402 results about "Metal matrix composite" patented technology

The present application relates to the technical fields of laser additive manufacturing, and discloses a kind of metal matrix composite composite additive manufacturing methods, comprising: the mixing of pre-prepared composite powder, substrate pretreatment, laser bottom layer cladding preparation bottom layer structure;Electron beam selective melting additive preparation main functional layer, obtain rough parts;Rough parts post-processing.The present application improves the wettability between metal matrix and TiC reinforcing phase through the transition effect of laser cladding bottom layer and hot isostatic pressing post-processing, improves the interface bonding strength, avoids the interface peeling problem under load;Through laser cladding, realize rapid bottom layer forming, electron beam selective melting ensures high-precision functional layer manufacturing, and is suitable for the integrated manufacturing of complex structure (such as hollow, thin-walled) metal matrix composite parts.

The invention discloses an enhanced metal-based composite water purifying agent and a preparation method thereof, belongs to the technical field of preparation of water purifying agents, and aims to solve the technical problem that the flocculation capacity and the stability of a composite water purifying agent in the prior art need to be further improved. The preparation method specifically comprises the following steps: preparing a water purifying agent skeleton dispersion liquid by using chitosan and sodium alginate; chitosan-sodium alginate is used as a porous framework, a polyphenol-multi-metal complex is loaded, a structure is enhanced through Ca < 2 + > crosslinking, then SiO2 is used for coating to improve acid and alkali resistance and stability, and finally PAC is introduced to realize rapid flocculation. In the preparation process, the organic framework, the metal complex and the inorganic coating layer are fully compounded through pH control and step-by-step dropwise adding, and the obtained composite water purifying agent can efficiently remove phosphorus, chromium and suspended solids in water and shows a remarkable synergistic purification effect and storage stability.

The invention belongs to the technical field of metal-based composite material additive manufacturing, and particularly relates to a graphene titanium-based composite material additive manufacturing method based on machine learning, and the graphene titanium-based composite material additive manufacturing method based on machine learning comprises the following steps: collecting and preprocessing multi-modal data; constructing a multi-target prediction GNN model and carrying out model training and evaluation to obtain an optimal GNN model; the optimal GNN model is optimized through a second-generation non-dominated sorting genetic algorithm, and a multi-objective optimization result is obtained; a qEHVI Bayesian optimization algorithm is adopted to screen out an optimal parameter group from the multi-target optimization results; and 3D printing verification and closed-loop iteration are carried out. According to the method, machine learning prediction, 3D printing verification and data feedback are integrated into a closed-loop iteration system, dynamic optimization of'parameter recommendation-> 3D printing-> performance testing-> model updating 'and autonomous optimization of material performance are achieved, and research and development efficiency is remarkably improved.

The invention belongs to the technical field of metal-based composite materials, and particularly relates to a method for integrally preparing complex-shaped tungsten-copper alloy through injection molding and sintering, which comprises the following steps: mixing and preheating tungsten powder and copper powder; preparing a composite plasticizer matrix, mixing and granulating to obtain a granular mixed material; injecting the granular mixed material into a cavity of a steel mold through an extruding machine at the temperature of 150-200 DEG C; cooling and demolding to obtain a molded blank; the obtained formed blank is heated to 800-900 DEG C at the heating speed of 100-200 DEG C / h, and presintering is conducted for 1-2 h; and the pre-sintered formed blanks are arranged in a graphite boat at intervals, landfill and compaction are carried out through emery, then the formed blanks are heated to 1400-1450 DEG C, heat preservation is carried out for 2-2.5 h, and sintering and post-treatment are carried out. The method provided by the invention effectively solves the technical problems that an infiltration link is needed in a traditional production mode of the material, the material is not uniform, the mechanical and electrical properties are low, and a complex structure is difficult to directly form.

