28 results about "Titanium based alloy" patented technology

The invention discloses an in-situ composite titanium carbide reinforced titanium-based alloy and a preparation method thereof. The in-situ composite titanium carbide reinforced titanium-based alloy comprises the following chemical components in percentage by mass: 0 < = N < = 0.010%, 0 < = H < = 0.015%, 0 < = O < = 0.2%, 0.10-0.40% of C and the balance of Ti and inevitable impurities. The preparation method comprises the following steps: mixing the titanium powder and the graphite powder, and carrying out metal laser powder bed fusion printing. According to the invention, through in-situ synthesis of nano TiC particles, the size and morphology of the TiC particles are regulated and controlled, so that the mechanical property of the titanium-based alloy is greatly improved. The titanium-based alloy with high strength and excellent elongation is obtained by using a trace interstitial element C, and is independent of solid solution strengthening, second-phase dispersion strengthening or work hardening ways of expensive rare metals such as V, Mo, Nb and the like, so that green and low-cost preparation of the titanium alloy is facilitated.

The present invention relates to a titanium alloy composition suitable for manufacturing a component by additive manufacturing, the resulting component exhibiting a relatively small primary beta grain size. The titanium alloy composition comprises 2 wt% to 7 wt% of Al, 1.5 wt% to 6 wt% of Mo, 0.25 wt% to 1.5 wt% of Bi, unavoidable impurities and the balance Ti, the balance Ti enables the sum of the total content of the components in the titanium alloy composition to be 100 wt%, and the weight percentage is based on the total mass of the titanium alloy composition.

The present invention provides a method for preparing fine low-oxygen spherical Ti-based high-entropy alloy powder, which relates to the technical field of spherical titanium-based alloy powder. The preparation method includes the following steps: selecting and processing raw materials for wire, preparing pre-alloyed wire, preparing titanium-based high-entropy alloy wire, processing titanium-based high-entropy alloy wire, establishing a gas system, high-frequency induction preheating, radio frequency plasma melting, and atomization powder production. The present invention can directly prepare Ti-based high-entropy alloy wire with uniform composition distribution at a relatively low temperature through multiple twisting, multiple continuous hot drawing, diffusion homogenization annealing, high-frequency induction preheating, radio frequency plasma melting, and atomization powder production, thereby preparing Ti-based high-entropy alloy wire with uniform composition distribution, and further preparing Ti-based high-entropy alloy fine powder with low oxygen content and uniform composition distribution. The powder is suitable for use in additive manufacturing, has high flexibility, simple operation, wide applicability, low cost, and is very suitable for large-scale industrial production.

The invention discloses a bionic dentate interlaced interlocking structure coating and a preparation method and application thereof.The preparation method comprises the steps that a transition layer of a Cu-based protruding wedge-shaped array is prepared on a base body through a laser cladding method, then the base body with the transition layer is rotated by 90 degrees, titanium-based alloy powder is clad on the surface of the base body, and then the base body with the transition layer is obtained; and finally, an interlocking structure coating of an interlocking structure among the Ti-based material surface layer, the Cu-based protruding wedge-shaped array and the base body is formed. Due to the existence of the protruding wedge-shaped microarray, the Cu surface and the Fe surface appear in a staggered mode, reflection of Cu alloy to laser is reduced, and the Ti-based composite coating can be normally cladded. Besides, due to the existence of the protruding wedge-shaped microarrays, part of coating interfaces are changed into Ti / Cu interfaces and Fe / Cu interfaces, and formation of Ti / Fe intermetallic compounds is reduced, so that the coating bonding strength is improved, and the service life of the maritime work steel and the stainless steel in the severe environment and the complex load bearing environment is prolonged.

