210 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 preparation of a titanium-based composite material continuous core net structure wire material for fuse wire additive manufacturing. Comprising the following steps: taking a titanium belt as an external titanium shell, and taking fine net-shaped titanium-based composite material composite powder as filling powder; and the titanium shell and the filling powder are rolled in a sealed mode, drawing and diameter reducing are conducted, a continuous core net structure wire is formed, and then the in-situ synthesis reinforced titanium-based composite material is prepared through a fuse wire additive manufacturing method. According to the method, the in-situ synthesis reaction of a reinforcement body of the continuous core net structure wire in the melting process is fully played, matrix grains are refined, the organization structure and the size and distribution of the reinforcement body are accurately regulated and controlled, the comprehensive mechanical property of the additive manufacturing titanium-based composite material can be improved, and the method has the advantages of being high in design freedom degree, high in material utilization rate and the like; and a new method is provided for integrated preparation of the difficult-to-deform titanium-based composite material complex component.

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 discloses nano rare earth oxide-containing titanium-based composite powder for 3D printing. The nano rare earth oxide-containing titanium-based composite powder comprises the following components in percentage by mass: 5.0%-7.0% of aluminum, 1.0%-3.0% of tin, 3.0%-5.0% of zirconium, 0.1%-3.0% of molybdenum, 0.2%-1.0% of silicon, 1.0%-3.0% of rare earth elements, 0.01%-0.05% of boron, 0.1%-0.5% of oxygen and the balance of titanium. The invention further discloses a preparation method of the titanium-based composite powder, according to the method, a vertical ingot pulling technology is adopted, so that the defects such as inclusions and air holes in a melt are reduced, meanwhile, the size and distribution of rare earth oxide are uniform, and then nano-scale rare earth oxide particles are uniformly dispersed and separated out through rapid solidification. The nano-particles are not prone to causing stress concentration while hindering dislocation slippage, and coordination matching of the obdurability of the titanium-based composite material is expected to be further improved.

The invention discloses a graphene modified high-entropy alloy particle reinforced titanium-based composite material and a preparation method and application thereof. According to the composite material, titanium or a titanium alloy serves as a titanium matrix, and graphene is modified on the surface of a high-entropy alloy and serves as a reinforced phase together with the high-entropy alloy to be distributed at the grain boundary of the titanium matrix. In the microstructure of the material, the surface of the high-entropy alloy is modified with graphene, the interface of the high-entropy alloy and a titanium matrix and the solid solution degree of the high-entropy alloy in the titanium alloy matrix are regulated and controlled, and the graphene reacts with the matrix to generate titanium carbide to jointly reinforce the titanium alloy matrix with the high-entropy alloy. According to the preparation method, the graphene is modified on the surfaces of the high-entropy alloy particles by adopting a three-dimensional rotary mixing method, the problem that impurities are easily introduced in a conventional ball milling method is solved, and the graphene-modified high-entropy alloy particle reinforced titanium-based composite material block is obtained through sintering or laser 3D printing forming. The material has high strength and high plasticity, has excellent comprehensive mechanical properties, and can be applied to the fields of aerospace, ships and naval vessels and the like.

The invention belongs to the technical field of titanium-based thin-wall component machining, and discloses a method for machining a high-temperature-resistant titanium-based thin-wall component through cold spraying additive-hot pressing and the like. A titanium-based layered gradient structure prefabricated blank is prepared mainly through a cold spraying method, and machining of the high-performance and high-temperature-resistant titanium-based thin-wall component is achieved in combination with a subsequent equal material technology. The processing and preparing process comprises the steps that the component content of the titanium-based composite powder is determined; preparing composite powder; carrying out cold spraying additive printing to obtain a layered gradient preformed thin-wall blank; and carrying out reaction hot pressing to form the high-temperature-resistant thin-wall component. By means of the method, high-production-efficiency, low-cost and high-performance manufacturing of the high-temperature-resistant layered gradient titanium-based composite material or the titanium-aluminum intermetallic compound thin-wall component can be achieved; the high-temperature-resistant thin-wall component with the maximum service temperature of 800 DEG C can be machined and prepared according to the target service temperature requirement, and customization of the service performance can be achieved according to the mechanical property requirement of the component.