The invention discloses a dispersion distribution method for a micro-nano multi-scale mixed SiC particle reinforced phase in an aluminum-based composite material and the composite material, and relates to the technical field of metal-based composite material preparation. The method comprises the following steps: firstly, carrying out ultrasonic cleaning, ultrasonication and two-stage high-temperature oxidation treatment on SiC particles, and generating an oxidation film on the surfaces of the particles; ball-milling and mixing the treated micron and nano SiC particles and micron pure magnesium particles according to a specific proportion, and pressing into a precast block; then preparing an aluminum alloy melt, cooling to a solid-liquid two-phase region, carrying out semi-solid stirring, and adding the preheated precast block; and finally, raising the temperature to be above a liquidus, rewarming, stirring and molding by casting. Through the synergistic effect of ultrasonic physical dispersion, high-temperature oxidation surface modification and magnesium-induced semi-solid stirring, the problems that micro-nano particles are prone to agglomeration, wettability is poor and interface reaction is difficult to control are effectively solved, multi-scale uniform dispersion distribution of a reinforced phase in an aluminum matrix is achieved, and the comprehensive performance of the composite material is remarkably improved.

The invention discloses a graphene-aluminum composite material and a preparation method thereof, and belongs to the technical field of metal-based composite material preparation. The raw materials comprise modified aluminum particles and a graphene dispersing agent; the production process comprises the steps of aluminum particle interface modification treatment, graphene dispersing agent preparation, modified aluminum particle wrapping with graphene, heating pressing and heating extrusion forming. A nanometer interface modification layer is constructed on the surfaces of aluminum particles through a modifier to improve wettability and inhibit generation of Al4C3, a specially-made pressing device improves the compactness of a green body, inert gas protection is matched for extrusion, the performance of the composite material is optimized, and the problems that graphene and an aluminum matrix are poor in interface compatibility, prone to agglomeration, prone to generating brittleness at high temperature and the like are solved; the graphene is uniformly dispersed, and the composite material has excellent mechanical properties and high conductivity and is suitable for industrial mass production.

The invention belongs to the technical field of metal-based composite material additive manufacturing, and particularly relates to ultrasonic-assisted green laser equipment for copper-based diamond cooling fin machining, which comprises a rack, a printing cabin, a green laser machining system, an ultrasonic-assisted system, a powder spreading system, a gas control system, an intelligent control system and an online monitoring system. By integrating a green laser processing system and an ultrasonic auxiliary system, an ultrasonic-green laser-powder multi-energy field coupling processing system is constructed, the wavelength of green laser is 532 nm, the absorption rate of copper is increased, and compared with traditional infrared laser, low-power and high-efficiency melting of copper can be achieved, the diamond graphitization risk is reduced from the angle of a heat source, and the production cost is reduced. Ultrasonic vibration is transmitted to a molten pool through a substrate coupling type structure, by means of the cavitation effect and the acoustic streaming effect, the interface wettability of copper and diamond is effectively improved, the interface bonding force is enhanced, the interface thermal resistance is reduced, meanwhile, grains are refined, pores are eliminated, residual stress is reduced, and the comprehensive performance of the cooling fin is remarkably improved.

The invention discloses a high-strength and high-conductivity nickel-loaded reduced graphene oxide reinforced copper-based composite material and a preparation method thereof, and belongs to the technical field of metal-based composite materials. The method comprises the following steps: firstly, preparing nickel-loaded reduced graphene oxide powder, then atomizing the nickel-loaded reduced graphene oxide powder, adding the atomized nickel-loaded reduced graphene oxide powder into a copper melt, and applying a synergistic effect of an alternating magnetic field and a direct-current electric field to realize enhanced phase directional alignment and interface strengthening; and finally, through homogenizing annealing, circular machining of'multi-pass cold drawing deformation and intermediate annealing ', rotary swaging and low-temperature aging treatment, the composite material which is uniform in structure and tight in interface bonding is obtained. The material has high strength and high conductivity, the tensile strength of the material is not lower than 700 MPa, the conductivity of the material is not lower than 80% IACS, and the material is suitable for high-requirement electrical materials and electronic interconnection and aerospace conductor components.

