6259 results about "Titanium alloy" patented technology

Methods and compositions relating to powder metallurgy in which an amorphous-titanium-based metal glass alloy is compressed above its glass transition temperature Tg with a titanium alloy powder which is a solid at the compression temperature, to produce a compact with a relative density of at least 98%.

An artificial spinal joint, consisting of a flexible or rigid member or a pair of moveably-joined, flexible or rigid segments, is formed into a spring-like shape, whose distal ends have feet with slots through which screws can be inserted to attach the artificial joint to vertebra whose facets (joints) are non-functional. The artificial spinal joint is able to prevent subluxation of the spine, while retaining the mobility of the spine and permitting angular deflection of the vertebra above and below a non-functional spinal joint. A jig is used to position tools and make passageways for screws to attach the artificial spinal joint to the vertebra or its pedicles or facets in a minimally invasive procedure. The rigid members or segments are bio-compatible and may be made of titanium, a titanium alloy, tantalum, medical grade stainless steel or carbon fibers in a matrix of a rigid, durable plastic. The flexible members or segments may be made of spring steel coated with a durable, bio-compatible material, small diameter carbon fibers in a flexible, durable plastic matrix, or a single shape or dual shape, superelastic memory metal. The feet, made of any of the rigid or flexible materials described above, may also be moveably attached to the proximal ends of the members or segments. Having the feet moveably attached to the segments facilitates insertion of the artificial spinal joint into the body by folding the feet parallel to the axis of the segments during insertion, and then unfolding the feet for attachment to the vertebra or its pedicles or facets. The artificial spinal joint may be inserted and attached to vertebra whose facets are non-functional in minimally invasive, moderately invasive or conventional surgical procedures.

Golf clubs and club-heads for same are disclosed. An exemplary club-head has a hollow body and a face plate. The body defines a front opening and a face support, wherein the face plate is affixed to the face support and covers the front opening. The “face portion” of the club-head has a face area (A_f, in mm²) and a face mass (M_f, in grams), wherein A_f>5400 mm², and in a plot of M_f as a function of A_f, M_f is below M_f=0.0072(A_f)+18. At least a portion of the face plate can be made of composite. E.g., the face plate can include a composite plate made of carbon fiber and cured epoxy resin. The strike face of the face plate can include a composite plate and a cap bonded to the composite plate on the strike face. The cap can be made of a metallic material, such as (but not limited to) titanium alloy or stainless steel.

A mediator molecule is immobilized on the surface of a metallic or ceramic implant material. An anchor molecule such as a dialdehyde having a functional group that covalently binds the mediator molecule is covalently bound to the surface, and the mediator molecule is coupled to the functional group of the anchor molecule. The implant material may be composed of titanium, titanium alloy, aluminum, stainless steel or hydroxylapatite. Oxide units on the surface of the implant material can be increased preferably by treating with hot chromic-sulphuric acid for 0.5 to 3 hours at a temperature between 100 to 250° C. prior to binding the anchor molecule. Also, prior to binding the anchor molecule, the surface of the implant material can be activated by reacting with a silane derivative. Mediator molecules include BMP protein, ubiquitin and antibiotics, and the implant material may be an artificial joint or coronary vessel support such as a stent.

An embolization device for occluding a body cavity includes one or more elongated, expansible, hydrophilic embolizing elements non-releasably carried along the length of an elongated filamentous carrier that is preferably made of a very thin, highly flexible filament or microcoil of nickel/titanium alloy. At least one expansile embolizing element is non-releasably attached to the carrier. A first embodiment includes a plurality of embolizing elements fixed to the carrier at spaced-apart intervals along its length. In second, third and fourth embodiments, an elongate, continuous, coaxial embolizing element is non-releasably fixed to the exterior surface of the carrier, extending along a substantial portion of the length of the carrier proximally from a distal tip, and optionally includes a lumenal reservoir for delivery of therapeutic agents. Exemplary methods for making these devices include skewering and molding the embolizing elements. In any of the embodiments, the embolizing elements may be made of a hydrophilic, macro-porous, polymeric, hydrogel foam material. In the second, third and fourth embodiments, the elongate embolizing element is preferably made of a porous, environmentally-sensitive, expansile hydrogel, which can optionally be made biodegradable and/or bioresorbable, having a rate of expansion that changes in response to a change in an environmental parameter, such as the pH or temperature of the environment.

