2752 results about "Titanium powder" patented technology

The invention provides water-borne acrylic water-proof heat insulating paint, which belongs to the field of building materials and can be applied to surfaces of building roofs, metal sheets, ceramic tiles, glazed bricks, decorative tiles and other materials. The invention provides the water-borne acrylic type water-proof heat-insulating paint by using copolymer latex which is cool mixed by elastic acrylic copolymer emulsion, VAE emulsion and an organic silicon water-proof material as a base material, and hollow glass beads in low heat conductivity, hollow ceramic beads and other heat insulating materials, titanium powder, zinc oxide, ultrafine mica and other reflecting materials, and corrosion-resistance blanc fixe, wollastonite and the like as pigments. In the paint, the solar reflectivity is more than or equal to 0.83, the semi-sphere reflectivity is more than or equal to 0.85, weather resistance aging time is 100 hours without fading or pulverizing, and water-proof performance, such as water tightness, low temperature flexibility, tensile strength and the like, can achieve II type product index requirement of JC/T864-2008. Besides the function of decorating materials, the paint has the functions of water proofing and heat insulation.

The invention relates to a device and method for preparing spherical titanium powder and titanium alloy powder through gas atomization, which belongs to the field of powder metallurgy industry. The device comprises a vacuum chamber, a continuous feeder for titanium or titanium alloy wires/rods is arranged outside the vacuum chamber, a dynamic sealing device is arranged at the top of the vacuum chamber, a metal straightening device is arranged inside the vacuum chamber, an atomizing chamber is arranged below the vacuum chamber, a gas atomization nozzle is installed between the atomizing chamber and the vacuum chamber, the center hole of the nozzle is internally provided with a wire/rod guiding device, a high-frequency smelting coil is installed below the nozzle, wherein the dynamic sealing device, the straightening device, the guiding device and the high-frequency smelting coil are installed on the same axis; a heat dissipation cover is installed inside the atomizing chamber, a protective cover is arranged at the top of the heat dissipation cover, and the centers of the heat dissipation cover and protective cover and the center of the high-frequency smelting coil are on the same axis; a powder collecting pot is arranged below the atomizing chamber. By means of controlling the diameters of the wires, the atomizing gas pressure and the power of a high-frequency power supply, titanium and titanium alloy powder with different particle sizes and particle size distributions can be obtained.

The invention discloses a refractory high-entropy alloy/titanium carbide composite. A refractory high-entropy alloy serves as a matrix phase, and titanium carbide serves as a wild phase; and elements in the refractory high-entropy alloy are selected from at least four kinds of elements of W, Mo, Ta, Nb, V, Ti, Zr, Hf and Cr. A preparation method of the refractory high-entropy alloy/titanium carbide composite comprises the steps that at least four kinds of carbonization metal powder in tungsten carbide, molybdenum carbide, tantalum carbide, niobium carbide, vanadium carbide, the titanium carbide, hafnium carbide, zirconium carbide and chromium carbide are selected and mixed according to the equal molar ratio or the ratio close to the equal molar ratio to form high-entropy matrix powder; and after the high-entropy matrix powder and titanium powder are mixed, alloy mechanization is carried out, then spark plasma sintering or hot-press sintering is carried out, and the refractory high-entropy alloy/titanium carbide composite is obtained. The density and cost of the composite are reduced while the hardness of the composite is improved, excellent high-temperature performance is achieved, and the requirement for manufacturing a high-temperature structural component is met.

A method comprising the steps of: distributing a titanium alloy or pure titanium powder layer on a work table inside a vacuum chamber, directing at least one electron beam from at least one electron beam source over the work table causing the powder layer to fuse in selected locations, distributing a second powder layer on the work table of a titanium alloy or pure titanium inside the build chamber, directing the at least one electron beam over the work table causing the second powder layer to fuse in selected locations, and releasing a predefined concentration of the gas from the metal powder into the vacuum chamber when at least one of heating or fusing the metal powder layer, wherein at least one gas comprising hydrogen is absorbed into or chemically bonded to the titanium or titanium alloy powder to a concentration of 0.01-0.5% by weight of the hydrogen.

