569 results about "Rhenium" patented technology

Disclosed are a flux-cored welding strip and a welding flux used in combination for submerged arc welding of a duplex stainless steel, and preparation methods and use thereof. The flux-cored welding strip is composed of a stainless steel shell and a flux core powder, the flux core powder consisting of the following components: in percentages by mass, ferrochrome nitride: 0.70% to 1.0%, a chromium powder: 26% to 27%, a nickel powder: 4.5% to 5.5%, a molybdenum powder: 3.7% to 4.2%, a manganese powder: 2.55% to 2.65%, a copper powder: 1.45% to 1.55%, a ferrosilicon powder: 1.1% to 1.2%, a tungsten powder: 1.0% to 1.15%, a niobium powder: 0.25% to 0.35%, an aluminum powder: 0.35% to 0.55%, a rhenium powder: 0.35% to 0.40%, a lanthanum powder: 0.1% to 0.15%, and a balance being an iron powder.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for separating metal molybdenum and rhenium from a nickel-based superalloy electrochemical dissolving solution, which comprises the following steps: providing the nickel-based superalloy electrochemical dissolving solution, and adjusting the pH value to 0-1.5; the modified MTS9570 resin is used for adsorbing the nickel-based superalloy electrochemical dissolving solution to obtain a molybdenum-absorbed solution, then a sulfuric acid solution is used for leaching, then an ammonia water solution is used for desorption, and a molybdenum desorption solution is obtained; adjusting the pH value of the molybdenum-absorbed solution to 0.5-1.5, adsorbing with modified MTA1721 resin, leaching with a sulfuric acid solution, desorbing with an ammonium sulfate and ammonia water mixed solution, and desorbing with an ammonia water solution to obtain a second-stage rhenium desorption solution; and the molybdenum desorption solution and the second-stage rhenium desorption solution are subjected to evaporation concentration, crystallization, recrystallization and high-temperature hydrogen reduction respectively, and metal molybdenum and rhenium are obtained. According to the method for separating rhenium and molybdenum from the nickel-based high-temperature alloy electrochemical dissolving solution, the rhenium and molybdenum recovery rate and rhenium purity are improved, and the process is simple, convenient and practical.

The invention discloses a preparation method of high-rhenium and low-oxygen spherical tungsten-rhenium alloy powder, which comprises the following steps: proportioning tungsten powder and rhenium powder, adding into a ball mill for ball milling and mixing to obtain uniform composite powder slurry; the composite powder slurry is fed into a spray dryer to be subjected to spray granulation to form sphere-like alloy powder; and the spheroidized powder is subjected to plasma spheroidizing treatment to form the spherical tungsten-rhenium alloy powder. According to the preparation method disclosed by the invention, the tungsten-rhenium suspension slurry with uniformly dispersed components is prepared, and then granulation and spheroidization are carried out, so that the uniform state of the suspension is successfully solidified, oxygen can be reduced, impurities can be removed, and the spherical alloy powder with relatively large granularity and unlimited rhenium adding amount is prepared. The technical route flow is short, the process controllability is high, pilot scale production can be achieved, and the prepared tungsten-rhenium alloy spherical powder is high in density, sphericity degree and uniformity and low in oxygen content.

The invention provides multi-element alloy silver-free copper-based brazing filler metal and a preparation method thereof.The brazing filler metal comprises, by mass, 30%-40% of zinc, 4%-11% of manganese, 1%-4% of tin, 0.2%-0.6% of silicon, 0.2%-1% of rare earth elements and the balance copper, the rare earth elements comprise cerium, praseodymium and rhenium, and the mass ratio of cerium to praseodymium to rhenium is (0.8-1.2): (0.8-1.2): (0.6-1.0). According to the multi-element alloy silver-free copper-based brazing filler metal, the performance of a brazed joint is improved, the strength, toughness, fatigue resistance and the like of the joint are improved, and the reliability and stability of connection under various working conditions are ensured.

