501 results about "Creep" patented technology

The invention relates to the technical field of powder metallurgy, in particular to a preparation process of a graphene composite profile prepared from brass waste, which comprises the following steps: selecting the brass waste containing different components according to the application scene of the graphene composite profile; the brass waste materials are smashed into brass block-shaped smashed materials; the preparation method comprises the following steps: adding 0.001-10% by mass of graphene into the brass block-shaped crushed aggregates, and carrying out wet ball milling to form a first-size mixed powder liquid; carrying out semi-solid rotary shearing and stirring processing on the mixture; and continuously extruding the graphene-brass mixed base material to form a graphene composite profile blank, and carrying out post-process to obtain the graphene composite profile capable of overcoming brass spot, line and surface defects. According to the invention, a powder metallurgy process is combined with a medium-temperature continuous extrusion process, so that the brass waste is efficiently and directly recycled without pollution, and the physical properties and chemical properties such as hardness, strength, conductivity, corrosion resistance and high-temperature creep resistance of the composite material are greatly improved. The invention further correspondingly discloses the graphene composite profile and application.

An austenitic stainless steel material is provided that has high creep strength even when used at an average operation temperature of more than 600 to 750° C. after welding with higher heat input, and furthermore, has excellent stress relaxation cracking resistance even after use for a long time period at the average operation temperature after welding with higher heat input. The steel material has a chemical composition which consists of, in mass %, C: 0.030% or less, Si: 1.50% or less, Mn: 2.00% or less, P: 0.045% or less, S: 0.0300% or less, Cr: 15.00 to 25.00%, Ni: 8.00 to 20.00%, N: 0.050 to 0.250%, Nb: 0.10 to 1.00%, Mo: 0.05 to 5.00%, and B: 0.0005 to 0.0100%, with the balance being Fe and impurities, and a ratio of the dissolved N amount (mass %) with respect to the content of N (mass %) in the steel material is 0.40 to 0.90.

The invention discloses a method for preparing a foam core composite material component, and relates to the technical field of composite material component preparation. The foam core composite material component consists of two parts: foam and a composite material outer skin. The preparation method proposed by the invention comprises the following steps: firstly laying a layer of foam film on the foam, and then laying the outer skin. Common composite material forming processes such as molding, autoclave, and bag pressing can be adopted. In the preparation method of the invention, the foam film is not affected by the shape of the foam core composite material component and the mold structure during the forming process, and can provide internal expansion force, reduce the influence of the prepreg glue content, surface weight, etc. on the thickness difference of the blank; reduce the foam processing size error and the influence of the mold processing size; reduce the influence of high temperature creep during the foam forming process; reduce the influence of mold temperature unevenness, pressure unevenness, and thermal expansion coefficient difference; and greatly improve the reliability of the internal quality of the sandwich composite material component.

The invention relates to the technical field of alloy performance prediction, in particular to a nickel-based superalloy creep prediction method considering hot corrosion environment damage, and the method comprises the following steps: obtaining a nickel-based superalloy test piece; calibrating an equivalent hot corrosion damage coefficient according to data of the hot corrosion-creep test; calculating equivalent hot corrosion damage according to the thickness of the control element depletion layer and the equivalent hot corrosion damage coefficient; acquiring a creep constitutive model; equivalent hot corrosion damage is introduced into the creep constitutive model, and a hot corrosion-creep constitutive model is obtained; and according to the hot corrosion-creep constitutive model, predicting the creep of the hot corrosion environment damage of the nickel-based superalloy. According to the method, the creep life of the nickel-based superalloy in the hot corrosion environment can be predicted to be within 1.2 times of an error scattering band, and the creep damage condition of the nickel-based superalloy in the hot corrosion environment can be reflected.

