44results about How to "Improve fatigue performance" patented technology

The present invention provides a bio-based sustainable tire tread rubber composition and a preparation method thereof, and relates to the field of rubber tire manufacturing, the bio-based sustainable tire tread rubber composition is prepared from the following raw materials by weight: 10-50 phr of natural rubber, 30-90 phr of solution polymerized styrene butadiene rubber, 0-15 phr of eucommia ulmoides rubber, 30-60 phr of carbon black, 5-20 phr of a lignin reinforcing filler, 0-3 phr of a lignin-based anti-aging agent, and 1-6 phr of a conventional anti-aging agent, the formula comprises the following components in percentage by weight: 3-7 phr of zinc oxide, 0.2-2 phr of stearic acid, 1-3 phr of an accelerant and 1-4 phr of a vulcanizing agent. According to the prepared rubber material, the lignin reinforcing filler and the lignin-based anti-aging agent are used for replacing traditional carbon black filler and petroleum-based anti-aging agent products, the use amount of petroleum-based chemicals in a formula system is reduced, environmental pollution is reduced, and carbon emission is reduced; the adopted preparation process can effectively promote the dispersion of the lignin filler; in the prepared rubber composition, the eucommia ulmoides rubber is applied, so that the mechanical property and the fatigue property of vulcanized rubber can be effectively improved.

The invention discloses a gradient pore structure geopolymer asphalt mixture warm mixing agent which is composed of the following components in parts by weight: 65-85 parts of regenerated micro powder, 15-35 parts of rice hull ash, 15-20 parts of a sodium silicate solution, 5-10 parts of sodium hydroxide and 10-20 parts of deionized water. The invention also discloses a preparation method of the geopolymer asphalt mixture warm mixing agent. The geopolymer asphalt mixture warm-mixing agent has a gradient pore structure and has no closed pores or semi-closed pores, so that the water carrying capacity in the geopolymer asphalt mixture warm-mixing agent can be greatly improved, and the pore structure is arranged in a gradient manner (gradually released from large pores to small pores), so that the water release period of the warm-mixing agent can be effectively prolonged, and meanwhile, the water release rate can be uniform; compared with a hot-mixed asphalt mixture, the geopolymer asphalt warm-mixing agent with the gradient pore structure has the advantages that the mixing temperature of the asphalt mixture can be remarkably reduced, and meanwhile, the high and low temperature performance, the water damage resistance and the fatigue resistance of the asphalt mixture can be improved.

The invention relates to the technical field of structural damping devices, and particularly discloses a prestressed shape memory alloy damper which comprises a yield type assembly and two viscous type assemblies, and the two viscous type assemblies are fixedly connected to the two sides of the yield type assembly; the yield type assembly comprises an energy dissipation core plate, a plurality of prestressed inclined struts, a first supporting plate, a second supporting plate, an upper connecting plate, a lower connecting plate, a pre-tightening bolt, a first base plate, an angle plate, a restraining plate and a second base plate, and the prestressed inclined struts are fixedly connected to the front side and the rear side of the energy dissipation core plate correspondingly. According to the damper, the defect that the shape memory alloy material is high in yield strength and cannot rapidly enter energy consumption prior to a main body structure is overcome by adopting a pre-tightening force mechanism, meanwhile, the advantages of high ductility and high fatigue of the shape memory alloy material are exerted, and the damper has the anti-seismic and shock-absorbing effect of multi-coordination energy consumption.

The invention discloses a lattice type wind power tower, which relates to the field of wind power generation engineering and comprises tower columns, diagonal web members and transverse web members. The tower columns are distributed at the corners and connected through the transverse web members and the diagonal web members. The arrangement form of a vertical face formed by the tower columns, the transverse web members and the diagonal web members is a'big-end-down 'oblique straight line type or variable slope type; the arrangement form of a plane formed by the tower columns and the transverse web members is triangular, square or polygonal, transverse partitions are arranged in the square or polygonal plane formed by the tower columns and the transverse web members, and the arrangement form of the transverse partitions is a brace type. The tower structure is hollowed out, the wind load is small, the hollowed-out part does not affect crop planting and the like, the coordination of the structure and the surrounding environment is better, and the space utilization rate is higher.

