70 results about "Alloy electrode" patented technology

The invention discloses a high-entropy alloy electrode production management method and system based on quality tracing, and belongs to the technical field of production management, and the method specifically comprises the steps: endowing an identifier for an electrode production batch, and collecting a technological parameter curve; dividing application scenes and storing data in a classified manner by associating batch identifiers with terminal product models; obtaining the statistical failure life of the terminal product and extracting related process curves to form an analysis sample set; quantitative fluctuation characteristics of the process curve are extracted, and correlation analysis is carried out on the quantitative fluctuation characteristics and corresponding batches of life; defining a process characteristic value interval in positive correlation with the long life in a specific scene and generating a corresponding production control parameter set; and matching an application scene according to the order product model, and calling a corresponding parameter set to execute directional production. According to the method, closed-loop tracing and correlation analysis between process data and terminal service performance are constructed, so that the performance suitability and the production control accuracy of the high-entropy alloy electrode in subdivision application are improved.

The invention belongs to the technical field of tungsten alloy, and particularly discloses a tungsten alloy electrode material and a preparation method thereof.The tungsten alloy electrode material comprises, by weight, 0.1%-0.2% of lanthanum boride, 0.2%-0.5% of zirconium oxide, 0.2%-0.6% of boron carbide, 0.4%-0.8% of cerium oxide, 0.5%-1.2% of tantalum carbide, 1.4%-1.8% of modified carbon nanotubes and the balance tungsten powder. The lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes are added into the tungsten powder, under the combined action of the lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes, the tensile strength and the electrical conductivity are effectively improved, and the high-temperature stability tungsten powder has excellent high-temperature stability and wide application prospects.

The application discloses a water-based sodium ion battery equalization control method, equipment and device, relates to the water-based sodium ion battery control technical field, and comprises the following steps: collecting the operation data of each single battery in the battery pack, constructing a single battery state prediction model, and predicting the SOC change trend of the single battery in the future; according to the SOC change trend, the priority equalization object of the single battery is obtained, and the equalization scheduling of the priority equalization object is corrected based on the SOH change trend; according to the corrected priority, the energy of the priority equalization object is transferred to the energy storage element; based on the fuzzy game method, the energy in the energy storage element is released to the low-priority single battery; the application combines the SOC prediction, the SOH priority correction, the energy transfer and release method combining the fuzzy game and the reinforcement learning, and solves the problem that the single SOC of the battery pack is not balanced and the service life decline is difficult to consider.

A hydrogen storage alloy-based all-solid-state pH sensor is disclosed, comprising a counter electrode, a working electrode, a reference electrode, and a flexible substrate. The counter electrode is a platinum electrode, the working electrode is a hydrogen storage alloy electrode, the reference electrode is a silver / silver chloride electrode, and the flexible substrate is PET. Using the hydrogen-storage titanium-iron alloy electrode as the working electrode and an Ag|AgCl electrode as the reference electrode, the potential of the test solution is measured, and the pH value of the test solution is obtained through a standard curve. This invention explored the optimal ratio of titanium and iron elements through a series of experiments, enabling the sensor to simultaneously achieve both accuracy and stability. While ensuring good hydrogen ion response, optimal stability is obtained by adjusting the titanium-iron element ratio, making it suitable for long-term real-time online in vivo pH detection.

The application provides a heat treatment method of a Ni30 high-temperature alloy, and comprises the following steps: S1: producing an electrode bar: according to the chemical composition of the Ni30 alloy, metal raw materials are loaded into a non-vacuum induction furnace, current heating is carried out to melt at 1500-1600 DEG C, then pouring is carried out in an ingot mold, mold cooling is carried out, then demolding is carried out, and then air cooling is continuously carried out to room temperature, so that a solid solution electrode bar is obtained; S2: high-temperature solid solution: the solid solution electrode bar obtained in the step S1 is loaded into a heating furnace, heating is carried out to 1050-1150 DEG C, and then holding is carried out for 4-8 hours, then the furnace is discharged, and water cooling is carried out to room temperature, so that a solid solution electrode bar is obtained; S3: electroslag remelting smelting: the solid solution electrode bar obtained in the step S2 is subjected to electroslag remelting smelting, so that an electroslag ingot is obtained, and preparation is completed. Through the application, the problem that the Ni30 high-temperature alloy electrode bar prepared by the conventional heat treatment method has large stress, the process parameters are unstable in the electroslag remelting process, the quality of the electroslag ingot is unstable, and the material yield of forging is low is solved.

