29 results about "Titanium matrix composites" patented technology

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 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.

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 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.

This invention discloses an in-situ self-generated TiBw and TiCp synergistically reinforced bi-matrix heterostructure titanium matrix composite material prepared by powder metallurgy, and its preparation method. This invention aims to solve the problems of "strength-plasticity mismatch" and insufficient dynamic impact energy absorption efficiency in traditional titanium alloys and their composites. The composite material uses pure Ti as the soft phase, TC4 as the hard phase, and B4C particles as the reinforcing precursor. It can be formed by low-energy ball milling, vacuum drying, rapid hot pressing sintering, and heat treatment, without subsequent rolling or forging. B4C reacts in-situ with the matrix to generate TiBw (TiBw) and TiCp (TiCp), constructing a discontinuous in-situ self-generated bi-scale TiBw and TiCp synergistically reinforced heterostructure at the soft-hard phase interface, achieving a significant synergistic effect of strengthening and toughening. The prepared composite material has a quasi-static tensile strength of 1085 MPa and a fracture strain of 16.3%; at 3000 s⁻¹, the tensile strength is 1085 MPa. ‑1 The dynamic compressive strength under strain rate reaches 1562 MPa, with a true strain of 27.8% and an energy absorption efficiency of 408 MJ / m³. This composite material achieves synergistic optimization of high strength, high plasticity, and high energy absorption through mechanisms such as twinned coordinated plasticity, multi-stage whisker fracture energy dissipation, and adiabatic shear band suppression. The invention features a simple process and low cost, making it suitable for the fabrication of lightweight, high-impact-resistant structural components for aerospace, armor protection, and other applications.

The application discloses a kind of solid solution strengthening net structure super high strength and toughness titanium matrix composite and preparation method thereof, which comprises: one, sequentially with titanium alloy matrix powder of nanometer carbide containing beta stabilizing element and nanometer carbon source / boron source are mixed by multi-step low-energy ball milling;Two, after densification rapid sintering, titanium matrix composite is obtained by hot deformation processing.The application uses multi-step low-energy ball milling mixing, by carbide introduction beta stabilizing element solid solution strengthening intracrystalline titanium matrix, using nanometer carbon source / boron source and the interface reaction product of titanium is formed TiC p Or TiB w Surrounding the discontinuous net structure of grain boundary strengthens grain boundary, while high-density acicular alpha" precipitated phase is precipitated in equiaxial beta-Ti matrix during hot deformation processing, the solid solution strengthening net structure makes titanium matrix composite have super high strength and excellent room temperature elongation, realizes the matching of strength and plasticity, and the method is simple, easy to realize, suitable for aerospace titanium alloy structural materials.

The application discloses a Sn / Y synergistically micro-alloyed graphene / TC4 composite material and a preparation method thereof, and belongs to the technical field of graphene / titanium-based composite material preparation. In order to solve the problems of the strength and plasticity synergy of the graphene / TC4 composite material, Sn powder, Y2O3 powder and TC4 powder are uniformly mixed, then the mixed powder is added into a ball mill tank, and graphene powder is added in batches to carry out multiple ball milling to obtain a composite powder; a mold filled with the composite powder is placed in a sintering furnace, an axial pressure of 40-45 MPa is applied to the mold, and plasma sintering treatment is carried out to obtain a sintered composite material blank; the sintered composite material blank is subjected to oxidation scale removal, round billet processing and sandpaper polishing to obtain a hot-rolled initial sample; and multi-pass rolling is carried out until the total reduction is 75%, and then air cooling is carried out to room temperature to obtain the composite material. The application strengthens the grid structure by changing the second phase distribution of the interface, so that the overall properties of the graphene / TC4 composite material are improved.

This invention proposes a method for preparing continuous SiC fiber reinforced titanium matrix composite plates, comprising the following steps: Step 1, weaving of SiC fiber cloth; Step 2, pretreatment of SiC fiber cloth; Step 3, molding of continuous SiC fiber reinforced titanium matrix composite plates. This invention effectively avoids the problems of high interfacial reaction and poor composite material performance encountered in traditional methods; it also avoids the SiC fiber stacking problem that occurs in the preparation of continuous SiC fiber reinforced titanium matrix composite plates using traditional methods. This method is simple, easy to implement, has a short cycle time, low cost, strong practicality, and is conducive to industrialization.

