared by replacing a traditional laboratory small-batch ball milling method with a large-batch mixing method, a vacuum induction melting rod manufacturing method and a plasma rotating electrode atomization method, a reinforced phase can be introduced into a titanium matrix crystal and uniformly distributed, and the method is suitable for industrial large-batch production requirements; the titanium-based composite material annular part is prepared through the technology of powder metallurgy blank making and thermal deformation, and the effects of shortening the machining period and improving the material utilization rate and the forming rate are achieved through the precise size of powder metallurgy forming and the high efficiency of special-shaped ring rolling.

The invention discloses a titanium-based composite material with an adjustable and controllable reinforced phase structure and a preparation method of the titanium-based composite material. The preparation method comprises the steps that matrix powder and reinforced phase raw materials are mixed, ball-milled and dried to obtain mixed powder; printing the mixed powder on a titanium alloy substrate through additive manufacturing to obtain a titanium-based composite material; wherein when the granularity of the reinforcing phase raw material is in a nanometer level and the mass percent of the reinforcing phase raw material in the mixed powder is 0.01%-2%, along with the gradient decrease of the mass percent of the reinforcing phase raw material, the structure of the reinforcing phase in the obtained titanium-based composite material is converted into a net shape, a net and dispersion coexistence shape and a dispersion shape. According to the preparation method, the titanium-based composite material with proper obdurability can be obtained by regulating and controlling the size and the content of the reinforced phase raw materials.

The invention provides a laser deposition workpiece temperature field simulation and microstructure prediction method and system, and relates to the technical field of additive manufacturing. Constructing a finite element model of the deposition structure, and setting laser deposition parameters; constructing a heat source model and a surface growth model; selecting a material type and a calculation type, and setting the mass ratio of each element in the mixed powder as a deposition material, and the material thermophysical property parameters and the temperature gradient of the mixed powder; constructing a laminar fluid flow equation; constructing a non-isothermal flow equation and an equation that the surface tension coefficient changes along with the temperature; simulating a temperature field and a velocity field in the laser deposition manufacturing process; and according to the temperature field and velocity field distribution result, the temperature gradient and the solidification rate of each area in the sedimentary structure are calculated, and microstructure morphology prediction is carried out according to the temperature gradient and the solidification rate. The problem that in the prior art, it is difficult to predict temperature distribution and microstructure morphology of a deposited layer of the titanium-based composite manufactured through laser deposition is solved.

The invention belongs to the technical field of blade ring structure optimization design of composite materials, and particularly relates to a structure optimization design method of a titanium-based composite material integral blade ring, which comprises the following steps of: analyzing and calculating an equivalent elastic constant of a titanium-based composite material on a micro-scale, and performing secondary development on Abaqus software by using a Python language on a macro-scale to obtain an equivalent elastic constant of the titanium-based composite material integral blade ring; and then compiling a static analysis plug-in of the integral blade ring structure, and finally realizing optimal design of the blade ring structure by utilizing an automatic plug-in. The method has the advantages of being simple, easy to operate, high in efficiency and the like, the static strength reserve coefficient-optimization parameter curve is formed by carrying out automatic finite element simulation of various integral blade ring structural forms, and the further obtained optimization conclusion provides effective guidance and basis for the structural forms of the integral blade ring.

The invention discloses a high-wear-resistance additive forming titanium-based composite material and a preparation method thereof. The high-abrasion-resistance additive forming titanium-based composite material is mainly composed of a base body and an amorphous ceramic film, and the high-abrasion-resistance additive forming titanium-based composite material is prepared from, by mass, 97.0%-99.8% of the base body and 0.2%-3% of the amorphous ceramic film. By accurately controlling the thickness and the quality of the amorphous ceramic film, the number and the size of the reinforced phases can be regulated and controlled, and the fluidity and the oxidation resistance of the additive manufacturing titanium alloy powder can be remarkably improved through introduction of the amorphous ceramic film; the in-situ synthesis ceramic reinforced titanium-based composite material prepared through additive manufacturing is free of cracks, high in hardness, good in wear resistance and suitable for being used under harsh working conditions.

