250 results about "Powder metallurgy" patented technology

The utility model relates to powder metallurgy technical field, and disclose a kind of anti-clogging feeder for powder metallurgy, including movable frame, the top of movable frame is fixedly installed with mounting bracket, the inboard of mounting bracket is fixedly installed with fixed barrel, the inside of fixed barrel is provided with stirring anti-blocking mechanism, the bottom of fixed barrel is provided with conveying and discharging mechanism, in the utility model: through stirring anti-blocking mechanism, effectively avoid the accumulation jamming caused by not in place, let powder keep good flow state, ensure that the discharging process is smooth, through conveying and discharging mechanism, utilize helical blade stem rotation, powder is conveyed to the vicinity of discharging pipe, drive rubber piston to push powder, not only increase the power of powder conveying, also can effectively prevent powder from being jammed at the connecting place of conveying pipe and discharging pipe, by pulling limit plug rod, change its limit degree to powder conveying, can accurately control the time length of powder from discharging port, thereby realize ration discharging, improve the utilization of powder.

The application provides a low-oxygen PMZ4020Nb ferritic stainless steel water atomization powder and a preparation method thereof, and belongs to the technical field of powder metallurgy. According to the weight percentage, the chemical components of the powder include C≤0.02%, Cr 16.5-17.5%, Mo 0.9-1.1%, Nb 0.4-0.6%, Si 0.7-2.2%, Mn≤0.3%, P≤0.03%, S≤0.02%, and the balance of Fe and inevitable impurities. The oxygen content of the powder is ≤1200ppm, wherein the free oxygen content is ≤300ppm, and the combined oxygen content is ≤900ppm. The particle size distribution of the powder is that the proportion of particles with a size of-200 mesh is ≥90%, and the proportion of particles with a size of-300 mesh is ≥65%. The loose bulk density of the powder is 2.9-3.1g / cm3, and the flowability is ≥25s / 50g. The micro-morphology of the powder is spherical, and the sphericity is ≥0.85. The low-oxygen PMZ4020Nb ferritic stainless steel water atomization powder and the preparation method thereof have excellent corrosion resistance, low oxygen content, excellent comprehensive powder performance, process stability and scalability.

The application discloses a method for preparing high-purity superfine tungsten powder by series impurity removal and microwave calcination, and relates to the technical field of refractory metal powder metallurgy. The method uses 99% and below industrial-grade ammonium paratungstate as raw material, and sequentially performs pyrolysis, two-stage physical purification, ultrasonic synergic acidolysis deep purification, microwave uniform calcination and sectional reduction. Firstly, the ammonia solution-evaporation crystallization method and the chemical precipitation method are connected in series to realize deep impurity removal, and the chemical precipitation method is used to directly obtain a nano tungsten oxide precursor, so that the morphology of the tungsten powder is guaranteed for subsequent reduction; secondly, the microwave calcination process is introduced to realize fast and green and environment-friendly uniform heating, and the hard agglomeration of the precursor is significantly reduced; finally, the sectional reduction method is adopted to effectively block the CVT effect in the reduction process, and abnormal grain growth is avoided. The method solves the problems of incomplete purification, sintering agglomeration of the precursor during reduction and out-of-control reduction particle size in the prior art, and the prepared tungsten powder has high purity and small average particle size.

This application belongs to the field of powder metallurgy technology, specifically a bicrystalline cemented carbide and its preparation method. The preparation method includes the following steps: mixing fine WC powder (2~4μm), Co powder, VC, and Cr3C2, followed by ball milling and spray granulation to obtain fine WC-Co composite powder; mixing coarse WC powder (8~12μm), Co powder, and ultrafine WC powder (0.15~0.25μm), followed by ball milling and spray granulation to obtain coarse WC-Co composite powder; and dry mixing, pressing, and sintering the fine WC-Co composite powder and the coarse WC-Co composite powder to obtain a bicrystalline cemented carbide with a Rockwell hardness of 87~90 HRA and a fracture toughness of 14~17 MPa·m. 1 / 2 The bending strength is 2500~3000MPa. This application prepares coarse and fine WC-Co composite powders separately, so that the inhibitor can effectively suppress the growth of fine WC grains during the sintering stage, while the ultrafine WC can promote the growth of coarse WC grains. This results in the prepared cemented carbide exhibiting a clear dual-scale WC grain distribution, while possessing both high hardness and high toughness. After dry mixing and pressing sintering, the prepared bicrystalline cemented carbide has high density.

