53 results about "Beta titanium alloy" patented technology

The invention provides a near-beta titanium alloy multi-performance prediction method based on physical information driving, and relates to the technical field of material informatics. Retrieving related literatures of the near-beta titanium alloy, and establishing an original data set; converting components and process features in the data set, embedding element physical attributes and phase change dynamics into feature engineering, performing data preprocessing and standardization, and dividing a test set and a training set by using stratified sampling; performing parameter tuning on the XGBoost model by adopting an Optuna hyper-parameter optimization framework in combination with five-fold cross validation, training and verifying the model by using a training set and a test set, and constructing a regression prediction machine learning model based on physical information driving; and inputting the physical characteristic parameters of the new material components into the optimized learning model for prediction, and outputting prediction results of the tensile strength and the ductility. The multi-objective performance is collaboratively optimized through physical characteristics, process parameter extrapolation is supported, and a high-precision and low-data-dependence solution is provided for near-beta titanium alloy design.

The invention discloses a preparation method of a heterostructure high-performance metastable beta titanium alloy capable of inducing a deformation mechanism in a multilevel and sequential mode, and belongs to the technical field of metal materials. The method comprises the following steps: firstly, carrying out hot rolling in a beta single-phase region to prepare a blank and crushing coarse grains; substructures such as twin crystals and martensite are introduced through cold rolling; and through short-time annealing in a beta single-phase region, a multi-stage heterogeneous lamellar structure composed of thick equiaxed crystal grains, deformation recovery crystal grains and fine recrystallized crystal grains in an alternating manner is successfully constructed. The characteristic that twin crystals and martensite induce different stresses under different grain sizes is utilized, during deformation, thick equiaxed grains firstly start a deformation mechanism, and then fine recrystallized grains are activated; and in the later period of plastic deformation, the interior of the primary deformation strip further triggers a secondary deformation mechanism. The unique behavior of'grading-time sequence 'activation of a multi-deformation mechanism along with the increase of the dependent variable enables the metastable beta titanium alloy to keep excellent plasticity, and meanwhile, the work hardening rate is remarkably improved.

The invention discloses a preparation method of a high-toughness beta titanium alloy wire. The preparation method comprises the following steps: providing a beta titanium alloy coiled wire; the coiled wire is subjected to multi-pass roller die hot drawing, and a first middle wire is obtained; performing eye mold hot drawing, sizing and rounding on the first middle wire rod to obtain a second middle wire rod; carrying out on-line short-time solution treatment on the second intermediate wire rod and cooling the second intermediate wire rod; performing eye mold hot drawing on the wire rod subjected to solution treatment to obtain a third middle wire rod; and the third middle wire rod is subjected to eye mold cold drawing, and the beta titanium alloy wire rod of the final specification is obtained. According to the preparation method of the high-toughness beta titanium alloy wire rod, the problems that crystal grains are coarse and large due to repeated solid solution of titanium alloy, sufficient precipitation behaviors cannot be obtained due to direct solid solution, the solid solution cold tensile strength is too high, the plasticity is low and cold plastic forming is difficult to achieve due to sufficient large deformation and cold deformation after solid solution, and the contradiction between the processing technology and the material performance is solved.

The invention relates to the field of high-strength titanium alloy preparation, in particular to a double-phase competition-based beta titanium alloy fine grain forging stock preparation method which comprises the following steps: selecting alloy components; the alloy is a metastable beta titanium alloy with the molybdenum equivalent of 13-20 or a near beta titanium alloy with the molybdenum equivalent of 10-13, the alloy is subjected to cogging forging and heat treatment before low-temperature forging, heat preservation is conducted at the temperature 100-150 DEG C above the beta phase transformation point temperature of the alloy, then 50% extrusion deformation is conducted in the X / Y / Z directions of a blank at the deformation speed of 3 mm / s, and finally the appearance of the blank is trimmed; the alloy is subjected to low-temperature forging, the low-temperature forging temperature is 200-350 DEG C below the beta phase transition temperature of the alloy, and the deformation rate during forging is 2 mm / s. And high-temperature short-time annealing is carried out, wherein the annealing temperature is 50-100 DEG C higher than the beta transformation temperature. According to the method, the problems that the grain size of the beta titanium alloy prepared by combining traditional forging in a high-temperature field with a long solid solution heat treatment mode is difficult to regulate and control, and the grain size distribution uniformity is poor are solved.