The invention relates to the technical field of welding materials, in particular to a high-efficiency deposited nickel-based welding wire capable of preventing welding cracks based on phase regulation and application of the high-efficiency deposited nickel-based welding wire, and the nickel-based welding wire comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C, 0.10-0.20% of Si, 2.9-3.2% of Mn, and 1t of P; 0.005%, S: lt; 0.003% of Cu, 19.7-20.5% of Cr, less than or equal to 0.04% of Co, and 1t of Cu; the Ni-based alloy comprises the following components in percentage by weight: 0.10% of Ni, 0.3-0.6% of Ti, 0.4-2.0% of Fe, 2.1-2.9% of Nb, less than or equal to 0.3% of Mo, less than or equal to 0.01% of N, less than or equal to 0.005% of O, less than or equal to 0.50% of other impurity elements and the balance of Ni. The specific value of Ti to Nb is controlled to be 0.10-0.22, the specific value of C to Nb + Ti is controlled to be 0.012 or below, appropriate morphology and distribution of (Nb, Ti) C type intergranular precipitates are obtained, precipitation of grain boundary M23C6 is reduced, and the creep resistance and high-temperature deplasticity crack resistance of the material are effectively optimized.

The invention belongs to the field of high-temperature alloy powder metallurgy, and particularly relates to a low-cost and high-performance GH4079 alloy workpiece and a powder metallurgy forming method thereof. The powder metallurgy forming method comprises the steps that GH4079 spherical powder is adopted for preparing a GH4079 alloy blank, solid solution and aging heat treatment is conducted on the GH4079 alloy blank, and a GH4079 alloy workpiece is obtained; solid solution and aging heat treatment is conducted on the GH4079 alloy blank, the whole heat treatment process is simple, the process is simple and convenient, consumed time is short, energy consumption is lower, the method is suitable for industrial application, the obtained GH4079 alloy workpiece is excellent in mechanical property, and under the room temperature condition, the tensile strength is larger than 1500 MPa, the yield strength is larger than 1020 MPa, the ductility is larger than 20%, and the percentage reduction of area is larger than 25%; and under the condition of 650 DEG C / 882 MPa, the endurance life is longer than 210 h.

The invention discloses an annular furnace heat-resistant supporting forged chassis and an additive manufacturing process and a fixing device thereof, and belongs to the technical field of plating of metal materials, and the annular furnace heat-resistant supporting forged chassis comprises the steps that heat-resistant alloy steel base metal with specific components is prepared; carrying out laser texturing and nickel-based alloy bottom layer pretreatment on the surface of the steel plate; performing laser cladding on high-silicon high-temperature alloy powder containing niobium and rare earth elements to form a functional cladding layer, and performing gradient cladding on the edge of the atmosphere guide hole; and finally, carrying out heat treatment and assembling with a fan-shaped refractory brick fixing device. A composite oxide film and a multi-scale strengthening system are constructed, hydrogen resistance and brittleness resistance are effectively achieved, interface thermal stress is relieved, cracking and stripping of a cladding layer are avoided, a fixing device adapts to thermal expansion, the atmosphere is dredged, and the annealing uniformity of a steel coil is improved; the problems of creep deformation, hydrogen embrittlement, cladding layer stripping and thermal stress cracking of a traditional supporting component under the conditions of high temperature, heavy load and nitrogen and hydrogen atmosphere are solved.

The invention discloses a method and system for regulating and controlling the volume fraction of variants in high-temperature alloy and a medium, and relates to the field of material science and engineering.The method comprises the steps that grain orientation data of any target high-temperature alloy sample is obtained, and a finite element model is constructed; obtaining the volume fraction of each variant in the target high-temperature alloy sample after electrolytic corrosion; performing a tensile experiment on any target high-temperature alloy sample at different temperatures and different tensile rates to obtain material attributes and a real stress-strain curve of the target high-temperature alloy; performing tensile simulation and creep simulation on the target high-temperature alloy in sequence by utilizing finite element software imported with a finite element model and a crystal plasticity constitutive model, and determining an optimal working condition corresponding to an expected variant volume fraction in the target high-temperature alloy; and under the optimal working condition, the target metal alloy is subjected to heat treatment through a creep stretching machine, and the target high-temperature alloy with the expected variant volume fraction is obtained. The volume fraction of the variants in the high-temperature alloy can be accurately regulated and controlled.