The utility model discloses a tungsten-copper alloy heater for sapphire crystal growth, and relates to the technical field of sapphire crystal growth equipment. The heating device comprises a mounting seat, a supporting frame is fixedly connected to the bottom of the mounting seat, a heating rod is arranged at the bottom of the mounting seat, a tungsten-copper alloy electrode is arranged at the top of the mounting seat, a clamping device is arranged at the top of the mounting seat, the clamping device comprises a sliding groove, the sliding groove is formed in the top of the mounting seat, and the tungsten-copper alloy electrode is arranged in the sliding groove. The inner wall of the sliding groove is fixedly connected with a mounting block. The birdcage heater made of the tungsten copper alloy is not prone to deformation, meanwhile, a good temperature gradient and a uniform and stable temperature field are provided for sapphire crystal growth, stable crystal growth is achieved, meanwhile, the service life of the heater is prolonged, equipment damage caused by improper operation can be reduced, and the service life of the heater is prolonged. And the maintenance cost caused by frequent misoperation is reduced.

The invention discloses multi-component alloy electrode plasma surface modification treatment equipment, and particularly relates to the field of plasma surface modification treatment.The equipment comprises a vacuum cavity, a box door is arranged on the outer side of the vacuum cavity, and an inflation mechanism, a vacuum mechanism and a waste gas treatment mechanism are arranged on the outer side of the vacuum cavity; a detection mechanism, an electrifying mechanism and a limiting mechanism are mounted in the vacuum cavity, and the limiting mechanism comprises a metal grid plate. Through the arrangement of the detection mechanism and the limiting mechanism, ions in the plasma are controlled to move within a certain range by utilizing an electric field force generated by bias voltage, so that the generation rate of the ions in the plasma is not influenced while gas in the vacuum cavity is exhausted, and meanwhile, according to the concave-convex condition of the surface of a material, the plasma can be accurately detected. The ion spraying rate and the ion generation rate are controlled, the working time of the device is shortened, and the working efficiency of the device is improved.

A kind of 690 alloy electrode for joule heating ceramic furnace and its using method, including the mechanical processing of 690 alloy electrode, laser welding and high temperature annealing treatment, the long-term working temperature of the electrode is 1150 DEG C, up to 1200 DEG C at most, the electrode has the advantages of good cooling effect, small stress, corrosion resistance, long service life etc.

The application relates to a noble metal active site enriched nanoporous amorphous alloy electrode material and electrolytic water catalytic application thereof. x Nb y N z The amorphous alloy thin strip is a precursor (wherein M is one or more than one of 3d transition metal elements Ni, Fe or Co, and N is one or more than one of noble metal elements Pt, Ir or Os), M and Nb elements are selectively removed by dealloying to obtain a nanoporous amorphous alloy electrode material composed of a surface nanometer noble metal enrichment layer, a middle nanoporous amorphous transition layer and an internal amorphous matrix layer, the electrode material has good mechanical bending flexibility, can be bent by 180 degrees at will without breaking, and is easy to prepare a self-supporting electrode device. The nanometer noble metal enrichment layer on the surface of the electrode material presents a multi-level pore structure composed of submicron 0.3-0.5 mu m honeycomb-shaped channels and superfine sponge-like 20-50 nm nanometer through holes, provides rich active sites, and exhibits excellent electrocatalytic performance: the hydrogen evolution overpotential is 17-30 mV at a current density of 10 mA / cm 2 The Tafel slope is 24-43 mV / dec, and the stable operation time can be more than 1000 hours under the condition of a current density of 500 mA / cm 2 The electrode material can be applied to the field of new energy such as electrolytic water catalytic hydrogen production.

