227 results about "Titanium based alloy" patented technology

The invention belongs to the field of titanium-based alloys, and particularly relates to a novel heat-resisting titanium alloy and a processing and manufacturing method and application thereof. The processing and manufacturing method comprises the composition elements of alloy components, smelting, heat processing, heat treatment and the like, wherein the alloy components are as follows (in percentage by weight): 5.4%-6.3% of Al, 3.0%-5.0% of Sn, 2.5%-6.4% of Zr, 0.0%-0.96% of Mo, 0.25%-0.5% of Si, 0.2%-0.5% of Nb, 0.3%-3.4% of Ta, 0.2%-1.6% of W, 0.0%-0.07% of C, less than or equal to 0.17% of O, less than or equal to 0.03% of Fe and the balance of Ti and inevitable impurity elements. The novel heat-resisting titanium alloy disclosed by the invention can obtain different matching of tensile strength, plasticity, permanence, creep strength and heat stability through the combination of different heat processing process and heat treatment processes, can be used for manufacturing parts, namely blades, coil assemblies and the like which are positioned on the high-temperature parts of an advanced aircraft engine, is used for a long time within a range of 600-650 DEG C, can also be used for manufacturing high temperature-resistant structural members, namely aerospace craft skin and the like, is used for a short time at about 700 DEG C and can be used as a material and the like used for high temperature-resistant corrosion-resistant valves of an automobile and a boiler.

An erosion resistant protective structure for a turbine engine component comprises a shape memory alloy. The shape memory alloy includes nickel-titanium based alloys, indium-titanium based alloys, nickel-aluminum based alloys, nickel-gallium based alloys, copper based alloys, gold-cadmium based alloys, iron-platinum based alloys, iron-palladium based alloys, silver-cadmium based alloys, indium-cadmium based alloys, manganese-copper based alloys, ruthenium-niobium based alloys, ruthenium-tantalum based alloys, titanium based alloys, iron-based alloys, or combinations comprising at least one of the foregoing alloys. Also, disclosed herein are methods for forming the shape memory alloy onto turbine component.

Methods for making various titanium base alloys and titanium aluminides into engineering components such as rings, tubes and pipes by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent centrifugal casting of the melt in the graphite molds rotating along its own axis under vacuum or low partial pressure of inert gas are provided, the molds having been fabricated by machining high density, high strength ultrafine grained isotropic graphite, wherein the graphite has been made by isostatic pressing or vibrational molding, the said molds either revolving around its own horizontal or vertical axis or centrifuging around a vertical axis of rotation.

The invention refers to the non-ferrous metallurgy, i.e. to the creation of the modern titanium alloys, having the high genericity. Titanium-base alloy contains aluminum, vanadium, molybdenum, chromium, iron, zirconium, oxygen and nitrogen. Herewith the components of the alloy have the following ratio by weight %; aluminun—4.0-6.0; vanadium—4.5-6.0; molybdenum—4.5-6.0; chromium—2.0-3.6; iron—0.2-0.5; zirconium—0.1-less than 0.7; oxygen—0.2 max; nitrogen—0.05 max; titanium—balance. Technical result—creation of the titanium alloy with the required strength and plastic properties. The alloy may be used to produce the wide range of the products including the large-size forgings and die-forgings as well as semiproducts of small section, such as bars and plates up to 75 mm thick.

Lightweight metal matrix composites containing a skeleton structure of titanium, titanium aluminide, or Ti-based alloy are manufactured by low temperature infiltration with molten Mg-based alloy or Mg-Al alloy at 450-750° C., with molten In, Pb, or Sn at 300-450° C., or with molten Ag and Cu at 900-1100° C. The skeleton structure with a density of 25-35% is produced by loose sintering of Ti or Ti-based alloy powders. A primary deformation of the Ti skeleton structure before the infiltration is carried out by cold or hot rolling or forging to obtain a porous flat or shaped preform with a porosity <50% and pores drawn out in one direction such as the direction of future rolling of the composite plate. A secondary deformation of the infiltrated preform is carried out by multistage cold, or especially hot rolling, to refine the microstructure of the infiltrated skeleton structure and transform it into the textured microstructure strengthened by intermetallic phases such as TiAl, Ti3Al, and TiAl3. Subsequent re-sintering or diffusion annealing form a fully dense final structure of the resulting material having improved mechanical properties. The molten Mg-based infiltrate is alloyed with Al, Si, Zr, Nb, and/or V with the addition of TiB2, SiC, and Si3N4 sub-micron particles as infiltration promoters. The molten Ag- or Cu-based infiltrate can be alloyed with elements depressing its melting point. The method allows for control of the microstructure of composite materials by changing parameters of deformation, infiltration, and heat treatment. The method is suitable for the manufacture of flat or shaped metal matrix composites having improved ductility, such as lightweight bulletproof plates and sheets for aircraft and automotive applications, composite electrodes, heat-sinking lightweight electronic substrates, sporting goods such as helmets, golf clubs, sole plates, crown plates, etc.