The application relates to the technical field of titanium alloy and discloses a titanium alloy based on laser powder bed melting and a preparation method thereof, the titanium alloy comprises the following elements in percentage by weight: 85-93% of titanium, 4-6% of molybdenum, 2-4% of iron, 1-4% of tin, and inevitable impurities as the balance; the forming state organization of the titanium alloy prepared through laser powder bed melting technology is composed of metastable beta phase and fine and dispersed nanometer omega phase, and the size of the nanometer omega phase is 3-6 nm. The titanium alloy of the application has super-high strength and good plasticity, does not need a subsequent heat treatment process, and realizes low-cost, high-performance and short-process preparation of metastable beta titanium alloy.

The invention discloses a method for electron beam fuse additive manufacturing of a beta titanium alloy component, and belongs to the technical field of additive manufacturing. The invention aims to solve the problems of long period, low efficiency, low utilization rate, serious oxidation, obvious beta spots and poor obdurability of beta titanium alloy preparation in the prior art. The method comprises the following steps: pre-treating a printing wire and a substrate; the method comprises the following steps: establishing a three-dimensional solid model based on a target beta titanium alloy component, slicing the three-dimensional solid model to generate multi-layer two-dimensional slicing data, importing the slicing data into electron beam fuse additive manufacturing equipment, and setting a scanning path, preheating parameters and printing process parameters; and the equipment is started and vacuumized, beta titanium alloy printing is conducted according to set printing parameters and programs, all layers are completed, and the beta titanium alloy component is manufactured. The beta titanium alloy component prepared through the method is high in density, and a reliable technical approach is provided for preparation of high-performance beta titanium alloy components in the fields of aerospace and the like.

The application belongs to the technical field of metal additive manufacturing, and particularly relates to a method for preparing a metastable beta titanium alloy with uniform mechanical performance by additive manufacturing. The Ti-7Mo-3Nb-3Cr-3Al alloy is used in additive manufacturing for the first time, and by selecting a lower laser power and a higher scanning speed, heat accumulation during forming is controlled in a manner of canceling the substrate preheating treatment on the basis of a lower input energy density, the adverse effects brought by thermal cycles during forming are weakened, the microstructure and phase structure evolution of the material are affected, the precipitation and non-uniform distribution of the omega phase / alpha phase are effectively inhibited, and uniform tensile performance of the printed alloy is realized.

The application discloses a high-strength alpha+beta titanium alloy suitable for 500 DEG C and a preparation method thereof, which comprises Ti, Al, V, Mo, Nb, Zr and other impurity elements, and the mass percentage (wt.%) of alloy components is as follows: Al is 6.2-7.2, V is 1.5-2.5, Mo is 1.5-2.5, Nb is 0.5-1.5, Zr is 13.5-14.5, Mn is less than or equal to 0.02, C is less than or equal to 0.02, Ni is less than or equal to 0.01, Si is less than or equal to 0.20, Sn is less than or equal to 0.20, Cr is less than or equal to 0.04, O is less than or equal to 0.02, P is less than or equal to 0.01, S is less than or equal to 0.01, N is less than or equal to 0.006, and Ti is the balance. p The application realizes that the alloy has a specific microstructure of a bimodal structure composed of primary alpha phase and transformed beta phase by alloy design, the primary equiaxial alpha s The content of the secondary alpha s The width of the secondary alpha s The alpha T / beta The application forms an alpha The application has excellent thermal stability and thermal strength, and no harmful phase is generated after aging at 550 DEG C. Meanwhile, the alloy has good mechanical properties and excellent processing deformation capacity, the yield strength at room temperature is more than 1250 MPa, the tensile strength at room temperature is more than 1300 MPa, the plasticity at room temperature is more than 7%, and the tensile strength at 500 DEG C is more than 600 MPa, so the application discloses a new high-strength titanium alloy suitable for 500 DEG C.