The invention provides a short-flow preparation method of micro-sized spherical titanium powder, which belongs to the technical field of powder preparation. The hydrogenation-dehydrogenation technique and the radio frequency plasma body fusion spheroidization technique are integrated, and the titanium hydride powder is selected as raw material; the titanium hydride powder absorbs heat in the high-temperature plasma and quickly decomposes and dehydrogenates, and the titanium hydride power is cracked and crushed in the process of dehydrogenation to produce the micro-sized titanium powder. By using the method, the processes of the dehydrogenation and the spheroidization of the generated titanium powder are finished in one step directly through the plasma processing, and the short-flow preparation of the micro-sized spherical titanium powder is realized. The invention has the advantages that the hydrogenation-dehydrogenation technique and the radio frequency plasma fusion spheroidization technique are combined, so as to shorten the production flow, enhance the production efficiency and reduce the production cost. Simultaneously, the prepared spherical titanium power has fine and even particles, good liquidity, high sphericity and low oxygen content, thereby the requirements of technical industrial production such as the injection figuration, the gel die casting figuration, and the like are satisfied.

The invention discloses a method for manufacturing micro-fine spherical titanium powder, which includes the steps: using sponge titanium as raw materials, mixing the sponge titanium with hydrogen, holding the positive pressure of the hydrogen at 0.05-0.1MPa, preserving heat at the temperature of 650-730 DEG C, and cooling after ensuring the sponge titanium and the hydrogen to sufficiently react; crushing the hydrogenated sponge titanium with an air-stream mill, controlling the revolving speed of the air-stream mill within 1000r/min-1300r/min, and obtaining titanium hydride powder with a grain size smaller than 45 micrometers by means of crushing; and dehydrogenizing and balling the titanium hydride powder by using radio frequency plasma. The method for manufacturing the micro-fine spherical titanium powder has the advantages that the grain size of the powder and grain size distribution can be effectively controlled, and the powder is low in oxygen content, few in production procedure, low in cost, high in balling rate, fine in sphericility and suitable for industrialized popularization.

The invention belongs to a process for preparing and processing powder material by taking plasma as a heat source, in particular to a process and an apparatus of metal titanium powder material for powder metallurgy, plasma spray, injection forming, gel injection molding and the like. The invention has the advantages that: the adoption of the high temperature spheroidization and rapid condensation special spheroidization technique can improve the sphericity and purity of titanium powder, and both a reactor and the titanium powder spheroidization process are cooled with circulating water, thereby ensuring the sealing performance of equipment, also reducing the use of inert gases, effectively reducing costs, improving the production efficiency and guaranteeing the purity of spherical titanium powder.

The invention belongs to the chemical material field, in particular to a denitration catalyst which uses TiO2 as raw material and a preparation method thereof. The catalyst comprises TiO2, V2O, WO3 and addition agent, wherein, TiO2 which is 70-90 percent of the catalyst in weight is used as carrier, V2O5 which is 0.6-2 percent of the catalyst in weight is used as an active component, WO3 which is 5-10 percent of the catalyst in weight is used as cocatalyst, and the rest is the addition agent. The preparation process of the catalyst comprises: titanium powder doped with tungsten is prepared and is added with the active component and the other addition agents to be dried and calcinated to obtain the denitration catalyst. The raw material source is convenient and the price is low. No pretreatment is required. The preparation process is simple. Through the denitration test under fixed bed simulation flue gas condition, the catalyst is proved to be provided with high denitration activity and low SO2 conversion rate and ammonia escaping rate.

The invention provides powder metallurgy titanium alloy and a preparation method thereof. The powder metallurgy titanium alloy comprises the following components in percentage by mass: 2 to 7 percent of Al, 2 to 8 percent of Mo, 2 to 6 percent of V, 2 to 10 percent of Ag, 0.1 to 3.0 percent of LaB6 and the balance of titanium and inevitable impurities. The method comprises the following steps of: weighing titanium powder, aluminum powder, molybdenum powder, aluminum-vanadium intermediate alloy powder, silver powder and lanthanum hexaboride powder with certain particle size according to the mass percentage of the components; uniformly mixing the powder by a mixing method; preparing a green compact with a certain shape by a compression molding process; placing the green compact in a vacuum hot pressing sintering furnace to sinter; and cooling the green compact along with the furnace to obtain silver and titanium boride particle-containing powder metallurgy titanium alloy. The technological process is simple; the silver powder is added during the mixing of the materials to improve the molding property of the green compact; the lanthanum hexaboride powder is added to perform reaction in situ so as to generate titanium boride dispersion enhanced matrix alloy; the compactness of the sinter compact is further improved by hot pressing sintering; and thus the novel powder metallurgy titanium alloy with high compactness and high strength is obtained.