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 relates to a preparation method of an ultra-dispersion nano titanium carbide particle reinforced titanium-based composite material, which comprises the following steps: carrying out die forming on mixed powder of sub-ten nano-scale graphene and a titanium matrix, carrying out vacuum microwave sintering, and carrying out extrusion thermal deformation treatment to obtain the ultra-dispersion nano titanium carbide particle reinforced titanium-based composite material. The microstructure reveals that the nano-scale titanium carbide particles generated by the in-situ reaction are uniformly distributed in the matrix crystal. The prepared ultra-dispersed nano titanium carbide reinforced titanium-based composite material shows excellent mechanical properties and has excellent strength and plasticity, the tensile strength at the room temperature can reach 1030-1150 MPa, and the performance is obviously improved compared with pure titanium.

The invention relates to a gap strengthening titanium-based composite material with room-temperature strength and plasticity matched with high-temperature strength and a preparation method of the gap strengthening titanium-based composite material, and belongs to the technical field of titanium-based composite materials. In order to solve the problem that an existing method for introducing interstitial elements into a titanium-based composite material is difficult to achieve uniform distribution of the interstitial elements, the method comprises the steps that firstly, interstitial element additive powder, reinforced phase reactant powder and titanium alloy matrix powder are mixed and subjected to ball milling to obtain raw material powder, and the raw material powder is prepared into a raw material bar through hot pressing sintering or hot isostatic pressing; preparing the raw material bar into interstitial element reinforced titanium-based composite powder through plasma rotating electrode atomization powder preparation; and finally, the obtained titanium-based composite powder is subjected to hot pressing sintering or hot isostatic pressing, and the gap strengthening titanium-based composite material is obtained. According to the method, the interstitial elements are introduced into the titanium-based composite powder in situ, the content and distribution of the interstitial elements are accurately regulated and controlled, the obtained series of titanium-based composite materials have good strength and plasticity matching at the room temperature, and the high-temperature strength is also greatly improved.

The invention discloses a forming device and a forming method for manufacturing a reticular titanium-based composite material hollow structural part through current-assisted diffusion bonding / hot gas expansion, belongs to the field of material processing engineering, and aims to solve the problems that a titanium-based composite material is prone to damage in the forming process and the rejection rate is high due to the fact that the hardness of the titanium-based composite material is too high. The advantages of current-assisted diffusion bonding, hot gas expansion and the titanium-based composite material are ingeniously fused, the self characteristics of the material are optimized by means of current assistance, the stability and reliability of the bonding part are ensured by means of diffusion bonding, an ideal hollow appearance is formed by means of a hot gas expansion process, and through synergistic force generation, the bonding effect is improved. The processing problem of the titanium-based composite material is successfully solved, a solid technical foundation is built for the high-end manufacturing industry, and a powerful support guarantee is provided. The device and the method are mainly used for preparing the reticular titanium-based composite hollow structural member.

The invention relates to the technical field of titanium-based composite material preparation, and discloses a micro-nano multi-scale high-entropy alloy reinforced titanium-based composite material and a preparation method thereof, the composite material is a titanium-based composite material which takes pure titanium as a matrix and is synergistically reinforced by micron-scale and nano-scale high-entropy alloy reinforced particles; the preparation method comprises the steps that uniform mixing of titanium powder and high-entropy alloy reinforced particles is achieved through ball milling, then the mixed powder is made into a high-density blocky blank through the cold isostatic pressing technology and the hot isostatic pressing technology, and finally the micro-nano multi-scale high-entropy alloy reinforced titanium-based composite material is prepared through the current-assisted friction stir processing technology. The nanoscale high-entropy alloy enhances particle dispersion strengthening distribution, the grain size of a matrix is refined, and the strength of the material is remarkably improved; the micron-sized high-entropy alloy particles and the matrix form a core-shell structure interface, interface bonding is improved, stress distribution is adjusted, and the high plasticity of the material is improved. The micro-nano multi-scale synergistic effect effectively enhances the mechanical property of the titanium-based composite material.

