693 results about "Hot working" patented technology

The invention relates to the technical field of twinborn model simulation, and discloses a twinborn model simulation method and system for hot working of large forgings. The method comprises the following steps: collecting and preprocessing process parameters, quality data and environment information in a multi-source manner, and obtaining hot working characteristic data; performing correlation analysis to construct a process knowledge graph; calculating the distribution of a temperature field, a stress field and an organization field by using a self-sensing multi-field coupling var value neural network; comparing and analyzing to obtain deviation data and correction parameters; adjusting a network parameter optimization prediction result; and executing multi-objective optimization calculation, and generating a whole-process technological parameter and a control instruction. According to the method, full-process multi-physics field coupling calculation from smelting, casting, forging and pressing to heat treatment can be achieved, model parameters are dynamically adjusted according to real-time production data, the optimal process scheme is generated, and therefore the manufacturing quality and efficiency of large forgings are improved.

The invention relates to the technical field of processing temperature control, and discloses a temperature control method and system for a hot processing process and a storage medium. The method comprises the following steps: collecting hot working whole process temperature data through multiple sensors, calculating a temperature change rate, an extreme point and a uniformity index, and obtaining key characteristic parameters; establishing a quantitative relation matrix of the process parameters and the temperature field by using an orthogonal test; calculating an optimal process parameter combination based on the matrix by using a rolling time domain optimization algorithm to generate a control instruction; and performing execution opportunity and duration prediction and correction on the instruction to form a precise target control instruction. The temperature control precision and stability in the hot working process of the large alloy steel component are improved, so that the product quality is improved, the energy consumption is reduced, and the production period is shortened.

The invention belongs to the technical field of gas turbine maintenance, and particularly relates to a solid-state repair method for a hot-end component of a gas turbine, which comprises the following steps: S1, acquiring damage information of the surface of a to-be-repaired matrix; s2, roughening treatment is conducted on a damaged area on the surface of the to-be-repaired base body, and electrochemical activation treatment is conducted on the roughened damaged area; s3, supersonic speed cold spraying treatment is conducted on the treated damaged area, and gradient materials are deposited on the damaged area layer by layer till a compact repairing layer is deposited on the surface of the base body; s4, selective laser remelting treatment is conducted on the compact repairing layer of the damaged area; s5, carrying out laser shock on the dense repair layer subjected to the remelting treatment; and S6, the base body subjected to laser shock treatment is machined till the standard geometric dimension of the base body is recovered. The method can solve the problems of large heat input, matrix damage, insufficient bonding strength and the like in the process of repairing the damaged area of the matrix in the traditional hot working technology.

The invention belongs to the technical field of aluminum alloy heat treatment, and particularly relates to a high-strength Al-Mg alloy and a preparation method thereof. According to the Al-Mg alloy, nucleation particles are provided for an AlMn second phase in an aluminum matrix through Mn and Zn alloying, and the activation energy of the AlMn second phase is reduced. According to the preparation method, the prepared alloy is mainly subjected to multi-stage homogenization treatment, and in multi-stage homogenization, the low temperature is used for second-phase pre-nucleation, the middle temperature is used for second-phase nucleation and precipitation, and the high temperature is used for coarse crystal phase redissolution. The alloy ingot is subjected to multi-stage homogenization heat treatment by adopting the method, the second phase precipitation number density of the alloy ingot can be remarkably improved, and the distribution uniformity of the alloy ingot can be improved, so that the strength of the alloy is improved, a large number of subcrystal structures are reserved in the alloy in the subsequent hot working process, and recrystallization and abnormal growth are effectively inhibited; and an optimal deformation structure is provided for obtaining a high-performance aluminum alloy product.

The invention relates to the technical field of metal material hot working, and discloses a hot-rolled coiled plate production process which comprises the following steps: preparing a reaction type protective agent, the high-temperature-resistant coating is prepared from the following raw materials in parts by weight: 20 to 40 parts of tetraethoxysilane, 5 to 15 parts of triethyl phosphate, 1 to 5 parts of triethyl borate, 0.5 to 2.0 parts of cerous nitrate (III) hexahydrate, 0.1 to 1.0 part of lithium acetate and 0.01 to 0.05 part of vanadyl acetylacetonate (IV). Coating the surface of a hot-rolled plate blank with the protective agent; the coated plate blank is heated in a heating furnace, so that the protective agent forms a molten-state protective layer in situ; carrying out hot rolling on the plate blank with the molten protective layer; and cooling and coiling the hot-rolled steel strip. In the whole heating and hot rolling process, the molten protective layer isolates the contact between the steel and the oxidizing atmosphere, so that the generation of oxide scales is fundamentally inhibited, the production process is simplified, and the metal yield is increased.