Disclosed herein are titanium-tungsten alloys and composites wherein the tungsten comprises 0.5% to 40% by weight of the alloy. Also disclosed is a method of making such alloys and composites using powders of tungsten less then 3 μm in size, such as 1 μm or less. Also disclosed is a method of making the titanium alloy by powder metallurgy, and products made from such alloys or billets that may be cast, forged, or extruded. These methods of production can be used to make titanium alloys comprising other slow-diffusing beta stabilizers, such as but not limited to V, Nb, Mo, and Ta.

A method for coating a surface of a component formed from aluminum or an alloy thereof includes the step of cold gas-dynamic spraying a powder material on the component surface to form a coating, the powder material comprising at least one alloy from the group consisting of titanium, a titanium alloy, nickel, a nickel alloy, iron, an iron alloy, aluminum, an aluminum alloy, copper, a copper alloy, cobalt, and a cobalt alloy. In one embodiment, the method further includes the step of heat treating the turbine component after the cold gas-dynamic spraying.

PCT No. PCT/JP95/01817 Sec. 371 Date Jun. 2, 1998 Sec. 102(e) Date Jun. 2, 1998 PCT Filed Sep. 13, 1995 PCT Pub. No. WO97/10066 PCT Pub. Date Mar. 20, 1997A method for producing titanium alloy turbine blades comprising the steps of (a) forming turbine blades of titanium alloy through hot forging or machining, (b) cooling leading edges on tip portions of the turbine blades including covers thereof formed through hot forging or machining faster than blade main body after final hot forging or solid solution treatment, and (c) heat treating the cooled turbine blades. With this method, it is possible to manufacture titanium turbine blades in an economical fashion and obtain titanium alloy turbine blades superior in reliability by preventing erosion.

It is an object of the present invention to provide an improved orthopedic implant system with satisfied biological, mechanical and morphological compatibilities. Solid metal femoral stem (entirely or partially) and solid metal acetabular head (entirely or partially) are covered with diffusion-bonded foamed-shaped sheet made of commercially pure titanium or titanium alloy(s). The open-cells in said foamed metal sheet are impregnated with biocompatible polymethyl methacrylate resin cement, which is reinforced with selected oxides (e.g., alumina, magnesia, zirconia, or a combination of these oxides) along with an application of a small amount of a metal primer agent.

The invention provides a novel high-temperature Ti alloy with high heat resistance and high heat stability. The alloy contains eutectic Nb, Ta and Mo elements. Based on the appropriate proportion of these three elements, the alloy is superior in high resistance and stability to heat and good antioxidant effect. The alloy contains (by weight) Al 5.0-6.3 percent, Sn 3.0-5.0 percent, Zr 2.5-7.0 percent, Mo 0.2-1.5 percent, Si 0.20-0.55 percent, Nb 0.2-1.0 percent, Ta 0.2-3.0 percent, C 0.01-0.09 percent, and Ti and other inevitable impurities in balance. The alloy is an ideal alternative material for high-temperature parts of aircraft engine, such as wheel disk, drum barrel, barrel shaft and blade.

A biocompatible titanium alloy with low modulus comprising alpha'' phase as a major phase and containing from about 6 to about 9 wt % of molybdenum, from 0 to about 1 wt % of an alloying element and the balance titanium. The alloying element is niobium and/or zirconium. The biocompatible titanium alloy is suitable for use as a material for a medical prosthetic implant.