Titanium-based alloy contains, % by mass: aluminum 2.2 to 3.8; vanadium 4.5 to 5.9; moloybdenum 4.5 to 5.9; chromium 2.0 to 3.6; iron 0.2 to 0.8; zirconium 0.0l to 0.08; carbon 0.01 to 0.25; oxygen 0.03 to 0.25; titanium being the balance. The alloy possesses high ability to volume deformation in cold state (is easily rolled into rods), does not have tendency to form high-melting inclusions and is efficiently enforced with thermal treatment with obtaining of high level of strength and plasticity characteristics.

The invention discloses a low-pressure-drop nano/microstructure filler revolving bed supergravity device and application thereof and belongs to the technical field of supergravity. The supergravity device comprises a rotating part formed by arranging a rotor and a filler in a closed shell, wherein the shell and an upper cover have a liquid inlet, a liquid outlet, a gas inlet and a gas outlet; and a liquid distributor extending into a central cavity of the rotor is arranged in the liquid inlet. In the device, the filler in the rotating part is a structuralized SiC, sintered ceramic and powder sintered titanium-based alloy filler with a nano/microstructure, the runner diameter of the structuralized filler is 0.1 to 5mm, the porosity is 55 to 97 percent, the surface of the filler has a 0.01 to 3-micrometer convexoconcave nano/microstructure, and the specific surface area of the filler is 200 to 2,000m<2>/m<3>. When the device is used for deeply removing sulfur dioxide from industrial gases such as sulfuric acid industrial tail gas with low-pressure-drop requirement, the pressure drop of the supergravity device is lowered by 40 to 80 percent, and the harmful gas content after treatment is lower than 20 to 100ppm.

The invention discloses a method for manufacturing spherical niobium and titanium-based alloy powder with a small particle size. The spherical niobium and titanium-based alloy powder is manufactured by the aid of vacuum induction melting, hydrogen treatment and plasma spheroidization technologies. The method includes firstly, manufacturing niobium and titanium-based spherical alloy ingots by the aid of the vacuum induction melting technology to realize a purification melting effect, reducing the quantity and the size of non-metallic inclusion to the greatest extent and performing homogenization thermal treatment on the niobium and titanium-based spherical alloy ingots to obtain ingots with uniform alloy contents; secondly, performing hydrogen treatment on the ingots to acquire hydrogen absorption niobium and titanium alloy powder; thirdly, sieving the hydrogen absorption niobium and titanium alloy powder, and then performing plasma spheroidization on the hydrogen absorption niobium and titanium alloy powder. The method has the advantages that output power, the powder feeding rate and the airflow rate are optimized in spheroidization procedures, accordingly, hollow powder can be prevented, and the fine powder yield can be increased; the spherical powder obtained by the method is excellent in dispersibility and flowability and uniform in particle size; the niobium and titanium-based alloy powder finally manufactured by the method is small in particle size, uniform in composition, good in flowability, high in spheroidization rate and low in oxygen content and is applicable to the technical field of injection molding, quick molding and thermal spraying.

A core-shell structured alloy powder for additive manufacturing, an additively manufactured precipitation dispersion strengthened alloy component, and a method for additively manufacturing the component are provided. The alloy powder comprises a plurality of particles, where one or more of the plurality of particles comprise an alloy powder core and an oxygen or nitrogen rich shell disposed on at least a portion of the alloy powder core. The alloy powder core comprises an alloy constituent matrix with one or more reactive elements, where the reactive elements are configured to react with oxygen, nitrogen, or both. The alloy constituent matrix comprises stainless steel, an iron based alloy, a nickel based alloy, a nickel-iron based alloy, a cobalt based alloy, a copper based alloy, an aluminum based alloy, a titanium based alloy, or combinations thereof. The alloy constituent matrix comprises reactive elements present in a range from about 0.01 weight percent to 10 weight percent of a total weight of the alloy powder.