The invention discloses a light-weight rail wheel with good thermal mechanical performance, a wheel disk is of a wave-shaped structure, the outer side contour line and the inner side contour line of the wheel disk are respectively composed of a plurality of arc sections which are connected, the arc sections forming the outer side contour line comprise a first arc section, a fourth arc section, a sixth arc section, an eighth arc section and a tenth arc section, and the first arc section, the fourth arc section, the sixth arc section, the eighth arc section and the tenth arc section are connected. The arc sections forming the inner side contour line comprise the second arc section, the third arc section, the fifth arc section, the seventh arc section, the ninth arc section, the eleventh arc section and the twelfth arc section. The purpose of light weight of the wheel is effectively achieved by adjusting different arc radiuses and circle center positions, the radial strength of the radial plate is moderately reduced, the radial plate and the rim are more deformed in the diameter direction during braking thermal deformation, the axial deformation trend of the radial plate and the rim is reduced, and the service life of the wheel is prolonged. Therefore, the stress state of the wheel under the braking thermal load effect can be improved, and it is guaranteed that the wheel has good thermal mechanical performance and fatigue performance.

The invention provides a forming process of a high-strength corrosion-resistant magnesium alloy pipe, and belongs to the field of alloy materials. The magnesium alloy pipe comprises the following raw materials in percentage by mass: 3.0%-5.0% of Gd, 1.5%-3.0% of Y, 1.0%-3.0% of Al, 0.3%-0.8% of Zr, 0.05%-0.1% of Mn, less than or equal to 0.2% of Cu, less than or equal to 0.15% of Fe, 0.5%-0.8% of Zn and the balance of Mg, wherein the total amount of Gd, Y and Al is gt; the mass ratio of Gd to Y to Zr is (6.5-10): (3.5-6.8): 1, and the ratio of (Fe + Zn) / Cu is 4.5-5.3; the raw materials are mixed according to the proportion and then sequentially subjected to smelting, refining, casting, solid solution heat treatment, pipe extrusion, room-temperature rotary swaging, aging heat treatment and surface machining, and then the magnesium alloy pipe is obtained. The corrosion resistance and mechanical property of the magnesium alloy pipe are remarkably improved by optimizing alloy components and combining extrusion and room-temperature rotary swaging modes.

This application relates to a weathering steel, its preparation method, and its application, belonging to the field of steel preparation technology. The chemical composition of the steel includes C 0.030-0.050%; Si ≤0.10%; Mn 1.25-1.70%; P ≤0.020%; S ≤0.003%; Al 0.02-0.05%; Nb 0.010-0.030%; Ti 0.03-0.07%; Ni 0.02-0.05%; Cu 0.2-0.5%; Cr 0.8-1.5%; N ≤0.0040%; Ca 0.001-0.004%. It adopts a reasonable ratio of weathering-resistant elements such as copper, chromium, and nickel added on a low-carbon, low-silicon, and low-manganese basis. The combination of Cu and Cr can form a dense α-FeOOH oxide rust layer on the surface of the steel, preventing further corrosion of the steel matrix.

The utility model discloses an efficient installation structure of a photovoltaic assembly, which comprises a base surface and a photovoltaic packaging composite part laid on the base surface, the photovoltaic packaging composite part comprises a tensioning layer, and the base surface bears and / or is provided with a tensioning structure; wherein the tensioning layer is mounted and connected with the tensioning structure, and at least one group of acting force and counter-acting force in at least one opposite direction is formed on the tensioning layer through the tensioning structure, so that the tensioning layer is in a tensioned and flattened state on the base plane to realize an efficient mounting effect on the photovoltaic packaging composite part; according to the utility model, the on-site installation construction efficiency of the photovoltaic module is obviously improved, and the device is especially suitable for large-size photovoltaic modules so as to realize an efficient and convenient installation effect.

This invention belongs to the field of metal welding technology and relates to a heat treatment method for hypereutectoid rail steel after flash welding, comprising the following steps: post-weld cooling: the welded joint is allowed to cool naturally in air after flash welding; normalizing treatment: the welded joint is heated to a normalizing temperature above the austenitizing temperature and held at that temperature; controlled cooling: the temperature of the weld heat-affected zone of the welded joint is cooled from the normalizing temperature to the isothermal transformation temperature within the pearlite phase transformation temperature range at a first cooling rate, held at that temperature until the austenite undergoes pearlite transformation, and then the welded joint is cooled from the isothermal transformation temperature to below 200°C at a second cooling rate lower than the first cooling rate. The method of this invention can effectively eliminate the network cementite structure in the flash welding heat-affected zone, while avoiding the introduction of harmful structures such as martensite or bainite, ensuring that the microstructure of the weld heat-affected zone is pearlite with fine lamellar spacing.