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 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 method for obtaining amorphous iron in the form of volumetric samples of varying porosity by sintering compacted mixtures of Fe₂O₃ and RLA in airtight steel capsules placed in a furnace at a pressure of 10⁻¹ × 10⁻² mm Hg. The sintering process and subsequent slow cooling of the samples were carried out according to standard powder sintering techniques used in powder metallurgy. The reduction of Fe₂O₃ to Fe is achieved by the decomposition products of the RLA biocomponent to C and CO. The stabilization of the amorphous state of the iron is achieved through the presence of impurities in the form of clay and sand (approximately 10⁻²⁰ wt%) in the RLA. The products of the complete reduction of the clay and sand lead to the formation of Si-Al-C coatings on the surface of the resulting Fe particles.Residual accumulations of SiO2, Al2O3, and C between the iron particles also prevent complete melting / expansion of the iron particles and their transition to the crystalline state. Optimal conditions for amorphous iron formation were found to occur at a mixing ratio of (40-60) wt% Fe2O3 to (60-40) wt% RLA, a processing temperature of 1000 °C, and a processing time of 1-5 hours.

The application relates to a preparation process of a high-density powder metallurgy iron-based alloy, and relates to the technical field of metallurgical materials, in particular to a high-density powder metallurgy iron-based alloy preparation process. The preparation process comprises the following steps: taking copper (2%), nickel (2%), molybdenum (1%), graphite (0.3%) and the rest of iron according to the mass percentage, and making the above raw materials into 800-mesh powders; uniformly mixing the powders; pressing the mixed powders into blanks; sintering the blanks at 1100-1250 DEG C under a protective atmosphere or vacuum condition for 30-120 minutes; and obtaining the iron-based alloy product through shaping. The iron-based alloy material prepared by optimizing the powder granularity (800-1000 mesh), the pressing mode and the sintering is obviously superior to traditional powder metallurgy iron-based materials. The iron-based alloy product has the comprehensive advantages of high density, high strength, good size precision and stable performance, and has a wide industrial application prospect.

This utility model relates to a cleaning device for powder metallurgy sprockets before inspection, including a cleaning channel, a roller conveying mechanism installed in the cleaning channel to transport the sprocket forward, a blowing mechanism for blowing air, and a dust suction mechanism for vacuuming. The roller conveying mechanism includes a roller group composed of several parallel rollers and a driving component for driving the rollers to rotate. The roller group includes a front roller group and a rear roller group arranged front to back, and a flipping mechanism for picking up and flipping the sprocket is installed between the front roller group and the rear roller group. This utility model, through the combination of the blowing mechanism, the dust suction mechanism, and the flipping mechanism, thoroughly removes impurities from all surfaces of the sprocket, improving the accuracy of subsequent inspections.

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.

This application relates to the technical field of powder metallurgy, specifically to a high-chromium-content chromium-aluminum target and its preparation method. The atomic percentage content of each element is: Cr 60-80 at%, with Al as the balance. The preparation method includes: uniformly mixing chromium powder and aluminum powder using zirconia balls to obtain a chromium-aluminum mixed powder; loading the obtained chromium-aluminum mixed powder into a rubber sleeve, sealing it after vacuuming, and performing cold isostatic pressing to obtain a chromium-aluminum billet; loading the obtained chromium-aluminum billet into a graphite mold, vacuuming, and heating for pre-sintering; continuing to heat while applying axial pressure for spark plasma sintering; cooling the sintered billet to room temperature in the furnace, demolding, and machining to obtain the high-chromium-content chromium-aluminum target. The preparation method provided by this application can effectively suppress component segregation, significantly improve the density and compositional uniformity of the target material, and has a short production cycle and low cost, making it suitable for the large-scale production of high-chromium-content chromium-aluminum targets.