The invention discloses a titanium-based composite laser cladding coating for regulating and controlling a Ti-B4C in-situ reaction interface through rare earth oxide and a preparation method of the titanium-based composite laser cladding coating, and belongs to the technical field of laser cladding surface strengthening. According to the method, composite cladding powder containing titanium powder, a B4C ceramic reinforced phase and rare earth oxide is fed into the surface of a titanium-based alloy matrix, and the rare earth modified titanium-based composite coating is formed under the action of laser. In the cladding process, B4C and Ti are subjected to an in-situ reaction to generate TiB and TiC strengthening phases, rare earth elements regulate and control nucleation and growth of the strengthening phases in a molten pool, TiB whisker refining is achieved, and interface bonding of a ceramic phase and a titanium matrix is optimized. According to the method, the crack sensitivity of the coating is reduced, meanwhile, tissue densification and strengthening phase uniform distribution are achieved, and the overall mechanical property of the coating is improved. The obtained coating and a titanium-based alloy matrix form stable metallurgical bonding, and the coating is suitable for wear-resistant strengthening and surface modification of the surface of a titanium-based material.

The present application belongs to the field of titanium-based alloys, and particularly relates to a conformal machining design method suitable for thick-section titanium alloy integral blade disc forgings, which comprises applicable alloy types, blade disc feature structure forms and size design and other constituent elements. The conformal machining design method is suitable for TC25G, TA33, TA37, TA38 and other titanium alloy thick-section integral blade disc forgings, can maximize the retention of key performance such as strength, and ensures that the mechanical properties of the thick-section forgings meet the design requirements. The patent technology can be used for conformal machining design of large-size thick-section integral blade disc forgings with an integral or local thickness of more than 100 mm, and meets the application requirements of advanced aero-engines for large-size thick-section integral blade disc forgings.

The present invention relates to the field of welding, and specifically to a composite brazing filler metal, a brazing filler metal sheet, a preparation method thereof, and a brazing method for brazing carbon-based materials and titanium-based alloys. The composite brazing filler metal provided by the present invention is used for brazing carbon-based materials and titanium-based materials. It has a small amount of brittle compounds, high joint strength, and high-temperature mechanical properties. It solves the bottleneck problems of large joint residual stress, low operating temperature, high brittle compounds, and excessive flow of brazing filler metal in the preparation of carbon-based materials and titanium-based alloy connection components by traditional AgCu brazing, thereby improving the performance of the connection components and the welding accuracy. Experiments have shown that the composite brazing filler metal of the present invention is used for welding carbon-based materials and titanium-based alloys, and the room temperature shear strength of the joint is high, which is 2 to 3 times that of the AgCu28 brazing filler metal joint under the same conditions. In addition, the shear strength of the joint does not decrease under high temperature conditions of 600°C, and it still maintains a high strength at 800°C (close to the welding temperature).

Titanium-based alloy powder formulations and methods for use with the powder formulations are disclosed. The formulations and methods disclosed herein enable rapid binder jet manufacturing of large high performance titanium parts.

This invention discloses an ordered phase-strengthened titanium alloy and its powder metallurgy preparation method, belonging to the field of titanium and titanium alloy processing technology. The preparation method includes the following steps: sponge titanium is sequentially subjected to hydrogenation treatment, mechanical ball milling, dehydrogenation treatment, and mixing with an intermediate alloy to obtain a titanium-based alloyed mixed powder, which is then subjected to cold isostatic pressing to obtain a compact; the compact is placed in a vacuum sintering furnace, first undergoing low-temperature pre-sintering, then switching to an argon protective atmosphere for high-temperature diffusion densification sintering, followed by segmental cooling to room temperature to obtain a sintered compact; the sintered compact is subjected to hot isostatic pressing, then slowly cooled to room temperature, and finally subjected to solution aging treatment to obtain an ordered phase-strengthened titanium alloy. By refining the powder through hydrogenation and milling, controlling the composition and microstructure through two-stage vacuum sintering, and controlling the phase transformation point through hot isostatic pressing, densification and microstructure are synergistically regulated, solving technical problems such as microstructure coarsening, decreased orderliness, cracking, and insufficient mechanical properties during the preparation of ordered phase-strengthened titanium alloy powder metallurgy products.