The application discloses an environment-friendly rubber composite material and a preparation method and application thereof, and relates to the technical field of tire rubber materials.The environment-friendly rubber composite material comprises, in parts by mass, 100 parts of a rubber matrix, 10-60 parts of a bio-based filler, 0.5-10 parts of an interface modifier, 1-8 parts of a vulcanizing component and 0.5-5 parts of a crosslinking aid; wherein the rubber matrix comprises natural rubber and butadiene rubber; the bio-based filler comprises at least one of lignin, cellulose or a derivative thereof; the interface modifier comprises a compounded system of a silane coupling agent and a bio-based small molecule containing multiple functional groups; and the crosslinking aid comprises a borate compound and a low-molecular polymer containing a dynamic hydrogen bond structure.The application also provides a preparation method and application of the material.The application improves the proportion of the bio-based material, improves the long-term stability of the interface between the bio-based filler and the rubber matrix, reduces the interface damage accumulation and dynamic heat generation under the action of cyclic load, and improves the fatigue performance and comprehensive service performance of the rubber composite material.

The present invention provides an anodized aluminum alloy powder for laser additive manufacturing, which belongs to the technical field of aluminum alloys. The aluminum alloy powder includes the following components in mass percentage: Mg2‑5%, Mn0.2‑1.5%, Zr0.5‑1.5%, Cu0.05‑0.20%, Fe0.1‑0.2%, and the rest is Al. The aluminum alloy powder proposed by the present invention can be used for additive manufacturing, and can also be anodized. The surface oxide film of the obtained finished product is uniform and has good glossiness, which is beneficial to subsequent color plating. The hollow powder rate of the aluminum alloy powder provided by the present invention is low, which effectively reduces the probability of defects such as pores and cracks in the additive manufacturing metal parts, and improves the performance and life of the parts.

The invention relates to a sustained-release tablet containing coenzyme Q10 and a preparation method thereof, belonging to the field of biotechnology. The active ingredients of the sustained-release tablet include a coenzyme Q10 coating, a grass fruit kernel extract, a perilla seed extract and a gorgon rice extract; the coenzyme Q10 coating is a coating agent coated on the surface of coenzyme Q10 powder particles; the grass fruit kernel extract is obtained by sequentially hydrolyzing the grass fruit kernel with ficin, subtilisin and trypsin; the perilla seed extract is obtained by sequentially hydrolyzing the perilla seeds with pepsin, acid protease and bromelain; the gorgon rice extract is obtained by sequentially hydrolyzing the gorgon rice with papain, trypsin and bromelain. The grass fruit kernel extract, the perilla seed extract and the gorgon rice extract are used in combination with the coenzyme Q10 coating at the same time, and can play a good anti-oxidation, improve immunity, and improve fatigue effects, and are safe and efficient; the coenzyme Q10 coating has sustained release and good absorption regulation.

The application belongs to the technical field of metal matrix composite material preparation, and discloses a preparation method of an intracrystalline dispersed TiC and grain boundary network AlN particle configuration reinforced aluminum matrix composite material, which comprises four steps: firstly, a core-shell powder is prepared by depositing an AlN precursor on the surface of aluminum powder; a core double-shell composite powder is obtained by modifying TiC electrostatic adsorption; a low-temperature pulse pre-pressing protective surface film is prepared; and a multi-stage pulse sintering is performed to induce local micro-melting of the matrix, and the composite material with intracrystalline dispersed TiC and grain boundary enriched AlN is obtained by relying on solid-liquid interface separation. The method forms an AlN grain boundary network and TiC intracrystalline dispersion double-mode configuration through process control, the three-dimensional quasi-continuous AlN at the grain boundary can strongly pin the grain boundary and inhibit the grain growth, and the high-temperature strength and creep resistance of the material are greatly improved, the uniformly distributed nanometer TiC in the crystal can hinder the dislocation movement by the Orowan dislocation bypass mechanism, the room temperature strength and toughness are improved, and the two kinds of strengthening mechanisms work together to meet the use needs.