The medium-temperature radial forging method comprises the steps that pretreatment is conducted, specifically, a niobium-tungsten alloy extrusion bar blank is heated for 60-180 minutes at the temperature of 750-950 DEG C, rapid forging and straightening are conducted, and a medium-temperature radial forging bar blank is obtained and annealed for 60-120 minutes at the temperature of 1250-1450 DEG C; medium-temperature radial forging is conducted, specifically, a two-step method is adopted, in the first step, a bar blank is preheated to 80-100 DEG C and coated with Ta1350 high-temperature glass powder, heat preservation is conducted for 90-180 minutes at the temperature of 1050-1150 DEG C, and the bar blank is forged into a bar with the diameter of 70 + / -1 mm in the mode that the diameter is reduced by 7-10 mm every time; and in the second step, the heating and coating processes are repeated, the diameter is reduced by 5-7 mm every time, and the bar with the required specification is manufactured. By optimizing the medium-temperature forging and annealing process, the fine grain structure is controlled, the high-temperature mechanical property, creep resistance and oxidation resistance of the material are improved, and the material is suitable for aerospace engines and other high-temperature and high-pressure scenes. Compared with a traditional method, the technology improves the yield, shortens the production period, reduces the labor intensity, is suitable for large-scale production, reduces surface air suction, oxidation and burning loss, and improves the production efficiency and the finished product quality.

The invention discloses a preparation method of a TA11 alloy bar with high creep resistance. The preparation method comprises the following steps: S1, ingot casting preparation: performing VAR smelting on an alloy for three times to obtain a TA11 alloy ingot with components meeting requirements; s2, intermediate billet forging is conducted, specifically, the qualified cast ingot obtained in the S1 is subjected to two-heating-number forging at the temperature higher than the beta phase transformation point temperature, and an intermediate billet is obtained; s3, multi-heating-number circulating forging is conducted, specifically, the TA11 alloy intermediate blank obtained in the S2 is subjected to five-heating-number forging deformation within the range above and below the beta phase transformation point temperature, and an intermediate precision forging blank which is uniform in structure and high in alpha phase content is obtained; and S4, finish forging machining of a finished product bar is conducted, specifically, finish forging machining is conducted on the TA11 alloy intermediate finish forging blank obtained in the S3 at the temperature below the phase transformation point temperature, and the TA11 alloy bar with the high creep resistance is obtained. The TA11 alloy bar prepared through the method is high in alpha-phase content and stable in control, the structure is uniform and consistent, and the high-temperature creep resistance is stably controlled to be smaller than or equal to 0.15%.

The invention discloses a high-strength and high-elongation SnPbSbInAu alloy solder and a preparation method thereof. The alloy solder comprises the following components in percentage by weight: 33.0 to 36.5 percent of Pb, 2.0 to 4.0 percent of Sb, 1.5 to 3.5 percent of In, 2.0 to 3.5 percent of Au, 0.005 to 0.012 percent of P and the balance of Sn. The preparation method of the foil strip comprises the steps of vacuum pressure casting, strip cold extrusion and cold roller rolling, the wire preparation method comprises the steps of one-time extrusion forming and close-packed rewinding, and the powder paste preparation method comprises the steps of vacuum gas atomization powder preparation, airflow screening and planetary centrifugal degassing paste preparation. The solid-liquid phase temperature of the solder ranges from 180 DEG C to 185 DEG C, the solder has the advantages of being high in ductility, strength and creep resistance, excellent in low-temperature service performance and the like, and the tensile strength of a brazed joint of the solder is two times higher than that of a Sn-37Pb eutectic solder under the same welding process; and the gold etching risk is low, and a gold-plated piece can be directly welded (without tinning treatment).

The invention belongs to the technical field of rock engineering, discloses a carbonaceous slate unsteady creep model construction method based on time-stress evolution, and aims to solve the problem that creep parameters of existing carbonaceous slate cannot be accurate due to the fact that the creep parameters are regarded as constants or expressed by a nonlinear function. The unsteady creep model comprises an improved generalized Kelvin body and a Newton body with a switch, wherein the Newton body takes the stress level into consideration, and the improved generalized Kelvin body is connected with the Newton body with the switch in series. According to the method, more accurate creep parameters of the carbonaceous slate can be obtained, and a theoretical model is provided for tunnel surrounding rock creep deformation research and tunnel long-term stability analysis of a carbonaceous slate stratum tunnel penetrating through an extremely high crustal stress area.