The application discloses a titanium matrix composite landing gear ejection simulation analysis method and belongs to the technical field of aviation. The method solves the problem that the titanium matrix composite landing gear is difficult to accurately characterize the mechanical behavior under the ejection working condition due to high actual test cost and limited conditions. The method establishes a landing gear buffer mechanical model and distinguishes the rigid part and the flexible part, constructs a rigid-flexible coupling virtual prototype model of the front landing gear, and performs ejection working condition dynamics simulation to simulate the dynamic response and stress characteristics in the protruding process. The application can accurately simulate the actual test working condition, avoid high cost and risk, and provide an important reference for landing gear structure optimization and performance improvement.

The application belongs to the technical field of photocatalysis, and particularly relates to a substructure-controllable penicillium crustosum template titanium-based composite material and a preparation method and application thereof. The application uses cheap and easily obtained penicillium crustosum with high silicon content as a biological template, and uses potassium fluoride and glycerol as a regulator to realize multi-element step-by-step complex regulation of the substructure of the composite material. The addition of potassium fluoride makes K 1.28 Ti8O 16 , K2Ti6O 13 appear, and form a ternary heterojunction with anatase TiO2, so as to realize the substructure regulation of the penicillium crustosum template titanium-based composite material. The application first proposes the ternary heterojunction, and introduces the penicillium crustosum biological template with high silicon content, so that the adsorption performance and visible light catalytic performance are both optimized, and the complex structure is achieved. The composite material is used as a catalyst to degrade tetracycline under visible light, the method used is simple and convenient, is suitable for expanding the production scale, and has a good application prospect.

This invention relates to the field of titanium matrix composite material processing, and more particularly to a single-step solution plasticization method for whisker-reinforced titanium matrix composite rods. The method involves placing the pre-structured whisker-reinforced titanium matrix composite rods, after thermoplastic deformation treatment, into a vacuum heat treatment furnace. Under vacuum conditions, the rods are heated to 1030-1090°C at a heating rate of 5-20°C / min, held at that temperature for 30 min-4 h, and then water-cooled to room temperature within 1-5 s. This single-step solution treatment yields the plasticized, single-step solution-treated titanium matrix composite rods. While maintaining the refined microstructure and load-bearing capacity of the reinforcement, the single-step solution treatment reduces initial dislocations to increase work hardening to 160-180 MPa and elongation to 9.5%-12.5% ​​while keeping the yield strength unchanged, thus achieving a simultaneous increase in tensile strength and elongation.

This invention discloses a multi-scale heterogeneous high-strength ductile titanium-based composite material and its preparation method. The titanium-based composite material comprises a pure α-phase titanium matrix, an α+β biphase induced by the diffusion of titanium matrix and TiC reinforcing elements, and a TiC reinforcing phase; its tensile strength is 1020-1055 MPa, and its elongation after fracture is 14-18%. It is obtained by ball milling, plasma sintering, and hot rolling of pure titanium powder and (TaTiV)C multi-component carbide ceramic nanoparticles. This invention constructs a multi-scale heterogeneous structure in the titanium-based composite material by adding a multi-component carbide ceramic reinforcing phase and combining it with a β-stabilizing element-induced local β-phase transformation, thereby improving the elongation of the material while maintaining high strength.

This invention provides a (TiC+TiB)TC4 titanium-based composite material and its preparation method, which possess both high strength and wear resistance as well as high plasticity, belonging to the technical field of titanium alloy materials. The (TiC+TiB)TC4 titanium-based composite material, by weight percentage, has the following chemical composition: Al: 5.5–6.8%, V: 3.5–4.5%, B: 0.042–0.085%, C: 0.0114–0.063%, x: 0.1–8%, where x is any one or a combination of at least two of the typical β-phase stable elements Fe, Mn, Cr, Ni, Cu, and Nb; the balance is Ti. This invention innovatively proposes a design concept that couples precise composition control with a composite hot deformation process, effectively controlling the wear resistance and plasticity of the titanium-based composite material. This ultimately achieves an ideal match between high strength and wear resistance and good plasticity, meeting the requirements for wear resistance and plasticity under dynamic friction conditions. It solves the technical problem of existing titanium-based composite materials failing to effectively coordinate high strength and wear resistance with good plasticity under dynamic friction conditions.

