508 results about "Hot working" patented technology

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 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 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 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 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 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 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 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 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 discloses a preparation method of a novel low-alloy steel solid welding wire. The preparation method comprises the following steps of S1, raw material smelting, S2, a hot working stage, S3, a cold working stage, S4, surface treatment and S5, quality detection. During raw material selection, C-Mn-Si is adopted as a basic alloy, the content of C is 0.06-0.12%, the content of Mn is 1.2-1.6%, then a Ti-B microalloy is added, the hardenability is improved, the O / N content is limited at the same time, then a two-stage refining process combining vacuum induction melting and electroslag remelting is adopted, the melting temperature, time and refining slag system components are regulated and controlled, and the hardness of the alloy is improved. The method comprises the following steps: preparing a copper plating solution through equipment, deeply removing harmful impurities such as S and P, promoting floating and size refinement of inclusions by applying an electromagnetic stirring technology, remarkably improving the purity of a metal matrix, thereby improving the purity of raw material smelting, proportioning the copper plating solution through the equipment, setting the parameters of the copper plating equipment to be 10-15A / dm in current density and 2-3mu m in plating thickness, and carrying out a copper plating process on a welding wire.

The invention relates to the technical field of seamless steel tube processing, and provides a processing technology of a high-temperature-resistant seamless steel tube, which comprises the following steps: blank preparation and pretreatment: preparing a stainless steel blank with the Cr content of more than or equal to 10.5% by adopting an electroslag remelting smelting technology, and carrying out high-temperature homogenization diffusion annealing on a cast ingot, and hot working forming is conducted, specifically, the pretreated blank is heated to 1080-1200 DEG C, perforating rolling is conducted through a three-roller skew rolling perforating machine, a thick-wall tubular billet is formed, online temperature control cooling, warm rolling and online solution treatment are conducted after perforating, and warm rolling is conducted on the thick-wall tubular billet within the range of Ac1 to 980 DEG C. By matching the electroslag remelting and high-temperature homogenization diffusion annealing process, element segregation and internal tiny defects of a casting blank are effectively reduced, the structure uniformity and purity of the blank are remarkably improved, the problem of insufficient structure uniformity in an existing process is solved from the source, and a basic guarantee is provided for excellent high-temperature performance and corrosion resistance of a product.

The invention relates to a preparation method of a nickel-based alloy for a high-temperature ultrahigh-pressure reaction kettle, which comprises the following steps of: preparing a high-quality and high-purity nickel-based high-temperature alloy ingot by adopting a triple smelting process of (1) vacuum induction melting, (2) electroslag remelting and (3) vacuum consumable remelting; (4) homogenizing heat treatment is conducted, specifically, heat preservation is conducted for 24-48 h at the temperature of 1100- 5) hot working: keeping the temperature of the cast ingot at 980-1150 DEG C for 2-6 hours, and forging the cast ingot into a finished forge piece; and (6) heat treatment is conducted, specifically, after solution treatment is conducted on the forged piece at the temperature of 920-1050 DEG C, stabilization treatment is conducted at the temperature of 810-860 DEG C, heat preservation is conducted for 8-12 h at the temperature of 720-760 DEG C, then furnace cooling is conducted to the temperature of 620-650 DEG C, heat preservation is conducted for 8-12 h, by the adoption of the method, the purity and quality of the alloy cast ingot can be remarkably improved, precipitation of harmful phases is reduced, the structure performance of the alloy forged piece is optimized, the reliability and using performance of the alloy forged piece for the reaction kettle are improved, and the reaction kettle can be used for a long time under the high-temperature and ultrahigh-pressure complex working conditions.