The invention belongs to the technical field of titanium alloy hot working stress analysis, and discloses a method and system for predicting high-temperature flow stress and plastic damage behavior of a titanium alloy, and the method comprises the following steps: obtaining true stress-true strain data of the titanium alloy through a high-temperature tensile experiment; establishing a unified constitutive model for predicting the high-temperature flow stress and the plastic damage behavior of the titanium alloy; and determining material parameters of the unified constitutive model for predicting the high-temperature flow stress and the plastic damage evolution behavior of the titanium alloy by utilizing a numerical difference principle and combining true stress-true strain data of the titanium alloy, and predicting the high-temperature flow stress and the plastic damage behavior of the titanium alloy under the conditions of constant temperature and constant strain rate. According to the method, through a titanium alloy high-temperature tensile experiment, a mathematical model for predicting the titanium alloy high-temperature flow stress and the plastic damage behavior is provided based on a dislocation density theory and a damage evolution mechanism, and the influence of plastic damage on the titanium alloy thermal deformation behavior is considered; and rapid and accurate prediction of the high-temperature flow stress and the plastic damage behavior of the titanium alloy under the high-temperature deformation condition is realized.

The invention discloses a novel cross-series difference light high-strength corrosion-resistant aluminum alloy and a preparation method thereof. Alloy components break through an existing aluminum alloy component system and comprise the following alloy elements in percentage by weight: 2-3.5 wt% of Mg, 1-2 wt% of Cu, 0.3-0.8 wt% of Li, 0-0.5 wt% of Si, at least two microalloy elements of Zr, Hf, Ti, V, Nb, Y, Sc or Er with the Mg / Cu weight ratio of 1.5-2 and the total content not exceeding 1 wt%, and the balance of Al and inevitable impurities. The preparation method of the alloy comprises the following steps: (1) casting the aluminum alloy; (2) homogenizing heat treatment; (3) carrying out thermal deformation to obtain a hot working material; (4) optionally obtaining a cold working material through cold deformation; and (5) the machined material is subjected to solid solution and aging treatment, and a finished product material is obtained. The aluminum alloy material shows excellent comprehensive service performance, including low specific gravity (2.64-2.67 g / cm < 3 >, lower than that of pure aluminum), high strength (peak aging tensile strength 430-460 MPa), excellent plasticity / toughness (peak aging elongation gt; the product of strength and elongation is gt; the stress corrosion resistance (the stress corrosion sensitivity coefficient is smaller than or equal to 5%) is achieved, and wide engineering application prospects are achieved.

The invention discloses a lightweight ultrahigh-strength high-modulus weldable aluminum-lithium alloy material and a preparation method thereof. The aluminum-lithium alloy comprises 3.20 wt%-3.49 wt% of Cu, 1.45 wt%-1.75 wt% of Li, 0.35 wt%-0.50 wt% of Mg, 0.20 wt%-0.40 wt% of Ag, 0.11 wt%-0.17 wt% of Sc, at least one of Zr, Mn, Ti, Hf and V with the total content not larger than 0.60 wt%, the balance Al and inevitable impurities, each impurity element is smaller than or equal to 0.15 wt%, and the sum of the impurity elements is smaller than or equal to 0.40 wt%. The preparation method of the alloy deformation processing material comprises the following steps: (1) manufacturing an aluminum-lithium alloy ingot blank; (2) homogenizing heat treatment; (3) thermally processing the ingot blank into a required processing material or a pre-processing material; (4) optionally reheating the pre-processing material, and processing the pre-processing material into a required processing material through cold deformation; (5) carrying out solid solution heat treatment on the processing material; (6) the machined material subjected to solution heat treatment is rapidly cooled to the room temperature; and (7) aging treatment is conducted on the machined material. The aluminum-lithium alloy material shows excellent comprehensive performance of low density, high strength, high modulus, weldability and the like.