The invention provides a structured modeling and intelligent sorting decision-making method and device for feeding and discharging visual detection data of a metal-based composite material, and is applied to the technical field of data processing. The full-process technical system of data acquisition, threshold setting, processing modeling, strategy making and transmission execution is constructed according to the feeding and discharging sorting requirements of the metal-based composite material. The method comprises the following steps: firstly, collecting visual detection core data and working condition associated data, and setting a multi-dimensional threshold according to sorting precision, defect detection sensitivity and production efficiency; generating a standardized data set through data noise reduction, calibration, alignment and feature extraction, and sorting the standardized data set; determining a sorting decision strategy in combination with characteristics such as material specifications and computing power resources, and matching a sensor acquisition frequency; and after the data set is divided into control batches for ordered transmission, executing parameters are optimized through a multi-modal feature fusion algorithm, equipment and scenes are dynamically adapted, and finally accurate sorting control signals are generated, so that efficient and accurate sorting is realized.

The invention discloses a three-dimensional graphene copper composite material based on in-situ interface chemical bonding and a preparation method and application of the three-dimensional graphene copper composite material, relates to the technical field of metal-based composite materials, and solves the problems of graphene dispersion and interface bonding. The preparation method of the three-dimensional graphene copper composite material comprises the following steps: dissolving soluble copper salt and an organic ligand in water to form a complex solution, adding copper powder into the complex solution, uniformly mixing, and drying to obtain precursor coated copper powder; and carrying out spark plasma sintering or vacuum hot pressed sintering on the precursor coated copper powder to obtain the copper powder. A three-dimensional interpenetrating continuous network formed by graphene is arranged in the prepared three-dimensional graphene copper composite material, the interface of the graphene and a copper matrix is a chemical bonding interface, the comprehensive performance is excellent, and the composite material has high conductivity (gt; 103% IACS) and a high strength (gt; the comprehensive performance of the composite material is far better than that of a composite material prepared by a traditional method, and the composite material is suitable for high-end electric conduction, heat conduction and structural function integrated components.

The invention discloses equipment and a method for laser auxiliary heating, magnetic control arc combination and static magnetic field coupling, and relates to the technical field of refractory and high-melting-point metal and metal-based composite materials. The problems of difficulty in melting and non-uniform components in the prior art are solved. The equipment comprises a vacuum melting furnace, a split water-cooled crucible, a laser auxiliary heating device, an electric arc generating device, a magnetic control device, a static magnetic field generating device and a central control cabinet. The method comprises the steps of charging and vacuumizing, laser preheating, starting arc and double-magnetic-field coupling smelting, and coordinately regulating and controlling multiple parameters through a control cabinet so as to realize accurate control on flowing and solidification structures of a molten pool. Through multi-energy field time sequence coupling and space cooperation of laser, magnetic control electric arc and static magnetic field, active intervention on the molten pool dynamics and solidification process is achieved, component homogenization is promoted, the solidification structure is refined, and the method is used for preparing high-temperature alloy and refractory and active metal material cast ingots with uniform components and excellent structure performance.

The invention belongs to the field of metal-based composite materials, and provides a copper-containing diamond composite material and a preparation method and application thereof. The design that an in-situ zigzag TiC interface layer and a titanium-copper gradient transition layer are sequentially formed on the surfaces of diamond particles is adopted, the thickness of the TiC interface layer ranges from 85 nm to 120 nm, the thickness of the titanium-copper gradient transition layer ranges from 172 nm to 1600 nm, the titanium-copper gradient transition layer is divided into a titanium-rich area, a gradient area and a copper-rich area, and the volume fraction of diamond ranges from 20% to 50%. The preparation method comprises the steps of hydrogen plasma etching pretreatment, gradient layer preparation through magnetron co-sputtering, staged temperature control sintering and post-treatment. According to the copper-diamond composite material, excellent heat conduction and mechanical properties are achieved, the zigzag interface layer and the gradient transition layer form an interlocking structure, interface bonding is effectively enhanced, the problems that a traditional copper-diamond composite material is weak in interface bonding and insufficient in performance are solved, and the copper-diamond composite material has wide application value.

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 discloses a modeling and analysis method for a metal matrix composite crystal plasticity finite element, and particularly relates to the field of metal matrix composites for spaceflight. Comprising the following steps: acquiring EBSD data of a to-be-detected metal-based composite material; identifying a metal matrix phase and a reinforced fiber phase according to the EBSD data; carrying out texture analysis on the to-be-detected metal matrix composite material, and determining grain orientation data; according to the grain orientation data, establishing a finite element model of the to-be-tested metal matrix composite material, and generating a geometric grid; identifying a metal matrix phase and a reinforced fiber phase in the finite element model, and endowing each phase with parameters; according to the crystal plasticity constitutive model, determining the strain of the to-be-measured metal-based composite material; and original crystal plasticity parameters are corrected according to the actually-measured strain and strain, and the metal-based composite material model is obtained. The metal matrix composite model can obtain the grain plastic strain in the plastic deformation process.