The preparation process comprises the following steps: dissolving ammonium dimolybdate, ammonium rhenate and water at a high temperature, then adding zirconium hydroxide, uniformly mixing, carrying out vacuum drying, carrying out two-stage hydrogen reduction on the obtained precursor composite powder, and carrying out vacuum drying to obtain the zirconium dioxide reinforced phase-containing molybdenum-rhenium alloy capable of inhibiting abnormal growth of crystal grains, thereby obtaining the zirconium dioxide reinforced phase-containing molybdenum-rhenium alloy capable of inhibiting abnormal growth of crystal grains. Zirconium oxide reinforced molybdenum-rhenium composite powder obtained after reduction is subjected to cold isostatic pressing, pressureless sintering and hot isostatic pressing to obtain zirconium oxide reinforced molybdenum-rhenium alloy, and then the zirconium oxide reinforced molybdenum-rhenium alloy is obtained through high-temperature rolling and recrystallization annealing treatment. According to the method, atomic-level mixing of molybdenum and rhenium is achieved through liquid-phase doping, the microstructure of the molybdenum-rhenium alloy is more uniform and fine due to addition of ZrO2, the recrystallization temperature is increased, and the phenomenon that sintered grains of the molybdenum-rhenium alloy grow abnormally is relieved. And by optimizing the annealing process and regulating and controlling the annealing mode, grains are rearranged to form a more uniform microstructure, abnormal growth of the grains is further inhibited, and the high-temperature tensile strength and the ductility of the molybdenum-rhenium alloy are improved.

The invention discloses a method for synthesizing an oxide dispersion strengthened molybdenum-rhenium alloy through a liquid-liquid doping process. The method comprises the following steps that S1, a molybdenum-rhenium mixed solution is prepared; s2, preparing a molybdenum-rhenium-doped mixed solution, namely dissolving precursor nitrate of an oxide into water, and then adding into the molybdenum-rhenium mixed solution; s3, heating treatment is conducted, specifically, the molybdenum-rhenium-doped mixed solution is mechanically stirred, then water is evaporated through heating to obtain a crystallized product, and then the crystallized product is filtered, dried and sieved to obtain composite powder; s4, calcining and thermal decomposition: calcining the composite powder to obtain pyrolysis powder; s5, thermal reduction is conducted, specifically, hydrogen is introduced into the muffle furnace, and the pyrolysis powder is reduced into oxide-doped molybdenum-rhenium alloy powder; and S6, bar preparation is conducted, specifically, the bar is obtained through cold isostatic pressing, high-temperature hydrogen sintering, forging and rotary swaging treatment. The oxide is stably dispersed in the molybdenum-rhenium alloy in a nanoscale form, and the performance of the alloy at the high temperature can be remarkably improved.

The invention relates to a quantitative evaluation method for the occurrence state of rhenium in sandstone-type uranium deposit, and the method comprises the steps: providing a to-be-evaluated sandstone-type uranium deposit, and making a sample wafer; analyzing the types and distribution conditions of minerals on the surface of the sample; carrying out EDS-SEM analysis on the sample wafer, outputting a back scattering image, further analyzing the mineral type and distribution condition on the surface of the sample wafer through the back scattering image, carrying out energy spectrum analysis on a bright white region in the back scattering image, obtaining the Re element content, and setting a region with the Re element content higher than 0.1% as a marked region; performing surface scanning energy spectrum analysis on the sample wafer to obtain an element spectrum diagram, and obtaining an Re element enrichment region; and quantitatively evaluating the occurrence state of rhenium according to the analyzed information. According to the method, firstly, the mineral type and the distribution condition of the surface of the uranium ore sample are analyzed, then the distribution condition of the Re element on the surface of the sample is analyzed, and the occurrence states of the Re element in different minerals can be known by comparing the two kinds of information one by one.