The invention relates to the technical field of titanium-based composite material metallographic corrosion, in particular to a titanium-based composite material metallographic corrosion liquid and a metallographic corrosion method. The metallographic etchant comprises hydrofluoric acid, sulfuric acid, nitric acid and distilled water in a volume ratio of (3.5-4.5): (1.5-2.5): (5.5-6.5): 100. The corrosion method comprises the following steps: manufacturing a metallographic specimen of the titanium-based composite material; sequentially carrying out grinding treatment and polishing treatment on the metallographic specimen; dropwise adding the metallographic etchant onto the polished surface of the metallographic sample, and carrying out corrosion treatment; the metallographic specimen subjected to corrosion treatment is subjected to washing and blow-drying treatment; and carrying out metallographic detection on the washed and blow-dried metallographic sample. After the titanium-based composite material is corroded, a high-quality metallographic structure which is clear in grain boundary, complete in grain and uniform in corrosion can be presented.

The invention relates to a shot peening method for strengthening the mechanical property of a laser additive manufacturing titanium-based composite material, which comprises the following steps of: performing single-pass shot peening on the surface of the titanium-based composite material under the conditions that the air pressure is 0.1-0.25 MPa and the shot peening time is 3-10 minutes, and removing residual shots on the surface of the titanium-based composite material after the shot peening is finished, the tensile strength of the reinforced titanium-based composite material at the room temperature is improved by 50-100 MPa from 1152.76 MPa in an initial printing state. According to the shot blasting treatment provided by the invention, residual compressive stress is introduced by bombarding the metal surface through small particles, the surface structure is subjected to plastic deformation, grains on the outermost surface are remarkably refined, and the mechanical property of the titanium-based composite material manufactured by laser additive manufacturing is effectively improved at low cost.

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 a method for improving the mechanical property of a powder core wire electric arc additive titanium-based composite material. The invention relates to a method for improving the mechanical property of a powder core wire electric arc additive titanium-based composite material. The invention aims to solve the problems that a component printed by the existing titanium-based powder core wire has air hole defects and is poor in plasticity, toughness and fatigue performance. The method comprises the following steps: 1, adding the titanium-based composite material to the powder core wire material through electric arc; 2, cleaning a printed piece; 3, hot isostatic pressing; and 4, heat treatment. The method is used for improving the mechanical property of the powder core wire electric arc additive titanium-based composite material.

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 a method for regulating and controlling an additive manufacturing submicron titanium-based composite material through an ultrasonic energy field, and belongs to the field of additive manufacturing of titanium-based composite materials. According to the method, superfine ceramic powder is adopted as a reinforcement material of the composite material, the superfine ceramic powder and titanium alloy matrix powder are mixed and dried, and the submicron titanium-based composite material is prepared through the laser melting deposition technology; in the preparation process, an ultrasonic tool head is placed on a deposition layer behind a molten pool, an ultrasonic energy field is synchronously applied to the surface of a sample, and composite material grain refinement is achieved through double influences of the ultrasonic energy field on the molten pool and the deposition layer. Ultrasonic waves are transmitted into a molten pool to generate acoustic streaming and cavitation effects, so that the molten pool is stirred, uniform distribution of C atoms is promoted, the temperature gradient of the molten pool is reduced, uniform nucleation of TiC and betaTi is promoted, and epitaxial growth of TiC and betaTi is delayed; ultrasonic waves act on a high-temperature deposition layer to generate plastic deformation, recrystallization is triggered, alpha Ti is refined, and refining of microstructures of a reinforcement body and a base body is promoted.

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.