This invention relates to the field of wear-resistant and corrosion-resistant centrifuge scrapers, specifically a wear-resistant and corrosion-resistant titanium-based composite centrifuge scraper and its preparation method. First, a vacuum consumable arc melting method is used to generate dispersed TiB whiskers and TiC particle reinforcing phases in situ within a Ti6Al4V alloy matrix, thereby improving the wear resistance of the titanium alloy. Then, the prepared ingot is centrifugally cast into a centrifuge scraper using a vacuum investment casting method. Addressing the problem of rapid wear caused by long-term scraping of salt slag layers on the scraper blade, this invention further utilizes laser cladding technology to form a gradient in-situ generated carbide layer on the blade surface, further improving the wear resistance of the centrifuge scraper. The centrifuge spiral scraper prepared by this method can meet the requirements for conveying high-halogen salts and corrosive solid-liquid two-phase substances and can be widely used in chlor-alkali, salt production, and coal chemical industries.

The application discloses a preparation method of a refractory TaNb and TiC synergistically reinforced near-alpha titanium matrix composite material, and the method comprises the following steps: firstly, TaC ceramic powder, NbC ceramic powder, carbon black powder and titanium-based powder are ball-milled and mixed to obtain titanium-based composite powder wrapped by TaC, NbC and carbon black; and secondly, a refractory TaNb and TiC synergistically reinforced near-alpha titanium matrix composite material is obtained by spark plasma sintering. In the application, the TaC and NbC ceramic powder is used as the refractory element Ta, Nb source and carbon source, the carbon black powder is used as an additional carbon source, the different carbon sources are used to generate the small-size TiC ceramic phase which is distributed in a net-like and staggered manner and dispersedly in situ, the size distribution of the TiC ceramic phase is regulated, the solid solution strengthening effect of the refractory elements Ta and Nb on the matrix is synergistically improved, the room-temperature strength and high-temperature strength plasticity of the coupled reinforced near-alpha titanium matrix composite material are realized, and certain room-temperature processing performance is reserved.

The application discloses a preparation method of a TiB2 reinforced titanium matrix composite, and relates to the technical field of materials, and comprises the following steps: vacuum drying treatment is performed on titanium powder, amorphous boron powder and rare earth element powder respectively; the titanium powder, the amorphous boron powder and the rare earth element powder after the vacuum drying treatment are ball milled to obtain mixed powder; the mixed powder is compacted, spark plasma sintered and cooled to obtain the TiB2 reinforced titanium matrix composite; wherein the spark plasma sintering adopts at least three-stage gradient heating; the first stage is to heat from room temperature to 600 DEG C to 700 DEG C; the second stage is to heat from 600 DEG C to 700 DEG C to 850 DEG C to 950 DEG C; and the third stage is to heat from 850 DEG C to 950 DEG C to 1000 DEG C to 1100 DEG C. The TiB2 reinforced titanium matrix composite is prepared by adopting a combination mode of in-situ reaction and SPS rapid sintering, the amorphous boron powder and the titanium powder generate TiB2 particles in-situ at a lower temperature, and the problems of TiB2 particle agglomeration and poor interface bonding in an external adding method are effectively solved.

The application discloses a kind of heat treatment solid solution coupling reinforced near α titanium matrix composite material and its preparation method, which comprises the following steps: one, near α titanium matrix powder is mixed with carbon black powder, TaC and NbC ceramic powder ball milling;Two, discharge plasma sintering;Three, high-temperature solid solution heat treatment and quenching;Four, aging heat treatment and cooling;Five, hot rolling.The application simultaneously uses α-Ti stabilizing element C and β-Ti stabilizing element Ta, Nb as additive element, cooperates to use high-temperature solid solution heat treatment and aging heat treatment process, realizes the coupling reinforcement between each part by adjusting the size morphology distribution of reinforcing phase and titanium alloy matrix, improves the strength of titanium alloy matrix, improves the physical incompatibility of titanium alloy matrix and ceramic phase, so as to improve the mechanical properties of near α titanium matrix composite material, higher than the mechanical properties of traditional titanium matrix composite material, suitable for aerospace field.