The invention discloses a method for preparing an ultrahigh-conductivity graphene / copper composite material through nitrogen plasma ball milling, and relates to the technical field of metal-based composite material preparation. The preparation method of the composite material comprises the steps that copper powder and graphene are mixed and placed in plasma ball milling equipment, a plasma generator and a high-energy ball milling device are started for mixing treatment in the nitrogen atmosphere, and composite powder is obtained; and the composite powder is densified through a spark plasma sintering technology, and the block composite material is obtained. Through the synergistic effect of plasma stripping, nitrogen doping and mechanical compounding, high-quality stripping, controllable doping and uniform dispersion of graphene are achieved in one step, interface bonding of graphene and copper is remarkably improved, and the interface electron transmission capacity is effectively enhanced. The graphene / copper composite material prepared by the preparation method disclosed by the invention shows extremely high conductivity while keeping high density.

The invention discloses a high-efficiency preparation method of a high-volume-fraction particle reinforced metal matrix composite material, which is a multi-unit hot-pressing sintering molding preparation method, and is characterized by specifically comprising the following steps: (1) uniformly mixing reinforcement particles and metal matrix powder according to a certain volume ratio to form composite powder; (2) loading the composite powder into a mold; (3) hot pressed sintering is conducted, the sintering temperature is 1-50 DEG C below the melting point of the metal matrix, and a multi-unit sample piece of the high-volume-fraction particle reinforced metal matrix composite is obtained; and (4) processing the multi-unit sample piece into a plurality of small-size sample pieces. According to the method, multiple target small-size sample pieces (only one-dimensional size is larger than 10 mm) can be spliced and expanded into multi-unit sample pieces (the two-dimensional size is not smaller than 10 * 10 mm) according to the size and shape characteristics of the target sample pieces, the multi-unit sample pieces are prepared firstly through hot pressing sintering, and then the multiple small-size sample pieces are obtained through cutting. According to the technical scheme, high-efficiency and batch production of high-performance and high-precision hot-pressed sintered small-size samples is achieved, the preparation cost can be effectively controlled, and engineering is achieved.

The invention discloses a gradient strengthening preparation method of a cast high-entropy alloy composite material based on a laser cladding preform, and belongs to the technical field of metal matrix composite material preparation. The method comprises the following steps: firstly, preparing composite powder of a high-entropy alloy and a nano ceramic reinforced phase by combining plasma-assisted ball milling with a pulse electromagnetic field; then constructing a prefabricated body with a gradient pore structure by adopting an intelligent regulation and control laser cladding technology; the prefabricated body and a congruent-component high-entropy alloy cast ingot are innovatively metallurgically bonded through a vacuum gradient infiltration process, and a large-size overall composite material is prepared; and finally, forming a gradient nanostructure on the surface layer of the material through ultrasonic-assisted laser surface reconstruction and small-deformation gradient heat treatment. According to the method, the technical problems that reinforcing phases are uneven in distribution, the interface bonding strength is low, and large-size components are difficult to prepare are successfully solved, the prepared composite material has the excellent gradient performance that the surface hardness is larger than or equal to 12 GPa, and the core hardness is larger than or equal to 8 GPa, ceramic particles are evenly distributed in a three-dimensional network shape, the 800-DEG C high-temperature oxidation resistance is improved by 30% or above compared with a traditional high-entropy alloy, and the composite material is suitable for large-size components. The method is particularly suitable for manufacturing high-performance key components in the fields of aerospace, national defense and military industry and the like.