Provided is an alloy material with which it is possible to obtain high creep strength and excellent welding hot cracking resistance and hot workability. This alloy material contains, in mass%, 0.050 to 0.100% of C, 1.00% or less of Si, 1.50% or less of Mn, 19.00 to 23.00% of Cr, 30.00 to 35.00% of Ni, 0.010% or less of N, 0.15 to 0.70% of Al, 0.15 to 0.70% of Ti, 0.0001 to 0.0030% of B, 0.0010 to 0.5000% of Nb, 0.01 to 1.00% of Mo, and 0.0001 to 0.0200% of Ca, with the remainder being Fe and impurities, and satisfies formula (1) and formula (2), and also satisfies formula (3) when B is less than or equal to 0.0010%. 0.60 lt, 0.60 lt; al + Tilt; 1.20 (1), 3.3-41 C-Si + 2Mo + 3Ti + 245B-12Nb < = 2.00 (2), and 0.4 + 67 C + 1.3 Si + 5.5 Mo + 5.2 Ti + 13.4 Nb < = 8.25 (3).

The present application belongs to the technical field of steel smelting and hot working, and particularly relates to a microstructure uniformity regulation method for hot work die steel, comprising: obtaining the hot work die steel through initial smelting by an electric furnace, LF refining purification, VD refining degassing and impurity removal; the present application adopts special smelting, forging and heat treatment processes, so that the prepared product has excellent microstructure uniformity, no banded structure and no mixed crystal structure in the finished product structure, and the carbide is uniformly distributed in a dispersion state; according to the annealing structure rating, annealing structure banded segregation rating and heat treatment structure rating diagrams of the North American Die Casting Association NADCA #207-2016 standard, AS1 level, SA1 level and HS1 level can be respectively reached. The hot work die steel of the present application has excellent wear resistance and impact toughness. The die prepared from the material has a longer service life and can better adapt to the demand of modern industrial production for high-end dies.

The application provides a light steel hot deformation constitutive optimization method based on a neural network and precipitation strengthening coupling, and relates to the technical field of metal material hot working and constitutive model establishment; the neural network model automatically learns the nonlinear relationship among the rheological stress, temperature, strain rate and strain, and introduces a precipitation strengthening correction term in a stress prediction term, which is used for representing the competition effect of cutting mechanism and bypass mechanism; through engineering design of precipitation characteristic parameters, base training and strengthening parameter calibration are performed on the neural network model; a damage function optimization algorithm based on a dislocation slip mechanism is further introduced, so that the double constraints of prediction accuracy and physical consistency are realized; the application can realize high-precision flow stress prediction of light steel under different deformation temperatures and strain rates, significantly improves the generalization and physical interpretability of the model, and provides a new modeling approach and theoretical support for constitutive modeling and microstructure and performance control of light steel and other precipitation strengthening type high-strength alloys.

The application discloses a kind of based on DC pulse's enhanced toughening Ti-6Al-4V alloy and preparation method thereof.Method includes that hot working state Ti-6Al-4V alloy plate is cut into tensile specimen, after mechanical grinding, ultrasonic cleaning, constant temperature drying, by power connection DC pulse processing, by relay accurately control electric pulse action duration, by changing a series of electric pulse action duration and current density, obtain the enhanced toughening Ti-6Al-4V alloy under different DC pulse conditions, and obtain the comprehensive mechanical properties of Ti-6Al-4V tensile specimen.By the efficient DC pulse processing method provided by the application, the extremely short power cycle of microsecond level, and simple and convenient operation, significantly improve the yield strength, tensile strength and elongation of Ti-6Al-4V alloy.

This application relates to a production mold and method for irregularly shaped frame mounting edges, belonging to the technical field of forging and hot working. It includes a base, a lower mold, a left mold, a right mold, and an upper mold. The lower mold is disposed on the base. The left and right molds slide horizontally at the ends of the lower mold away from the base. When the left and right molds are closed, the cavity formed matches the shape of the forging. The left and right molds cooperate to forge and shape the shape of the forging. The upper mold slides vertically and has an expanding mold and a shaping mold facing upwards. The expanding mold includes an expanding section and a forming section. The size of the expanding section decreases sequentially away from the forming section. The shape of the forming section matches the inner shape of the forging. The expanding mold forges and shapes the inner shape of the forging. The shaping mold is used to press and shape the upper surface of the forging, thus forming the forging. This application has the effect of reducing the number of forging passes for irregularly shaped frame mounting edges while improving the product qualification rate after die forging.

