7 results about "Titanium aluminide" patented technology

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.

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 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 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.

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.