The application discloses a new energy automobile powder metallurgy transmission shaft torsion impact test bench, which comprises a bottom plate, a rack, a traction mechanism, an impact hammer and a torque testing device, the traction mechanism is fixedly installed on the bottom plate and the rack, the impact hammer is slidably arranged in the interior of the rack, and the torque testing device is fixedly connected to the right side of the top of the bottom plate, and the application relates to the technical field of mechanical property testing. The new energy automobile powder metallurgy transmission shaft torsion impact test bench connects the pull rope and the impact hammer by the mode that the clamping block clamps the hook block, so that the pull rope and the impact hammer can be quickly separated, and then the impact hammer is not affected by the resistance of the motor output shaft rotation when falling, the impact force of the impact hammer is easier to measure, errors are not prone to occur, and the clamping block is matched with the triangular block, the pull rope pulls the impact hammer to the top, the triangular block pushes the clamping block to the two sides after pushing away the clamping block, and the release of the impact hammer can be automatically realized, and an electric grabbing release structure is not needed, so that the cost is low.

The application relates to a powder metallurgy product finishing machine material returning top rod connecting device, which relates to metal powder forming equipment. The device comprises a first swing rod hinged below a top rod support through a support, a second swing rod hinged with the first swing rod, a lower connecting rod moving up and down through a power mechanism, the lower connecting rod driving the first swing rod to rotate around a first pin shaft; the support is fixed on the top rod support, the second swing rod drives the support seat to move up and down, and the direction is opposite to that of the lower connecting rod; the material returning top rod drives the core rod fixedly connected to the top part of the material returning top rod to move up and down; when the support seat moves up and down, the material returning top rod is limited by a linear bearing in the top rod support, can only move up and down, the first swing rod and / or the second swing rod are forced to rotate around the rotating shaft, and the support seat moves horizontally; thus, the abrasion of the material returning top rod is reduced, and the service life of the material returning top rod is prolonged.

The invention discloses a surface nano oxide dispersion strengthening method for high-strength and high-toughness aluminum alloy powder and a powder material thereof, and relates to the technical field of powder metallurgy materials. Aluminum-zinc-magnesium-copper-zirconium pre-alloyed atomized powder is used as a matrix, and is dispersed by virtue of polyvinylpyrrolidone and anhydrous alcohol; the preparation method comprises the following steps: sequentially introducing magnesium aluminate spinel nanoparticles, optional magnesium oxide nanoparticles and passivated magnesium nanoparticles for dry coating, embedding a nano dot matrix into a surface layer through ceramic ball micro shot blasting, removing organic matters in a vacuum subsection manner, thermally activating at 405-435 DEG C, cooling, and adding zinc micro powder for low-energy coating. The method is suitable for canning degassing, hot isostatic pressing and hot extrusion workpieces. And large-scale production can be realized. The oxide in the obtained powder is converted into intragranular non-communicated dispersion particles from a prior powder boundary communicated interlayer, the boundary connectivity is reduced, the densification combination is improved, the fracture toughness, impact and high-cycle fatigue are remarkably improved, meanwhile, the powder fluidity is kept, and the consistency is improved.

The invention is directed to a method for improving the wear resistance of a vanadium alloyed powder metallurgy produced cold work tool steel comprising 1-20 %V, 1 – 5 %Mo and ≤ 1 %W by HIPing the steel and subjecting the HIPed steel to a heat treatment at a temperature of at least 5 °C higher than the solidus temperature of the tool steel for a time of at least 30 minutes in order to increase the size of the VC-particles, wherein the cold work tool steel after hardening and tempering does not contain noticeable amounts of other carbides than VC.

This invention discloses a high-strength and tough composite material for powder metallurgy and its preparation method, belonging to the field of metal composite material technology. It addresses the technical problem that the toughness, strength, and wear resistance of existing high-strength and tough composite materials for powder metallurgy need further improvement. Specifically, it comprises the following components by weight: 86-90 parts copper powder, 2-4 parts nickel powder, 1.5-3 parts copper-tin composite, 1.5-3 parts tungsten-titanium composite, 1.5-3 parts reinforcing powder, 150-200 parts anhydrous ethanol, and 0.5-1 parts auxiliary additives. This invention further improves the toughness, strength, and wear resistance of the high-strength and tough composite material for powder metallurgy through the synergistic effect of the prepared copper-tin composite, tungsten-titanium composite, and reinforcing powder.