The invention relates to a preparation method of a titanium-based composite material based on high-entropy boride ceramic modification, and belongs to the technical field of titanium-based composite material powder metallurgy. The high-entropy boride ceramic is (ZrHfTaTi) B2 in an equal molar ratio. The preparation method comprises the following steps that firstly, high-entropy boride ceramic powder and pure titanium powder are evenly mixed through ball-milling mixing, then the mixed powder is subjected to rapid hot pressing sintering, a sintered block is subjected to hot rolling treatment, and finally the titanium-based composite material is obtained. The composite material has excellent room-temperature and high-temperature comprehensive mechanical properties, the performance is greatly improved compared with commercial pure titanium, and the composite material can be used for manufacturing high-performance parts in the fields of aerospace and the like.

The invention discloses a post-treatment method for high-toughness modification of a molten titanium-based composite material of a laser powder bed, relates to the field of metal-based composite materials, and aims to solve the problem that the room-temperature toughness of the titanium-based composite material is not matched. According to the preparation method, a near-alpha titanium alloy or alpha + beta double-phase titanium alloy is selected as a matrix to be mixed with a ceramic reinforced phase, and then the titanium-based composite material is prepared; performing hot isostatic pressing treatment in the alpha + beta two-phase region; and the titanium-based composite material subjected to hot isostatic pressing is subjected to solution aging treatment, then water cooling is conducted, and then furnace cooling is conducted after aging treatment. Through the combination of hot isostatic pressing and solid solution aging treatment, the room-temperature plasticity is remarkably improved while the strength is almost not reduced, and high compactness, high strength and high toughness of the titanium-based composite material are achieved. The mechanical property of the titanium-based composite material is greatly improved, the problem that the toughness of the titanium-based composite material is not matched at room temperature is solved, and the method has important significance in wide application and popularization of the laser powder bed molten titanium-based composite material in engineering practice.

The invention discloses a tungsten mesh reinforced titanium-based composite board based on a pulse current auxiliary non-uniform temperature field and a preparation method of the tungsten mesh reinforced titanium-based composite board, and belongs to the technical field of composite materials. The problem that reinforcement protection and good diffusion of an alloy matrix cannot be both considered in the prior art is solved. The tungsten mesh and the high-temperature titanium alloy are combined, heating is achieved through the Joule heating effect generated by pulse current, meanwhile, a non-uniform temperature field is established, the relative high temperature (larger than or equal to 1000 DEG C) is maintained in the tungsten mesh area, the low temperature is achieved in the high-temperature titanium alloy area, the interface diffusion reaction is promoted, and finally solid-phase densification connection of the composite material is achieved. According to the method, the problem of alloy matrix grain coarsening caused by traditional high-temperature sintering is solved, and thermal stress mismatch between the tungsten mesh and the matrix is relieved through the non-uniform temperature field. The method has the characteristics of low energy consumption, high efficiency, small reinforcement damage and the like, and is suitable for large-scale preparation of the high-performance titanium-based composite material in the aerospace field.

The application belongs to the technical field of metal material forming, and relates to a high-strength plastic titanium-based composite material ring-shaped piece and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing titanium alloy powder and reinforcing phase powder, preparing a ring-shaped blank according to a process flow of "melting -> plasma rotating electrode atomization -> degassing and sealing welding -> hot isostatic pressing -> ring rolling", and finally performing annealing treatment on the ring-shaped blank to obtain a target ring-shaped piece. The application replaces the traditional laboratory small-batch ball milling method for preparing titanium-based composite material powder by using "large-batch mixing + vacuum induction melting rod preparation + plasma rotating electrode atomization method", so that the reinforcing phase can be introduced into the titanium matrix crystal and uniformly distributed, and the application is suitable for industrialized mass production requirements. The titanium-based composite material ring-shaped piece is prepared through the "powder metallurgy blank preparation + hot deformation" process, the size accuracy of powder metallurgy forming and the high efficiency of special-shaped ring rolling are utilized to achieve the effects of reducing the processing period, improving the material utilization rate and the forming rate.