The present invention provides a method for preparing fine low-oxygen spherical TiAl alloy powder, which relates to the technical field of spherical titanium-based alloy powder. The preparation method includes the following steps: selecting and processing raw materials for wires, preparing TiAl composite wires, preparing TiAl alloy wires, processing TiAl alloy wires, establishing a gas system, high-frequency induction preheating, radio frequency plasma melting and atomization powder making. The present invention can directly prepare TiAl alloy wires with uniform composition distribution at a relatively low temperature through multiple twisting, multiple continuous hot drawing, diffusion homogenization annealing, high-frequency induction preheating, radio frequency plasma melting and atomization powder making, and further prepare TiAl alloy fine powder with low oxygen content and uniform composition distribution, which is suitable for use in additive manufacturing, has high flexibility, simple operation, wide applicability and low cost, and is very suitable for large-scale industrial production.

The invention provides an in-situ nano ceramic reinforced titanium-based composite material based on direct energy deposition forming and a preparation method of the in-situ nano ceramic reinforced titanium-based composite material, and belongs to the technical field of titanium-based composite materials. The preparation method comprises the following steps: taking nano ceramic particles and a titanium-based alloy as raw materials, and preparing titanium-based composite material powder by adopting a gas atomization method; and then the titanium-based composite material powder is deposited on a substrate through a laser metal deposition method, and the titanium-based composite material is obtained. The method provided by the invention is uniform in powder mixing, high in utilization rate and small in raw material loss, and the prepared material can remarkably improve the strength of the titanium alloy. By adding the nano ceramic particles, the tensile strength and the yield strength of the titanium-based composite material can be improved, and the strength of the material is improved under the condition that it is guaranteed that the elongation of the titanium alloy is not greatly changed.

The invention discloses a preparation method of a tungsten-cobalt-nickel-titanium-based alloy, which comprises tungsten powder, cobalt powder, nickel powder and titanium powder, and comprises the following steps: step A, mixing raw materials according to a weight ratio and filling the mixture into a ball mill, step B, screening the mixture and precipitating; step C, drying the precipitated slurry; step D, screening the cooled dried powder; step E, adding a proper amount of a forming agent; step F, putting the mixture containing the synthetic agent into a vibration crushing screening machine, and uniformly screening; step G, putting the mixture into a granulator for granulating and forming; step H, storing after drying; step I, sintering in a vacuum furnace and preserving heat; and J, surface oxide layer treatment is carried out after cooling and discharging. The process is simple, the machining efficiency can be improved, the machined alloy has high shock resistance, pressure resistance, corrosion resistance, breakage resistance and the like and has more uniform flowability, it is guaranteed that the stress density around a product is more uniform during pressing, and the machining cost is reduced.

The invention discloses a spheroidizing-promoting high-performance titanium alloy material and a preparation method thereof, and belongs to the field of high-toughness titanium-based alloy materials.The preparation method comprises the steps that a vacuum induction melting furnace is adopted for smelting high-purity raw materials into titanium-based alloy button cast ingots with different tin element contents; the titanium-based alloy button cast ingot is homogenized and then subjected to a segmented hot rolling process, and the high-performance titanium alloy material is obtained; according to the mechanical property and longitudinal mechanical test results of the high-performance titanium alloy material, the yield strength is 880-1080 MPa, the tensile strength is 1020-1220 MPa, and the ductility is 12.5-23%; the transverse tensile test result is as follows: the yield strength is 920-1100 MPa, the tensile strength is 1050-1290 MPa, and the ductility is 11-20%. According to the titanium-based alloy and the preparation method thereof, a Ti80 zirconium element is replaced by doped tin element, and a rolling process is regulated and controlled to promote structure spheroidization, so that the strength and ductility of the titanium-based alloy are improved.

The application provides a high-throughput test system for characterizing high-temperature titanium-based alloy casting process performance and a preparation method thereof, the system comprises a sprue cup, a trapezoidal feeding opening and a sprue, and the sprue cup, the trapezoidal feeding opening and the sprue are sequentially fixedly connected; the bottom end of the sprue is further provided with a sprue nest, and the sprue nest is externally provided with a single helix alloy fluidity sample; the alloy filling capacity sample, the alloy casting shrinkage hole / shrinkage porosity defect test sample and the mechanical property test sample are arranged between the bottom runner and the top runner; the alloy cracking tendency test sample is fixedly connected to the middle section of the sprue. The wax mold of the high-throughput test system for characterizing high-temperature titanium-based alloy casting process performance has high precision, the functional module unit is combined flexibly and conveniently, the traditional pressing mold tool and the corresponding cost can be saved, the process flow operation is simple, the cost is low, and the sample preparation and research and development time can be greatly shortened.