The application belongs to the technical field of powder metallurgy, and particularly discloses a nanoscale oxide particle dispersed aluminum-titanium target material and a preparation method and application thereof. x The nanoscale oxide particle dispersed aluminum-titanium target material has a double-layer structure, including a plated raw material layer and a base layer. x The plated raw material layer is composed of Al, Ti and MeO, wherein the mass percentage of Al and Ti accounts for 80-95%, and the mass percentage of MeO accounts for 5-20%; and the base layer is composed of Al and Ti or pure Al. The nanoscale oxide particle dispersed aluminum-titanium target material and the preparation method and application thereof have the advantages that the aluminum-titanium target material preparation process flow is simple, the production efficiency is high, the method is economic and environmentally friendly, and the method is suitable for batch production; the aluminum-titanium target material prepared by the method solves the binding problem of brittle target material, the target material has high density, meets the demand of hard alloy coating film plating, has no cracking problem in the plating process, and has high coating hardness and good wear resistance.

This invention provides a composite metal powder, its preparation method, and its applications. The composite metal powder comprises metal particles and one or more metal wires bonded to the metal particles. The diameter of the metal particles is smaller than the length of the metal wires but larger than the diameter of the metal wires. The composite metal powder of this invention has a spiky, spherical structure with low loose and tap density. When made into powder metallurgy products, it can significantly improve porosity and reduce shrinkage while effectively ensuring the thermal conductivity and mechanical properties of the powder metallurgy products. It also makes the pore size distribution in the powder metallurgy products more uniform and controllable. It is particularly suitable for preparing capillary structures with high reliability, high permeability, and large capillary pull, and has broad application prospects in fields such as heat dissipation devices.

This invention provides a molybdenum alloy and its preparation method, relating to the field of powder metallurgy materials technology. The molybdenum alloy, by mass percentage, comprises the following components: rare earth element (RE): 0.045wt%-0.1wt%, zirconium salt: 0.15wt%-0.20wt%, with the balance being Mo. The preparation method of the molybdenum alloy includes: heating and stirring rare earth salts, zirconium salts, and water to obtain a mixed solution; continuously spraying the mixed solution onto the surface of stirred molybdenum oxide powder using a high-pressure spraying device to obtain a spray-coated mixed powder; drying and calcining the spray-coated mixed powder to obtain rare earth-doped molybdenum oxide powder; and reducing and sintering the rare earth-doped molybdenum oxide powder to obtain the molybdenum alloy. This invention improves the strength and plasticity of sintered molybdenum alloys, eliminating the need for subsequent plastic processing steps.

A powder metallurgy transmission plate material for a clutch, comprising in percentage by mass: 55%-65% of high-purity atomized iron powder, 8%-12% of electrolytic copper powder, 4%-8% of nickel hydroxide powder, 1.5%-4% of ferromolybdenum powder, 1%-3% of chromium powder, 0.3%-1.5% of lanthanum powder, 1.5%-3.5% of nano silicon carbide particles, 0.8%-2% of carbon fiber, 0.5%-1.5% of whisker-like alumina, 0.3%-1% of cellulose nanocrystals, 0.5%-2% of rare earth oxides, 2.3%-6% of a lubricating agent and 0.5%-1.8% of a binder. A transmission plate prepared by using the material component ensures the reliability and durability of the transmission plate in a complex mechanical environment, prolongs the service life of the transmission plate, and reduces safety risks. Also comprised is a preparation method for a powder metallurgy transmission plate material for a clutch.

The utility model relates to collecting device technical field, and its in order to solve the lack of buffer structure of current material collecting device, cannot be applicable to the collection of high -speed and miniature material, can easily cause product collision damage even spillage problem, the utility model provides a kind of material receiving device, including material collecting box and buffer assembly;The buffer assembly includes buffer pad, barrier net and buffer frame;The buffer pad is inclinedly equipped in the inner side wall of the buffer frame;The barrier net is equipped in the top of the buffer pad;The barrier net and the top of the buffer pad are left with material passage;The material collecting box is communicated at the bottom of the buffer frame;The material receiving device provided by the utility model, powder metallurgy product is collected after buffering, avoids the damage caused by mutual collision of miniature powder metallurgy product in the process of collection, and the situation of spilling.

