17 results about "Titanium aluminide" patented technology

The invention relates to the technical field of thermoplastic forming of titanium-aluminum intermetallic compounds, in particular to a non-vacuum isothermal forging method for a titanium-aluminum alloy blade and application of the non-vacuum isothermal forging method for the titanium-aluminum alloy blade. By adjusting and controlling the included angle between the extrusion direction of a titanium-aluminum alloy extrusion state raw material and a titanium-aluminum alloy blade blank, screening proper deformation texture orientation and combining specific forging forming parameters, the structure state of a forge piece is guaranteed, and the purpose of reducing the thermoplastic forming resistance of the gamma-type titanium-aluminum alloy is achieved. The titanium-aluminum alloy blade is subjected to non-vacuum isothermal forging forming through the method, the deformation resistance during alloy forming can be effectively reduced, die abrasion is reduced, the die material selection range is widened, a non-vacuum isothermal forging window is provided, and compared with traditional vacuum isothermal forging forming, the manufacturing cost of the blade is greatly reduced.

The invention discloses a high-performance gamma-based titanium-aluminum alloy and an additive manufacturing method thereof. The additive manufacturing method comprises the following steps: selecting proper titanium-aluminum alloy powder and aluminum powder; mixing the titanium-aluminum alloy powder with aluminum powder to obtain mixed powder; the mixed powder is fed into SLM equipment, printing is carried out in the inert gas protection atmosphere, a printing-state alloy blank with the density larger than or equal to 97% is obtained, and at the moment, a mixed structure of a titanium-aluminum intermetallic compound and an aluminum phase is preliminarily formed in the blank; the printed alloy blank is placed in hot isostatic pressing equipment to be subjected to hot isostatic pressing treatment; and the alloy subjected to hot isostatic pressing treatment is subjected to solid solution heat treatment. According to the method, the synergistic problem of SLM forming-defect elimination-phase regulation and control is broken through, the process chain is optimized, the gamma-phase dominated high performance is guaranteed, meanwhile, the process simplicity and cost advantages are achieved, the method is the optimal scheme for solving the titanium-aluminum additive manufacturing bottleneck at present, and the use requirement of the low-pressure turbine blade of the aero-engine is met.

The invention discloses a cutter casting method for reducing cutter abrasion and prolonging the service life of a cutter, and belongs to the technical field of cutter casting. In order to solve the problems that a high-carbon high-alloy steel tool is uneven in matrix structure, large in heat treatment residual stress, prone to tipping of a cutting edge, poor in coating interface bonding force and the like, the method comprises the steps that a high-carbon high-alloy steel blank is smelted and then poured, the matrix structure is homogenized through multi-stage heat treatment, and high-dislocation-density martensite is formed; and the cutting edge of the quenched cutter base body is subjected to rounding treatment, and then a titanium nitride bottom layer, a titanium aluminum nitride middle layer and a diamond-like carbon top layer are sequentially deposited to form a multi-layer coating. According to the method, through smelting parameter optimization, multi-stage heat treatment, cutting edge rounding and multi-layer coating structure design, the hardness and toughness of a cutter base body are effectively improved, the bonding strength of the coating is enhanced, and stress concentration and frictional wear in the cutting process are reduced. The method is mainly used in the field of metal cutting machining, can significantly prolong the service life of the cutter, and improves the machining efficiency and quality.

A display device includes: a first inorganic insulating layer; a wiring disposed on the first inorganic insulating layer; a second inorganic insulating layer covering the wiring; and a display element disposed on the second inorganic insulating layer, wherein the wiring includes a lower layer including at least one of aluminum and an aluminum alloy, an upper layer disposed on the lower layer and including at least one of titanium and titanium oxide, and an intermediate layer disposed between the lower layer and the upper layer and including titanium aluminide.

The utility model belongs to the technical field of spiral bevel gear machining, and discloses a spiral bevel gear tooth crest rounding device which comprises rounding equipment, a fixing frame is installed on the top of the rounding equipment, a cutter is arranged above an operation area of the rounding equipment, a protective cover is arranged on the outer surface of the cutter, and the protective cover is installed on the fixing frame through an external transmission system. A cooling mechanism is installed on the rounding device and comprises a high-pressure pump body installed on the fixing frame, a spray head is installed on the protective cover, the spraying direction of the spray head faces a tool bit of a tool, an oil storage tank is installed on the rounding device, a liquid inlet pipe is arranged between the high-pressure pump body and the oil storage tank, and the liquid inlet pipe is communicated with the oil storage tank. A liquid drainage channel is arranged between the spray head and the high-pressure pump body, the tool is made of hard alloy materials, and the surface of a tool bit of the tool is coated with a titanium aluminum nitride abrasion-resistant coating. According to the utility model, not only can the cutter be conveniently cooled, but also the phenomenon of tipping caused by uneven stress of heat generated by heating can be avoided.