The invention relates to a preparation process optimization method of a zirconium alloy material with high fretting wear resistance, which comprises the following steps: setting a chemical component optimization range of a zirconium alloy, including specific proportions of tin, iron, niobium, chromium and oxygen elements; establishing a computer simulation model, and predicting the wear volume, tribological stability and microstructure evolution of the material under the fretting wear condition; then, a complete optimization scheme is output based on the model optimization homogenization treatment temperature interval, the hot working deformation range, the cold working cumulative deformation degree and the annealing system; and finally, a preparation process sequence including smelting, homogenization treatment, hot working deformation, cold working deformation and final heat treatment is implemented, the zirconium alloy material with the equiaxed grain structure is prepared, and the wear resistance of the zirconium alloy material is verified through an experimental fretting wear performance test. Compared with the prior art, the method has the advantages that through systematic component design and process parameter simulation optimization, the material performance is remarkably improved, and the application reliability is enhanced.

The present application relates to the technical field of superalloys, and particularly relates to an 800°C-resistant high-strength and high-toughness nickel-based wrought superalloy and a preparation method therefor, and a turbine disc. The nickel-based wrought superalloy comprises: 10-12% of Cr, 14-16% of Co, 2.5-3.5% of W, 3.75-5% of Mo, 3.5-4.5% of Al, 2.5-3.1% of Ti, 3-3.8% of Nb, 0.01-0.08% of C, 0.005-0.05% of B, 0.01-1% of V, 0.025-0.075% of Zr, 0.005-0.3% of Si, 0.02-0.05% of Re, 0.001-0.08% of Sc, 0.001-0.08% of La, 0.001-0.05% of Ce, 0.001-0.05% of Nd, 0.001-0.15% of Mg, and the balance of Ni. In the present application, by rationally designing the components of the nickel-based superalloy in cooperation, and by coarsening a γ' phase by means of process regulation and control, the alloy achieves good hot working performance for engineering, and a turbine disc satisfying requirements can also be obtained by means of a heat treatment.

The invention discloses a casting shrinkage-proof device for hot-working casting, and belongs to the technical field of hot-working casting, by arranging a heating mechanism and a knocking mechanism, through vibration and disturbance generated by knocking, the static state of 21800 austenitic stainless steel metal liquid in a casting mold can be broken, and the shrinkage-proof performance of the casting is improved. According to the technical scheme, small bubbles originally attached to the interior or the wall face of liquid are disturbed and start to float upwards, meanwhile, vibration can improve the liquidity of the metal liquid, crank knocking is started in the process that the metal liquid is injected into a casting mold, knocking is still continuously kept after the metal liquid is injected, knocking power is from pushing of steam, and therefore the effect of improving the fluidity of the metal liquid is achieved. No other external force is needed in the process, and the knocking frequency is gradually reduced until the knocking frequency is completely stopped along with cooling of metal, weakening of power generated by steam and reduction of the casting mold temperature, so that the purpose of preventing the stability of metal liquid during condensation from being damaged by excessive knocking is achieved.

The invention discloses a multi-scale simulation method for a thermal compression deformation behavior of TC4 titanium alloy, and belongs to the field of metal material processing simulation. Comprising the following steps: 1, carrying out thermal compression experiments at different temperatures to obtain a deformed sample; 2, analyzing the grain orientation, orientation difference angle and texture evolution of the sample by using an electron back scattering diffraction technology; 3, constructing a crystal plasticity finite element model, and simulating a polycrystalline deformation process; 4, constructing a molecular dynamics model, and simulating phase change and dislocation evolution in thermal compression and cooling processes; and 5, based on a multi-scale simulation result, hot working parameters are optimized, dynamic recrystallization and a beta-to-alpha phase change path are regulated and controlled, and grain refinement and performance homogenization are achieved. The invention discloses a correlation mechanism of the microstructure and the mechanical property in TC4 titanium alloy thermal compression deformation, and provides a theoretical basis for optimization of a thermal processing technology of a high-performance titanium alloy component in the aerospace field.