A method for repairing a titanium alloy surface of a turbine component includes the step of cold gas-dynamic spraying a powder material comprising at least one titanium alloy directly on the titanium alloy surface. The method may further include the steps of hot isostatic pressing the cold gas-dynamic sprayed turbine component, and performing a separate heat treating step after the hot isostatic pressing. Thus, the cold gas-dynamic spray process and post-spray processing can be employed to effectively repair degraded areas on compressor turbine components.

A process for assembling a medical device made from a nickel-titanium alloy for use in a mammalian body while avoiding the formation of stress-induced martensite and a medical device used in combination with a delivery system for deployment into the mammalian body are disclosed. By heating the nickel-titanium alloy of the medical device to a temperature above M_d, and deforming and installing the device into a delivery system or holding capsule, it is possible to avoid the formation of stress-induced martensite in the stent, which stays in the austenitic phase throughout.

The invention provides a process for forging a titanium-based material comprises the steps of: preparing a titanium-based sintered workpiece including at least one of ceramics particles and pores in a total amount of 1% or more by volume, the ceramics particles being thermodynamically stable in a titanium alloy; and heating the workpiece to a forging temperature and forging the same. In the production process, the pores or the ceramics particles inhibit the grain growth during forging. Accordingly, it is possible to carry out the forging at a relatively high temperature at which the titanium-based material exhibits a small resistance to deformation. Moreover, the titanium-based material can maintain an appropriate microstructure even after the forging. Consequently, the impact value and the fatigue strength are inhibited from decreasing.

The invention provides a processing method of titanium and titanium alloy strip coils, which comprises the steps of raw material preparation, heating, rolling, annealing, shot blasting treatment, coping, pickling, cold rolling, derosination, annealing, straightening or flattening, edge scraping, and product obtaining. According to the method, existing large steel rolling equipment of various types in the steel processing industry is fully utilized, the defect that no titanium material surface processing and treatment technology exists in the steel processing industry is overcome, the advantages of the steel processing industry are combined with the uniqueness of the titanium material processing industry, and the essential leap of titanium material processing from single plate rolling to long strip rolling plus collection and coiling is completed. By using the method, goods can be delivered in a coiled state as well as a flat plate state, the titanium material processing efficiency is improved, the titanium material processing yield is increased, and conditions are created and high quality raw materials are provided for the processing of titanium welded pipes with various diametersand longer lengths, so high efficiency, energy conservation and economization of titanium material processing are realized.

The invention provides an integral forming method of a large size thin-walled titanium alloy cylindrical part without a welding line. The integral forming method comprises the following steps of: (1) tube blank preparation by stamping; (2) high-temperature vacuum heat treatment; (3) heating power spinning thinning; (4) unheating power spinning diameter expanding; (5) repetitive and alternate conduction of steps (3) and (4) for 2-3 times; (6) high-temperature vacuum heat treatment; (7) finish turning treatment; and (8) stabilizing treatment. The integral forming method prepares the large size thin-walled titanium alloy cylindrical part without the welding line (wall thickness is 1-7mm) which has high precision and high performance by utilizing titanium alloy plates and adopting a composite technique combining a stamping method, a spinning method and a stabilizing treatment method, and solves the problems of low material utilization ratio, having longitudinal welding lines, low precision of tube performance and the like in the forging and roll bending welding forming of the large size titanium alloy thin-walled tubes.

A radiopaque nitinol medical device such as a stent for use with or implantation in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element selected from the group of chemical elements consisting of iridium, platinum, gold, rhenium, tungsten, palladium, rhodium, tantalum, silver, ruthenium, or hafnium. The added ternary element improves the radiopacity of the nitinol stent comparable to that of a stainless steel stent of the same size and strut pattern coated with a thin layer of gold. The nitinol stent has improved radiopacity yet retains its superelastic and shape memory behavior and further maintains a thin strut/wall thickness for high flexibility.