The invention discloses a semi-spherical head milling blade which comprises a blade body, a clamping part, a cutting part and a coating part, the clamping part is arranged on the blade body and used for being connected with a cutter bar, the cutting part is arranged on the blade body and used for cutting a machined part, and the coating part is arranged outside the blade body and used for protecting the blade body. By optimizing the design of the clamping part, the cutting part and the coating part, the performance and reliability are remarkably improved, the clamping part adopts a through groove and 45-degree annular groove structure, uniform distribution of locking force is enhanced, clamping eccentricity is reduced, the problem of stress concentration of a traditional clamping mode is solved, the cutting part is provided with the S-shaped chip groove, cuttings are effectively guided to be spirally discharged, and the service life of the cutting part is prolonged. Meanwhile, the cutting edge subjected to passivating treatment is combined to improve the collapse resistance, the titanium aluminum nitride coating on the whole surface is passivated in an auxiliary mode through ion beams, the uniformity and adhesive force of the coating are ensured, and the service life of the cutter is remarkably prolonged.

The present invention provides a multi-component seal coating powder material and a preparation method thereof, belonging to the technical field of thermal spraying materials. The multi-component seal coating powder material, by mass fraction, the raw materials are 10-20 parts of titanium aluminide powder, 2-8 parts of muscovite powder, 5-15 parts of boron nitride powder, 65-75 parts of Al-based mixed powder and 0.1-5 parts of binder; the Al-based mixed powder is at least one of aluminum powder, alumina balls and alumina grinding powder. The multi-component seal coating powder material provided by the present invention has good adaptability to the plasma spraying process, and the prepared coating has high quality and stability, solving the problems of poor coating tissue uniformity, low coating bonding strength and poor abrasion resistance caused by large component fluctuations and insufficient processing process stability of traditional aluminum-based suspension coatings.

The present invention discloses a method for preparing an MXene-based (Ti3AlC2) ultra-slip anti-icing and wear-resistant surface by chemical-assisted laser texturing, comprising the following steps: step 1: etching aluminum with titanium aluminide and lithium fluoride under acidic conditions to obtain a multilayer MXene, followed by ultrasonication and centrifugation to prepare a single-layer MXene; step 2: thoroughly stirring and mixing a single-layer MXene dispersion and an inorganic adhesive dispersion, spraying the mixture onto a metal sheet surface using a spray gun, and curing the coating in an oven; step 3: using a laser to micro-texture a patterned structure on the coating surface; step 4: dispersing a silane coupling agent in anhydrous ethanol, and then performing wet chemical surface modification on the textured sample; and step 5: subjecting the textured and modified sample to a covalent bond grafting reaction with an active lubricating oil to obtain an ultra-slip anti-icing and anti-fouling surface.

Metallic matrix composites include a high strength titanium aluminide alloy matrix and an in situ formed aluminum oxide reinforcement. The atomic percentage of aluminum in the titanium aluminide alloy matrix can vary from 40% to 48%. Included are methods of making the metallic matrix composites, in particular, through the performance of an exothermic chemical reaction. The metallic matrix composites can exhibit low porosity.

The invention provides a method for preparing a low-cost TiAl alloy through high-temperature hot forming of a powder metallurgy blank, and relates to the technical field of titanium-aluminum alloys used in the fields of aerospace, vehicles and the like. The method comprises the following steps: mixing titanium-aluminum pre-alloy powder with a binder, and carrying out cold press forming; assembling the cold-pressed compact in a hot-pressed sintering mold; vacuumizing the hot-pressing sintering furnace, raising the temperature to a binder volatilization temperature under a non-pressure condition, and keeping the temperature for a certain time so as to gasify and remove the binder; raising the temperature to an alpha single-phase region of the titanium-aluminum alloy, and preserving heat for a certain time; reducing the temperature to a middle-upper temperature zone of an alpha + gamma double-phase zone; quickly pressurizing and keeping the temperature for a certain time so as to compact the powder by forging; and finally, stopping heating and pressurizing, cooling to room temperature along with the furnace, and taking out the forge piece. According to the method, the advantages of powder metallurgy and forging are combined, the machining process is shortened, the production cost is reduced, the production efficiency is improved, and the prepared forge piece is fine in structure, less in component segregation and excellent in mechanical property.

The invention relates to a nitride thermal barrier coating with extremely low thermal conductivity and high temperature resistance and a preparation method and application thereof, the nitride thermal barrier coating is a SiXN coating, the SiXN coating comprises, by atomic fraction, 10%-70% of Si, 1%-30% of X and the balance N, and X is selected from any one or more elements of Ti, Al, Zr or Cr. The minimum thermal conductivity of the nitride thermal barrier coating is 1.5 W / mK, and the nitride thermal barrier coating can bear a high-temperature environment, can be used as a thermal protection coating of a titanium-aluminum alloy and a titanium alloy, can stably work in the high-temperature environment for a short time or a long time, and reduces the surface temperature of a base material.