The invention belongs to the technical field of high-temperature alloy heat treatment, and discloses a method for improving the hot working performance of a nickel-based high-temperature alloy for a molten salt reactor by combining pre-deformation and homogenization. The method comprises the steps that raw materials of the nickel-based superalloy for the molten salt reactor to be improved are sequentially subjected to vacuum induction melting, pouring and electroslag remelting refining treatment, and an electroslag remelting refined alloy cast ingot is obtained; the electroslag remelting refined alloy cast ingot is sequentially subjected to heating, heat preservation and pre-deformation treatment and is air-cooled to the room temperature, and a pre-deformed cast ingot is obtained; and the pre-deformed cast ingot is subjected to homogenization treatment and air cooling to the room temperature, and the method is completed. The method is a novel heat treatment process combining pre-deformation and high-temperature homogenization, the hot working performance of the alloy is optimized, the high-temperature alloy uniform in structure and excellent in mechanical property is obtained, and application in the field of high-temperature molten salt energy systems is met.

The invention relates to the technical field of parameter optimization, and discloses a titanium alloy die forging process parameter optimization method and system.The method comprises the steps that thermophysical parameters and mechanical property parameters of a titanium alloy blank are collected; constructing a hot working diagram based on the thermophysical parameters and the mechanical property parameters; identifying a stability region of the hot working diagram, and calibrating an instability parameter domain; performing quantitative decoupling on the critical characteristics of the instability parameter domain to obtain a cracking critical strain rate interval and a grain coarsening critical temperature interval; determining a quality index based on the cracking critical strain rate interval and the grain coarsening critical temperature interval; associating the quality indexes with equipment control parameters of the titanium alloy forgings to obtain a parameter-quality relation table; performing quality-oriented screening on the parameter-quality relation table, and outputting an optimized process parameter group meeting the comprehensive quality requirement of the titanium alloy forge piece; according to the method, the accuracy and efficiency of titanium alloy die forging process parameter optimization can be improved.

The invention belongs to the field of metal material processing, and particularly relates to a high-strength high-temperature nickel alloy welding material and a preparation method thereof.The high-strength high-temperature nickel alloy welding material comprises, by weight, 0.02%-0.05% of C, 0.10%-0.20% of Si, 18.0%-22.0% of Cr, 7.0%-9.0% of Fe, 4.0%-6.0% of Co, 2.0%-4.0% of W, 3.0%-6.0% of Mo, 0.005%-0.010% of B, 0.5%-2.5% of the total amount of Al and Ti, 0.05%-0.08% of Zr, 2.0%-2.5% of Nb, 0.30%-0.40% of RE, smaller than 0.005% of S, smaller than 0.005% of P, 1.5%-4.0% of modified boron nitride mixed powder and the balance Ni, the high-strength and high-temperature nickel alloy welding material is obtained through hot working, heat treatment, surface treatment and coating preparation, and the problem that in the prior art, deposited metal formed after welding of the high-strength and high-temperature nickel alloy welding material is poor in high-temperature mechanical property in a high-temperature environment can be effectively solved.

The invention discloses a high-Al and Ti difficult-to-deform high-temperature alloy hot working method, which avoids the melting risk of low-melting-point intermetallic compounds through high-temperature diffusion on one hand, and can realize effective and uniform diffusion of chemical elements on the other hand; on the other hand, through gradual heating number cooling forging, a high-temperature small-deformation forging process is carried out in an as-cast structure interval, and a low-temperature large-deformation process is adopted after the as-cast structure is crushed, so that an ideal uniform and fine recrystallized grain structure is finally realized, and the problems of high possibility of cracking, non-uniform forging structure, coarse grains and the like in a high-temperature alloy forging process are solved; and the high-quality requirement for use of downstream aero-engine components is met.

The invention discloses a preparation method of a titanium alloy cast ingot containing a copper element, and relates to the technical field of smelting. And selecting a titanium-copper intermediate alloy and / or a titanium-copper-aluminum intermediate alloy according to the raw material proportioning value of the copper-containing titanium alloy cast ingot. And uniformly mixing the sponge titanium and the intermediate alloy to prepare the consumable electrode. And the consumable electrode is prepared into a copper-containing titanium alloy cast ingot through vacuum consumable arc melting. On one hand, a titanium-copper intermediate alloy and / or a titanium-copper-aluminum intermediate alloy is selected as an adding mode of a copper element. And on the other hand, inert gas is introduced into the water-cooled copper crucible for vacuum consumable arc melting, so that the reduction of a molten pool is promoted. Under the combined action of the two aspects, the uniformity of the Cu element in the cast ingot is improved, the problem that the titanium alloy cast ingot has the beta spot defect in the hot working process due to copper element segregation is solved, and the application range of the titanium alloy material in the petrochemical industry, the aviation industry, the nuclear power generation industry, the hydrogen storage industry and the military industry is widened.