The application discloses a titanium base surface super wear-resistant micro-arc oxidation coating and a preparation method thereof, and a titanium base composite material, and belongs to the field of titanium coating preparation.The coating has a double-layer structure; the content of F elements in the inner layer of the coating is greater than that in the outer layer, the content of Zr elements in the inner layer is less than that in the outer layer, and the content of Zr elements in the outer layer is greater than 30 wt%. The fluorozirconate-based electrolyte is combined with micro-arc oxidation, the problem that a ZrO2-based micro-arc oxidation coating cannot be formed in situ on the surface of an alloy in a uniform distribution through exogenous incorporation in the prior art is solved, the prepared coating can have the characteristic of compactness when the thickness reaches 70 microns, and the wear resistance and service life of the coating are significantly improved.

This invention relates to the field of titanium-based composite material preparation technology, specifically to a method for preparing a reinforcing phase titanium-based composite material. The method uses spherical TC4 powder as raw material, firstly achieving surface activation and pre-strengthening of the powder through vacuum ion carburizing, then uniformly mixing it with B particles, and finally generating a TiB short fiber reinforcing phase through in-situ reaction by spark plasma sintering. Combined with subsequent heat treatment and hot rolling densification, a TiB-reinforced titanium-based composite material is finally obtained, wherein the TiB reinforcing phase has a volume fraction of 5 vol.%–8 vol.% and is uniformly dispersed within the TC4 matrix. This invention optimizes the morphology and distribution of the reinforcing phase and strengthens interfacial bonding through a process combining surface carburizing activation and in-situ reinforcement, simultaneously achieving a low coefficient of friction, high wear resistance, and excellent mechanical properties in the material.

The present application relates to a kind of titanium matrix composite sheet with equiaxed structure and its heat treatment method, comprising the following steps: on the side of pure titanium plate and / or titanium alloy plate and titanium matrix composite sheet contact, coating stop solder, as the upper and lower cladding of sandwich titanium matrix composite sheet;The upper and lower cladding are placed in the uppermost layer and the lowermost layer of titanium matrix composite sheet or titanium matrix composite sheet stack respectively;The stack of the above-mentioned step is sealed after being placed as a whole, then vacuumizing, obtain the cladding with vacuum inside;The cladding with vacuum inside is heat treated, obtain the titanium matrix composite sheet with equiaxed structure;The titanium matrix composite sheet with equiaxed structure is diffusion connected;Its purpose is to realize the diffusion connection of high welding rate, reach the purpose of high quality weld and superplastic deformation capacity.

This invention discloses an in-situ self-generated titanium-based composite additive manufacturing method based on multi-strand filaments, comprising the following steps: using aluminum-based composite filaments as core filaments; using pure titanium or titanium alloy filaments as outer filaments; mixing and twisting the core and outer filaments together; and preparing in-situ self-generated reinforced titanium-based composites using a fused wire additive manufacturing method. This method refines the matrix grains and reinforcement size through the in-situ self-generated reaction during the melting and solidification process of the multi-strand titanium-based composite filaments, enabling precise control of the reinforcement size distribution. This significantly improves the strength and toughness of the additively manufactured titanium-based composites. This method and technology can help guide the direct preparation of high-strength and high-toughness titanium-based composites and their components using fused wire additive manufacturing, and has significant application value in aerospace and other critical equipment fields.

The application discloses a high-strength and high-toughness heat-resistant titanium alloy composite material and a preparation method thereof, and relates to the technical field of high-strength and high-toughness structural metal matrix composite materials. The preparation method comprises the following steps: ball-milling and mixing nano-SiC particles and TA15 alloy matrix raw materials, and then performing discharge plasma sintering treatment and multi-pass hot rolling treatment to obtain the high-strength and high-toughness heat-resistant titanium alloy composite material. Through the synergistic effect of vacuum high-energy ball milling, discharge plasma sintering and high-temperature hot rolling, the high-strength and high-toughness heat-resistant titanium alloy composite material is prepared. The synergistic effect of fine-grain strengthening, dislocation strengthening, solid solution strengthening and Orowan strengthening effect makes the prepared composite material exhibit excellent mechanical properties, and effectively solves the problem that the strength and plasticity of the titanium-based composite material cannot be synergistically improved.