The invention discloses a maturity theory-based mass concrete early cracking index and spatial and temporal distribution prediction method. According to the method, the cracking possibility of the mass concrete is evaluated by uniformly adopting the cracking index and the spatial and temporal distribution thereof. In order to improve the calculation precision of the cracking index and the spatial and temporal distribution of the mass concrete, the reaction heat of a cementing material at 20 DEG C, 40 DEG C, 60 DEG C and 80 DEG C, and the tensile strength, the elastic modulus and the porosity of the concrete are tested, and the tensile strength and the elastic modulus under high-temperature damage are corrected through a porosity test result; a temperature field, a temperature strain field, a shrinkage strain field, an elastic modulus field, a stress field and a tensile strength field of the mass concrete are calculated based on a maturity theory and spatial and temporal distribution, and meanwhile, a relaxation coefficient is introduced to consider the influence of creep on stress, so that the accuracy of predicting the cracking index and the spatial and temporal distribution of the mass concrete is improved.

The invention discloses a concrete creep test method considering a plateau severe environment, which comprises the following steps: preparing a concrete member in the plateau severe environment, and embedding and installing test equipment; pre-stress is applied to the concrete member in a grading mode, and the load value of the applied pre-stress is calculated according to the number of the steel strands installed in the test piece and the area of the single steel strand; acquiring stress parameter change data of the concrete creep model by adopting an automatic acquisition device; a climate testing device is installed in the severe plateau environment to test meteorological parameters such as wind speed, temperature, humidity, ultraviolet coefficient, altitude and oxygen content; the structural stress and meteorological parameters are applied to the analysis model, and the concrete creep performance considering the severe plateau environment is obtained. According to the method, the creep performance of the concrete in the severe plateau environment can be obtained, and technical support is provided for obtaining the creep characteristics of the prestressed concrete structure.

The invention belongs to the technical field of conductor materials, and particularly relates to a creep-resistant high-strength high-conductivity aluminum alloy conductor material and a preparation method and application thereof. In the preparation process of the creep-resistant high-strength high-conductivity aluminum alloy conductor material provided by the invention, Be, Mo, Co and the like are introduced into the aluminum alloy conductor material through the intermediate alloy, and AlB3 is used for boronizing treatment; meanwhile, an expansion extrusion process is introduced between aluminum alloy continuous casting and continuous rolling processes, pre-aging treatment is carried out after solid solution heat treatment, and final aging treatment is carried out after drawing treatment; the components and the preparation process of the aluminum alloy conductor material are improved, the comprehensive performance such as conductivity, creep resistance and strength is remarkably improved, the comprehensive performance requirements of new energy automobiles on aluminum alloy conductors can be met, and the technical problem that in the prior art, the comprehensive performance of the aluminum alloy conductor material is poor is solved.

The invention provides a method for rapidly evaluating the residual life of a high-temperature material for active service equipment, and belongs to the field of life evaluation in the field of materials. The method comprises the following steps: firstly, obtaining high-temperature creep relaxation rates and high-temperature creep endurance life information of two or more samples at different temperatures, and determining main curve equations and corresponding parameters ZSRT of different time sequence tissue states; thirdly, main curve equations of different time sequence organization states and corresponding parameters Zc are obtained, and the incidence relation between the ZSRT and the Zc is established; 5, for the to-be-evaluated alloy, obtaining a high-temperature creep relaxation rate main curve equation and a corresponding parameter ZSRT of the to-be-evaluated alloy; and 6, calculating the parameter Zc of the to-be-evaluated alloy by using the incidence relation between the ZSRT and the Zc, and establishing a high-temperature creep endurance life main curve equation through the parameter Zc to realize life evaluation. The method has the advantages of short test time, less material loss, high data utilization rate and the like, and is particularly suitable for evaluating the endurance life caused by the change of the structure state.

The invention discloses a high-temperature-resistant austenite heat-resistant casting alloy material and an application method thereof, and belongs to the technical field of austenite heat-resistant casting alloy materials. The alloy material comprises C, Si, Mn, Cr, Al, Nb, Ti, Zr, N, Mo, W, Y, Ni and Fe elements with specific mass percentage content. Wherein the mass percentage contents of the C, Cr, Al and Ti elements meet the condition that the value of f1 obtained by the calculation model 1 meets the condition that f1% is larger than or equal to 2%, and f1% represents the volume percentage content of an M23C6 precipitated phase of the alloy material at the application temperature of 1100 DEG C or above. The alloy material obtained by the invention has remarkable high-temperature creep resistance in an extreme high-temperature environment, has a stable and compact oxidation film and reinforced carbide, and can keep excellent structural stability and high-temperature mechanical properties under a long-term service condition.