The invention belongs to the technical field of high-temperature alloy hot working, and particularly relates to a method for improving forging cracking of a GH4079 alloy and application of the method. According to the method, the structure evolution control in the forging process is realized by regulating and controlling parameters such as temperature and deformation in the hot working process, so that the hot working cracking tendency is reduced; through specific heating, heat preservation, forging deformation and cooling modes, the problem of cracking of the GH4079 alloy in the hot working process is remarkably solved. According to the method for improving the forging cracking of the GH4079 alloy, the alloy performance can meet the standard requirement, the defects that due to the fact that a large number of strengthening elements are added, the hot working performance is sharply reduced, and the forging cracking tendency is serious are overcome, the problems that the yield of the GH4079 alloy is low and the production cost is high are solved, and application of the GH4079 alloy is promoted.

The invention relates to a multi-pass pressure sintering-based high-quality preparation method of a low-cost multi-reinforcement-containing aluminum-based composite material, in particular to a multi-pass pressure sintering-based high-quality preparation method of a low-cost multi-reinforcement-containing aluminum-based composite material. The method aims at solving the problems that in the powder metallurgy preparation process of the aluminum-based composite material, the density is low, the mechanical property is poor, and interfaces between reinforcement bodies with different properties and a base body are not matched. The method comprises the following steps: 1, weighing a reinforcement material and an aluminum-containing material; 2, uniformly mixing the powder through a mechanical ball milling method or a V-shaped mixer; 3, the mixed powder is put into a mold; 4, performing cold pressing to prepare a prefabricated body; 5, multi-pass hot pressed sintering; and 6, demolding. The aluminum-based composite material is prepared at low equipment cost, and is high in density, excellent in mechanical property and good in hot working property. The aluminum-based composite material can be applied in various scenes through the matching of different types of reinforcements with different volume fractions and the aluminum-containing material.

The invention provides a digital production supervision method and system, belongs to the field of computers, and aims to solve the problems of high rework rate and low efficiency caused by the fact that optical inspection or chemical analysis often depends on cleaned quartz pieces due to incomplete cleaning of cracks and residual metal and the like and the optimal correction opportunity is missed once the problems are found. The method comprises the steps that in the stage of cleaning a hot-worked quartz workpiece, a cleaning formula is automatically matched based on information of the quartz workpiece, and the cleaning formula comprises a cleaning solution ratio and a cleaning time-temperature control curve; state change parameters of cleaning liquid in the cleaning tank are obtained in real time, wherein the state parameters of the cleaning liquid comprise conductivity and oxidation-reduction potential; and evaluating the quality defect of the quartz workpiece based on the state change parameter of the cleaning fluid.

The present invention belongs to the technical field of partition-type heat exchange, and specifically relates to an asymmetric flow channel detachable plate heat exchanger. The present invention comprises an outer shell, in which two or more groups of plate pairs are arranged in parallel with each other, and the gap between each two adjacent groups of plate pairs and / or the gap between the plate pairs and the inner wall of the outer shell constitutes an external flow channel for the heat exchange medium to flow, and the heat exchange medium to flow enters from the preset working medium inlet at the outer shell and is discharged from the working medium outlet; the plate pair is formed by bonding the plate surfaces of two sub-plate bodies, and each sub-plate body is provided with an "S"-shaped extending guide groove, so that after the sub-plate bodies are bonded, the guide grooves cooperate with each other to form an "S"-shaped internal flow channel for the heat exchange medium to flow; the heat exchange medium enters from the preset medium inlet at the outer shell and is discharged from the medium outlet. The present invention has the advantages of simple and quick cleaning and maintenance, and is suitable for use in working conditions with high viscosity working medium, easy scaling working conditions, and working conditions with a large ratio of the volume flow rates of the cold and hot working mediums.

