486 results about "Argon gas" patented technology

The present application relates to the technical field of plasma catalysis, and particularly relates to a method for catalytically converting methane and water into methanol and hydrogen under plasma conditions, a device used and a catalyst used. The bubbling-fluidized plasma reactor of the present application is formed by connecting a bubbling corona discharge plasma reactor at the lower part and a fluidized bed dielectric barrier discharge reactor at the upper part in series, and is filled with a catalyst in a discharge channel. Methane mixed with argon is preheated and then enters a gas bubbling column from a raw material inlet. A corona discharge is formed in the gas bubbles by a bubbling tip to generate plasma, so that the methane-water is preliminarily converted in cooperation. The gas after the preliminary conversion is introduced into the discharge channel to react under the action of the catalyst, and hydrogen and methanol are obtained by conversion.

This invention relates to the field of vacuum melting technology, and in particular to a vacuum melting furnace for copper alloys and its ultrasonic-assisted melting method, comprising the following steps: placing copper alloy raw materials into a crucible and drawing a vacuum, then filling with argon gas to a slightly positive pressure; performing induction heating to a temperature 50-120°C above the melting point to obtain a melt; lowering an ultrasonic probe into the melt for continuous ultrasonic treatment; reducing the induction heating temperature to 20-60°C above the melting point and continuing ultrasonic treatment; induction heating to the melt temperature being the pouring temperature, performing pulsed ultrasonic treatment, and pouring the melt into an ingot mold; allowing the melt in the ingot mold to continue cooling with the furnace, then removing the vacuum and opening the furnace to obtain a copper alloy ingot. This invention, using the above steps, reduces gas content, increases ingot density, effectively removes non-metallic impurities, improves copper alloy purity, refines grains, and reduces secondary oxidation and gas entrapment during pouring.

The application discloses a low-ash-consumption converter smelting method, adopts single-slag smelting, controls the converter scrap steel ratio in 8% to 26%, controls the top blowing oxygen supply flow in 3.0 to 4.0 Nm 3 / (min·t), controls the bottom blowing argon flow in 0.03 to 0.10 Nm 3 / (min·t); the smelting process is improved by the cooperation of the gun position and the charging; the solid waste slag is added in the converter blowing process, the content of CaO in the slag is controlled in 45% to 55%, and the content of MgO is controlled in 5.5% to 7.5%; meanwhile, the dust removal pressure ball is added to improve the activity of FeO in the slag, and the terminal carbon content of the converter is controlled to be less than or equal to 0.05%. By adding the solid waste slag in the smelting process, the slag needed to oxidize a large amount of iron elements to generate FeO is reduced, so that the total iron content of the slag is reduced; by adding the synthetic slag, the liquidity of the slag is ensured, and the carbon-oxygen reaction is promoted; the total iron content of the low-carbon steel converter terminal slag is stably controlled to be less than 14.5%, the metal yield is provided; the lime addition amount can be reduced, the lime addition amount is controlled to be less than or equal to 10 kg / t, and the cost is reduced.

The application discloses a high-purity stainless steel vacuum induction melting desulfurization method, which comprises the following steps: S1, preparing materials; S2, charging and melting; S3, refining; S4, deoxidizing and desulfurizing: after the refining is completed, deoxidizing alloy and desulfurizing agent are added into the molten steel, and after stirring for 5-10 minutes, argon is filled into the furnace until the pressure reaches 80-90 KPa, the temperature is controlled at 1580-1610 DEG C, and deoxidizing and desulfurizing are performed for 40-50 minutes; S5, secondary refining; and S6, pouring. The high-purity stainless steel vacuum induction melting desulfurization method provided by the application firstly pre-treats raw materials, then performs charging and melting, reduces the contact between molten steel and air through the vacuum induction melting method, improves the desulfurizing and deoxidizing efficiency, and through twice refining and adding specific desulfurizing agent, the sulfur content of the finally obtained high-purity stainless steel is less than 7 ppm, the effect of deep desulfurization is achieved, and the demand of the steel industry is met.

This invention relates to a method for remote epitaxial growth of single-crystal lead-free perovskite microsheets on germanium, comprising the following steps: using CsBr and SnBr2 as source materials placed in a reaction region, using argon as a carrier gas, placing germanium-based graphene in a deposition region, and then heating to react the source materials, followed by evaporation and deposition onto the germanium-based graphene to form single-crystal lead-free perovskite microsheets. The method of this invention can obtain perovskite microsheets with good orientation and is environmentally friendly. Furthermore, germanium is a mature semiconductor material with well-established wafer fabrication, cleaning, and surface treatment processes, making large-scale production possible and providing a new path for perovskite to move from the laboratory to high-performance, multifunctional integrated optoelectronic devices.

This invention discloses a rare-earth Ce-purified Ti-Mn-based hydrogen storage alloy and its preparation method. The preparation method includes the following steps: mixing FeV80 with Ce and melting it in a vacuum arc melting furnace under an argon protective atmosphere; polishing the surface of the FeV80-yCe master alloy to remove the surface-enriched impurity phases, obtaining a purified master alloy; mixing the purified master alloy with Ti, Zr, Mn, and Cr raw materials and arc melting it under vacuum conditions; after melting, cooling it to room temperature with the furnace to obtain the rare-earth Ce-purified Ti-Mn-based hydrogen storage alloy. This invention pre-treats FeV80 with Ce, and removes impurities enriched on the surface of the metal ingot through melting and then polishing. The process is simple and cost-controllable, fundamentally solving the problem of impurity deterioration in industrial raw materials, improving the hydrogen storage capacity of the hydrogen storage alloy at 5MPa hydrogen pressure, and meeting the comprehensive performance requirements for industrial applications.