The invention belongs to the technical field of high-temperature alloys. Specifically, the invention provides a forming method of the NiCr20TiAl high-temperature alloy rolled metal, and the invention further provides the NiCr20TiAl high-temperature alloy rolled metal prepared by the forming method. The forming method comprises the following steps: heating a NiCr20TiAl high-temperature alloy square billet to about gt; the method comprises the following steps: heating a billet to a temperature in the range of 1120 DEG C to about 1200 DEG C, holding the billet at the temperature for about 1 to about 2 hours, and then subjecting the held billet to rolling. According to the forming method, the grain size uniformity of the rolled NiCr20TiAl high-temperature alloy bar can be improved, the total cross-section grain size of the bar ranges from 3 grades to 8 grades, the total cross-section grain size grade difference is smaller than or equal to 3 grades, and therefore the optimal high-temperature durability performance is achieved.

The invention belongs to the technical field of alloys, and provides a lightweight refractory multi-principal-element alloy with excellent high-temperature creep property, and a preparation method and application thereof. The general formula of the light refractory multi-principal-element alloy with the excellent high-temperature creep property is TiaVbAlcCrdMoe, wherein 43% < = a < = 48%, 43% < = b < = 48%, 2% < = c < = 8%, 2% < = d < = 8% and 1% < = e < = 5%, a + b + c + d + e = 100%, and a, b, c, d and e are mole percentages. The alloy presents an isometric crystal structure in a complete recrystallization state in a thermal mechanical treatment state, the phase structure is a single-phase body-centered cubic BCC structure, the alloy has low density and shows excellent creep property at 650 DEG C / 100 MPa, the creep time exceeds 90 h, and the creep elongation is lower than 10%.

The invention discloses an overflow brick, device and method for stably producing substrate glass, and belongs to the technical field of liquid crystal substrate glass manufacturing. According to the overflow brick provided by the invention, a split type arched overflow brick structure is adopted, so that the influence of the gravity of the overflow brick on the production stability is weakened; meanwhile, a supporting and clamping device of an L-shaped structure is introduced, and negative effects caused by creep deformation are counteracted by applying horizontal clamping acting force. The fixed connecting surface of the first brick body and the second brick body is designed to be the arched curved surface, and the clamping acting force provided by the supporting and clamping device is combined, so that the overall structural stability of the overflow brick is enhanced, and the overflow brick can work stably in a high-temperature and long-time working environment; the creep phenomenon possibly occurring in the production process of advanced-generation substrate glass can be inhibited, and deformation is effectively resisted; and the molten glass is ensured to overflow and pull down in a stable and uniform state, so that the thickness uniformity of the overflow glass is improved, and the production quality of the substrate glass is improved.

The invention provides a method for connecting a titanium-aluminum material and a nickel-based superalloy and a brazing filler metal composition, and relates to the technical field of material welding, and the brazing filler metal composition for connecting the titanium-aluminum material and the nickel-based superalloy comprises a high-entropy alloy middle layer and a Cu middle layer. The Cu intermediate layer is introduced between the high-entropy alloy intermediate layer and the base metal nickel-based superalloy, the low melting point of the Cu intermediate layer is utilized, the Cu intermediate layer is melted into a liquid phase in the welding process, a high-temperature liquid phase environment is formed, element diffusion of the high-entropy alloy intermediate layer and the nickel-based superalloy is facilitated, element exchange between the high-entropy alloy intermediate layer and the nickel-based superalloy is promoted, and the welding quality is improved. And the welding temperature is reduced by 30-100 DEG C, the welding temperature is reduced to 1100-1160 DEG C, the welding temperature is lower than the Ni-based high-temperature alloy solution treatment temperature, Ni-based high-temperature alloy grain growth is avoided, the high-temperature creep property of the Ni-based high-temperature alloy grain growth is kept, the joint structure is optimized, and the welding quality is improved.