The finned shell type heat exchanger comprises a heat exchange core arranged in a heat exchanger shell, a first end plate and a second end plate are fixedly arranged at two ports of the heat exchanger shell respectively, and a hot working medium inlet pipe and a hot working medium outlet pipe are arranged on the first end plate and the second end plate respectively; the heat exchange core body comprises a heat exchange pipe which is bent and twisted into a multi-layer space structure, the heat exchange pipe comprises a plurality of layers of heat exchange straight pipes which are arranged in parallel at intervals, the heat exchange straight pipes are arranged in the axial direction of the heat exchanger shell, and every two heat exchange straight pipes are communicated through a heat exchange bent pipe; annular fins are arranged on heat exchange straight pipes of the heat exchange pipes in a sleeving mode, a plurality of heat dissipation protrusions are arranged on the outer edges of the circumferences of the annular fins at equal intervals, and the heat dissipation protrusions are all arranged in the axial directions of the heat exchange straight pipes. Two ports of the heat exchange tube are respectively a cold working medium inlet and a cold working medium outlet; the heat exchanger has the advantages of realizing a heat exchange mode of parallel flow of cold and hot working media, reducing flowing resistance of the working media, and being large in heat exchange area, uniform in heat exchange, high in heat exchange efficiency and the like.

The Fe-Ni-based invar alloy comprises the following chemical components in percentage by weight: more than or equal to 0.01% and less than or equal to 0.5% of C, more than or equal to 0.01% and less than or equal to 0.25% of Si, more than or equal to 0.2% and less than or equal to 0.4% of Mn, more than or equal to 0.01% and less than or equal to 0.1% of P, more than or equal to 0.01% and less than or equal to 0.2% of S, more than or equal to 30% and less than or equal to 37% of Ni, more than or equal to 0.2% and less than or equal to 0.6% of Al, more than or equal to 0.2% and less than or equal to 0.4% of Mg and the balance of Fe and inevitable impurities. According to the invention, alloy components are optimized, and processing is carried out through a two-stage thermal deformation process, so that on the premise of ensuring the expansion performance of the alloy, the thermal processing performance of the alloy is further improved, and the thermoplasticity of the alloy is improved.

The invention provides a high-strength and high-plasticity matched titanium-zirconium-based alloy wire rich in multi-scale eutectoid compounds and a preparation method of the high-strength and high-plasticity matched titanium-zirconium-based alloy wire, and belongs to the technical field of titanium alloy materials. According to the method, a titanium-zirconium-based raw material containing eutectoid beta stable elements is adopted, and a cast ingot is prepared through vacuum consumable smelting; grains are refined and high dislocation density is introduced through staged phase change region hot working of beta-phase region cogging forging, beta-phase region first-heating-number rolling and alpha + beta two-phase region second-heating-number rolling; and after drawing and sizing, a horizontal electric straightening machine is used for rapidly and electrically heating to separate out a nanoscale eutectoid compound, solid solution water quenching is combined for inducing a submicron eutectoid compound, and finally a finished product is obtained through grinding and polishing. The tensile strength of the prepared wire is larger than or equal to 850 MPa, the ductility is larger than or equal to 15%, matching of high strength and plasticity is achieved, the process is continuous and controllable, batch production is adapted, and high-performance domestic raw materials are provided for oral implants.

The invention discloses a vacuum induction furnace smelting process for magnesium microalloying of H13 hot work die steel, and belongs to the technical field of ferrous metallurgy. According to the method, the contents of Al2O3, MgAl2O4 and MgO inclusions of the H13 hot work die steel with different Mg contents at different temperatures are calculated through software. And determining an interval in which the content of the MgAl2O4 inclusions accounts for the maximum so as to determine the optimal content of the added Mg. A vacuum induction furnace is adopted, after pure metal materials are melted and refined through operations such as vacuumizing, water feeding and electrifying, alloy materials are added for alloying, the content of Mg is controlled, and finally the alloy materials are cast in a preheated mold for casting. According to the method, Al2O3 in molten steel can be effectively converted into MgAl2O4, the solidification structure and liquation carbide of the H13 hot work die steel are effectively refined, and the segregation behavior of alloy elements is reduced.

The invention belongs to the field of high-temperature alloys, and particularly relates to a nickel-based wrought high-temperature alloy and a preparation method thereof. On the premise that chemical components of the nickel-based wrought superalloy are not changed, the dilemma of medium-temperature brittleness of the nickel-based wrought superalloy is relieved, and the adverse effect on the alloy performance caused by regulation and control of the content of microelements is avoided. The preparation method of a triple smelting process, hot working deformation, short-time annealing treatment and solid solution aging treatment is adopted; according to the nickel-based wrought superalloy, the grain size double-peak structure is constructed, meanwhile, a solid solution double aging treatment mode is adopted for promoting gamma'phase precipitation, the precipitation strengthening effect is improved, the tensile elongation of the prepared nickel-based wrought superalloy within the temperature range of 600-800 DEG C is larger than or equal to 15%, and further preferably, the tensile elongation can be larger than or equal to 20%; the yield strength of the alloy at 700 DEG C is not less than 1050 MPa, and the tensile strength is not less than 1500 MPa; and at 750 DEG C, the yield strength is not less than 1000 MPa, and the tensile strength is not less than 1400 MPa.