The invention discloses an amino-modified titanium-based MOF composite material and a preparation method thereof, and belongs to the technical field of sewage treatment.The preparation method comprises the steps that graphene aerogel powder serves as a carrier, titanium-based MOF containing a Ti-O-Mn heterostructure is loaded on the surface, then dopamine polymerization is conducted to obtain amino-modified titanium-based MOF powder, the amino-modified titanium-based MOF powder serves as a cross-linking site, and the amino-modified titanium-based MOF composite material is obtained. The surface of the amino-modified titanium-based MOF powder is coated with polyimide with a three-dimensional network structure, and the polyimide has a good removal rate on heavy metals in the aspect of sewage degradation and has excellent stability and recoverability; by constructing a three-dimensional network structure, the specific surface area of the polyimide film is increased, the synergistic effect of the polyimide film and titanium-based MOF is improved, polyimide is an organic high-molecular polymer and has high chemical inertness and a stable aromatic heterocyclic structure unit, amino is fixed through high crosslinking density, and the stability of the amino is improved.

The invention discloses an electric arc additive manufacturing method of a TaC particle reinforced TC4 titanium-based composite material and application of the electric arc additive manufacturing method, and belongs to the technical field of metal-based composite material additive manufacturing. According to the method, TC4 titanium alloy serves as a base body, TaC particles serve as a reinforcement phase, interlayer slurry coating and a cold metal transition electric arc additive process are combined, and uniform dispersion and effective reinforcement of the TaC particles in the base body are achieved through accurate raw material proportioning, slurry system optimization and process parameter regulation and control. When the adding amount of TaC is 5 wt.%, the tensile strength of the composite material reaches 1024 MPa, the ductility is 8.2%, the average hardness is 351 HV0.5, the wear rate is 27.3 mg / g, and the comprehensive mechanical performance is optimal; when the addition amount is 7.5 wt.%, the average hardness is improved to 386 HV0.5, the wear rate is reduced to 20.7 mg / g, but the tensile property is reduced, so that the high-wear-resistance composite material is more suitable for high-wear-resistance scenes. The problems of TaC particle agglomeration, poor interface bonding and unbalanced toughness are solved, the process is simple, convenient and efficient, the cost is controllable, and the method is suitable for large-scale manufacturing of high-performance structural parts in the fields of aerospace, national defense equipment and the like.

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

The invention belongs to the technical field of composite material processing, and particularly relates to nano-particle reinforced titanium-based composite material powder and a preparation method. The method comprises the following steps: S1, selecting over-specification powder of which the contents of oxygen, nitrogen and hydrogen elements are lower than set values; s2, calculating a rare earth reactant adapted to be subjected to oxidation reaction based on the oxygen content of the over-specification powder; s3, the mixture of the super-specification powder and the rare earth reactant is ground for 6-12 hours; s4, the ground powder is poured into a large-size sintering mold with multiple cavities, the large-size sintering mold is put into a hot-pressing sintering furnace for high-temperature sintering, and an electrode is formed; and S5, preparing the electrode into composite material powder by adopting powder preparation modes such as gas atomization or electrode rotation. According to the method, the manufacturing cost of the nano-particle reinforced titanium-based composite material powder is reduced, and the electrode preparation process is shortened.