The invention belongs to the technical field of scattered metal recovery, and particularly relates to a recycling method of tungsten-rhenium alloy waste. The tungsten-rhenium alloy is a solid solution strengthened alloy which takes tungsten element as a matrix and consists of the tungsten element and rhenium element, and has the characteristics of high melting point, high strength and high hardness. As the price is high, it is very necessary to comprehensively utilize the tungsten-rhenium alloy waste. The invention discloses a recycling method of tungsten-rhenium alloy waste. Firstly, tungsten-rhenium alloy waste is cleaned, dried and smashed, and waste powder is formed; then dispersing the waste material powder into water dissolved with ammonium metatungstate and a surfactant; then, carrying out spray drying to form mixed powder; and finally, the mixed powder is subjected to roasting and hydrogen reduction, and tungsten-rhenium alloy powder with the metal rhenium content lower than the metal rhenium content in the tungsten-rhenium alloy waste is formed. Compared with an existing tungsten-rhenium alloy waste recycling method, the recycling method has the advantages of being simple in process, low in energy consumption, small in loss and good in uniformity.

The invention provides a method for selective copper deposition in copper smelting waste acid, and relates to the technical field of hydrometallurgy. The method for selectively depositing copper in the copper smelting waste acid comprises the following steps: mixing the copper smelting waste acid and a sulfur-containing organic compound to carry out copper precipitation reaction, and carrying out solid-liquid separation to obtain copper-removed liquid and a copper deposition product; sulfur-containing functional groups in the sulfur-containing organic compound comprise one or more of sulfonic acid groups, sulfydryl and thioether bonds. The sulfur-containing functional group in the sulfur-containing organic compound reacts with the copper ions in the reaction system for selective precipitation, so that the copper ions in the waste acid can be captured and removed, and the method has the advantages of high copper selectivity, high copper precipitation rate, fast reaction and mild conditions, does not carry rhenium element, can greatly reduce the loss of rhenium, and simplifies the process flow.

The invention discloses a preparation method for smelting a high-rhenium-molybdenum alloy pipe. The method comprises the following steps: 1, uniformly mixing Mo powder and Re powder, performing cold isostatic pressing, and sintering to obtain a high-rhenium-molybdenum alloy sintered blank; 2, carrying out vacuum electron beam smelting for many times to obtain a smelted high-rhenium molybdenum alloy cast ingot; 3, performing high-temperature extrusion combination and forging to obtain a smelted high-rhenium molybdenum alloy bar; 4, performing deep hole drilling, honing and machining treatment to obtain a smelted high-rhenium molybdenum alloy pipe blank; and 5, performing multi-pass high-temperature rolling, intermediate heat treatment, surface treatment and finished product heat treatment to obtain the smelted high-rhenium molybdenum alloy pipe. According to the method, repeated vacuum electron beam smelting is adopted, and repeated pressure machining such as high-temperature extrusion, forging and high-temperature rolling is combined, so that the purity and component uniformity of the smelted high-rhenium molybdenum alloy pipe are improved, the structure is uniform, the mechanical property is excellent, and higher dimensional precision and surface quality are obtained; the material is suitable for the fields of cladding pipes, heat pipes, medical implants and the like in nuclear reactors.

A multi-material structure includes a refractory portion with a metal or metal alloy of at least one of niobium (Nb), molybdenum (Mo), tantalum (Ta), tungsten (W), rhenium (Re), iridium (Ir), vanadium (V), and ruthenium (Ru). A structural portion is metallurgically joined with the refractory portion. The structural portion includes a titanium (Ti) alloy. At least one of the refractory and structural portions is additively manufactured.

The invention relates to the technical field of new energy, and provides a sandstone type rhenium ore favorable area determination method comprising the following steps: S1, obtaining distribution data and content data of uranium ore and rhenium ore, and establishing a rhenium ore distribution range model based on the distribution data and the content data; s2, dividing layers, and determining a main exploration target layer; s3, samples are collected in the target layer and tested and analyzed to determine the distribution range and content of uranium ore and the content of rhenium ore; and S4, delineating a rhenium ore favorable area based on the distribution range and content of the uranium ore, the content of the rhenium ore and the rhenium ore distribution range model. According to the method, the rhenium ore exploration cost can be effectively reduced, the success rate is increased, and the method has high application value.