The application discloses a graphene / TA1 composite material and a preparation method thereof, and belongs to the technical field of graphene / titanium-based composite material preparation. In order to solve the problem of the rolled high-strength plastic graphene / TA1 composite material in a high-load service environment, Sn powder, Y2O3 powder and TA1 titanium alloy powder are uniformly mixed, then the mixture is added into a ball mill tank, graphene powder is added in batches, and multiple ball milling is carried out to obtain a composite powder; a mold filled with the composite powder is placed in a sintering furnace, an axial pressure is applied to the mold, and plasma sintering treatment is carried out to obtain a sintered composite material blank; the sintered composite material blank is subjected to oxidation scale removal and round billet cutting treatment, and then is subjected to sandpaper polishing to obtain a hot rolling initial sample; and multiple pass rolling is carried out until the total reduction is 75%, and then air cooling is carried out to room temperature to obtain the graphene / TA1 composite material. The application improves the overall properties of the high-strength plastic graphene / TA1 composite material.

The application discloses a titanium matrix composite landing gear buffer fluid-structure coupling and modeling method, and belongs to the technical field of landing gear buffer fluid-structure coupling modeling calculation in the field of aviation. The prior art has the problems of insufficient simulation accuracy and imperfect material characteristic representation. The application integrates the finite element method and the finite volume method based on the ADINA software, establishes a buffer structure model and an internal oil fluid model, sets load and boundary conditions, performs bidirectional coupling solution in a fluid-structure coupling solver, and extracts dynamic response parameters such as buffer force-displacement curves. The application realizes high-precision simulation of the fluid-structure coupling effect of the buffer under impact load, the simulation result is highly consistent with the physical test, and the error is less than 5%, and is used for buffer performance evaluation and optimization design.

This invention relates to a method for preparing W-surface-modified graphene nanosheets using a molten salt method. The invention aims to address the problem of poor interfacial interaction between graphene and the matrix in metal-based composite materials. The method comprises: 1. Functionalizing the graphene surface; 2. Preparing a mixed salt; 3. Mechanically mixing WO3 particles with the surface-functionalized graphene until homogeneous; spreading the mixed powder evenly at the bottom of a crucible and covering the surface with the mixed salt; 4. Placing the crucible in a heat treatment furnace for graphene surface modification; 5. Removing the reactants from the crucible, rinsing with distilled water and filtering, separating the W-surface-modified graphene, and drying it to complete the preparation of W-surface-modified graphene nanosheets using the molten salt method. This method is simple and provides good surface modification. Taking titanium-based composite materials as an example, surface modification effectively suppresses severe interfacial reactions between graphene and the titanium matrix, allowing graphene to be retained.

This invention discloses a method for preparing nano-reinforced titanium-based composite materials based on a high-energy, low-speed forming combined with a high-energy, high-speed remelting process. The high-energy, low-speed scanning process during laser forming allows for the complete melting of micron-sized ceramic particles in the titanium matrix, resulting in the growth of precipitated ceramic dendrites. The solidified titanium-based composite material is then subjected to high-energy, high-speed remelting, which further refines the ceramic dendrites in the titanium matrix, generating a nanophase. This increases the uniformity and density of the nanophase within the matrix, maximizing the strengthening effect of the nanosolid solution and improving the material's mechanical properties.

This invention relates to the field of surface modification technology for metallic materials, and discloses an in-situ self-generated TiC-reinforced wear-resistant coating and its preparation method for an integrated titanium-nickel joint. The method includes: the coating is bonded to the surface of a titanium-based composite matrix, and an in-situ chemical reaction is performed between TC4 alloy powder and graphite powder under laser melting conditions to generate a TiC-reinforced phase with a volume fraction of 20 vol% to 50 vol%. This phase is distributed in a dendritic or network structure, which improves the coating hardness while buffering residual stress from the metallic matrix. The integrated titanium-nickel joint is brazed by laying a Cu solder layer between the interface of the titanium-based material and the nickel-based alloy. The Cu layer blocks the contact diffusion of Ti atoms and Ni atoms, inhibits the formation of brittle intermetallic compounds, and absorbs interfacial mechanical deformation energy. This invention balances the shear strength and surface wear resistance of the titanium-nickel dissimilar joint.