The preparation method comprises the following steps: (1) selecting a high-purity titanium raw material, and preparing a titanium-based hollow ingot of which the density is greater than or equal to 99.9% and the total impurity content is less than or equal to 50ppm through an electron beam cold bed furnace; (2) an Nb rod with the purity larger than or equal to 99.9% and the hollow ingot are accurately assembled, it is ensured that the gap is smaller than or equal to 0.1 mm, the concentricity deviation is smaller than or equal to 0.1 mm, and a composite consumable electrode is formed; (3) performing vacuum consumable smelting for three times, and combining with a cooling process of more than or equal to 3 hours / stage; and (4) post-processing scalping, and sawing a riser to obtain a finished cast ingot. The method has the advantages that the deviation of main element components of the cast ingot is controlled within + / -0.5%, the smelting success rate is greatly increased, the comprehensive production cost is reduced, the method is used for industrial production of the high-purity NbTi alloy cast ingot in the fields of aerospace, superconducting magnets, medical instruments and the like, and the core process can be popularized to preparation of other titanium-based alloys.

Titanium-based alloys exhibiting improved mechanical properties. The present invention relates to a titanium-based alloy in which one or more alloying elements are present, the alloy satisfying the following conditions: - 10 ≤ MOeq ≤ 14.5, - 2.77 < Bo < 2.80, and - 2.34 eV < Md < 2.38 eV, where Moeq denotes the mass content of beta-stabilizing elements in the alloy in molybdenum equivalent, where ei denotes the number of valence electrons of alloying element i, ai denotes the atomic radius of alloying element i, and xi denotes the mole fraction of alloying element i in the alloy, the sum being performed over all the alloying elements present in the alloy, Bo denotes the average bond order of the covalent bonds between titanium and the alloying elements, and Md denotes the average energy level in eV of the d orbitals corresponding to the covalent bonds between titanium and the addition elements.

The application discloses a high-performance titanium alloy material for promoting spheroidization and a preparation method thereof, and belongs to the field of high-strength and high-toughness titanium-based alloy materials, and comprises the following steps: high-purity raw materials are smelted into titanium-based alloy button ingots containing different tin element contents by using a vacuum induction smelting furnace; after homogenization treatment of the titanium-based alloy button ingots, a high-performance titanium alloy material is obtained by adopting a sectional hot rolling process; and the high-performance titanium alloy material is subjected to mechanical property testing, and the longitudinal mechanical test results are as follows: yield strength is 880-1080 MPa, tensile strength is 1020-1220 MPa, and elongation is 12.5-23%; and the transverse tensile test results are as follows: yield strength is 920-1100 MPa, tensile strength is 1050-1290 MPa, and elongation is 11-20%. The Ti80 zirconium element is replaced by doping of the tin element, and the rolling process is controlled to promote spheroidization of the structure, so that the strength and ductility of the titanium-based alloy are improved.

The invention relates to a method for surface treatment of a part (13) made of titanium or a titanium-based alloy comprising a step of removing a scale layer and an alpha-case layer by immersing the part (13) made of titanium or a titanium alloy in an ultrasonic bath of aqueous solution containing sodium hydroxide and sodium nitrate. Figure 3

The application discloses a titanium-based composite double-layer shaped charge liner and a preparation method thereof. The titanium-based composite double-layer shaped charge liner comprises an inner layer and an outer layer arranged outside the inner layer. The inner layer is a titanium-based alloy, and the outer layer is a titanium-based composite material. The titanium-based composite material comprises a ceramic reinforcing phase and a titanium-based alloy. The ceramic reinforcing phase is one or more of TiB, TiC, Ti5Si3, WC, SiC and ZrB. The titanium-based alloy comprises the following components in parts by weight: 5-20% of Al, 10-40% of Nb, 0.5-5% of RE, and the balance of Ti. The RE is one or more of La, Ce, Pr, Nd, Er, Yb and Dy. The preparation method comprises the following steps: mixing raw materials, one-time cold pressing, two-time cold pressing, sintering and mechanical processing. Compared with the prior art, the shaped charge liner can realize large-size opening and high-penetration damage effect on hard targets such as rocks and concrete.