The invention discloses a preparation method and application of a graphene / titanium alloy electron beam cladding coating for inhibiting generation of TiC, and belongs to the technical field of titanium-based composite materials and preparation thereof. The method solves the technical problem that a TiC phase is easily generated in situ when the titanium alloy is subjected to surface enhancement by the existing graphene. According to the preparation method, the reaction of graphene and titanium alloy is inhibited through SiC, a C-Ti reaction path is inhibited from the source, and meanwhile, the depth of a molten pool is regulated and controlled by regulating and controlling electron beam current parameters, so that the dilution rate of the C element is controlled, the C element is subjected to complete solid solution in a matrix, TiC is not generated, TiC-phase-free coating preparation is realized, a graphene lamellar structure is completely reserved, and the preparation process is simple. The core advantages of self-lubrication and high mechanical strength are brought into full play, and the coating performance damage caused by TiC generation is avoided.

The application belongs to the technical field of metal matrix composite material preparation, and particularly relates to a preparation method and application of a powder for a titanium-based composite material. The powder prepared through a pre-homogenization-solidification-second powdering composite powder preparation route is highly uniform in composition, controllable in oxygen content, and good in interface bonding. The TMCs made of the powder are high in density, excellent and stable in mechanical properties. Through raw material combination and process innovation, the performance close to that of pre-alloyed spherical powder is realized at a lower cost, and the high-cost industrialization obstacle is broken. Further, the process flow of the application is stable, the yield of finished products is high, and the powder produced can be simultaneously applied to two mainstream processes of powder metallurgy and additive manufacturing, realizing "one powder for two uses", and greatly improving production flexibility and efficiency. The problems of poor uniformity and interface pollution of mechanically mixed powder, and high cost and difficult process of pre-alloyed powder are fundamentally solved.

The invention relates to a heat treatment regulation and control method for equiaxial alpha volume fraction of a laser deposition state titanium-based composite material, which comprises the following steps of: heating a sample of the laser deposition state titanium-based composite material to a heating final temperature along with a furnace, immediately cooling the sample to a cooling final temperature along with the furnace at a cooling speed of 1-15 DEG C / min, and taking out the sample from a heat treatment furnace after the sample is cooled to the cooling final temperature, thereby obtaining the equiaxial alpha volume fraction of the laser deposition state titanium-based composite material. The invention further provides a laser deposition state titanium-based composite material obtained through the method, the laser deposition state titanium-based composite material is a TiB2 reinforced Ti65 composite material, and compared with the laser deposition state titanium-based composite material, the yield strength at the room temperature is not lower than 850 MPa, and the tensile strength is not changed or slightly improved by 20-50 MPa; and under the condition that the tensile strength is not lower than 1150 MPa, the room-temperature ductility is improved by 100%-150%.

The application discloses a kind of preparation method and device of particle reinforced titanium matrix composite powder, belong to powder metallurgy technical field, the method is according to the process flow of "raw material preparation→inert gas replacement→raw material mixing→discharge and storage" preparation powder, the raw material mixing utilizes high-speed impeller mixing technology, makes nano reinforced particle uniform dispersion and adhere to titanium alloy spherical powder surface, forms the core-shell structure with titanium alloy spherical powder as core, nano reinforced particle as surface layer, avoids reinforcing phase aggregation.The device includes airtight mixing tank, high-speed impeller assembly for mixing raw materials and inert gas system communicated with the airtight mixing tank, the outer wall of tank is provided with double-layer water cooling structure for controlling the temperature in tank during mixing process.The powder prepared by high-speed impeller shear mixing method perfectly adapts to the stringent requirements of 3D printing, powder hot isostatic pressing and other high-end forming processes on powder fluidity.