The invention belongs to the technical field of molecular electronics, and particularly relates to a method for constructing a fixed-area molecular tunnel junction and an electrical property testing method.The method comprises the steps that a circular array mask is prepared, a gold target is deposited on the surface of a glass sheet, and a circular gold array is obtained; the gold-glass transparent array electrode is soaked in a molecular solution, when molecule self-assembly is completed, the surface is washed and dried, and the gold-glass transparent array electrode with the surface containing a self-assembly monomolecular film is obtained; preparing a gallium-indium alloy electrode; the gold-glass transparent array electrode is placed on an objective table, the tip of the gallium-indium alloy electrode is in contact with the circular gold array, the other end of the gallium-indium alloy electrode is led out to be in contact with the metal probe electrode, a current test loop is formed, and a fixed-area molecular tunnel junction is formed; compared with a traditional metal electrode, the gold-glass transparent array electrode has the advantage that adverse factors such as personal errors of molecular junction electrical property test results are effectively reduced.

The invention discloses a copper core tantalum alloy electrode and a preparation method thereof, and relates to the technical field of copper electrodes, and the copper core tantalum alloy electrode sequentially comprises a copper core, a zinc transition layer and a tantalum alloy coating layer from inside to outside; the preparation method comprises the following steps: S1, plating zinc on the surface layer of a copper rod to obtain a copper-zinc rod; s2, thermally sleeving the tantalum alloy seamless tube on the surface of the copper core rod to obtain a rod blank; and S3, drawing and rotary swaging are conducted on the bar blank, then low-temperature annealing is conducted, and the copper core tantalum alloy electrode can be obtained. The copper core tantalum alloy electrode can meet the requirements of strong acid scenes such as sodium sulfate and potassium sulfate preparation and sewage treatment, and is stable in structure and long in service life.

Embodiments of the present disclosure relate to a semiconductor device. The semiconductor device includes a bottom electrode, a magnetic tunnel junction (MTJ) stack on the bottom electrode, and a top electrode on the MTJ stack. At least one of the bottom electrode and the top electrode includes doped SiGeSn.

The invention provides a method for applying a low-concentration mixed acid electrolyte to electrochemical etching of a commercial alloy electrode, and belongs to the technical field of electrochemistry. In-situ surface etching is carried out on commercial alloy through mixed acid electrolyte, a surface micro-nano structure is formed, the surface area and the electrochemical active area of the commercial alloy are remarkably increased, and the method comprises the following steps that firstly, phosphoric acid, hydrochloric acid, sulfuric acid or nitric acid are mixed according to a specific combination and proportion, and a low-concentration mixed acid solution is obtained; and 2, using a double-cathode strategy in an electrolytic bath, fixing the pretreated commercial alloy in the electrolytic bath as an anode and electrodes on two sides as cathodes, adding the mixed acid electrolyte in the step 1 for electrochemical etching, taking out after the reaction is completed, cleaning, and carrying out vacuum drying. According to the method, the surface area and the electrochemical active area of the commercial alloy can be remarkably increased, a specific surface micro-nano structure is formed according to different commercial alloy types and etching parameters, and the method is suitable for hydrogen production application of alkaline electrolyzed water and electrolyzed seawater.

The application provides a high-entropy alloy electrode material and a preparation method and application thereof, wherein the preparation method comprises the following steps: S1, taking nickel salt, copper salt, iron salt, molybdenum salt and tungsten salt as raw materials, mixing the raw materials with an aqueous solution of ammonium sulfate, sodium dodecyl sulfonate and sodium citrate to obtain an electroplating solution; S2, performing electrodeposition treatment on a pretreated nickel substrate in the electroplating solution, and then performing water washing and drying treatment in sequence to obtain the high-entropy alloy electrode material. The high-entropy alloy electrode material has relatively high catalytic activity, can improve the reaction efficiency and reduce energy consumption when applied to the water electrolysis process, and the preparation method is simple, low in cost, high in safety, suitable for large-scale production and wide in industrial application prospect.