The utility model discloses a titanium base alloy polishing and cutting machine with a cleaning structure, which relates to the technical field of polishing and cutting machines, and comprises a polishing and cutting machine body, a workbench and a support frame, the bottom of the polishing and cutting machine body is fixedly connected with the top of the support frame, the bottom of the polishing and cutting machine body is arranged on the top of the workbench, and the cleaning structure is arranged on the workbench. A movable connecting assembly is arranged on the front side of the top of the grinding and cutting machine body. The movable connecting assembly is arranged to be matched with the cleaning and collecting assembly to stably collect chippings generated by machining of the grinding and cutting machine body, and the problem that although a working table of an existing grinding and cutting machine can be cleaned in use, the grinding and cutting machine can generate more dust chippings in actual use, and the working table can not be cleaned is solved. The problems that dust and chippings splash all around and need to be cleaned by a user, inconvenience is caused in the using process, and the using effect of the grinding and cutting machine is reduced are solved, and the effect of adjusting and collecting is achieved.

The invention discloses a titanium-based composite material double-layer shaped charge liner and a preparation method thereof.The titanium-based composite material double-layer shaped charge liner comprises an inner layer and an outer layer arranged on the outer side of the inner layer, the inner layer is made of titanium-based alloy, the outer layer is made of a titanium-based composite material, and the titanium-based composite material comprises a ceramic reinforced phase and the titanium-based alloy; the ceramic reinforced phase is one or more of TiB, TiC, Ti5Si3, WC, SiC and ZrB, and the titanium-based alloy comprises the following components in parts by weight: 5-20% of Al, 10-40% of Nb, 0.5-5% of RE and the balance of Ti; rE is one or more of La, Ce, Pr, Nd, Er, Yb and Dy; the preparation method comprises the steps of raw material mixing, primary cold press molding, secondary cold press molding, sintering and machining. Compared with the prior art, the shaped charge liner provided by the invention can realize the damage effects of large-size trepanning and high penetration depth on hard targets such as rocks, concrete and the like.

The invention discloses a titanium-based composite wear-resistant coating, which is formed by the following method: placing cladding material powder on the surface of a titanium-based alloy, and cladding the cladding material on the surface of the titanium-based alloy through laser in a nitrogen atmosphere to form the titanium-based composite wear-resistant coating, wherein the cladding material is composed of titanium alloy powder and copper powder, and the components of the cladding material are the same as those of titanium-based alloy; according to the mass percentage, the using amount of the copper powder is 3-9 wt%, and the balance is the titanium alloy powder. The crack tendency is reduced through the high thermal conductivity of copper, the compactness of the coating is improved, and meanwhile, the composite coating is endowed with higher wear resistance by utilizing the high-strength and high-hardness characteristics of the TiN phase. The method is suitable for ocean engineering material surface treatment, and the wear resistance and the service life of the workpiece are remarkably improved.

This invention belongs to the field of titanium-based alloy smelting, and relates to a smelting method and system for large single-weight titanium-based alloy ingots for medical devices. The smelting method includes the following steps: sponge titanium refining: sponge titanium is smelted in a vacuum electron beam cold bed to obtain pure titanium ingots, which are then cut into titanium blocks of a predetermined size; vacuum solidification melting: metal blocks of the predetermined size are mixed with the titanium blocks, and after vacuum solidification melting, they are cast into ingots, wherein the metal blocks are nickel blocks, niobium blocks, molybdenum blocks, or zirconium blocks; three-stage vacuum consumable melting: the vacuum solidified ingot is used as an electrode, and three vacuum consumable melting processes are performed sequentially with a titanium-based auxiliary electrode of the same composition. After each melting process, the ingot is peeled and the riser end is sawn off to obtain 1~1.5t titanium-based alloy ingots. This invention aims to successfully solve the problem of controlling the compositional uniformity of large single-weight titanium-nickel alloy ingots by combining electron beam cold bed smelting, vacuum solidification melting, and vacuum consumable melting.