According to the composite material wallboard forming method, a wallboard structure comprises a skin and a plurality of stringers, the section of each stringer is in an inverted T shape, the stringers are connected to the inner surface of the skin, and the wallboard structure is decomposed into a plurality of assembly parts according to the theoretical appearance of the wallboard structure; the outer skin assembly part, the L-shaped assembly part and the semi-frame-shaped assembly part are respectively formed by paving composite material fiber prepreg; and according to the theoretical appearance of the wallboard structure, the assembly parts are pasted through adhesive films, hollow areas between the assembly parts are filled with foam cores, high-temperature co-curing is conducted in an autoclave, and the integrated composite wallboard structure is formed.

The invention discloses an arched steel structure fabricated retaining wall of a mobile crushing station, and belongs to the technical field of mine crushing stations. Comprising a foundation and a retaining wall frame which is inserted into the foundation and formed by E-shaped steel columns, H-shaped steel columns and cross-shaped steel columns, arched corrugated steel plates are connected to the frame to form a retaining wall body, and the arched corrugated steel plates have good circumferential rigidity, axial flexibility, deformation resistance and foundation adaptability and can meet the special requirements of unfavorable geology. Factory processing and on-site assembly are separately implemented, so that the construction period is greatly shortened; the construction is not influenced by temperature and environment, and the construction period is prolonged; large mechanical equipment is not needed for transportation and on-site splicing construction, only manual operation is needed for most splicing, construction is convenient and fast, operation is easy, and cost reduction and quality control are facilitated; the position of the fabricated retaining wall can be adjusted at any time along with movement of the working face of the crushing station, and the full-life-cycle investment cost of the crushing station is reduced.

The utility model discloses a tray assembly, a battery pack assembly and a vehicle. The tray assembly comprises a tray bottom plate and a battery pack, the tray edge beam is arranged on the outer edge of the tray bottom plate in a surrounding mode so that a containing space can be defined by the tray edge beam and the tray bottom plate together. The reinforcing pieces are located on at least one side of the tray bottom plate, and the reinforcing pieces are connected with the tray bottom plate and the tray edge beams respectively. According to the tray assembly designed by the utility model, the reinforcing piece is arranged, so that the structural strength of the joint of the tray bottom plate and the tray edge beam can be increased, the local stress is reduced, and the fatigue performance is improved.

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.

This invention discloses a highly efficient degassing refining agent for magnesium alloy ingots and its preparation method in the field of molten metal purification. The refining agent is composed of lanthanum fluoride-supported titanium carbide nanocomposite, calcium zirconate and graphene oxide nanohybrid, and various components such as anhydrous magnesium chloride, anhydrous sodium fluoride, anhydrous potassium chloride, metallic calcium powder, barium carbonate, and alumina micro powder in a specific ratio. Its preparation mainly includes: first, dispersing titanium carbide nanoparticles and reacting them with a lanthanum fluoride-containing solution, followed by hydrothermal treatment and calcination to obtain the lanthanum fluoride-supported titanium carbide nanocomposite; second, mixing a zirconium calcium salt solution with a graphene oxide dispersion, followed by urea co-precipitation, hydrothermal reaction, and calcination under a protective atmosphere to obtain the calcium zirconate and graphene oxide nanohybrid. This invention, through the synergistic effect of two inorganic modifying compounds, can deeply remove hydrogen and inclusions from magnesium melt, thereby significantly improving the metallurgical quality and overall performance of magnesium alloy ingots.

The invention discloses non-quenched and tempered steel, a preparation method and application. The non-quenched and tempered steel comprises, by weight, 0.38%-0.45% of C, 0.15%-0.35% of Si, 0.60%-0.90% of Mn, smaller than or equal to 0.025% of P, smaller than or equal to 0.025% of S, smaller than or equal to 0.20% of Cr, smaller than or equal to 0.05% of V, smaller than or equal to 0.15% of Ni, smaller than or equal to 0.20% of Cu, smaller than or equal to 0.10% of Mo, 0.010%-0.050% of Al, 0.005%-0.020% of N and the balance Fe and other inevitable impurities. The non-quenched and tempered steel is medium-carbon non-quenched and tempered steel with high strength, high toughness and fatigue performance, and can be applied to piston rods of large engineering machinery.