The invention discloses a method for regulating and controlling as-cast high-toughness beta titanium alloy by introducing a triangular alpha phase of an alpha / beta coherent interface, and relates to the field of complex titanium alloy casting preparation. The method aims at solving the problems that an existing complex titanium alloy casting is low in strength and toughness, and the obdurability cannot be improved through plastic deformation. According to the method, the triangular alpha phase with the alpha / beta coherent interface is introduced into the titanium alloy by regulating and controlling the components of the beta titanium alloy and carrying out proper heat treatment, so that the purpose of coordinating the strength and toughness matching of the alloy is achieved. It is worthy of noting that the alpha phase of the triangle of the alpha / beta coherent interface is generated in the heat treatment process, and the fluidity of the titanium alloy in the casting and mold filling process of a casting cannot be affected. The tensile strength of the titanium alloy in the designed component range ranges from 1100 MPa to 1350 MPa, the toughness ranges from 50 MPa.m < 1 / 2 > to 77 MPa.m < 1 / 2 >, and the performance requirements of various complex titanium alloy structural parts can be met. The method is applied to the field of complex titanium alloy casting preparation.

The application belongs to the field of novel beta titanium alloy hot working, and particularly relates to a forging method for improving anisotropy and strength-toughness matching of super-high strength and toughness beta titanium alloy. The method comprises the following steps: homogenizing a rod, wherein the heating temperature is (Tbeta+30)~(Tbeta+100) DEG C, and high-temperature homogenization treatment is performed for 15-30 hours; high-temperature reversing upsetting and drawing forging, the heating temperature of each fire is reduced by 20-50 DEG C in turn, and the range of the heating temperature is (Tbeta+30)~(Tbeta+100) DEG C; blank forging to obtain a blank; and isothermal forging on the blank to obtain a forged piece. The beta titanium alloy forging process specification is formulated, the problem of anisotropy of TB17 titanium alloy is greatly improved, and the strength and plasticity and toughness are well matched.

This invention provides a biocompatible β This invention relates to a method for composite modification of titanium alloy surfaces, belonging to the technical field of alloy modification methods. The invention includes applications in medical... β This invention involves introducing bioactive particles onto the surface of a titanium alloy substrate, performing friction stir processing (FSP) on the substrate to introduce bioactive particles and construct a gradient grain structure, and then subjecting the FSP-treated substrate to compressed plasma flow (CPF) treatment to achieve uniform distribution of bioactive particles and construct a topology with an average surface roughness of 3-6 μm suitable for cell growth. The invention precisely controls the amount of bioactive particles introduced and constructs a gradient grain structure through friction stir processing (FSP); simultaneously, compressed plasma flow (CPF) technology achieves uniform distribution of bioactive particles and an ideal surface roughness of 3-6 μm on the titanium alloy surface. Ultimately, this significantly improves the cell adhesion, proliferation capacity, and osteogenic properties of the material surface, solving the technical problem of low integration efficiency of traditional titanium alloy implants with human bone tissue.

The application provides a near-beta titanium alloy, which comprises the following components in percentage of raw material mass: Al: 2.5-3.5 %, V: 7-9 %, Cr: 0.8-1.8 %, Mo: 0.7-1.7 %, Fe: 0.5-1.0 %, and the balance of Ti and inevitable impurities. The new high-strength and high-toughness near-beta titanium alloy can reduce the decrease of plasticity and toughness when improving the strength index, fundamentally reduces the difficulty of alloy smelting control, has the advantages of high specific strength, good fracture toughness, good hardenability and good controllability of composition, and can be used for manufacturing large equipment in the fields of aerospace, weapons, petrochemical industry and the like.

The application provides a light-weight super-high-strength cast beta titanium alloy material and a preparation method thereof, and belongs to the technical field of titanium alloy materials. Light-weight elements Al, Zr and V are added as alloy elements, the alloy composition is Ti 50%~71%, Al 7%~12.5%, V 11%~15% and Zr 11%~16% in terms of atomic ratio, and a uniform single-phase beta titanium alloy is prepared. Through the interaction between the alloy elements, the solid solubility in the titanium matrix is improved, the beta phase region is expanded, the target beta titanium alloy does not have brittle phases such as phase separation and intermetallic compounds, the solid solution strengthening effect is maximized, and the chemical ordering is promoted, so that the strength of the alloy is enhanced and the plasticity is improved. In addition, the application does not need complex thermal mechanical processing regulation and control such as forging, rolling or solid solution aging, and the high-strength and high-toughness matching of yield strength >=1000MPa and elongation after fracture >=12% can be realized in the as-cast state.