This invention relates to the field of metal matrix composite material preparation technology, and discloses a method for preparing a bundled vanadium carbide reinforced steel matrix composite material, comprising: immersing vanadium wire in a pretreatment chemical isolation liquid and drying it to form a precursor solid film on the surface; fabricating a preform from the vanadium wire with the solid film on the surface using a three-dimensional orthogonal weaving process; placing the preform in a vacuum sintering furnace and heating it to complete solid-phase pre-alloying; fixing the preform in a mold and preheating it under a protective atmosphere; melting a high-carbon steel matrix material until it is completely liquefied, injecting it into the mold to immerse the preform, and cooling it to obtain a composite preform block; subjecting the composite preform block to in-situ reaction diffusion heat treatment to obtain the composite material. This invention prevents the thermal loss of vanadium wire during liquid casting and, through in-situ diffusion reaction, allows the generated vanadium carbide to inherit the initial weaving morphology, achieving a three-dimensional bundled uniform distribution of the reinforcing phase within the steel matrix.

This invention belongs to the field of laser surface engineering and metal matrix composite technology, and provides a Ti / Nb microalloyed Inconel 625 toughening coating, its composite powder, and preparation method. The composite powder is composed of gas-atomized Inconel 625 alloy powder, titanium powder, and niobium powder, with a Ti to Nb mass ratio of (0.8–1.2):1 and a total addition amount of 0.8–1.5 wt%. A dual-laser cladding process is employed. An initial coating is first formed by laser cladding in an inert atmosphere, followed by in-situ pulsed laser shock blasting when cooled to 900–1000℃. After slow cooling, a toughened coating is obtained. The resulting coating contains 10–20 nm dispersed Ni3(Nb,Ti) composite γ-rays. , The coating contains no Ni2(Nb,Si) Laves phase. It exhibits both high strength and high toughness, along with excellent high-temperature stability.

The application discloses a kind of preparation systems of carbon nanotube reinforced metal matrix composite, it is related to the preparation technical field of carbon nanometer metal material, system includes including carbon nanotube preparation unit, carbon nanotube preparation unit connects mixer, multiple feed pipes are connected on mixer, multiple hole distribution plates are connected in mixer, rotary feeder is connected at the discharge port of mixer bottom, rotary feeder connects venturi tube, venturi tube connects material dispersion unit, material dispersion unit connects material melting unit, material melting unit is connected with for the spray gun that molten mixed material is sprayed to conveying belt, conveying belt connects mechanical tablet press, mechanical tablet press connects heat treatment furnace.The system realizes the accurate control of reinforcing phase morphology and dispersity, solves the technical problems of material interface combination and densification;And through the design of heat pressing setting unit, the comprehensive performance and production efficiency of material are significantly improved.

This invention relates to a method for preparing a high-wear-resistant metal-based composite material. This method significantly improves the wear resistance of the material by combining nano-reinforcing particles, surface modification technology, and self-healing capabilities. Aluminum alloy or titanium alloy is selected as the matrix, and nano-sized silicon carbide or alumina particles are used as reinforcing materials. The reinforcing materials are uniformly dispersed using processes such as stir casting, forging, diffusion bonding, infiltration, or powder metallurgy. The composite material structure is then precisely formed using 3D printing technology. The surface of the composite material is treated with a nano-coating or plasma treatment to enhance its wear resistance and corrosion resistance. Furthermore, by embedding microcapsules containing a repair agent into the material, automatic repair of worn areas is achieved, improving the material's reliability and service life. This composite material is particularly suitable for mechanical engineering and automotive manufacturing, especially in the manufacture of automotive brakes under high-wear environments, demonstrating excellent performance and broad application prospects.

The invention discloses a stable encoder connecting piece and a processing method thereof, and belongs to the technical field of encoders. The device comprises a mounting plate, a first spring plate, a second spring plate and a third spring plate, the first spring plate is connected with the mounting plate through a first door-shaped punched hole, the second spring plate is located between a second n-shaped punched hole and an inverted n-shaped punched hole, and the third spring plate is arranged in the inverted n-shaped punched hole and provided with a large through hole and multiple sets of encoder fixing holes. According to the invention, the technical problem that the encoder is easy to damage due to radial alternating stress caused by installation concentricity deviation of the encoder is solved. Stress from different directions is buffered through elastic deformation of the multiple stages of spring plates, and in combination with gradient fiber design of the fiber reinforced metal matrix composite material, stable transition from rigid installation to flexible buffering is achieved, stress distribution is optimized, stress concentration is avoided, and therefore the encoder is effectively protected, and the service life of the encoder is prolonged.