The invention discloses a titanium-based alloy induction melting bottom leakage type vacuum suction casting device and a control method, relates to the technical field of titanium-based alloy melting suction casting and solves the problems of low efficiency, high cost, complicated technology and the like of an existing titanium-based alloy melting suction casting device. The titanium-based alloy induction melting bottom leakage type vacuum suction casting device provided by the invention can be used for carrying out vacuum induction melting on titanium-based alloy by adopting a ceramic crucible; since no any shielding effect works on an electromagnetic force by ceramic, all electromagnetic induction energy generated by an induction coil can totally act on titanium metal, energy saving and environment protection are realized, the utilization rate of metal raw materials is up to 60%-70%, and the metal cost is greatly reduced; an isolating layer is formed on the inner surface of a crucible body of the ceramic crucible, materials which are used for manufacturing the isolating layer comprise yttrium oxide, the yttrium oxide has good inertia on the titanium metal under high temperature and can be used for isolating ceramic materials which can react with the titanium metal during a melting process, and titanium-based alloy melting is enabled to be reliably proceeded.

A titanium base alloy powder having lesser amounts of aluminum and vanadium with an alkali or alkaline earth metal being present in an amount of less than about 200 ppm. The alloy powder is neither spherical nor angular and flake shaped. 6/4 alloy is specifically disclosed having a packing fraction or tap density between 4 and 11%, as is a method for making the various alloys.

A bucket for use in the low-pressure section of a steam turbine engine is provided. The bucket has a vane length of at least about 45 inches. The bucket is comprised of a dovetail section disposed near an inner radial position of the bucket, a tip shroud disposed near an outer radial position of the bucket and a part span shroud disposed at an intermediate radial position. The intermediate radial position is located between the inner and outer radial positions. The bucket is comprised of a titanium-based alloy having between about 2% and about 6.25% by weight aluminum, up to about 3.5% vanadium, up to about 2.25% tin, up to about 2.25% zirconium, between about 1.75% and about 5.0% molybdenum, up to about 2.25% chromium, up to about 0.7% silicon and up to about 2.3% iron, with the balance being titanium.

The invention discloses a method for preparing a titanium product. The method is characterized by adopting pure titanium or titanium alloy powder as material and preparing the titanium product by laser sintering. A three-dimensional design or reversely reconstructed three-dimensional stereo lithography (STL) data model is taken as a basis, and is converted into stereo-lithography apparatus (SLA) two-dimensional slice data serving as an instruction for the laser sintering; the pure titanium or titanium base alloy powder with certain particle size is sintered to prepare a blank which is subject to subsequent thermal treatment and polishing process to prepare the complex integrated titanium product. As the method combines the characteristics of integral design, net forming, high precision and the like, the problem of difficult processing of titanium alloy is solved, the subsequent processing cost is saved, the yield is high, and the method is suitable for preparing the titanium base products with a complex structure.

The invention provides a preparation method of an oxygen-containing titanium-based alloy through powder metallurgy, which belongs to the technical field of the preparation of powder metallurgy structured materials. Through the adoption of pure titanium powder or titanium alloy powder, an oxygen-containing titanium alloy with a high temperature is prepared by using a high-performance solid-state surface oxygen impregnating-activated sintering method. The preparation process is implemented as follows: 1) carrying out solid-state surface oxygen impregnating on pure titanium powder or titanium alloy powder at high temperature in an oxygen environment, and then cooling the obtained powder; and 2) sintering the powder subjected to high-temperature oxygen impregnating into blocks by way of activated sintering in a hot-pressing sintering furnace or a plasma sintering furnace. According to the invention, through a reasonable microstructure design, and by fully using the reinforcement action of cheap oxygen and reducing the damage thereof on plasticity, an oxygen-containing titanium-based alloy with simple compositions and a low price is prepared, so that resources can be reduced, and the cost can be reduced. The preparation method disclosed by the invention is simple in process, and can be suitable for industrial production.

The invention relates to a repeated solid solution aging thermal treatment process of titanium alloy. The process includes the steps that a titanium alloy forge is subjected to heat preservation at the temperature T for t minutes, wherein T is larger than or equal to Tbeta-15 DEG C but smaller than or equal to Tbeta+15 DEG C, t is equal to eta*delta max, delta max is the maximum section thickness of the forge and is shown in millimeters, and eta is the heating coefficient and ranges from 0.2 min/mm to 0.8 min/mm; then the forge is discharged out of a furnace to be air-cooled or wind-cooled or water-cooled to be at the room temperature, then the cooled forge is subjected to heat preservation at the temperature of T for t minutes, wherein T is larger than or equal to Tbeta-25 DEG C but smaller than or equal to Tbeta-50 DEG C, the computational formula of t is as above, namely t=eta*delta max, and the heating coefficient eta ranges from 0.3 min/mm to 1.2 min/mm; then the forge is discharged out of the furnace to be air-cooled or wind-cooled or water-cooled to be at the room temperature, the cooled forge is subjected to heat preservation at the temperature T ranging from 540 DEG C to 600 DEG C, and the heat preservation time t ranges from 0.5 hour to 2 hours; the forge is discharged out of the furnace to be air-cooled to be at the room temperature, the cooled forge is subjected to heat preservation at the temperature T ranging from 400 DEG C to 540 DEG C, and the heat preservation time t ranges from 4 hour to 24 hours; and then the forge is discharged out of the furnace to be air-cooled to be at the room temperature. The repeated solid solution aging thermal treatment process of the titanium alloy is suitable for thermal treatment of near-beta type, metastable beta type and steady beta type ultrahigh-toughness titanium alloy so as to obtain required microscopic structures with high overall performance and multi-scale precipitated phases mixed.