This application relates to the field of powder metallurgy technology, and particularly to a modified flake zinc powder, a modification method, an anti-corrosion coating, and a preparation method thereof. The modification method involves stirring flake zinc powder at a speed of 10-40 r / min, spraying an atomized modified dispersion onto the powder during stirring, transferring the flake zinc powder to a horizontal ball mill after atomization, using glass beads as a grinding aid, and dispersing it at a speed of 40-120 r / min for 1-3 hours. The resulting modified flake zinc powder is obtained after sieving. The modified dispersion includes a dispersant and a modifier, wherein the modifier is selected from at least one of silane coupling agents, titanate coupling agents, and fluorocarbon surfactants. The solution provided in this application, through a composite process of atomized coating and dry dispersion, achieves uniform and controllable adsorption of the modifier on the surface of the flake zinc powder, significantly improving the effective utilization rate of the modifier, reducing the amount of modifier and diluent consumed from the source, and producing a modified flake zinc powder with both low oil absorption value and high dispersibility.

This invention discloses a preparation process for high-carbon ferrochrome based on plasma spheroidization technology, belonging to the field of powder metallurgy. The process involves crushing and ball milling high-carbon ferrochrome blocks to obtain pre-formed powder, adding tannic acid, urea, nickel acetate tetrahydrate, and citric acid for coating, followed by spray drying. After pre-reduction carbonization in an argon-hydrogen atmosphere, the powder is then spheroidized using a radio frequency inductively coupled plasma torch. In-situ nanostructure growth is achieved in a mixed atmosphere of argon, hydrogen, and acetylene. Nickel acetate is reduced to catalytically active elemental nickel nanoparticles under the action of hydrogen and carbon monoxide. The powder is then cooled, graded, and inertly encapsulated to obtain a high-sphericity, low-oxygen-content, high-carbon ferrochrome-based core-shell structured spherical powder. The process flow of this invention is continuous and controllable, effectively improving powder flowability, bulk density, hardness, and corrosion resistance, and is applicable to additive manufacturing, thermal spraying, and powder metallurgy forming.

The application discloses a metal powder metallurgy forming processing device and a processing technology thereof, and relates to the technical field of metal powder metallurgy forming processing. The device comprises a mounting base, and a mounting mechanism for metal powder metallurgy forming processing is arranged on the mounting base. The mounting mechanism comprises a feeding assembly, a supporting slide rail fixed on the upper end of the mounting base, an installation plate connected with a pushing assembly in the supporting slide rail, a pair of hot forming cavities arranged on the upper end of the installation plate, and a supporting frame arranged on the upper end of the mounting base. In the application, a first electric push rod is used to push the installation plate to slide on the supporting slide rail, so that the two groups of hot forming cavities work alternately. When one hot forming cavity is located below a pressing block to be pressed, the other hot forming cavity is just located below a feeding shell to be fed. The pushing assembly is used to realize the alternate working of the two groups of hot forming cavities, one group is used for pressing forming, and the other group is used for feeding, so that the production efficiency is improved.

The application relates to the application field of metal powder metallurgy technology and discloses a copper-based composite material metal block capable of resisting impact energy and a preparation process and application thereof. The copper-based composite material metal block is used in impact and collision process tests, and impact energy absorption, reduction or elimination is realized by self-pulverization and disintegration. Raw materials of the copper-based composite material capable of resisting impact energy include, in percentage by mass, 1-95% of atomized copper powder, 0-95% of electrolytic copper powder, 1-15% of tin powder, 1-2% of molybdenum disulfide, 0-3% of graphite, 0-7% of phenolic resin, 0-1% of lithium stearate and 0-1% of magnesium stearate. The above raw materials are mixed, secondarily pressed, sintered and electroplated to form the copper-based composite material. When encountering an impacted metal barrier section, the metal block can absorb the counter-impact energy and disintegrate by itself, so that the running speed instantaneously drops to zero, the metal fragment splashing phenomenon does not occur, and the copper-based composite material does not contain lead metal, so that the whole impact and collision process is harmless to the surrounding environment.