This invention belongs to the field of titanium alloy powder preparation technology, and relates to a low-cost method for preparing high-quality γ-TiAl alloy powder and its application. The method includes the following steps: Step 1: In an electrode block pressing mold, pure aluminum is distributed on both the upper and lower sides of the raw material for pressing into a γ-TiAl alloy electrode block. The raw material includes HTi particles. Step 2: The γ-TiAl alloy electrode block is welded into a consumable electrode, and the consumable electrode is repeatedly melted to obtain a γ-TiAl alloy ingot. Step 3: The γ-TiAl alloy ingot is machined to obtain a powder-making rod; the rod is then subjected to plasma rotating electrode atomization to obtain γ-TiAl alloy powder. This method can promote the full alloying of various raw materials during the VAR melting process, preventing the formation of infusible substances from HTi and other high-melting-point elements.

The application provides a micro light emitting device based on a tin alloy electrode application and a preparation method thereof, wherein a DBR structure layer is arranged on the surface of an epitaxial stack, the DBR structure layer comprises DBR reflection layers and stress buffer layers which are sequentially stacked along the surface of the epitaxial stack, and the DBR structure layer has a first through hole and a second through hole; a first electrode is deposited in electrical connection between the first through hole and the first type semiconductor layer and extends upward to the surface of the DBR structure layer, and the first electrode comprises a tin alloy electrode; and a second electrode is deposited in electrical connection between the second through hole and the second type semiconductor layer and extends upward to the surface of the DBR structure layer, and the second electrode comprises a tin alloy electrode. The surface of the LED chip adopts a tin alloy electrode structure, realizes a tin paste-free packaging mode, avoids abnormal problems such as tin connection caused by the low printing precision of the tin paste steel mesh, and simultaneously avoids problems such as the precise control of the steel mesh in the tin paste printing.

The invention belongs to the technical field of welding material design and optimization, and discloses a nickel-based alloy welding rod for a low-temperature service environment and a component design method of the nickel-based alloy welding rod. The welding rod comprises a pure nickel core wire and a coating with a specific formula, the coating comprises CaCO3, CaF2, Cr, Mo, Mn, Si-Fe alloy, Mo-Fe alloy, Nb-Fe alloy and other components, and the mass ratio Cr / Nb of chromium to niobium in deposited metal is controlled to range from 9.16 to 11.68. The invention further provides a corresponding component design method, Cr / Nb is identified as key parameters by constructing a BP neural network model and establishing a mapping relation between chemical components and mechanical properties, and the optimal range of Cr / Nb is reversely deduced through an optimization algorithm. The nickel-based welding rod with high strength (greater than or equal to 680MPa) and high toughness (impact energy greater than or equal to 70J) at the temperature of-196 DEG C can be rapidly and accurately designed, and the nickel-based welding rod is particularly suitable for welding 06Ni9DR and other low-temperature steel.

The invention is suitable for the technical field of electro-catalytic material preparation, and provides a preparation method and application of a foamy copper loaded CuGa2 alloy electrode, according to the method, three-dimensional foamy copper is used as a conductive framework, liquid gallium is introduced in an alkaline environment, and a CuGa2 / foamy copper composite structure with a strong interface coupling effect is formed through an in-situ alloying reaction. In the obtained electrode, a continuous metal-metal interface is formed between the CuGa2 alloy and the copper substrate, so that electron transmission and adsorption activation of NO molecules can be effectively promoted, and the reaction rate and selectivity of ammonia generation are remarkably improved. According to the method, the reaction condition is mild, high-temperature heat treatment is not needed, uniform growth of CuGa2 can be achieved under the low-energy-consumption condition, and excellent structural stability is kept. The prepared CuGa2 / foamy copper composite electrode shows high ammonia yield and excellent Faraday efficiency under the condition of 0.1 V (vs. RHE), and shows good catalytic stability and industrial application potential.