To provide a high Ni alloy containing Nb and N that has superior high-temperature creep strength.SOLUTION: A high Ni alloy having superior high-temperature creep strength, the alloy comprising, in mass%, C: 0.08% or less, Cr: 20-30%, Ni: 23-60%, Al: 0.01-0.20%, Ti: 0.05% or less, B: 0.0002-0.0050%, N: 0.10-0.30%, O: 0.006% or less, Ca: 0.0001-0.0050%, at least one of Mo and W in an amount of Mo+0.5×W: 0.01-1.50% (less than 1.50%), Nb: 0.10-0.65%, and at least one of V and Ta in a total amount of 0.01-0.60%, and satisfying the following [Limiting Expression A], and characterized in that the total amount (Nb) of Nb precipitated in the steel material is 0.11 mass% or less. [Limiting Expression A] 0.65≤Nb%+2×V%+Ta%≤1.60.SELECTED DRAWING: Figure 1

The invention discloses a dam material transient-creep parameter progressive optimization inversion method, and belongs to the technical field of dam material parameter inversion, and the method comprises the steps: carrying out the alternating progressive optimization inversion of a multi-objective function set of a transient parameter and a creep parameter until the inversion precision corresponding to the inversion parameter optimal solution obtained through two times of continuous inversion is the same, and obtaining a transient-creep parameter optimal solution; and taking the optimal solution of the transient parameter and the creep parameter obtained by the current inversion as a transient-creep parameter inversion result. According to the method, the transient and creep parameters of the dam are efficiently and accurately identified, so that the inversion precision and the calculation efficiency are improved, the physical rationality of the result is ensured, and reliable support is provided for safety monitoring and risk assessment in the operation period of the dam.

The invention relates to a method for optimizing tempering heat preservation time in the tempering process of a supporting roller forge piece based on a finite element model, belongs to the technical field of heat treatment of the supporting roller forge piece, and solves at least one of the problems of energy waste, equipment occupation, high product cost and the like caused by overlong tempering time of an existing method. According to the method, the tempering heat preservation time of the supporting roller is optimized by integrating changes of the temperature, the structures and the residual stress, and the reduction or stabilization time of the residual stress is judged according to stress relaxation curves of different structures and is not obtained through finite element simulation in the creep deformation process; according to the method for judging the stress relaxation degree under the conditions of different structures and loads, namely, the stress relaxation curve is normalized, and the method can be directly and repeatedly used for optimizing the tempering heat preservation time of the supporting rollers which are made of the same material and have different specifications and different process parameters.

The invention provides a high-temperature-resistant creep-resistant tungsten alloy, and relates to the technical field of powder metallurgy, the tungsten alloy comprises, by mass, 3-8 wt% of Re, 0.2-1 wt% of carbide, 0.1-0.5 wt% of boride, and the balance tungsten and inevitable impurities; the carbide is selected from one or more of TiC, ZrC, TaC and HfC; the boride is selected from one or more of TiB2 (titanium diboride), HfB2 (hafnium diboride) and ZrB2 (zirconium diboride). The high-temperature-resistant creep-resistant tungsten alloy is prepared by adding low-content rhenium, carbide and boride into pure tungsten and adopting a unique preparation method, and the technical defects that an existing tungsten-rhenium alloy is insufficient in strength and creep resistance at the ultrahigh temperature (larger than or equal to 2000 DEG C), and a traditional multi-pass processing technology is complex are overcome.

The invention provides a surrounding rock creep anchor rod timeliness test system under a high ground stress-high temperature coupling effect, and the system comprises a sample, an anchor rod drawing loading system, a confining pressure pressurization assembly, a heating assembly and a data monitoring assembly, and the confining pressure pressurization assembly and the heating assembly apply confining pressure and a temperature field to the sample; the high ground stress-high temperature coupling environment of the deep composite rock mass is simulated, a sample is placed in the high ground stress-high temperature coupling environment of the simulated deep composite rock mass, various parameter data of the sample are detected in real time through the data monitoring assembly, and then various parameter data monitored by the data monitoring assembly in real time are analyzed, so that the high ground stress-high temperature coupling environment of the deep composite rock mass is simulated. The influence of the creep effect of the deep composite rock mass on the anchoring performance of the anchor rod is deeply researched, so that the anchoring interface damage evolution rule under the multi-strain-rate coupling effect is disclosed.