A metallic article is prepared by first furnishing at least one nonmetallic precursor compound, wherein all of the nonmetallic precursor compounds collectively containing the constituent elements of the metallic article in their respective constituent-element proportions. The constituent elements together form a titanium-base alloy having a stable-oxide-forming additive element therein, such as magnesium, calcium, scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, and mixtures thereof. The stable-oxide-forming additive element forms a stable oxide in a titanium-based alloy. At least one additive element is present at a level greater than its room-temperature solid solubility limit in the titanium-base alloy. The precursor compounds are chemically reduced to produce an alloy material, without melting the alloy material. The alloy material may be consolidated. The alloy material, or consolidated metallic article, is thereafter desirably exposed to an oxygen-containing environment at a temperature greater than room temperature.

The invention belongs to the field of titanium-based alloys, and specifically relates to a preparation method of a high-temperature titanium alloy bar material, wherein the preparation method includesthe steps: heating a prepared TC25G titanium alloy ingot to 1100 DEG C-1200 DEG C, and then cogging and forging in a beta phase region by a fast forging machine or a hydraulic press; heating to 1030DEG C-1100 DEG C, repeatedly carrying out upsetting and drawing-out forging by the fast forging machine or the hydraulic press, then heating the forged blank to T[beta]-110 DEG C-T[beta]-20 DEG C (T[beta] is a [alpha]+[beta]/[beta] phase transition temperature of an TC25G titanium alloy), and repeatedly carrying out upsetting and drawing-out forging by the fast forging machine or the hydraulic press; and finally, heating the forged blank after forging to T[beta]-110 DEG C-T[beta]-30 DEG C, and drawing out to the required size by the fast forging machine or the hydraulic press, to obtain the titanium alloy bar material with a low-power structure of blurred crystals and a uniform high-power structure. The prepared TC25G titanium alloy bar material has high tensile strength of the bar material at room temperature and high temperature, good thermal stability and high fracture toughness after double heat treatment. The preparation method has the advantages of convenient operation and strongprocess controllability, and the prepared TC25G titanium alloy bar material has good batch stability.

Alloys of titanium with 20-22 at. % niobium and 12-13 at. % zirconium. The alloys are prepared by mechanical alloying of elemental powders and densification by spark plasma sintering. The alloys have a nano-scaled, equiaxed granular structure, a microhardness of at least 650 HV and a modulus of 90-140 GPa. The inventive alloy is corrosion resistant, biocompatible, and is of a higher wear resistance and durability compared to the Ti-6Al-4V alloy. The bioactive surface of the inventive nanostructured alloy promotes a higher protein adsorption that stimulates new bone formation than other titanium-based alloys. These alloys are suitable for various biomedical and dental applications.

The invention relates to application equipment for the smelting and mix-melting technology of titanium-based alloy, in particular to an electromagnetic induction vacuum device for titanium-based alloy smelting and mix-melting. The electromagnetic induction vacuum device comprises a furnace, a water-cooled copper crucible is arranged in the furnace, and a sprue cup and a casting mold are sequentially arranged under the water-cooled copper crucible. The water-cooled copper crucible comprises a plurality of arc copper blocks insulated from one another, and copper block gaps free of leakage of melt are formed between the adjacent arc copper blocks. The arc copper blocks are cooled through internal circulating water. An electromagnetic induction coil is arranged outside the water-cooled copper crucible and connected with the input end of a medium-frequency power supply.

The invention relates to a method for electrochemical coloring of metallic titanium and titanium-based alloys. Through electrochemical coloring at normal temperature and under normal pressure, the electrochemical anode on the surface of metallic titanium and a titanium-based alloy can be rapidly oxidized to blue, yellow and other colors, and the corrosion resistance and wear resistance of metallic titanium and titanium-based alloys can be effectively improved. The method provided by the invention has the advantages of low cost, environment friendliness, high efficiency and simple process, is easy for industrial application, and has wide application prospect.