The invention discloses a medical pure water disinfection treatment method and a disinfection system, and belongs to the technical field of water treatment. The medical pure water disinfection treatment method comprises the following steps: filtering raw water to remove large-particle impurities in the raw water; carrying out photocatalytic disinfection treatment on the filtered water by adopting a CdSe / ZnS core-shell quantum dot modified TiO2 nanotube array, and irradiating the TiO2 nanotube array by adopting a visible light source; carrying out adsorption treatment on the water subjected to photocatalytic disinfection treatment by adopting a spiral ruthenium-iridium alloy electrode, and capturing free bacteria in the water and residual bacteria corpses after photocatalytic disinfection; feeding the purified water subjected to adsorption treatment into a water consumption point; the ruthenium-iridium alloy electrode is washed by adopting reverse pulse water flow, and washing water is directly discharged. With the adoption of the medical pure water disinfection treatment method and the disinfection system, the problems of low efficiency and poor effect of existing pure water disinfection treatment can be solved.

The invention relates to the technical field of capacitors, in particular to a patch type thin film capacitor which comprises a packaging body and a core arranged in the packaging body, and a first pin and a second pin are erected at the two ends of the packaging body respectively. The first pin and the second pin are electrically connected with a positive alloy electrode and a negative alloy electrode at the two ends of the core through a plug-in assembly respectively, and the plug-in assembly comprises first conductive rings which are arranged at the two ends of the packaging body and electrically connected with the positive alloy electrode and the negative alloy electrode. The first pin and the second pin are respectively provided with a clamping column which is electrically connected with the first conductive ring in a contact manner, two sides of one end of the packaging body are provided with bosses, and the bosses are provided with positioning adaptive assemblies which are matched with the plug-in assembly. The problems that in the prior art, the connection mode of the pin and the core electrode of the patch type thin film capacitor is not changed, so that the cost is increased, and the performance is affected due to the fact that the pin needs to be bent for adapting the welding angle are effectively solved.

The invention provides a solid electrolyte containing a benzene diimine lithium salt and an application of the solid electrolyte in a secondary lithium battery. The solid electrolyte provided by the invention comprises a conductive lithium salt, a polymer matrix, an additive and the like, wherein the conductive lithium salt is completely or partially composed of a benzene diimine lithium salt; or the additive is completely or partially composed of a benzene diimine lithium salt; or the conductive lithium salt and the additive are respectively and completely or partially composed of the benzene diimine lithium salt. The lithium benzene diimine salt can be oxidized on the positive electrode side to generate corresponding cyclohexadiimine, the cyclohexadiimine and high-activity metal lithium on the negative electrode side are further subjected to chemical reduction reaction, dendritic crystals and dead lithium on the surface of the metal lithium or a lithium alloy negative electrode are removed, and therefore the coulombic efficiency and long cycle stability of the solid-state lithium secondary battery are improved. Therefore, the solid electrolyte provided by the invention has the functions of removing dendritic crystals and dead lithium, can realize high-surface-capacity reversible lithium metal deposition, and can effectively prolong the cycle life of lithium metal and an alloy electrode thereof.

The invention relates to the technical field of alloy powder materials, and provides AgCuTi alloy powder and a preparation method thereof. According to the method, an alloy electrode bar is prepared in advance by adopting a powder metallurgy method (mechanical powder mixing, cold isostatic pressing forming and vacuum sintering), and then AgCuTi alloy powder is prepared by adopting a rotating electrode atomization method, so that the use of a smelting crucible and a heat preservation crucible in the powder atomization process is avoided, and the Ti element loss and pollution caused by the reaction of the crucible and an active element are completely eradicated; meanwhile, the AgCuTi alloy powder prepared through the method is uniform in component distribution, high in sphericity degree, low in oxygen content, high in fluidity, good in welding performance, high in purity and few in defects such as hollow powder and satellite powder, the brazing performance and mechanical performance of the alloy powder can be effectively improved, and wide application prospects are achieved.