A nickel-based alloy composition consisting, in weight percent, of: 1.5 to 4.5% aluminium, 1.1 to 3.4% titanium, 0.0 to 4.0% niobium, 0.0 to 5.2% tantalum, 0.9 to 6.6% tungsten, 0.0 to 3.0% molybdenum, 0.0 to 24.0% cobalt, 12.5 to 20.6% chromium, 0.02 to 0.15% carbon, 0.001 to 0.015% boron, 0.0 to 0.1% zirconium, 0.0 to 3.0% rhenium, 0.0 to 2.0% ruthenium, 0.0 to 3.0% iridium, 0.0 to 0.5% vanadium, 0.0 to 1.0% palladium, 0.0 to 1.0% platinum, 0.0 to 0.5% silicon, 0.0 to 0.1% yttrium, 0.0 to 0.1% lanthanum, 0.0 to 0.1% cerium, 0.0 to 0.003% sulphur, 0.0 to 0.25% manganese, 0.0 to 0.1 magnesium, 0.0 to 5.0% iron, 0.0 to 0.5% copper, 0.0 to 1.0% hafnium, the balance being nickel and incidental impurities, wherein the following equations are satisfied in which WAl, WTi, WNb, WTa and WW are the weight percent of aluminium, titanium, niobium, tantalum and tungsten in the alloy respectively 0.65≤0.3 WNb+0.15 W 3.6≤WAl+0.5 WTi+0.3 WNb+0.15 WTa≤5.7 WTa+0.92WW≤6.1.

The invention relates to the technical field of enrichment and separation of scattered metals, in particular to a method for selectively enriching and separating molybdenum and rhenium by using a zirconium-based adsorbent. According to the method, a zirconium-based metal organic framework material is used as a zirconium-based adsorbent, and molybdenum element enrichment, rhenium element enrichment, simultaneous molybdenum and rhenium enrichment or selective molybdenum and rhenium enrichment and separation are carried out from a solution to be treated. According to the method, the zirconium-based metal organic framework material is used as the zirconium-based adsorbent, the targets of efficiently enriching the molybdenum element from the solution, effectively extracting the rhenium element, enriching the molybdenum and the rhenium at the same time and effectively separating the molybdenum and the rhenium can be achieved through different paths, and the method has the advantages of being easy to operate, mild in condition and controllable.

The invention relates to the technical field of hydrometallurgy, and discloses construction of a green extraction system and application of the green extraction system in rhenium extraction. According to the specific scheme, the method comprises the following steps: synthesizing a plurality of functionalized ionic liquids, respectively preparing organic phases with a diluent according to a certain proportion by taking the functionalized ionic liquids as extraction agents, and forming a multi-element green extraction system by the organic phases and a water phase according to a set phase ratio; and rhenium is extracted under certain experimental conditions. The method is good in rhenium selectivity, the extraction rate can reach 99% or above, and compared with a traditional extraction mode, the adopted multi-element green extraction system is more environmentally friendly, higher in efficiency and beneficial to industrial development of rhenium extraction.

The invention belongs to the technical field of rhenium alloy materials, and particularly relates to a high-strength rhenium alloy material and a preparation method thereof. The rhenium alloy material is prepared from the following raw materials in percentage by mass: 12 to 24 weight percent of molybdenum, 6 to 9 weight percent of niobium, 2 to 5 weight percent of cobalt, 1 to 3 weight percent of tungsten, 0.5 to 1.2 weight percent of modified tantalum carbide, 3 to 6 weight percent of high-entropy rare earth and the balance of rhenium and other inevitable impurities. The modified tantalum carbide is prepared by the following preparation process: adding tantalum chloride, zirconium oxychloride and phenolic resin into a mixed solution of acetylacetone and n-butyl alcohol, stirring for 1-2 hours under a heating condition, dropwise adding ammonia water, continuously stirring for 0.5-1 hour, and drying to obtain a precursor; calcining the precursor, and cooling to obtain the modified tantalum carbide. The rhenium alloy prepared through the method has high hardness, good bending strength and excellent high-temperature mechanical property.