The invention relates to the technical field of metal-based composite materials, in particular to a preparation method of a titanium-based composite material with a bimodal non-uniform net structure. The invention provides a preparation method of a titanium-based composite material with a bimodal non-uniform net structure, which comprises the following steps: mixing titanium alloy metal powder as a base material with nano titanium diboride, lanthanum hexaboride and a silicon powder reinforcement material through high-energy ball milling to obtain composite powder; a field-assisted sintering technology (FHP) is utilized, and a non-continuous reinforced titanium-based composite material (DRTiMCs) sintered blank is obtained; and carrying out heat preservation in a vacuum heat treatment furnace, and then carrying out a hot rolling experiment to obtain the DRTiMCs with the bimodal non-uniform network structure. The bimodal non-uniform net structure is composed of micron TiBw, nano TiBw, nano La2O3 and nano silicide, DRTiMCs of the bimodal non-uniform net structure have excellent strength and ductility, the tensile strength reaches 1544 MPa and 1560 MPa, and the percentage elongation after fracture is 7.7% and 10.2%. The DRTiMCs provide a good working idea for further development and engineering application of the composite material in the fields of aviation and aerospace.

This invention discloses an ultra-high strength and plasticity three-dimensional multi-level hybrid heterogeneous titanium-based composite material and its preparation method. The method includes: 1. performing a flow friction coating treatment on titanium alloy powder and modified amorphous cracked carbon with high active sites; 2. performing a flow friction coating treatment on modified high active and highly dispersed boron source; 3. low-temperature short-time high-pulse current-assisted vacuum hot pressing sintering; 4. multiple non-constant rate hot deformation treatments. This invention uses modified amorphous cracked carbon with high active sites and modified high active and highly dispersed boron source as reinforcing phase precursors to sequentially coat a titanium alloy powder matrix. Combined with sintering and hot deformation treatments, a multi-level, multi-scale, and multi-heterogeneous phase structure is constructed in four dimensions to obtain a three-dimensional multi-level hybrid heterogeneous titanium-based composite material, which exhibits ultra-high strength and plasticity, with a tensile strength of 1430 MPa to 1605 MPa and an elongation of 7.5% to 9%.

The invention relates to the technical field of metal-based composite materials, in particular to a nanometer lanthanum hexaboride reinforced titanium-based composite material and a preparation method of the nanometer lanthanum hexaboride reinforced titanium-based composite material. The composite reinforcements are uniformly dispersed in the titanium alloy matrix; wherein the composite reinforcement is of a core-shell structure, the core of the core-shell structure is nano lanthanum hexaboride particles, and the shell layer of the core-shell structure is an in-situ reaction layer coating the outer surfaces of the nano lanthanum hexaboride particles; the in-situ reaction layer is a transition layer with components and a structure in gradient change, and the transition layer at least comprises a La / B-rich amorphous transition region and a TiB whisker layer which are distributed from inside to outside. According to the preparation method, low-energy mixing and spark plasma sintering are adopted, controllable in-situ reaction of nano LaB6 and Ti is induced, a LaB6 core and gradient reaction layer core-shell structure composite reinforcement is constructed, and nano La2O3 particles are separated out, so that reinforcement phase agglomeration is inhibited, interface bonding is improved, and the contradiction of strong plasticity inversion is solved.

The present invention discloses a method for preparing a continuous core mesh structure wire of a titanium-based composite material for use in fused filament additive manufacturing. The method comprises the following steps: using a titanium ribbon as an outer titanium shell and a fine mesh titanium-based composite powder as a filler powder; sealing and rolling the titanium shell and filler powder, and drawing and reducing the diameter to form a continuous core mesh structure wire, and then using a fused filament additive manufacturing method to prepare an in-situ self-reinforced titanium-based composite material. This method fully utilizes the in-situ self-reinforcement reaction of the reinforcement of the continuous core mesh structure wire during the solidification process, refines the matrix grains, and precisely controls the microstructure and the size and distribution of the reinforcements. This method can improve the comprehensive mechanical properties of additively manufactured titanium-based composite materials. This method has the advantages of high design freedom and high material utilization, and provides a new method for the integrated preparation of complex components made of difficult-to-deform titanium-based composite materials.