A semiconductor device and methods forming the device is disclosed. The semiconductor device includes a bottom electrode, a magnetic tunnel junction (MTJ) stack on the bottom electrode, and a top elec

The invention discloses a double-phase high-entropy porous alloy electrode material for direct seawater electrolysis and a preparation method and application thereof, a precursor of the electrode material is an A-B double-component alloy, a component A of the precursor comprises three or more of active elements Fe, Co, Ni, Cu, Mn, Cr and Zn, and a component B of the precursor comprises one or more of second-phase forming elements Al, V and Mo. Through selective phase corrosion-electrochemical activation, an A dynamic active sacrificial phase / B steady state inert matrix phase synergistic system is constructed: the A dynamic active sacrificial phase is a relatively active FCC phase in a precursor, and the A dynamic active sacrificial phase can be leached / oxidized to form an oxyhydroxide active layer and construct an anion barrier layer; the latter phase is a BCC phase or a sigma phase and can be used as a self-supporting framework to provide Cl-corrosion resistance and structural stability. The material has a three-dimensional bicontinuous graded porous characteristic, and the catalytic activity and the corrosion-resistant stability are both considered in direct seawater electrolysis. The preparation process depends on smelting forming, electrochemical selective corrosion and electrochemical activation, the process is short, and large-scale production can be achieved.

The invention provides a Y2O3 net-shaped reinforced high-temperature alloy and a preparation method thereof, and belongs to the technical field of high-temperature alloy powder metallurgy preparation. The preparation method comprises the following steps: carrying out smelting treatment and refining treatment on a nickel-based alloy raw material, and pouring the treated alloy to form a matrix alloy electrode; preparing matrix alloy powder from the matrix alloy electrode by adopting an argon atomization method; mixing the matrix alloy powder with Y2O3 powder through a low-energy ball milling process to prepare precursor powder; the precursor powder is solidified and formed through a spark plasma sintering method, and a compact sintered green body is prepared; and carrying out solution treatment and water cooling on the compact sintered green body to obtain the Y2O3 net-shaped reinforced Ni-based high-temperature alloy. The oxide reinforced high-temperature alloy with good compactness and structure uniformity can be obtained, and the high-temperature structure stability and oxidation resistance of the material are remarkably improved.

The application relates to the technical field of electrode materials, in particular to a bismuth-based alloy composite electrode material based on biomass charcoal and a preparation method thereof, which comprises the following steps: after pretreatment of waste biomass materials, KOH is used for activation and pore making, and porous biomass charcoal is obtained after acid pickling and drying; the porous biomass charcoal, basic bismuth carbonate, tin oxalate, copper oxalate and magnesium powder are mixed to obtain mixed powder, anhydrous ethanol is added to the mixed powder for grinding to a paste, and a precursor mixture is obtained after vacuum drying; the precursor mixture is subjected to a magnesium thermal reduction reaction in an argon atmosphere, the reaction product is cooled to room temperature, and acid pickling and drying are carried out to obtain the bismuth-based alloy composite electrode material based on biomass charcoal. The application solves the problems of large volume expansion and poor conductive stability of the existing bismuth-based alloy electrode, and realizes resource utilization of waste biomass.