The invention relates to the technical field of non-ferrous metal hydrometallurgy, in particular to a method for separating molybdenum and rhenium from molybdenum smelting waste acid by using resin, which comprises the following steps: adding a phosphorus source into the molybdenum smelting waste acid, and then adjusting the acidity to an acid environment in which the hydrogen ion concentration is greater than or equal to 1mol / L; molybdenum and rhenium in the molybdenum smelting waste acid with the acidity adjusted are separated through weak-base anion exchange resin, and a rhenium product with the lower molybdenum impurity content is obtained. According to the method, the phosphorus source is added into the molybdenum smelting waste acid, so that phosphate ions are hydrolyzed from the phosphorus source, molybdenum can be effectively prevented from being adsorbed by the alkalescent anion exchange resin, the selectivity of the anion exchange resin to rhenium is greatly improved, and the rhenium recovery rate and the molybdenum-rhenium separation effect are improved; the problems that in the prior art, ion exchange resin is difficult to adapt to molybdenum-rhenium separation under the high molybdenum concentration, the rhenium recovery rate is low, the rhenium-molybdenum separation effect is poor, and a high-molybdenum-concentration solution cannot be treated are solved.

The invention discloses a method for improving the mechanical property of a molybdenum-rhenium alloy wire. The method comprises the steps that firstly, molybdenum powder and rhenium powder are mixed and then pressed and sintered in sequence, and a molybdenum-rhenium alloy blank is obtained; secondly, the molybdenum-rhenium alloy blank is sequentially subjected to electric arc melting and electron beam melting, and a molybdenum-rhenium alloy cast ingot is obtained; thirdly, the molybdenum-rhenium alloy cast ingot is subjected to hot extrusion and forging in sequence, and a molybdenum-rhenium alloy forged rod in the forging state is obtained; 4, drawing the molybdenum-rhenium alloy forging rod in the forging state for multiple times to obtain a molybdenum-rhenium alloy wire blank; and fifthly, the molybdenum-rhenium alloy wire blank is subjected to vacuum heat treatment, and the molybdenum-rhenium alloy wire is obtained. According to the method, pressing sintering, smelting, hot extrusion, forging and drawing processes are sequentially adopted, and a vacuum heat treatment annealing system is regulated and controlled, so that high strength is kept as far as possible on the premise of improving the room-temperature plasticity of the molybdenum-rhenium alloy wire, the purpose of optimizing the mechanical property of the molybdenum-rhenium alloy wire is achieved, the comprehensive mechanical property of the molybdenum-rhenium alloy wire is effectively improved, and the production cost is reduced. The process is simple, easy to operate and suitable for popularization.

High entropy alloy catalysts may be used for production of hydrogen. An example method of hydrogen production may include: introducing a hydrocarbon to a reactor, wherein the reactor contains therein a catalyst, wherein the reactor is substantially absent of oxygen and water, wherein the catalyst comprises a high entropy alloy and a catalyst support, wherein the catalyst is present in a form of a first plurality of particles, wherein the first plurality of particles is submicron-sized, wherein the high entropy alloy has an entropy, S, such that S≥12.47 J K−1 mol−1, and wherein the high entropy alloy comprises at least five of: iron, cobalt, manganese, nickel, molybdenum, copper, zinc, titanium, chromium, vanadium, aluminum, gallium, ruthenium, rhodium, palladium, silver, indium, tungsten, rhenium, iridium, platinum, gold, and bismuth; and reacting the hydrocarbon over the catalyst to produce solid carbon and hydrogen gas.