This invention belongs to the field of powder metallurgy technology, specifically relating to a high-hardness, low-expansion, and low-oxidation cemented carbide and its preparation method. Doping is achieved through liquid mixing-evaporation crystallization, with precise control of the dopant element content achieved by coordinating temperature and pH control of the crystallization mother liquor. Furthermore, ball milling is eliminated, allowing the incorporated cobalt and chromium to undergo intermolecular mixing, which not only improves doping efficiency but also reduces impurities introduced by ball milling, ensuring the cemented carbide's low expansion coefficient and low oxidation increment. The powder is stored and mixed in a nitrogen atmosphere and at low temperature, reducing the probability of spontaneous combustion and ensuring production safety. Reduction carbonization using a nitrogen and hydrogen mixture not only promotes rapid one-step carbonization but also, by increasing the nitrogen flow rate, promptly removes the water vapor generated during reduction, reducing the risk of powder growth and ensuring the hardness of the cemented carbide.

This invention discloses a liquid-cooled microchannel powder metallurgy fabrication method, belonging to the field of radiator manufacturing technology. The invention employs a pre-stamping process to prepare copper heat dissipation fins, combined with customized spherical high-purity copper powder and composite polymer bonding particles. A uniform mixture is prepared through segmented high and low temperature and high and low speed stirring. This is then combined with metal powder injection molding, oxalic acid degreasing, nitrogen atmosphere constant temperature anti-oxidation pretreatment, and high-vacuum sintering processes, along with controllable molding and sintering parameters, to fabricate a copper liquid-cooled microchannel radiator. This invention effectively solves the problems of difficult molding of thin-walled pure copper microchannel structures, poor dimensional consistency, and susceptibility to defects and springback. It significantly improves the extrusion of copper materials in microchannel structures, the smoothness of the inner wall, and the overall density, strengthens the bond strength between the fins and the substrate, and eliminates leakage, corrosion, and heat dissipation attenuation under long-term liquid cooling cycles. The product yield is high, and the stability is excellent.

The application relates to a multi-component refractory metal carbide-Co composite powder and a preparation method of high-entropy ceramic composite material thereof, and belongs to the field of powder metallurgy. In the application, multi-component refractory metal oxides, cobalt oxides and carbon sources are mixed, vacuum carbothermal reduction is carried out at 1000-1300 DEG C, and a composite powder of uniformly dispersed refractory metal carbide and metal cobalt is generated in situ in one step. The reduction temperature is 200-500 DEG C lower than that of the same system without cobalt. The composite powder is formed, sintered in an Ar atmosphere at 1350-1500 DEG C and 2-10 MPa of air pressure, and a dense refractory metal carbide high-entropy ceramic-Co composite material is prepared. The sintering temperature is more than 400 DEG C lower than that required for sintering the corresponding carbide powder without cobalt. Through the introduction of cobalt, the preparation temperature is greatly reduced, the average grain size of the obtained composite material is less than 3 mu m, and the fracture toughness is more than one time higher than that of the same high-entropy ceramic material without Co. The application is suitable for high-performance cutting tools and wear-resistant parts, and has the advantages of energy saving and consumption reduction and high toughness.

The application discloses a preparation method of superfine-grain high-temperature-resistant induced superlattice phase transition powder high-speed steel, and belongs to the technical field of powder metallurgy, and the method comprises the following steps: 1, raw material selection; 2, after Cr2C powder, Ti x Mo 1‑x C powder and C4H 13 NO powder are mixed, spray drying granulation is carried out; 3, the granulated powder is mixed with high-speed steel powder; 4, multi-stage temperature rising and heat preservation are carried out, and finally, the target powder high-speed steel is obtained. x Mo 1‑x The Cr2C powder and Ti C powder realize multiple strengthening mechanisms, and in combination with the simple process of powder vacuum sintering, the high-temperature performance of the powder high-speed steel is obviously improved, and large-scale industrialized assembly line production with low cost is realized.