The invention provides a copper based powder metallurgy high speed brake lining, which comprises a steel backing, a brake block, a framework, a spring washer and a swollen tail block. In the course of braking, the brake lining has smaller abrasion loss and can effectively prevent the edge dropping, angle dropping and camber wear of the brake block. The brake block uses copper based powder metallurgy friction material; copper powder, iron powder, tin powder, chromium powder, titanium powder, nickel powder, bismuth meal, graphite, boron nitride, aluminum oxide, silicon dioxide, zirconite and the like are well blended according to the proportion, stamped and sintered on the framework after cold pressing. The copper based powder metallurgy high speed brake lining has the characteristics of high mechanical strength, good thermal conduction, good thermal stability, strong heat-resistant fade performance, long service life, small abrasion on a retarding disc and stable friction performance and the like, and can effectively control very high way trains with 200-300km/h per hour.

The invention discloses a preparation method of medical porous titanium and titanium alloy, which comprises the following steps: proportionally preparing titanium powder, alloy element powder and pore forming agent powder according to needs; carrying out ball milling, mixing and mechanical pressing by a powder metallurgy blank making technique to obtain a blank; putting the blank in a thermal insulation barrel, and putting the thermal insulation barrel into a microwave sintering furnace; and after vacuumizing the furnace chamber to a vacuum degree of 0.1Pa, charging argon with the purity of 99.999% to form cyclic protection, controlling the output power of the microwave sintering furnace at 0.5-3kW, heating to the sintering temperature of 800-1200 DEG C at the heating rate of 5-40 DEG C/minute, keeping the temperature for 5-30 minutes, shutting down the microwave source, and carrying out furnace cooling to obtain the medical porous titanium and titanium alloy. The invention has the advantages of simple preparation method, short sintering period, high efficiency, low sintering temperature and low energy consumption; and the sintered porous titanium and titanium alloy have excellent mechanical properties, and can be used as alternate repair material for bones, joints, artificial radix dentis and other hard tissues.

The present application relates to a blade of a rectifier of a low pressure compressor of an axial turbomachine. The blade can also be a rotor and/or turbine blade. The blade includes a composite material with a matrix and a reinforcement comprising a mesh with rods. The rods of the reinforcement are connected to each other and are distributed throughout the volume between the pressure side surface and the suction side surface of the blade. The mesh forms a three-dimensional structure extending over the majority of the thickness of the blade between the pressure side surface and the suction side surface and/or the majority of the length of the blade between the leading edge and the trailing edge. The present application also relates to an iterative method for manufacturing a blade composite where the reinforcement is formed by additive layer manufacturing based on titanium powder and then placed in an injection mold.

The invention relates to a plasma atomization method and apparatus for preparing spherical pure titanium or titanium alloy powder, and belongs to the technical field of preparation of titanium or titanium alloy powder. The plasma atomization method for preparing pure titanium or titanium alloy powder comprises the following steps of (1) preparing a titanium wire or titanium alloy wire with the diameter ranging from 3 millimeters to 20 millimeters, (2) using a plasma torch to fuse and atomize the titanium wire or titanium alloy wire in an atomization bin with an argon atmosphere to obtain atomized pure titanium particles or titanium alloy particles, and (3) feeding argon flow with the temperature ranging from 300 DEG C to 500 DEG C into the atomization bin, carrying out laminar cooling on the atomized pure titanium particles or titanium alloy particles to obtain pure titanium or titanium alloy powder. The obtained powder is good in degree of sphericity and low in the content of satellite balls, and has the advantages of being uniform in size distribution, high in purity and degree of sphericity, good in liquidity, low in oxygen content and impurity content, free of bond or cluster phenomenon and the like. The prepared titanium powder can be widely applied to the forming manners such as metal additive manufacturing, powder injection moulding and hot isostatic pressing for manufacturing parts with high precision.