The application discloses a high-performance gamma-based titanium-aluminum alloy and an additive manufacturing method thereof, and the additive manufacturing method comprises the following steps: selecting suitable titanium-aluminum alloy powder and aluminum powder; mixing the titanium-aluminum alloy powder and the aluminum powder to obtain mixed powder; feeding the mixed powder into an SLM device to print under an inert gas protection atmosphere, so that a printed alloy blank with a density of greater than or equal to 97% is obtained, and at this time, a mixed structure of titanium-aluminum intermetallic compounds and aluminum phases is preliminarily formed in the blank; placing the printed alloy blank into a hot isostatic pressing device to perform hot isostatic pressing treatment; and performing solid solution heat treatment on the alloy after the hot isostatic pressing treatment. The application breaks through the collaborative difficulties of 'SLM forming-defect elimination-phase regulation', optimizes the process chain, and has the advantages of process simplicity and cost advantage while ensuring the high performance of the gamma phase, is the optimal solution for solving the bottleneck of titanium-aluminum additive manufacturing at present, and meets the use requirements of aero-engine low-pressure turbine blades.

A display device includes: a first inorganic insulating layer; a wiring disposed on the first inorganic insulating layer; a second inorganic insulating layer covering the wiring; and a display element disposed on the second inorganic insulating layer, wherein the wiring includes a lower layer including at least one of aluminum and an aluminum alloy, an upper layer disposed on the lower layer and including at least one of titanium and titanium oxide, and an intermediate layer disposed between the lower layer and the upper layer and including titanium aluminide.

The invention relates to a 1000 DEG C-resistant metal / nitride double-layer coating and a preparation method and application thereof.The metal / nitride double-layer coating comprises a metal middle layer and a nitride coating which sequentially grow along a matrix, the nitride coating (3) is composed of amorphous SixAlyCrzN1-x-y-z, x, y and z represent atomic fraction percentages, x is 1%-60%, y is 0%-60%, and z is 0%-60%. Compared with the prior art, the metal / nitride double-layer coating serves as a protective coating for the titanium-aluminum alloy or the titanium alloy, can bear the high-temperature (1000 DEG C) environment and can stably work for a long time in the high-temperature environment, and the high-temperature oxidation resistance of the titanium alloy or the titanium-aluminum alloy is remarkably improved.

The invention provides a nano ceramic particle reinforced titanium-aluminum alloy with excellent high-temperature performance and a preparation method. The preparation method comprises the following steps: mixing Ti powder, Nb powder and B powder to obtain first mixed powder; mixing the first mixed powder with Ti48Al48Cr2Nb2 pre-alloyed powder according to different proportions to obtain a second mixed powder, a third mixed powder and a fourth mixed powder; the second mixed powder, the third mixed powder and the fourth mixed powder are sequentially placed on a titanium thin strip according to a certain proportion and packaged, and a continuous mixed powder titanium cylinder is obtained; a continuous mixed powder titanium cylinder is added into a titanium-aluminum alloy through vacuum induction melting treatment to prepare the nano ceramic particle reinforced titanium-aluminum alloy with excellent high-temperature performance, the reinforced titanium-aluminum alloy has excellent strength and plasticity at high temperature, and the yield strength, the tensile strength and the fracture strain of the reinforced titanium-aluminum alloy at 800 DEG C or above are larger than or equal to 550.6 MPa, larger than or equal to 599.4 MPa and larger than or equal to 22.8% respectively.

The invention discloses titanium aluminum single crystal electrochemical machining equipment based on electric field and flow field simulation optimization, and relates to the field of titanium aluminum single crystal electrochemical machining, the surface of the titanium aluminum single crystal electrochemical machining equipment is provided with a box body with a machining groove, the machining groove is used for containing electrolyte, and bottom blocks are evenly arranged at the bottom of the box body. The control device is used for controlling the titanium-aluminum single crystal to enter electrolyte to be processed; the isolation unit is used for isolating impurities generated in the machining process, and cyclic utilization of the electrolyte is facilitated; the circulating unit is used for purifying the electrolyte, so that the electrolyte can be directly reused, the circulating unit is arranged on the inner wall of the box body, the processing unit can drive the titanium-aluminum single crystals to enter the electrolyte and realize electrochemical processing, and then the isolation unit can separate and collect precipitates generated by electrolysis; and the circulating unit can purify the electrolyte and realize cyclic utilization.

The application provides a method for connecting titanium aluminum carbide and niobium by adopting a titanium intermediate layer and a connected joint, and relates to the technical field of welding. The method comprises the following steps: S1, preparing a component to be connected; the component to be connected is formed by sequentially stacking titanium aluminum carbide base material, an intermediate layer and niobium base material from top to bottom, and the material of the intermediate layer is titanium; S2, performing discharge plasma sintering on the component to be connected under a preset air pressure to obtain a connected joint. By adopting the method, the cracking of the joint can be inhibited, the decarburization or Al evaporation of Ti3AlC2 at high temperature can be inhibited, thereby the deterioration of the base material is inhibited; the generation of brittle intermetallic compounds can be avoided, which is helpful to improve the interface bonding strength, thereby the strength of the connected joint is improved.