The invention provides a high-strength corrosion-resistant iron-chromium-aluminum alloy and a preparation method thereof, and relates to the technical field of iron-chromium-aluminum alloys, the high-strength corrosion-resistant iron-chromium-aluminum alloy comprises, by mass, 19-25% of Cr, 8.5-11% of Al, 0.3-0.8% of Nb, 0.1-0.4% of Ti, 0.2-0.6% of Si and the balance Fe and limited impurities, a dispersion strengthening phase is formed by compositely adding Nb and Ti, and the oxidation resistance is improved by synergistically optimizing the proportion of Cr and Al; the preparation method comprises the steps of raw material pretreatment, vacuum melting and refining, directional solidification, homogenizing annealing, hot working and solid solution-aging heat treatment, and process parameters are accurate and controllable. By optimizing the proportion of Cr and Al and compositely adding Nb and Ti, the pain point that strength and corrosion resistance are difficult to cooperate is solved; and meanwhile, homogenizing annealing, directional solidification optimization and heat treatment parameters are added in the process, segregation and internal stress are eliminated, the performance of the prepared iron-chromium-aluminum alloy comprehensively exceeds that of a conventional iron-chromium-aluminum alloy, and the prepared iron-chromium-aluminum alloy is adaptive to high-end scenes and high in stability.

The application provides a large height-diameter ratio titanium-aluminum alloy blank manufacturing device and method. The method comprises the following steps: S10, designing a blank: designing a forging according to a target titanium-aluminum alloy blade; the forging comprises a blade root part, a blade body part and a blade crown part; presetting the shape and size of the blank according to the forging; S20, obtaining a forming die and a raw material: preparing the forming die according to the preset shape and size of the blank in step S10, and selecting a bar; S30, adopting the forming die to perform upsetting forming on the bar to obtain the blank; and performing hot working on the blank to obtain a target titanium-aluminum alloy blade forging. The large height-diameter ratio titanium-aluminum alloy blank manufacturing method and device can solve the problems of blank instability of a large height-diameter ratio metal bar and high mold cost caused by titanium-aluminum alloy isothermal forming, realize non-isothermal forming of a large height-diameter ratio titanium-aluminum alloy special-shaped part, improve material utilization, reduce waste of titanium-aluminum alloy material, and effectively reduce the machining cost of the blade.

The application discloses an integrated air-liquid dual-purpose heat exchanger, which is characterized by comprising a transversely arranged air-cooled heat exchanger and a vertically arranged liquid-cooled heat exchanger close to a hot working medium outlet end of the air-cooled heat exchanger; a hot working medium inlet is arranged at one end of the air-cooled heat exchanger far from the hot working medium outlet; and a hot working medium channel for sequentially flowing through the air-cooled heat exchanger and the liquid-cooled heat exchanger is communicated between the hot working medium inlet and the hot working medium outlet. The application combines the commonly used air-cooled heat exchange mode and the liquid-cooled heat dissipation mode, so that the heat exchanger can cope with more working conditions, and can be switched under different environmental temperatures, thereby guaranteeing the best heat dissipation effect.

The invention provides an aluminum alloy low segregation melt treatment method, and relates to the technical field of material segregation processes. The method comprises the following steps: S1, raw material acceptance and pretreatment, and then raw material smelting and degassing; s2, adding a composite refiner; s3, carrying out electromagnetic stirring and ultrasonic cooperative treatment; s4, carrying out stepped solidification; s5, detecting the quality of the cast ingot, and shunting unqualified products; s6, performing ultrasonic-assisted hot working; s7, electromagnetic-ultrasonic synergistic heat treatment; and S8, post-treatment and finished product quality inspection. Wherein in the step S3, an electromagnetic field applying device is arranged on the periphery of the smelting furnace to carry out electromagnetic stirring on the melt, a plurality of ultrasonic transducers are arranged in the circumferential direction of the smelting furnace or a plurality of probes with the ultrasonic transducers are prepared, and ultrasonic waves are applied to the melt. Refiner adding, electromagnetic stirring and ultrasonic treatment are integrated in the melt stage, nucleation strengthening, melt homogenization and dendritic crystal pre-crushing are synchronously completed through control of a directional ultrasonic field and a graded magnetic field, the process efficiency is improved, and the segregation control effect is remarkable.