A kind of thermomechanical method for regulating precipitated size of silicide in silicon-containing titanium-based composite material, it relates to the field of titanium-based composite material, the method of the present application is to place sintered discontinuous reinforced silicon-containing titanium-based composite material after cutting and polishing in thermomechanical machine, so that the material is uniformly distributed along the temperature distribution in the deformation direction;Thermomechanical treatment is carried out under the condition that the temperature is 600-800 DEG C and the pressure is 100-300 MPa, stop thermomechanical treatment after reaching the specified deformation, unload and air cooling, that is, complete.The present application realizes the accurate regulation of the precipitated size of silicide in titanium-based composite material by adjusting the two parameters of temperature and stress in thermomechanical treatment process simultaneously, and widens the custom interval of the precipitated size of silicide.The present application is applied to the field of in-situ autogenous titanium-based composite material organization design and regulation technology.

The invention discloses an additive manufacturing method of a high-temperature-resistant titanium-based composite material with good room-temperature strong plasticity matching, relates to the field of metal-based composite materials, and aims to solve the problem that the high temperature resistance and near-net forming cannot be considered at the same time when an existing titanium-based composite material, especially titanium alloy TA15, TiB2 and Si powder is used as a reinforced phase additive for manufacturing the titanium-based composite material. The method comprises the steps that TA15 titanium alloy powder serves as a base body, TiB2 and Si powder serves as a reinforcing phase, a titanium-based composite material is prepared through the selective laser melting technology, then annealing heat treatment is conducted, and the additive manufacturing method is completed. According to the method, the problems that the titanium-based composite material prepared through selective laser melting is poor in room-temperature plasticity and insufficient in heat resistance are remarkably improved, the microstructure of the material is improved through annealing heat treatment, residual stress is released, silicide is separated out through introduction of the Si element, the high-temperature strength of the material is improved, the room-temperature plasticity of the material is remarkably improved, and the heat-resistant temperature of the material is remarkably improved.

The invention discloses an additive manufacturing method of a titanium-based composite material capable of improving a mesh configuration of a reinforcement body, relates to the field of additive manufacturing, and aims to solve the problem of reinforcement body segregation which is difficult to avoid when the high-reinforcement-body-content mesh-configuration titanium-based composite material is prepared through additive manufacturing. The method comprises the following steps: carrying out low-energy ball milling after carrying out vacuum drying on Ti6Al4V and TiB2; carrying out vacuum drying and screening after ball milling to obtain mixed powder; and carrying out additive manufacturing, and accomplishing additive manufacturing of the titanium-based composite material for improving the mesh configuration of the reinforcement through follow-up ultrasonic assistance. The content of a reinforcing phase TiB in the net-shaped titanium-based composite material is 3.5 vol.%-5.0 vol.%. By means of the method, the net-shaped titanium-based composite material prepared through additive manufacturing can have high yield strength, high tensile strength and high plasticity at the same time at the room temperature. In addition, the technical scheme has the advantages of being short in period, low in cost and stable in process, and further development and application of the net-shaped titanium-based composite material are facilitated.

The present invention provides a method for additive manufacturing of a titanium matrix composite material, comprising the following steps: S1. Put titanium powder and reinforcing phase raw materials into the ball milling tank of a planetary ball mill, charge and discharge argon gas into the ball milling tank 3 times, and then ball mill for 3-5 h to obtain a mixed powder; S2. Place the mixed powder obtained in step S1 in a vacuum drying oven and vacuum dry for 3-6 h to obtain a dried powder; S3. Put the dried powder and binder obtained in step S2 into a 3D printer, spray the binder and perform 3D printing to form a 3D printed component; S4. Subject the 3D printed component obtained in step S3 to vacuum debinding for 0.5-1.5 h to obtain a debound 3D printed component; S5. Place the debound 3D printed component obtained in step S4 in a vacuum furnace, perform vacuum sintering and then cool with the furnace to room temperature to obtain a titanium matrix composite material. During the process of the present invention, no support needs to be added, and cracking will not be caused due to thermal stress. The reinforcing phase of the obtained titanium matrix composite material is distributed in a quasi-continuous network shape and has good mechanical properties.