The invention discloses a rapid thermal pressed sintering molding process for titanium-aluminum alloy targets. A rapid thermal pressed powder molding process is adopted to sinter and mold materials under the combined action of heat and force, and the characteristic that aluminum in the Ti-Al mixture has a low melting point is utilized to bond titanium powder together so as to obtain needed titanium-aluminum alloy targets with various components; and accordingly, titanium-aluminum alloy targets with various components in various dimensions can be prepared, have high compactness, small grains and even components and can satisfy the requirements of large-scale industrialization. The rapid thermal pressed sintering molding process for the titanium-aluminum alloy targets has the advantages of short flows, low cost, hardly oxidated powder, high compactness, good filming effect, even components and large dimensions.

The invention relates to a graphene reinforced titanium-based composite and a preparation method thereof and belongs to the field of composites. The preparation method of the composite comprises the following steps of mixing graphene powder with absolute ethyl alcohol, then conducting ultrasonic dispersion, adding titanium powder in the stirring process, and obtaining mixed slurry; transferring the obtained mixed slurry into a ball milling pot, and conducting ball milling; removing the absolute ethyl alcohol from the slurry obtained after the ball milling, and obtaining powder; drying the obtained powder in a vacuum drying oven, and obtaining dried powder; placing the dried powder into a graphite die, introducing argon into a hot pressing furnace, applying 2-2.12 t of pressure to the graphite die, conducting heating till the temperature reaches 900-1300 DEG C at the heating rate of 10-12 DEG C/min, preserving the heat for 1-1.5 hours, conducting natural cooling till the room temperature is reached, and obtaining the graphene reinforced titanium-based composite, namely the product in the graphite die. The preparation method is simple in process, graphene is distributed uniformly in the obtained composite, and the impurity content is low.

The invention provides a preparation method of high-purity micro-fine low-oxygen titanium powder, which belongs to the technical field of powder preparation in the powder metallurgy process. The preparation method is characterized by combining hydrogenation and dehydrogenation with a jet milling process, firstly carrying out hydrogenation treatment on a titanium sponge to prepare titanium hydride powder, then utilizing a jet mill to break the titanium hydride, then carrying out vacuum dehydrogenation, and finally utilizing the jet mill to carry out breaking gradation and vacuum package and obtaining a titanium powder product. Compared with the traditional ball milling process, the jet milling process causes no pollution, and iron impurities caused by collision of steel balls in the ball milling process can be avoided; due to jet milling and high-vacuum dehydrogenation treatment, the content of oxygen can be controlled to be lowest, and the powder taking and packaging operations are respectively carried out in a glove box, so that the powder and the air are isolated in the whole process, and further, the prepared high-purity micro-fine low-oxygen titanium powder is prepared.

The invention relates to a preparation method of an aluminum-based boron carbide neutron absorption composite material. The preparation method comprises the following steps of: according to the characteristics of a neutron absorption composite material, grinding, blanking, cold-pressing, baking, hot-pressing raw materials of aluminum powder, silica powder, titanium powder and boron carbide powderby using a powder metallurgic method to prepare the aluminum-based boron carbide neutron absorption composite material in a vacuum state. The tempering quantitative treatment is carried out on the aluminum-based boron carbide neutron absorption composite material so that chemical and physical properties of the aluminum-based boron carbide neutron absorption composite material are more stable. Thepreparation method has the advantages of advanced and reasonable process, continuity and compact, detailed and accurate data, reasonable material proportioning, stable chemical and physical properties and mechanical property and favorable product purity as high as 99.5% and is ideal. Various neutron absorption parts can be prepared by using the aluminum-based boron carbide neutron absorption composite material.