A fairway wood head comprises a stainless steel body and a cup-shaped titanium alloy face member attached by silver-nickel brazing to the body. The face member is preferably of variable thickness, being thicker at it's center than at it's outer periphery. Weights are attached at the toe and heel, respectively, of the body, to resist twisting of the head during an off-center hit. Weights are attached in the sole of the body on opposite sides of a front-to-rear center line of the head to lower the center of gravity of the head. The head has a hosel which includes a stainless steel inner portion and a titanium alloy outer sleeve portion disposed around and attached to the inner portion.

Methods of refining the grain size of titanium and titanium alloys include thermally managed high strain rate multi-axis forging. A high strain rate adiabatically heats an internal region of the workpiece during forging, and a thermal management system is used to heat an external surface region to the workpiece forging temperature, while the internal region is allowed to cool to the workpiece forging temperature. A further method includes multiple upset and draw forging titanium or a titanium alloy using a strain rate less than is used in conventional open die forging of titanium and titanium alloys. Incremental workpiece rotation and draw forging causes severe plastic deformation and grain refinement in the titanium or titanium alloy forging.

The invention discloses a processing method for a TC4 titanium alloy large-sized bar. The method comprises the following steps of: cogging and forging TC4 titanium alloy ingots for 2 to 3 heating times to obtain forging billets; 2, upsetting the forging billets repeatedly and performing drawing-out forging for 2 to 3 heating times; 3, upsetting the forging billets subjected to forging repeatedly and performing drawing-out forging for 3 to 5 heating times; and 4, performing chamfering round forging on the forging billets subjected to forging for 2 heating times to obtain the TC4 titanium alloy large-sized bar with the diameter of 200 to 400 mm and length of not less than 2,500 mm. The TC4 titanium alloy bar processed by the method has uniform and fine grains, few internal defects and high safety and accords with the domestic advanced level of the like products. In the processed TC4 titanium alloy bar, the room-temperature tensile strength is 920 to 960 MPa; the yield strength is 830 to 870 MPa; the elongation percentage is not less than 12 percent; the contraction ratio of the cross section is not less than 36 percent; flaw detection clutter reflects small signals; and the flaw detection level is high.

A golf club head having a multiple material face is disclosed herein. The golf club head has a coefficient of restitution value greater than 0.83 and a characteristic time value of less than 257 milliseconds. The golf club head is preferably composed of a titanium alloy with a polymer layer disposed over a titanium alloy front wall. A preferred polymer is a polyurethane polymer.

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 provides a numerically controlled drilling and milling processing method for a runner of a blisk of an engine. The main technical flow before drilling and milling the runner comprises the following steps: lathing each surface of a blank, performing nondestructive testing, lathing inner and outer cavities of the blisk, finely milling a needed periphery and an axial benchmark, drilling and boring an angular datum hole, drilling and milling the runner and inspecting. A part and a fixture are in peripheral seam allowance fit to limit a radial degree of freedom of the part; an end face gland and a central pull bar axially limit an axial degree of freedom of the part; and a precise positioning pin angularly limits an angular degree of freedom of the part. The method has the advantages that: by applying the drilling and milling processing method to a part machining process of the blisk of the engine having the material removing rate of over 90 percent, the method improves the processing efficiency, shortens the manufacturing period of the product, and provides a new technical means for removing a large amount of remainder materials of the blisk; and the processing of a high-temperature alloy, a titanium alloy and other difficult-to-process materials shows that the material is more difficult to process, the removing rate is bigger and the effect is more obvious.

The iron golf club head (20) of the present invention is preferably composed of three main components: a periphery member 22, a central member 24 and a face plate 26. The periphery member (22) is preferably composed of a high density material such as a nickel-tungsten alloy. The central member (24) is preferably composed of a lightweight, non-metal material. The face plate (26) is preferably composed of a titanium alloy material. The iron golf club head (20) preferably has high moments of inertia Izz and Ixx.