The invention discloses a wear-resistant coating of a graphene reinforced titanium alloy and a preparation method and application of the wear-resistant coating, and belongs to the technical field of titanium-based composite materials and preparation of the titanium-based composite materials. The problems that an existing method for preparing the graphene reinforced titanium-based composite coating is complex in process, serious in raw material waste and the like are solved. Graphene is dispersed into a polyvinyl alcohol solution, the solution is preset on the surface of a TC4 matrix, drying and film forming are carried out, then electron beam cladding is carried out, the formed composite material coating takes the base material as a matrix source, firm metallurgical bonding is formed between the coating and the base material, and the composite material coating with high abrasion resistance is obtained. The preparation method provided by the invention is simple, and only the graphene preset on the surface of the titanium alloy needs to be cladded by electron beams; compared with traditional laser cladding, the method has the advantages that the graphene and the titanium alloy powder do not need to be subjected to ball milling treatment in advance, the preparation difficulty is greatly reduced, material loss is remarkably reduced in the machining process, and industrial production is easier to achieve.

The invention discloses a titanium-based composite undercarriage drop simulation analysis method, and relates to the technical field of aviation, and the method comprises the steps: building a buffer mechanical model of a titanium-based composite undercarriage, the buffer mechanical model covering an air spring force, an oil damping force and a structure limiting force; establishing a rigid-flexible hybrid virtual prototype model based on a multi-body dynamics method, wherein the rigid-flexible hybrid virtual prototype model realizes component integration through geometric modeling, flexible body creation and rigid-flexible coupling processing; carrying out drop test simulation, and obtaining a dynamic response curve of the undercarriage under the impact load through parameter setting and dynamics calculation; through combination of rigid-flexible coupling modeling and drop test simulation, simulation of the drop behavior of the titanium-based composite undercarriage is realized. According to the method, the test cost can be reduced, the research efficiency is improved, and the method has important engineering significance for lightweight and high-performance design of the undercarriage.

The application discloses a kind of local reinforcement selected area laser melting deposition high-strength titanium alloy preparation method and system, belong to additive manufacturing technical field.The local reinforcement selected area laser melting deposition high-strength titanium alloy preparation method provided by the application, by establishing target titanium alloy structure three-dimensional model and carrying out finite element limit load simulation analysis, stress distribution and potential dangerous area are identified;Based on the analysis result, the performance requirement is divided, the material enhanced local area is determined, and the laser scanning path and powder feeder movement trajectory are planned;Path file is imported into composite equipment to set process parameters;Titanium-based composite material powder is selectively laid in the enhanced area, and a locally reinforced structure is obtained by selective laser melting.The scheme realizes the spatial selective distribution of powder composition, forms a uniform distribution of high-stress areas, significantly improves the local strength and maintains the overall strength and plasticity matching, effectively solves the problem of insufficient performance matching of titanium alloy components under complex load.

The application discloses a high-wear-resistance additive forming titanium-based composite material and a preparation method thereof. The high-wear-resistance additive forming titanium-based composite material is mainly composed of a matrix and an amorphous ceramic film, and the mass fraction of each component of the high-wear-resistance additive forming titanium-based composite material is as follows: the matrix is 97.0-99.8%, and the amorphous ceramic film is 0.2-3%. The application can realize the quantity and size regulation of the reinforcing phase by precisely controlling the thickness and mass of the amorphous ceramic film. The introduction of the amorphous ceramic film can significantly improve the flowability and oxidation resistance of the additive manufacturing titanium alloy powder. The in-situ self-grown ceramic reinforced titanium-based composite material prepared by additive manufacturing is crack-free, has high hardness and good wear resistance, and is suitable for use under harsh working conditions.