The application is suitable for the field of material preparation, and provides a copper-gallium alloy electrode preparation method and application in the field of electrocatalysis.The copper-gallium alloy electrode preparation method comprises the following steps: step 1: immersing foamed copper and gallium-indium liquid alloy into an aqueous solution of sodium hydroxide, and keeping the two in contact; step 2: introducing direct current into the system composed of foamed copper, gallium-indium liquid alloy and aqueous solution of sodium hydroxide; step 3: ultrasonicating the foamed copper obtained in step 2; and step 4: treating the foamed copper obtained in step 3 at a constant potential for a certain time.The application forms a dense copper-gallium alloy layer on the surface of foamed copper by means of infiltration reaction-physical removal-electrochemical removal, using foamed copper and gallium-indium liquid alloy as raw materials.The copper-gallium alloy electrode prepared by the application has excellent electrocatalytic nitrate reduction performance, and the ammonia yield reaches 10 mg / h.

The application discloses an aluminum alloy electrode material and a preparation method thereof. Raw materials of the aluminum alloy electrode material include magnesium, tin, indium and aluminum. The preparation method of the aluminum alloy electrode material comprises the following steps: melting the raw materials to obtain aluminum alloy ingots according to mass percentage; performing heat treatment on the aluminum alloy ingots; performing rolling on the aluminum alloy ingots after the heat treatment; and obtaining aluminum alloy electrode plates with a target thickness. The aluminum alloy electrode material adopts specific alloy components, alloy proportions and a processing process to alloy the metal aluminum, so that the aluminum alloy electrode material has higher discharge voltage and higher electrode utilization rate when used in an aluminum alloy battery, the occurrence of a side reaction is reduced, the discharge energy of a unit mass electrode is improved when the aluminum alloy electrode is used, and the aluminum alloy electrode plate has better processing consistency compared with the same type of aluminum alloy electrode plate.

The invention relates to a molybdenum-rhenium alloy thin-wall pipe introduced with multiple times of extrusion and a preparation method, and aims to solve the problems of small extrusion ratio, non-uniform grain size and mixed crystal phenomenon in the existing molybdenum-rhenium alloy pipe preparation process. The preparation method comprises the following steps: S1, uniformly mixing molybdenum powder and rhenium powder, pressing and sintering to obtain a molybdenum-rhenium alloy electrode; s2, vacuum electron beam melting is conducted on the molybdenum-rhenium alloy electrode, and a molybdenum-rhenium alloy melting ingot blank is obtained; s3, the molybdenum-rhenium alloy smelting ingot blank is extruded and annealed at least twice, and an extruded bar blank is obtained; s4, processing the extruded bar blank to obtain a pipe blank; s5, the pipe blank is subjected to multi-pass warm rolling, and a rolled pipe blank is obtained; and S6, the rolled pipe blank is subjected to aftertreatment, and the molybdenum-rhenium alloy thin-wall pipe is obtained. According to the method, through the innovative process of replacing forging with extrusion, multiple times of extrusion are introduced to replace traditional forging, crystal grains are fully refined, the large extrusion ratio is achieved, and meanwhile the molybdenum-rhenium alloy thin-wall pipe with uniform and clear crystal grains and excellent mechanical performance is prepared.

The invention belongs to the technical field of gamma-TiAl alloy cast ingot preparation, and relates to a gamma-TiAl alloy cast ingot containing high-melting-point alloy elements and a VAR preparation method of the gamma-TiAl alloy cast ingot, and the VAR preparation method specifically comprises the following steps: step 1, determining the components of a pre-alloy electrode bar according to the target components of the gamma-TiAl alloy cast ingot, and determining the size of the pre-alloy electrode bar and the size of a matched aluminum pipe; 2, a pre-alloyed cast ingot is prepared through a VAR smelting method; step 3, processing the pre-alloyed cast ingot into a pre-alloyed electrode bar; step 4, assembling the pre-alloyed electrode bar and an aluminum tube to obtain a composite electrode; and 5, the composite electrode is smelted through a VAR smelting method, and the gamma-TiAl alloy cast ingot is prepared. According to the method, the problems that an existing gamma-TiAl alloy ingot containing high-melting-point alloy elements is difficult to prepare, high in cost, low in production efficiency and the like can be solved, and the prepared ingot is uniform in component and free of any infusible substance.