A process for bonding an elastomer multilayer with integrated heating system and a thermosetting elastomer surface layer to at least one of the surfaces of a composite and / or titanium-based alloy substrate by an epoxy adhesive film having a curing temperature enabling complete crosslinking, of less than or equal to 126° C.

The application discloses a dual-state structure strain glass nickel-titanium base alloy and a preparation method and application thereof. The microstructure of the nickel-titanium base alloy presents a dual-state structure, the dual-state structure comprises a NiTi-B2 matrix and a second phase, the second phase comprises a primary reticular second phase and a super-fine eutectic lamella alternated with the NiTi-B2 matrix; the NiTi-B2 matrix and the second phase are a coherent or semi-coherent interface, can produce a strong fluctuating lattice stress field, the fluctuating lattice stress field can effectively inhibit a long-range martensitic phase transition, and can induce a strain glass transition. The core process of the preparation method is that the super-fine micro dual-state structure is generated in-situ by rapid solidification during a laser powder bed fusion process of a eutectic nickel-titanium base alloy. The process flow of the application is extremely simple, energy consumption is low, near-net forming of a strain glass alloy complex component can be realized, and the application has a wide industrial application prospect.

The invention discloses a fine grain heterogeneous titanium alloy material with a composite strengthening effect and a preparation method, and belongs to the field of high-toughness titanium-based composites.The preparation method comprises the steps that a prepared raw material added with large-particle LaB6 is smelted into a cast ingot through vacuum induction smelting; the cast ingot is subjected to hot rolling after being homogenized, and a target titanium alloy plate is obtained; according to the obtained titanium-based alloy, under the condition that plasticity is not sacrificed, the longitudinal tensile yield strength is improved to 870 MPa, the tensile strength is improved to 1050 MPa, and the ductility can reach 24%; the transverse tensile yield strength is equivalent to the tensile strength. According to the method, smelting and thermal machining are cooperatively controlled, LaB6 particles of 1-5 mm are directly introduced into the titanium-based alloy in a smelting mode to serve as a reinforcing phase raw material, so that TiB whiskers and La2O3 particles are generated in situ in the smelting process of LaB6 to refine crystal grains, a heterogeneous structure is formed through thermal machining, the good plasticity of the titanium alloy is kept, and meanwhile the strength of the titanium alloy is improved. And the yield strength and the tensile strength are obviously improved.

The invention relates to a method for producing an electrically conductive contact layer on an oxidation-loaded component, in which a component comprising a titanium-based alloy (27), which comprises at least one noble metal in a titanium matrix (33) as an alloy element, is provided. An etching agent is applied to a surface (35) of the component, material of the titanium matrix (33) being selectively removed. As a result, material of the alloy element is exposed such that an electrically conductive contact layer (29) comprising the noble metal is formed close to the surface. The contact layer (29) can optionally be configured as a porous layer having a porosity that can be adjusted by means of the etching process. The method can be used to produce a contact layer on oxidation-loaded components of an electrochemical cell, such as components of an electrolysis cell (1) or a fuel cell, in particular a bipolar plate (21a, 21b) or a gas diffusion layer (11a, 11b) having a titanium-based alloy (27).

The invention relates to a method for manufacturing a turbine compressor blade, comprising the following steps: - mounting a primary pin (26) in a primary bore (20) of a core and a secondary pin made of a titanium-based alloy in a secondary bore of the core, the primary pin comprising a material other than the titanium-based alloy, the primary bore forming at least one polygon, - forming a stack (2) consisting of an upper skin (4), the core (14) and a lower skin (6), - pressing the stack; - removing the primary pin (26) from the primary bore (20); - removing the secondary pin from the secondary bore; and - extracting the core (14) from the stack.