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

The invention provides a wet method for preparing high-solubility industrial molybdenum oxide from undried molybdenum concentrate containing copper, rhenium and carbon, and relates to the field of wet metallurgy. The method comprises the steps that undried molybdenum concentrate containing copper, rhenium and carbon, sodium sulfide and water are mixed and then subjected to ball milling, then solid-liquid separation is conducted, and ball-milled solids and ore grinding water are obtained; ball-milled solids and water are mixed to prepare to-be-treated ore pulp, the to-be-treated ore pulp is preheated and then subjected to pressurized oxidation treatment, and high-solubility industrial molybdenum oxide and leachate are obtained through solid-liquid separation; carrying out co-extraction on the leachate by adopting an extraction method to obtain strip liquor and raffinate, treating the strip liquor by adopting an acid precipitation method to obtain ammonium molybdate and acid precipitation post-liquor, carrying out ion adsorption on the acid precipitation post-liquor to separate and enrich rhenium, and crystallizing desorption liquor to prepare ammonium rhenate; performing sulfuration copper deposition on the raffinate by using sodium thiosulfate to obtain copper sulfide slag and liquid after copper deposition, wherein the liquid after copper deposition is dilute sulfuric acid; the carbon content of the molybdenum concentrate is 1-5%. According to the method, the high leaching rate of copper and rhenium and the high conversion rate of molybdenum are achieved, and the obtained leaching residues are the high-solubility industrial molybdenum oxide.

In a general aspect, a flexible cable communicates electromagnetic signals in a cryogenic system. In some aspects, the flexible cable includes a signal layer and a ground layer. The signal layer includes signal lines embedded in adhesive material. Each signal line includes a multilayer structure. The multilayer structure includes a layer of non-superconducting material and a layer of rhenium metal. The ground layer is laminated to the signal layer.

The invention discloses a method for extracting gallium, germanium and rhenium from coal processing byproducts. The method comprises the following steps: crushing and grinding coal processing byproducts, mixing the coal processing byproducts with chemicals, and baking at high temperature; after the coal processing byproducts are completely cooled, leaching and filtering the coal processing byproducts by using ultrapure water or a dilute acid solution to obtain a leaching solution containing gallium, germanium and rhenium; the method comprises the following steps: extracting, concentrating and evaporating to obtain a gallium-germanium-rhenium concentrated solution, preliminarily separating a germanium solution, a gallium solution and a rhenium solution respectively by a chlorination distillation method and a chemical precipitation method, and finally purifying the preliminarily separated gallium-germanium-rhenium solution to obtain high-purity gallium, germanium and rhenium products. By adopting the method, the extraction efficiency of the Gallium-Gallium-Gallium-Gallium is improved, the process is environment-friendly, the economic benefit is remarkable, and the comprehensive utilization of the coal associated solid waste is further realized.

The invention provides a reinforced molybdenum alloy wire and a preparation method thereof. The alloy wire comprises the following components in percentage by weight: 2-22 wt% of Re, 0.5-50 wt% of W, 0.1-1.0 wt% of La and the balance of Mo. The molybdenum alloy wire with rhenium and tungsten as alloy strengthening elements and rare earth lanthanum oxide as a second strengthening phase is prepared by combining powder metallurgy with a hot drawing process, and the alloy composition proportion, the powder metallurgy process and the drawing hot processing process are optimized. The reinforced molybdenum alloy wire prepared by the method has relatively high room-temperature and high-temperature strength, relatively low elastic modulus and good winding and bending performance, and is suitable for alloy wires for high-temperature springs.

Provided here are methods for producing a shaped metal-supported catalyst. One such method includes the steps of mixing a support hydroxide with an aqueous mixture of an active metal compound to form a malleable mixture of an active metal incorporated support hydroxide, passing the malleable mixture through a molding device to produce a shaped metal-supported wet catalyst; and drying and calcining the shaped metal-supported wet catalyst. The support hydroxide contains one or more of aluminium hydroxide, silica hydroxide, zirconia hydroxide, cerium hydroxide, titanium hydroxide, lanthanum hydroxide, gallium hydroxide, or niobium hydroxide. The active metal compound can be one or more of vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, technetium, and rhenium.