The invention provides a preparation method of an ultrahigh-strength plastic titanium alloy with the yield strength larger than 1500 MPa, and belongs to the technical field of metal material additive manufacturing. In order to solve the problems of coarse grains, serious anisotropy and unmatched strength and plasticity of the existing titanium alloy manufactured by laser additive manufacturing, the invention provides a new strategy for constructing an intragranular nano hierarchical structure by combining eutectoid element refined grains with three-stage heat treatment. The method comprises the following steps: preparing raw material composite powder; fine-grain beta titanium alloy is manufactured through laser additive manufacturing; and carrying out three-stage heat treatment to prepare the ultrahigh-strength and ultrahigh-plasticity nanometer graded lamellar structure titanium alloy Ti1600. The room-temperature yield strength gt of the novel titanium alloy Ti1600 with the nano-grade lamellar structure prepared by the preparation method disclosed by the invention is high; the tensile strength is greater than 1600 MPa, and the ductility is gt; and a new way is provided for design and preparation of the ultrahigh-strength plastic titanium alloy and near-net forming of complex components of the ultrahigh-strength plastic titanium alloy, which are urgently needed in the fields of aerospace, automobile manufacturing, consumer electronics and the like.

The application discloses a Ti-V-Zr-Cr-Al system ultrahigh-strength near-beta titanium alloy and a preparation method thereof, and belongs to the technical field of titanium alloy materials. The ultrahigh-strength near-beta titanium alloy contains 5.0-5.5% of Al, 11.0-11.5% of V, 2.5-3.0% of Cr, 4.5-5.0% of Zr, and the balance of Ti and inevitable impurity elements according to mass percentage. In the preparation process, firstly, the alloy ingot is subjected to open forging, and then is subjected to upsetting and drawing forging after being cooled to a phase transition point, so that a certain amount of primary alpha phase is formed in the alloy and is uniformly distributed in beta grains, thereby obtaining a titanium alloy forging blank; and then, the titanium alloy forging blank is sequentially subjected to solid solution treatment and aging treatment, thereby obtaining a near-beta ultrahigh-strength titanium alloy with a duplex structure. The titanium alloy has a tensile strength of more than 1800 MPa, a yield strength of 1780 MPa, a fracture elongation of more than 3.2%, and a uniform elongation of more than 2.8%. In particular, the tensile strength reaches 1800 MPa, and the titanium alloy can meet the requirements of the fields of aerospace, energy industry and the like, and has high use value and popularization value.

The present invention discloses a metastable β-titanium alloy thin strip and a preparation method thereof. The method comprises: 1. subjecting a β-titanium alloy ingot to four-pass forging to obtain a forged slab; 2. subjecting the forged slab to three-pass hot rolling to obtain a hot-rolled plate; 3. annealing the hot-rolled plate; 4. subjecting the annealed hot-rolled plate to multiple-pass strip tension cold rolling to obtain a cold-rolled strip; and 5. solution annealing the cold-rolled strip to obtain the metastable β-titanium alloy thin strip. By adjusting the forging process, temperature, and deformation, optimizing the hot-rolling temperature, cold-rolling deformation, and solution treatment regime, the present invention effectively suppresses the precipitation of the ω brittle phase, improves cold forming and cold working capabilities, and produces a metastable β-titanium alloy thin strip with uniform thickness, good surface quality, stable performance, and excellent plasticity, meeting the application needs of various fields.