The invention discloses a pure titanium powder forming method based on a selected area laser melting technology. The method comprises the steps that A. an optimizing comparison method is used for obtaining the optimum machining parameters of pure titanium powder forming; B. a three-dimensional model of a part structure which needs to be manufactured is established; C. the established three-dimensional model is subjected to layering preprocessing; D. the obtained optimum machining parameters are used as 3D printing parameters, the three-dimensional model after layering preprocessing is subjected to layering processing, and accordingly printing files needed by 3D printing are generated; and E. the generated printing files are guided into 3D printing equipment, and pure titanium powder is used as forming materials for 3D printing. The method is based on the selected area laser melting technology, metal parts of various structures can be accurately manufactured according to practical needs, the optimizing comparison method is used for obtaining the optimum machining parameters of pure titanium powder forming, different optimum machining parameters can be set according to practically-needed mechanical property situations, flexibility is high, and dynamic performance is good. The pure titanium powder forming method can be widely used in the field of automation control.

The invention discloses a preparation method of a biomedical porous pure-titanium implant material. The method comprises the steps of S1, constructing a three-dimensional model of the implant material through drawing software, slicing through layering software, conveying the obtained two-dimensional section information to a computer control system of an SLM former, and providing a laser scanning route; S2, paving a layer of titanium powder being 30 to 70 microns in thickness on a workbench of the SLM former through a powder paving layer; S3, performing selective laser meting for the titanium powder through a laser beam under the conditions that the power is 90 to 100W, the scanning spacing is 0.10 to 0.20mm, and the scanning speed is 275 to 540mm/s to obtain a layer of sections of the implant material, and synchronously lowering down the worktable in a distance equal to the height of a layer of powder; S4, repeating the steps 2 and 3 until the three-dimensional model of the implant material is formed; S5, automatically stopping working by the SLM former, cooling the three-dimensional model to reach room temperature, then performing sand blasting to obtain the porous pure-titanium implant material; the three-dimensional model is a porous structural mode using a tetrakaidecahedron unit as a dot matrix and formed by repeatedly accumulating the tetrakaidecahedron units.

The invention provides a selective laser melting forming method for preparing a titanium alloy component. The method comprises the steps as follows: firstly, after being subjected to ball-milling and mixing, titanium alloy powder is delivered to a selective laser melting quick forming device, and the titanium alloy component is formed according to a component CAD image imported into the selective laser melting quick forming device; secondly, during a forming process, a mixture of 35-45% of nitrogen and 55-65% of argon is input by the flow rate of 3-5 liter per minute at the same time, a self-propagating high-temperature synthetic reaction is performed on the titanium and the nitrogen under the temperature ranging from 1220 DEG C to 1480 DEG C so as to generate titanium nitride, and titanium carbide is generated through the reaction of the titanium and the carbon in graphite under the temperature ranging from 1260 DEG C to 1523 DEG C under the argon condition; thirdly, the titanium nitride and the titanium carbide generated from the reactions are melted with the titanium alloy component as an organic whole; fourthly, the formed titanium alloy component is subjected to segmental cooling. Through adopting the technical scheme of the method, the generated titanium alloy component has better abrasive resistance and corrosion resistance, and besides, the fact that the film layers of the traditional titanium nitride and titanium carbide composite coatings are easy to peel off from the titanium alloy is avoided, and the surface of the titanium alloy is not needed to be subjected to coating and anticorrosive treatment additionally, so that the cost is saved, and no other additional processing procedures are required.

The invention provides manufacturing methods of a tungsten-titanium alloy target billet and a target material. The manufacturing method of the tungsten-titanium alloy target billet comprises the following steps: loading tungsten and titanium powder into a mold; and carrying out a cold-press moulding process and a vacuum hot pressed sintering process so as to prepare the tungsten and titanium powder in the mold into the tungsten-titanium alloy target billet, wherein the parameters of the vacuum hot pressed sintering process are as follows: the vacuum degree is less than or equal to 100Pa, the pressure is 20-30MPa, the sintering temperature is 1300-1600 DEG C and the sintering time is 3-12 hours. By utilizing the manufacturing method of the tungsten-titanium alloy target billet provided by the technical scheme of the invention, the obtained tungsten-titanium alloy target billet is uniform in microstructure and high in compactness, has no cracks and accords with semiconductor sputtering; and the tungsten-titanium alloy target billet obtained by utilizing the manufacturing method of the tungsten-titanium alloy target billet is low in cost.