The invention discloses a preparation method of high-purity rhenium powder, and belongs to the field of metal processing.The method prepares a final product through first-stage gradient type high-temperature reduction treatment and second-stage low-temperature reduction treatment.The method is simple in production process, simple in manual operation step, low in production energy consumption, high in crystallinity of the produced product, low in oxygen content and suitable for industrial production. And the purity can reach 4N or above.

The invention discloses a thermocouple assembly and a preparation method thereof, relates to the field of aero-engine combustion chamber part testing, and is used for measuring the outlet temperature of a combustion chamber. The thermocouple assembly comprises a rhenium iridium sleeve, a temperature measuring assembly and an insulating part. The rhenium iridium sleeve comprises a first mounting hole; the wall body of the first mounting hole comprises a rhenium material layer and an iridium material layer attached to the outside of the rhenium material layer. The temperature measuring assembly comprises a plug and a thermocouple wire connected with the plug; the end, away from the plug, of the thermocouple wire is located in the first mounting hole of the rhenium-iridium sleeve. The end part of one end, far away from the plug, of the thermocouple wire abuts against the inner wall of the first mounting hole. The insulating part is located in the rhenium-iridium sleeve, and the insulating part is located between the inner wall of the rhenium-iridium sleeve and the thermocouple wire. According to the technical scheme, the temperature of the outlet of the combustion chamber can only be transmitted to the hot contact of the thermocouple wire through the rhenium-iridium sleeve, and accurate measurement of the temperature of the outlet of the combustion chamber is achieved.

The invention relates to the technical field of hot galvanizing, and particularly discloses hot galvanizing liquid as well as a preparation method and application thereof. The hot galvanizing liquid comprises the following raw materials in parts by weight: 55-60 parts of zinc; 30 to 35 parts of aluminum; 0.8 to 2 parts of silicon; 0.1 to 0.5 part of lead; 0.15-0.2 part of a rare earth element mixture; the rare earth element mixture is composed of rhenium, cobalt and antimony, and the weight part ratio of rhenium to cobalt to antimony is 1: (1.4-1.8): (0.9-1.3). The preparation method comprises the following steps: melting the aluminum in a production container, then adding the zinc for uniformly melting, then adding the silicon and the lead for uniformly melting, and finally adding the rare earth element mixture for uniformly melting to obtain the hot galvanizing liquid. After the hot galvanizing liquid is applied, adverse effects caused by other factors can be well made up, and a good binding force is shown between a plating layer and a base body.

The invention discloses a rapidly sintered rhenium plate and a preparation method thereof, and relates to the field of powder metallurgy. The preparation method comprises the following steps: putting a mold filled with rhenium powder into spark plasma sintering equipment, vacuumizing, introducing hydrogen-containing mixed gas, carrying out a gradient pressurization-pulse sintering process, heating the rhenium powder to a target temperature at a rate of 80-200 DEG C / min, carrying out heat preservation, synchronously applying axial pressure, controlling the pressure to be 8-12 Mpa when the temperature is less than 1000 DEG C, controlling the pressure to be greater than or equal to 15 Mpa when the temperature is greater than or equal to 1000 DEG C, and carrying out sintering for 2-3 hours; and cooling, demolding, reducing and annealing in a hydrogen atmosphere, and grinding to obtain the rhenium plate. Rapid sintering densification of pure rhenium is achieved through the spark plasma sintering technology, the temperature rising time is greatly shortened, step pressure rising is carried out before the nucleation stage of heating sintering, it is avoided that moving filling of rhenium powder is hindered by high pressure at the low temperature, size homogenization is promoted, and the prepared rhenium plate is good in uniformity and high in density and purity; and the oxygen content is low.

A machine tool, a machine component, a cutting blade, a drill bit, a grinding device, or a shredding / crushing device that is at least partially formed of a metal alloy that includes rhenium; said metal alloy includes a) at least 5 awt. % rhenium or b) at least 5 wt. % rhenium.