The application discloses a method for electron beam fuse additive manufacturing of beta titanium alloy components, and belongs to the technical field of additive manufacturing. The application aims to solve the problems of long preparation period, low efficiency, low utilization rate, serious oxidation, significant beta spot and poor strength and toughness of the prior art. The method comprises the following steps: pretreating the printing wire and the substrate; establishing a three-dimensional entity model based on the target beta titanium alloy component, performing slice processing on the three-dimensional entity model to generate multi-layer two-dimensional slice data, and then importing the slice data into an electron beam fuse additive manufacturing equipment, and setting a scanning path, preheating parameters and printing process parameters; starting the equipment and performing vacuumization, printing the beta titanium alloy according to the set printing parameters and procedures, completing all layers, and obtaining the beta titanium alloy component. The beta titanium alloy component prepared by the application has high density, and provides a reliable technical approach for the preparation of high-performance beta titanium alloy components in the fields of aviation and aerospace.

The application discloses a kind of preparation methods of laser forming high-strength titanium alloy based on mixed alloy powder, to solve the problem such as high dependence of high-strength titanium alloy manufacturing on custom powder, poor strength and plasticity matching.The application determines metastable beta titanium alloy and duplex titanium alloy powder ratio based on multidimensional theory; by laser forming, the volume energy density is controlled to be 50-90J / mm 3 In-situ alloying is realized; by two-stage heat treatment, solid solution at 780-900 DEG C and aging at 400-600 DEG C, the heterogeneous structure of large-size primary alpha phase cluster and fine secondary alpha phase interweaving is constructed.The application significantly reduces the preparation cost, and realizes the high coordination of strength and plasticity.

The application discloses a method for preparing full beta phase fine grain / superfine grain titanium alloy based on alpha" martensite reverse phase change, and is characterized in that the method comprises the following steps: firstly, pre-deforming titanium alloy is obtained by rolling bulk metastable beta titanium alloy at room temperature; secondly, short-time annealing heat treatment is carried out; thirdly, secondary rolling is carried out at room temperature; and fourthly, fine grain / superfine grain titanium alloy is obtained by secondary short-time annealing heat treatment. In the application, micron-level alpha" martensite laths are introduced by pre-deformation, reverse phase change of alpha" to beta is realized by combining with primary short-time annealing heat treatment, the size of beta phase grains is reduced, then nanometer-level alpha" martensite phase is introduced by secondary rolling, the size of beta phase grains is further reduced by taking the alpha" martensite phase as the nucleation core of beta grain recrystallization, and finally, fine grain / superfine grain titanium alloy is obtained by combining with secondary short-time annealing heat treatment. The titanium alloy has beta single-phase organization, the minimum grain size is submicron, the superelasticity performance of the titanium alloy is improved, and the titanium alloy is suitable for metastable alloy with deformation martensite phase change.

This disclosure provides a method for controlling the multi-level α microstructure of metastable β titanium alloys, including the following steps: Step 1: Metastable β titanium alloy at its β phase transformation point T β Solution treatment within ±50℃; Step 2: Perform multi-pass rolling deformation on the billet obtained in Step 1, with a single-pass deformation amount of 10-30%, and hold at the rolling temperature for 1-10 minutes after every 1-2 passes until the total alloy reduction reaches 70%-95%, then cool to room temperature; Step 3: The billet obtained in Step 2 is subjected to T β -40℃~T β Anneal for 2–120 minutes within the temperature range, then cool to room temperature; or first anneal at T β -80℃~T β Annealing at -40℃ for 20–120 min, then at T β -40℃~T β Annealing for 2–120 minutes within the temperature range, then cooling to room temperature; Step 4: The billet obtained in Step 3 is annealed at T... β -350℃~T β Multi-level α-structures were obtained after aging for 4–12 hours within a temperature range of -210℃. This disclosure enables coupling of primary α-structures. p Secondary α phases of different sizes and spacings s This phase allows metastable β-titanium alloys to possess high strength while retaining a certain degree of plasticity.