A programmable resistance memory element comprising alternating layers of programmable resistance material layers and stabilizing layers. The stabilizing layers may include metallic titanium or a titanium alloy. The stabilizing layers may include a telluride, such as titanium telluride.

In a process of fabricating a stent composed primarily of niobium alloyed with a trace amount of zirconium, tantalum, or titanium for hardening, the stent is annealed under vacuum in a substantially oxygen-free environment. The vacuum is preferably maintained at pressure less than 10⁻⁴ millibars, oxygen-content less than about 80 parts per million, and the annealing temperature exceeds 400° C. for at least one hour, and is preferably kept in a range from about 1100–1200° C. for several hours. This may be followed by applying a surface layer of oxide, such as iridium oxide, with a thickness of 299–300 nm to the stent.

The invention discloses a method for preparing a spherical powder material used for three-dimensional printing. The method includes the steps of raw material selecting, high-energy ball milling and radio-frequency plasma spherizing. Selected raw materials are metal or alloy powder in the step of raw material selecting; the step of high-energy ball milling is carried out under the argon shielding condition, petroleum ether serves as the ball milling medium, and the metal or alloy powder is aluminum alloy powder, or titanium alloy powder, or nickel-base alloy powder, or stainless steel powder or tungsten alloy powder; according to the step of radio-frequency plasma spherizing, the total gas flow is 100 L/min-200 L/min, the input power of plasma is 50 kW-100 kW, the negative pressure of a gas outlet of a system is minus 1000 Pa-minus 2000 Pa, and the powder conveying amount is 50 g/min-150 g/min. The manufactured spherical powder is high in sphericity degree, even in granularity, low in oxygen content and good in liquidity, has few defects and is suitable for three-dimensional printing. The method for preparing the spherical powder material used for three-dimensional printing has the advantage that the process is accurate and controllable.

The bearing rings 1 and 2 of a rolling bearing is formed of one kind of titanium alloys of beta type titanium alloys, near beta type titanium alloys and alpha+beta type titanium alloys. The titanium alloy has a surface hardness of Hv 400 or more and less than Hv 600 for increasing the corrosion resistance and wear resistance of the bearing ring. Spherical rolling elements 3 rolling on the raceway surfaces 1a and 2a of the bearing rings 1 and 2 are formed of ceramics such as silicon nitride. When beta type titanium alloys or alpha+beta type titanium alloys after a solution treatment and applied with an oxidation treatment at a low temperature of 400 to 600° C. are used as the material for the bearing ring, a bearing ring made of titanium alloy suitable to use under a circumstance requiring corrosion resistance is obtained.

The invention discloses a method for preparing a metal titanium or titanium alloy super-oleophobic surface. The method comprises the following steps of: performing primary anodic oxidation treatment on metal titanium or titanium alloy to obtain a roughened surface with a microstructure; forming a titanium dioxide nanotube array film on the surface with microstructure through secondary anodic oxidation so as to obtain a composite fine structured micro-nanostructure; and modifying with a low-surface-energy substance to obtain the super-oleophobic surface and the super-hydrophobic and super-oleophobic surface. The metal titanium or titanium alloy surface has super-oleophobic and super-hydrophobic characteristics for multiple kinds of organic liquid, the static contact angle is greater than 155 degrees; the rolling angle is less than 10 degrees; meanwhile, the surface also shows superior super-oleophobic and super-hydrophobic characteristics for pure water and aqueous solution of acid, alkali and salt.

The iron golf club head (20) of the present invention is preferably composed of three main components: a periphery member 22, a central member 24 and a face plate 26. The periphery member (22) is preferably composed of a high density material such as a nickel-tungsten alloy. The central member (24) is preferably composed of a lightweight, non-metal material. The face plate (26) is preferably composed of a titanium alloy material. The iron golf club head (20) preferably has high moments of inertia Izz and Ixx.