This invention relates to the field of metallic materials technology, specifically to a high-temperature alloy for chloride molten salt heat transfer and storage, its preparation method, and its applications. Based on the total weight of the high-temperature alloy, it comprises: 20%–25% Cr, 25%–30% Fe, 1.8%–3.0% Al, 0.1%–0.5% Si, 1.5%–2.5% Ti, 3%–5% Mo, 0.5%–1% W, 0.5%–1% Mn, 0.01%–0.05% Hf, <0.1% C, and the balance Ni. The high-temperature alloy provided by this invention possesses good corrosion resistance, meeting the corrosion resistance requirements of chloride molten salt environments at 400℃–750℃. Furthermore, this high-temperature alloy also exhibits good mechanical strength, weldability, and cold and hot working properties, making it easy to process into plates and pipes.

This invention belongs to the field of forging hot working and relates to a forging method for a cross-shaped TC32 titanium alloy die forging. The method includes: selecting a bar stock as a billet; upsetting the bar stock and shaping it into a cuboid; reversing the direction of the billet and elongating it along its short side, shaping it into an irregular octagonal cross-section cube as the billet; on the cube, the surface corresponding to the web of the cross-shaped TC32 titanium alloy die forging is larger than the surface corresponding to the high ribs of the cross-shaped TC32 titanium alloy die forging, and the web material is also more than the high rib material; vertically placing the billet into a pre-forging die along its height direction for upsetting to obtain a cross-shaped pre-forging; the cross-shaped pre-forging has lugs at both ends; the larger lug is used to form the high ribs with bosses, the smaller lug is used to form the high ribs, and the middle of the pre-forging is used to form the web; rotating the pre-forging 90° and placing it with the larger lug facing upwards into the final forging die for cross-shaped reversing forging.

The invention discloses a heat treatment process of an M62 material for an X-ray tube bearing. The heat treatment process comprises the following steps: S1, preparing the M62 material; s2, the M62 material is subjected to high-temperature annealing process machining, and the M62 material subjected to high-temperature annealing process machining is subjected to turning treatment to obtain a bearing turning part; s3, the bearing turning part is subjected to third-time preheating machining, and the bearing turning part subjected to third-time preheating machining is subjected to quenching heat preservation treatment; s4, on the basis of the step S3, isothermal quenching machining is conducted on the bearing turning part subjected to quenching and heat preservation treatment; and S5, based on the step S4, low-temperature tempering machining is conducted on the bearing turning part subjected to isothermal quenching machining, and high-temperature tempering machining is conducted on the bearing turning part subjected to low-temperature tempering machining twice. The method solves the problems of low cutting efficiency caused by high annealing hardness after heat treatment of the traditional M62 material, high material performance dispersity and shortened service life caused by non-uniform heating of the internal structure of the alloy, and overhigh hardness and insufficient toughness after heat treatment.

According to the intelligent optimization method for the hot working technological parameters of the high-thermal-conductivity aluminum alloy component, multi-dimensional input feature data of a target component are obtained; based on a chemical component spectral analysis report of a target aluminum alloy, mass percent data of key alloy elements are extracted to form a vector, and the key alloy elements comprise, by mass percent, 0.05%-0.50% of Si, 0.20%-1.00% of Mg, 0.50%-2.00% of Fe, 0.05%-0.25% of B and 0.05%-0.40% of rare earth element RE; according to the technical scheme, silicon (Si is smaller than or equal to 0.5%) and the total amount of alloy elements are strictly controlled, the heat treatment process is optimized, the heat conductivity of the material is stably larger than or equal to 200 W / m.K and remarkably higher than that of a conventional die-casting aluminum alloy (generally smaller than 150 W / m.K), the heat dissipation requirement of a high-end precise device can be met, and the service life of the die-casting aluminum alloy is prolonged. The extremely low silicon content of the aluminum alloy fundamentally eliminates the defects of black spots, lime or uneven coloring and the like caused by silicon phase enrichment during anodic oxidation, a colorful oxidized surface which is uniform and bright in color and compact in film layer can be obtained, and the attractiveness and the additional value of a product are greatly improved.