The application provides a corrosion-resistant titanium alloy β Titanium alloy and surface modification method thereof, belong to alloy modification technical field.The application includes in β A layer of nano Zn particles is laid on the surface of titanium alloy base material, a gradient structure bottom layer containing Zn is constructed by adopting a friction stir processing technology, the treated base material is handled by compression plasma flow, and a dense smooth surface layer combined with the gradient structure bottom layer containing Zn is constructed.The application constructs a gradient structure bottom layer containing Zn by adopting a friction stir processing technology, handles by compression plasma flow, constructs a dense smooth surface layer combined with the gradient structure bottom layer containing Zn, and is characterized by the following advantages: β The titanium alloy surface forms a composite modified layer with longitudinal gradient structure and low roughness surface layer.The corrosion resistance of the titanium alloy in a simulated physiological environment is significantly improved β The titanium alloy in a simulated physiological environment is significantly improved, and the process is physical modification without harmful reagents, and is suitable for the mechanical matching and biocompatibility requirements of bone implants.

The application relates to the technical field of titanium alloys, in particular to a Ti-Al-V-Mo-Cr-Zr-Nb metastable beta titanium alloy and a preparation method thereof. The Ti-Al-V-Mo-Cr-Zr-Nb metastable beta titanium alloy comprises 3.8-4.6% of aluminum in terms of weight percentage, 5.7-6.5% of vanadium in terms of weight percentage, 4.2-5.2% of molybdenum in terms of weight percentage, 3.0-3.7% of chromium in terms of weight percentage, 1.0-2.2% of zirconium in terms of weight percentage, <=1.0% of niobium in terms of weight percentage, <=0.05% of carbon in terms of weight percentage, <=0.05% of nitrogen in terms of weight percentage, <=0.015% of hydrogen in terms of weight percentage, <=0.15% of oxygen in terms of weight percentage, and the balance is titanium and impurity elements. The purpose of the Ti-Al-V-Mo-Cr-Zr-Nb metastable beta titanium alloy and the preparation method thereof is to solve the problem that the comprehensive performance such as strength, plasticity and toughness of the current super-high-strength titanium alloy is difficult to realize good matching.

This invention relates to the field of metal material testing technology, and particularly to a method for rapidly detecting the original β-grain size of near-β titanium alloys. The method includes the following steps: S1. A low-magnification sheet of a titanium alloy bar or forging is sequentially heated, held at a certain temperature, and cooled to obtain a sample to be tested; S2. The sample to be tested is polished, the surface is polished twice with a mixed acid, rinsed with anhydrous ethanol, and dried to obtain a treated sample; S3. The β-phase grain size on the surface of the treated sample is observed. The heat treatment method used in this invention can ensure that the original β-phase morphology does not change during heat treatment. After surface etching, it allows for direct observation and statistical analysis of the original β-grain size of near-β titanium alloys, which is more convenient for the formulation and optimization of actual titanium alloy production processes.

The application discloses a kind of high-strength plastic β titanium alloy strip and whole-process preparation method, the β titanium alloy strip is composed of the following mass percentage components: Cr 7.7%~8.3%, Mo 4.9%~5.5%, V 4.9%~5.5%, Al 2.7%~3.3%, Fe≤0.20%, C≤0.03%, N≤0.02%, H≤0.010%, O≤0.10%, and the rest is Ti;The preparation method comprises: one, forging;Two, hot rolling;Three, cold rolling;Four, heat treatment.The β titanium alloy strip and whole-process preparation method of the application are overall planning from component design to final heat treatment whole-process procedure, improve production efficiency, shorten preparation time, and the β titanium alloy strip solid solution state microstructure is equiaxed β fine grain structure, strength-plasticity matching is high, horizontal longitudinal organization performance is uniform, with excellent comprehensive mechanical properties, applicable to metal processing field.

This invention provides a method for regulating the microstructure and strength-plasticity matching of metastable β-titanium alloys based on the synergistic mechanism of precipitate growth and dissolution. Metastable β-titanium alloys with a basketweave microstructure are heat-treated using a temperature-controlled sample delivery method, held at a two-phase temperature, and then air-cooled. This invention, through research on the regulation of the size characteristics, phase structure, and phase density of the basketweave α phase at grain boundaries and within grains, simplifies the process while achieving synergistic optimization of strength and plasticity. This addresses a pressing technical bottleneck in the current field of metastable β-titanium alloys, achieving an excellent balance between strength and plasticity in the basketweave microstructure of metastable β-titanium alloys by optimizing heat treatment process parameters.