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 present invention relates to a technique of dramatically improving a method for causing a molten metal of an Al alloy or the like to infiltrate without pressurization into a preform obtained by molding and hardening a ceramic powder, and obtaining “a metal matrix composite formed from a ceramic powder and an Al alloy or the like” in a uniform state as a whole more simply and stably, and the present invention provides “a production method for producing a metal matrix composite containing aluminum and ceramic, the method including: obtaining a mixed body by performing molding using a mixture containing a magnesium-containing powder, a ceramic powder, and an inorganic or organic / inorganic binder that is hardened when heated to 500° C. or lower; preparing a preform by calcining the mixed body at a temperature of 500° C. or lower; and causing an Al alloy or the like to infiltrate without pressurization into the obtained preform to produce the metal matrix composite containing aluminum and ceramic, and a method for preparing the preform.”

The present application relates to the field of metal matrix composites, and discloses a gradient porous copper-aluminum composite material, a preparation method and application thereof.The gradient porous copper-aluminum composite material comprises an aluminum substrate and a gradient porous copper arranged on one surface of the aluminum substrate; the gradient porous copper is divided into a small-pore copper layer and a large-pore copper layer which are in contact with the aluminum substrate; the transition part of the small-pore copper layer close to the aluminum substrate has a graphene layer deposited on the surface combined with the aluminum substrate and the internal pore surface, and the pores are filled with silver.The present application has the advantages of high thermal conductivity, low interfacial thermal resistance, high strength, lightweight and low cost by designing the gradient pore structure of the porous copper, strengthening the interface with graphene and filling silver glue, and the obtained composite heat dissipation plate material after being combined with the aluminum substrate.

Metal matrix composite end cap 136 for forming cartridge case, comprising admixture of metal powder and binder matrix material, the admixture being caused to solidify in the shape of said end cap 136.

Aspects of the subject technology relate to tools, system and methods related to a drilling tool that is fabricated using a bimetallic member that is subjected to an infiltration process. The method can include having an amount of precipitation hardenable steel and an amount of another type of steel. The precipitation hardenable steel and the other type of steel are metallurgically bonded to form a bimetallic member including a casting mandrel portion and a drill string connection portion. A reinforcing powder is infiltrated with a binder while in contact with the casting mandrel portion to form a metal matrix composite about the casting mandrel portion. A cutting structure is fabricated into the metal matrix composite of the drilling tool.

The invention discloses a simulation optimization method for preparation parameters of a silicon carbide particle reinforced metal matrix composite, which comprises the following steps: S1, setting the temperatures of a preform and a sand box to be room temperature, and selecting circular ceramic particles for pouring to obtain a casting; s2, after three-dimensional graph drawing is carried out on a casting in Creo, a model is converted into an igs format and then imported into Procast, and then grid division is carried out in the Procast; s3, other variable parameters are kept constant, only the pore size of the ceramic particles is changed, and the optimal pore size is determined through simulation analysis. Accurate guidance is provided for performance improvement and practical application of the ceramic particle reinforced metal matrix composite, scientificity and preciseness of simulation research are ensured, and follow-up experimental verification and practical production and application of the material are powerfully supported.

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 proposes a metal matrix composite material processing apparatus and method based on plasma etching, belonging to the field of composite material processing. It determines the material properties, target processing method, and final service performance requirements of the metal matrix composite workpiece. The workpiece consists of a metal matrix and reinforcing particles dispersed within the metal matrix. The area to be processed on the workpiece is exposed to a plasma jet, and plasma etching is used. The reinforcing particles react and transform into volatile gases, which are then removed from the metal matrix, forming a softening pretreatment layer on the workpiece surface. Ultrasonic vibration cutting is then used to remove the softening pretreatment layer. This invention removes the reinforcing particles from the metal matrix through plasma etching, locally transforming the originally heterogeneous and difficult-to-process composite material into a relatively homogeneous metal layer for cutting. This achieves homogeneous transformation of the processed object, eliminating the core mechanisms of particle pull-out, breakage, and interface cracking in traditional processing.