The invention relates to a high-entropy alloy with excellent creep property and a preparation method thereof. The alloy is expressed as FeaCobCrcNidTapAlqMn by atomic mole percentage, and 10 < = a < = 20, 20 < = b < = 25, 10 < = c < = 20, 25 < = d < = 35, 5 < = p < = 10, 0 < = q < = 8, and 0 < = n < = 5. The preparation method comprises the steps that all the raw materials are taken according to the designed components, then smelting is conducted under the protective atmosphere, and after solid solution water quenching treatment, hot rolling treatment and secondary solid solution treatment are conducted, heat preservation is conducted at the temperature of 750-950 DEG C, and then quenching is conducted. The product is obtained by reasonably regulating and controlling components and performing thermal deformation and thermal treatment processes. Under the high-temperature creep condition of 750 DEG C / 350 MPa, the service life of the obtained product reaches up to 1245 h and is far longer than that of similar products, the room-temperature tensile strength is larger than 1.5 GPa, the bottleneck that a Laves type eutectic high-entropy alloy does not have room-temperature tensile plasticity is broken through, and wide engineering application prospects are achieved.

The invention provides a method and a system for evaluating the creep life of a single crystal blade repaired by hot isostatic pressing, and relates to the technical field of engine blade repair. Comprising the following steps: obtaining the porosity of a single crystal blade subjected to hot isostatic pressing repair; the porosity is input into a quantitative mapping model, material creep performance parameters of the repaired single crystal blade are obtained, and the material creep performance parameters comprise critical slitting stress and an initial creep damage rate; and based on the service condition of the single crystal blade, substituting the material creep performance parameters into a creep life prediction model, and calculating to obtain the predicted creep life of the single crystal blade. According to the method, the quantitative mapping model of the porosity and the mechanical property parameters is established, the limitation of traditional dependence on destructive long-time tests is broken through, efficient and nondestructive evaluation of the creep life of the repaired blade is achieved, the evaluation result is reliable, the maintenance efficiency is remarkably improved, and the cost and the risk are reduced.

The invention discloses a heat-resistant aluminum alloy material and a preparation method thereof, and relates to the technical field of metal material metallurgy, and the heat-resistant aluminum alloy material comprises the following components in parts by weight: 78-85 parts of pure aluminum ingot; 4-6 parts of electrolytic copper blocks; 1.5 to 2.5 parts of magnesium ingot; 0.8 to 1.5 parts of zinc particles; 2 to 3.5 parts of metal nickel powder; 0.1 to 0.3 part of titanium-aluminum alloy; 0.05 to 0.15 part of a zirconium-aluminum alloy; 0.08 to 0.2 part of scandium aluminum alloy; 0.05 to 0.12 part of a cerium rare earth metal block; according to the aluminum alloy material disclosed by the invention, the high-temperature performance of the aluminum alloy material is remarkably improved by optimizing the composition proportion of the alloy. Elements such as copper and nickel are added to form a stable strengthening phase, so that the high-temperature strength and the creep resistance are enhanced; due to introduction of rare earth elements cerium and scandium, crystal grains are refined, and the thermal stability of the material is improved; and through compound addition of zirconium and titanium, grain boundary migration at high temperature is further inhibited, the softening phenomenon is effectively delayed, and the material still keeps excellent mechanical properties and oxidation resistance in a long-term high-temperature environment.

According to the method for establishing the rock fractional order creep model under the disturbance effect, test results of rock samples under different confining pressures are obtained, a strain-time curve of the rock samples is drawn according to the creep test results, a proper creep model is obtained in combination with a basic element model, and the rock fractional order creep model is established under the disturbance effect. And respectively adding a damage model and a fractional order model into the creep model, and establishing a damage fractional order creep model. Compared with a traditional model, the fitting result of the improved creep model is consistent with the test result, it is indicated that the improved fractional order model can express the creep behavior of tuff under the complex stress condition, and the defect that the traditional model is difficult to describe the accelerated creep stage is overcome; the evolution law of rock mechanical parameters in the whole creep process is displayed through fractional order change.