The application discloses a low-cost short-process high-strength high-plasticity metastable beta titanium alloy sheet and a preparation method thereof, and relates to the technical field of titanium alloy material processing and heat treatment. The heat treatment method is as follows: a metastable beta titanium alloy cold-rolled sheet is subjected to short-time solid solution treatment at 30 DEG C to 60 DEG C below a beta transformation point, a small amount of primary alpha phase and cold-rolled beta substructure are reserved, then short-time low-temperature omega phase aging treatment is carried out, beta substructure and Zr / Sn are used to induce uniform nucleation of the omega phase and limit the coarsening of the omega phase, and a dual-phase structure containing nano omega phase is obtained. Through composition and process synergy, the application solves the problem of traditional omega phase embrittlement, and realizes excellent matching of high strength and high plasticity. The yield strength of the sheet obtained after heat treatment is greater than or equal to 1050 MPa, the elongation after fracture is greater than or equal to 30%, and the strength-plasticity product is greater than or equal to 30 GPa%. The method has simple procedures, low temperature and short time, low raw material and production cost, and compact process, and is suitable for industrialized batch production.

The invention relates to the technical field of titanium alloy material component design, in particular to a component design method of a light high-toughness beta titanium alloy material, light elements Al, Zr, V and Y are added, an initial beta titanium alloy is designed to be Ti50-60 (AlZrVY) 40-50, brittle intermetallic compounds formed by element distribution are eliminated, and a high-strength high-toughness beta titanium alloy material is obtained. And the target beta titanium alloy component composition capable of forming the uniform single phase is accurately locked by repeating the steps for iterative verification. Through the synergistic effect of alloy elements, the solid solubility of the alloy elements in a titanium matrix is improved, a beta phase region is expanded, the obtained target beta titanium alloy does not have phase separation, intermetallic compounds and other brittle phases, and plasticity is improved while the alloy strength is enhanced.

This invention discloses a method for preparing TB15 metastable β titanium alloy, belonging to the field of titanium alloy heat treatment technology. The method involves performing a two-phase region solution heat treatment on TB15 titanium alloy to obtain a solution-treated titanium alloy containing primary equiaxed αp phases. After holding at this temperature, no cooling treatment is performed. The solution-treated titanium alloy is then directly subjected to aging treatment without cooling at a temperature of 550℃ to 570℃ for 4 to 6 hours, allowing the acicular secondary αs phase to disperse and precipitate before cooling to room temperature. This invention eliminates the traditional water-cooling process after solution treatment, utilizing a transfer heat treatment path of direct heated aging after solution treatment. This avoids the formation of Widmanstätten structure at grain boundaries, effectively improving plasticity and fracture toughness while maintaining high alloy strength. It is suitable for the preparation of titanium alloy structural parts in aerospace, automotive, and other industrial fields.

The present application relates to the field of wear-resistant and corrosion-resistant high-speed rotating screen, in particular to a wear-resistant and corrosion-resistant high-strength titanium alloy slit screen and a preparation method thereof. First, high-strength beta titanium alloy plate material with excellent cold workability and welding performance is selected as raw material, and the screen meeting the size requirements is prepared through laser cutting, cold roll forming and laser welding, and then aging treatment is carried out to meet the performance requirements. Then, the rough inner wall of the laser cutting gap is treated by electrolytic polishing process, so that the roughness is within 0.8 μm. Subsequently, the plate material with slits is rolled into the designed screen shape by using a plate rolling machine, and the both sides are welded by laser, thereby completing the manufacture of the screen shape. Finally, the milling machine is used to process the outside of the screen to have a gradient step profile, so as to reduce the filtrate passing path. The slit screen prepared by the method has high structural strength and rigidity, small running noise, excellent corrosion resistance and wear resistance, and can meet the solid-liquid screening requirements in harsh environment.

An alpha-beta titanium alloy comprising (by weight): 5.0-8.0 % aluminium, 1.0-5.5 % vanadium, 0.75-2.5 5 molybdenum, optionally 0.2-1.0 % iron, 0.1-0.2 % silicon and 0.25 % or less oxygen, with the ba