This invention relates to the field of hot extrusion manufacturing technology, specifically to a high-strength weldable 6xxx series aluminum alloy profile, its manufacturing method, and its application. The aluminum alloy profile is composed of the following weight percentages: Si: 0.80%~1.2%, Fe≤0.20%, Cu: 0.40%~0.80%, Mn: 0.30%~0.70%, Mg: 0.70%~1.1%, Cr≤0.25%, Zn≤0.10%, Ti≤0.10%, Zr: 0.05%-0.20%, Pb<0.01%, with the balance being Al and unavoidable impurities. The profile meets the following performance requirements: tensile properties, R... m ≥420MPa, R p0.2 ≥330MPa, A 50mm ≥8.0%; Fatigue performance: at r=0.1, N=1×10 7 Under the same conditions, the fatigue strength σ of the smooth sample is ≥145MPa, realizing the lightweight manufacturing of high-speed trains.

The present invention discloses a controlled swing steel frame with column lifting based on a piston device, comprising a foundation, a lower column, a steel base and an upper column which are fixedly connected in sequence from bottom to top; the steel base is hollow inside, and a piston device is fixedly arranged inside the steel base, the piston device comprises a piston cylinder, a piston and a piston rod, the piston is slidably connected in the piston cylinder, and the sliding direction is the vertical direction, a spherical groove is arranged on the top of the piston, the bottom end of the piston rod is spherical and limited in the piston, the spherical groove of the piston and the bottom end of the piston rod form a ball joint structure, and the top end of the piston rod is fixedly connected to the bottom end of the upper column. While ensuring that the structure has sufficient earthquake resistance, it can effectively reduce the swing deformation of the structure under the action of an earthquake, reduce the risk of overturning, improve the self-reset and energy consumption capacity of the steel frame, and realize the rapid recovery of the structure's post-earthquake function.

The invention belongs to the technical field of metal surface modification, and particularly relates to a strengthening-coating integrated surface life prolonging method for Ti2AlNb alloy. The method comprises the following steps: firstly, carrying out impact treatment on a Ti2AlNb alloy matrix by adopting pulse laser, inducing the surface of the matrix to generate phase change from an alpha2 phase to a B2 phase and an O phase, and meanwhile, generating pressure stress on the surface of the matrix; then pressure stress machining is adopted, the surface of the base body subjected to impact treatment is subjected to certain machining, the roughness meets the coating manufacturing requirement, and meanwhile a pressure stress layer generated by impact cannot be damaged; and finally, coating on the surface in a pressure stress state to manufacture the wear-resistant coating by utilizing metallurgical bonding between a phase generated by phase change and a coating. Large residual compressive stress is generated on the surface of the Ti2AlNb alloy through laser shock, the surface hardness and fatigue performance of the pipe bending die steel are improved, meanwhile, the bonding strength of a base body and a coating is improved by means of dislocation, twin crystals and other substructures formed by surface laser shock of the pipe bending die steel and phase change caused by dislocation, twin crystals and other substructures, and the service life of the pipe bending die steel is prolonged. And therefore, the service life of the Ti2AlNb alloy is prolonged.

The application discloses a metal powder type flux-cored wire suitable for 1.5GPa-grade aluminum-silicon plated layer hot forming steel and a preparation method thereof. The component design of the application is reasonable, the process compatibility is good, the welding penetration is large, the workpiece deformation is small, and the welding efficiency is high, so that the high reliable connection requirement of 1.5GPa-grade aluminum-silicon plated layer hot forming super-high-strength structural parts can be met. Meanwhile, the preparation process is mature, and the application can be produced on a large scale. The technical problems of insufficient joint strength, serious softening of heat affected zone, poor crack resistance and weak laser welding adaptability of the existing similar welding wires are solved.

The application belongs to the technical field of heterogeneous steel additive manufacturing, and particularly relates to a kind of heterogeneous steel based on laser additive manufacturing and a preparation method of shell-like nacreous layer structure, the shell-like nacreous layer structure heterogeneous steel includes multiple layers of bionic heterogeneous structure layer, each layer of bionic heterogeneous structure layer includes multiple shell-like nacreous layer structure unit bodies, each shell-like nacreous layer structure unit body includes four square modules, each square module includes two long rectangular martensite steel regions and two long rectangular austenite steel regions which are parallel to each other, long rectangular martensite steel regions and long rectangular austenite steel regions are arranged at intervals, the direction of long rectangular martensite steel regions and long rectangular austenite steel regions in any two adjacent square modules in each layer of bionic heterogeneous structure layer is perpendicular, and the direction of long rectangular martensite steel regions and long rectangular austenite steel regions in any two adjacent square modules in any two adjacent layers of bionic heterogeneous structure layer is perpendicular, and the application realizes the synergy of strength and toughness of material.