The invention discloses a high-strength high-temperature-resistant wrought magnesium alloy and a preparation method thereof, and relates to the technical field of magnesium alloy preparation. The magnesium alloy comprises the following components in percentage by mass: 8.0%-10.0% of Gd; 2.5% to 4.0% of Y; 1.5% to 3.0% of Zn; 0.3% to 0.8% of Zr; 0.1% to 0.5% of Nd; the total mass percentage content of the Gd and the Y is 11.5%-13.5%; zn / (Gd + Y) is equal to 0.15 to 0.3; the balance is magnesium and other inevitable impurity elements. The magnesium alloy disclosed by the invention has ultrahigh strength and plasticity and good hot working formability, can be used for preparing products with complex shapes through a simple process and a forging processing method, and is suitable for large-scale industrial production.

The invention discloses a biphase titanium alloy hot working deformation prediction method based on finite element simulation, and belongs to the technical field of titanium alloy hot working, a Voronoi mosaic algorithm is utilized to generate a volume element RVE containing an alpha phase and a beta phase in Digimate, and grid division is carried out based on Abaqus. An HCP crystal plastic model is adopted as an alpha-phase ontology model, and a BCC crystal plastic model or a J2 plastic model is adopted as a beta-phase ontology model. A cohesion unit is embedded in an alpha-phase interface and a beta-phase interface, and a temperature-dependent critical fracture energy degradation function is defined; the thermal activation energy is dynamically corrected, and the dislocation motion threshold value is dynamically adjusted. And finally, mapping the RVE response to the macroscopic model, and outputting simulation results of a stress-strain field, damage distribution and microstructure evolution. According to the method, the anisotropic deformation prediction precision of the double-phase titanium alloy is remarkably improved, the interface cracking prediction accuracy is improved by 30% or above, and the engineering adaptability is high.

The invention discloses a processing method for solving grain growth in a solution treatment process of a high-temperature alloy, which comprises the following steps of: 1, obtaining a basic bar by adopting a hot working mode, specifically, carrying out forging cogging on a steel ingot, then carrying out hot working on the steel ingot through a fast forging machine or a rolling mill to obtain the required basic bar, and reserving a certain deformation amount; 2, stress relief annealing is conducted on the basic bar obtained in the step 1, and water cooling is conducted immediately after heat preservation is completed; 3, the bar obtained in the step 2 is subjected to cold drawing; and 4, the finished bar obtained after cold drawing is subjected to solution treatment. According to the method, firstly, residual cold deformation of the bar in the hot working process is eliminated through high-temperature stress relief annealing, then the bar reaches the specified size through cold drawing machining, the cold deformation of the bar is larger than critical deformation, finally, after standard solution treatment, grain structures of all parts of the bar are uniform, and abnormal growth of grains does not exist. The process has the advantages of environmental protection, convenience, flexibility and low cost.

The invention belongs to the field of metal material processing, and particularly relates to a high-temperature heat-resistant nickel-based alloy welding wire and a preparation method thereof.The high-temperature heat-resistant nickel-based alloy welding wire comprises, by weight, 0.02%-0.05% of C, 0.10%-0.30% of Si, 20.0%-23.0% of Cr, 5.0%-7.0% of Fe, 3.0%-5.0% of Co, 2.0%-4.0% of W, 3.0%-6.0% of Mo, 0.005%-0.010% of B, 3.0%-5.0% of the total amount of Al and Ti, 0.05%-0.08% of Zr, 2.0%-2.5% of Nb, 0.30%-0.45% of RE, smaller than 0.005% of S, smaller than 0.005% of P, 0.05%-0.15% of modified graphene and the balance Ni, the high-temperature heat-resistant nickel-based alloy welding wire is obtained through hot working, heat treatment, surface treatment and coating preparation, and the problem that in the prior art, deposited metal formed after welding of the high-temperature heat-resistant nickel-based alloy welding wire is poor in high-temperature mechanical property in a high-temperature environment can be effectively solved.