This utility model relates to the field of building structure vibration reduction technology, specifically to a viscous damper with external circulation and intelligent monitoring, comprising: a damper body, an external circulation system, an intelligent monitoring system, and a protective cover. The external circulation system is installed on the outside of the damper body, the intelligent monitoring system is installed on the damper body, and the protective cover is installed on the damper body with the external circulation system located inside the protective cover. The external circulation system includes: an external circulation pipe; the intelligent monitoring system includes: a temperature and pressure integrated sensor and a force sensor. This utility model has advantages such as high heat dissipation efficiency, long service life, and real-time monitoring capability, and is suitable for the field of building structure vibration reduction.

A fuel cell separator obtained by molding a composition containing graphite powder and an epoxy resin component containing a main agent, a curing agent, and a curing accelerator, in which the average particle diameter d50 of the graphite powder is 20 to 80 µm, and the average height of the graphite powder measured using a laser microscope is 30 to 70% of the average particle diameter d50, has good bending strength and bending fatigue characteristics even in an environment of 70°C.

The invention provides a short-process low-cost preparation method for a 300M steel undercarriage sleeve forging, and belongs to the technical field of forging and pressing. According to the short-process low-cost preparation method for the 300M steel undercarriage sleeve forging, the problems of large material consumption, long process flow and the like in a traditional production process are solved, the urgent requirements of advanced aircrafts on the aspects of product quality, manufacturing cost and the like can be met, and the method has great economic and social benefits. According to the method, single-heating-number one-forging forming is adopted, the sleeve forge piece with an inner hole with a certain depth can be obtained, the machining allowance is small, the material utilization rate is high, the cost is low, and the production efficiency is high; according to the method, flash-free forging is achieved, the risk that a cross section grain streamline of the sleeve forge piece is cut off and exposed is avoided, the stress corrosion resistance and the fatigue resistance of parts are improved, and the service requirements of airplanes for the safety and the reliability of key parts are met.

The invention provides a laser three-dimensional forming preparation method for preparing a gradient reinforced composite material turbine blade of a gas turbine. The method comprises the following steps: ball-milling and mixing nickel-based alloy, nano silicon carbide and boron carbide powder according to a mass ratio of (92-96): (2-4): (2-4); a laser three-dimensional forming technology is adopted, a three-section gradient structure of a non-strengthening area (pure nickel base alloy), a transition area (gradient mixing) and a strengthening area (composite material) is constructed in the root-tip direction of the blade through a two-way powder feeding system, and near-net forming of the functional gradient strengthening turbine blade with the ceramic strengthening phase strengthening at the tip end of the blade and the root part maintaining toughness is achieved. The prepared turbine blade of the gas turbine has excellent high-temperature creep resistance, fatigue resistance, corrosion resistance and wear resistance, works for a long time in severe environments such as high temperature, high pressure, wear and corrosive media, has excellent high-temperature creep damage resistance, low-cycle fatigue damage resistance, corrosion damage resistance and friction damage resistance, and can effectively prolong the service life of the gas turbine.

The application belongs to the technical field of titanium alloy materials, and relates to a heat treatment method for realizing high strength, high toughness and high fatigue of Ti55531 titanium alloy, which comprises the following steps: firstly, Ti55531 titanium alloy bars are kept at a first two-phase zone temperature for heat preservation until the core temperature and the surface layer temperature are consistent, and then the temperature is raised to a specific temperature range in a single-phase zone for heat preservation to obtain beta single-phase structure titanium alloy bars; secondly, the beta single-phase structure titanium alloy bars are subjected to first cooling, the temperature is lowered to a second two-phase zone temperature, and after heat preservation, second cooling is performed, and then aging heat treatment is performed, so that finally Ti55531 titanium alloy finished bars are obtained. The Ti55531 titanium alloy finished bars have the comprehensive performance of high strength, high toughness and high fatigue, and the heat treatment method fully expands the application potential of Ti55531 titanium alloy in the structural part field.