This invention relates to the field of submerged entry nozzle technology, specifically to a submerged entry nozzle and method for improving the quality of cast billets. It includes a submerged entry nozzle and an argon blowing system; the main body of the submerged entry nozzle is a long cylinder open at the top and closed at the bottom; the lower part of the main body has an upper outlet and a lower outlet; the upper outlet is inclined upwards, and the lower outlet is inclined downwards, with the upper outlet located above the lower outlet; the argon blowing system includes an inlet pipe, a lower connecting pipe, and an outlet pipe; the inlet pipe is connected to an argon gas pipeline, extending into the upper part of the side wall of the main body; the lower connecting pipe is vertically installed on the side wall of the main body, with its top connected to the inlet pipe, its bottom located at the upper outlet, and its bottom connected to the outlet pipe; argon gas enters through the inlet pipe, passes through the lower connecting pipe, and is ejected through the outlet pipe. This significantly improves the quality of the cast billets.

This invention relates to the field of ferroalloy smelting technology and discloses a high-carbon ferromanganese and its preparation method, comprising the following steps: raw material pretreatment; converter preheating and bottom material laying: pretreated high-grade manganese ore, lime, and coke powder are mixed and added as bottom material to the CLU converter for preheating; iron addition and initial reduction: high-carbon ferromanganese is added to the converter, and graphite fragments are added, and initial reduction is carried out under a pure argon atmosphere; atmosphere control and second-stage reduction: when the carbon content of the molten iron drops to 5.0-5.8%, the reblowing gas is switched to a mixed gas of argon, CO, and CH4, and the remaining high-grade manganese ore, silicon carbide, ferrosilicon manganese alloy, and supplementary coke powder are added in batches, while adjusting the slag composition; endpoint judgment and iron tapping. The high-carbon ferromanganese of this invention has precise composition and high purity, and the preparation method is characterized by high efficiency, low consumption, greenness, and high manganese recovery rate, enabling the industrial-scale production of high-carbon ferromanganese.

The present application relates to continuous casting pouring technical field, especially to a kind of titanium-containing alloy steel liquid's continuous casting pouring device and method, including ladle and tundish and workstation, workstation is rotatably installed with load plate, two ladle positions for placing ladle are opened in load plate, the bottom of workstation is fixedly connected with the induction coil long shroud that is communicated with ladle, tundish is fixedly connected with breather bushing, breather bushing is inserted with breather stopper, tundish outside is equipped with tank for guiding argon, the bottom of tundish is provided with induction coil submerged entry nozzle, for guiding molten steel into continuous casting crystallizer, tundish bottom is provided with slow flow mechanism for slowing down the impact force of molten steel falling, the argon is injected in the breather stopper, the titanium-containing steel with poor fluidity is not dead in tundish nozzle, after molten steel flows into tundish nozzle, induction coil submerged entry nozzle also generates induction magnetic field, so that molten steel does not solidify before entering crystallizer.

The utility model relates to low temperature gas cylinder filling technical field, concretely relates to a kind of argon and carbon dioxide mixed gas filling equipment including base, the upper surface of the base is fixedly connected with two symmetrical support frames, the inner wall of two The support frame is respectively provided with liquid argon storage tank and low-temperature liquid carbon dioxide storage tank, the outer wall between two The support frame is fixedly connected with support plate, the inner wall of the support plate is fixedly connected with mixing box, the inner wall of the liquid argon storage tank is fixedly connected with argon filling pipeline. The utility model is provided with filling busbar, can be connected with multiple gas steel cylinders simultaneously, realize the filling of multiple gas steel cylinders simultaneously, accurately control the filling amount of two kinds of gas, to ensure that argon and carbon dioxide are mixed according to specific ratio, while impeller can fully stir and mix argon and carbon dioxide entering mixing box, ensure that mixed gas composition is uniform, improve the use effect of the filling equipment.

The application discloses a preparation method of high-purity silicon carbide powder, which comprises the following steps: mixing carbon source raw materials and silicon source raw materials, then directly synthesizing the silicon carbide powder by microwave heating solid-phase reaction, cooling the silicon carbide powder, crushing the powder, purifying the powder, and then treating the high-purity silicon carbide powder; a step of continuously rotating the mixed raw materials is arranged in the microwave heating process; the molar ratio of the carbon source raw materials to the silicon source raw materials is 0.8:1-1.1:1; the microwave heating process is that a 300kW tunnel microwave oven is used to microwave heat the mixed carbon source raw materials and silicon source raw materials; the microwave frequency is 915MHz, and an argon protective atmosphere is used during the microwave heating. The application dynamically changes the field distribution, ensures uniform microwave field distribution, ensures that the reaction materials are uniformly heated, and provides a good balanced thermal field for the sample.

The utility model discloses multilayer hollow sealed sound insulation aluminum alloy door and window, specifically related to aluminum alloy door and window technical field, including window frame, the inside hinged setting of window frame has the window sash, the inside embedding setting of window sash has fixed glass, the inside setting of fixed glass has sound insulation mechanism, and sound insulation mechanism includes the first glass fixed embedding setting in the inside of window sash, and the second glass is arranged between fixed glass and first glass, and the first hollow cavity is arranged between fixed glass and second glass, and the second hollow cavity is arranged between first glass and second glass. The utility model discloses through multilayer hollow glass filling argon, cooperate with the first sound insulation board of medium density fiber, weaken noise, realize efficient sound insulation, and form multiple strict defense lines, effectively prevent noise, rainwater, dust etc. through the gap and intrude indoor, improve door and window sound insulation, waterproof and dustproof performance greatly, guarantee door and window long -term keep good sealed state.

The application relates to the technical field of metal material processing, and discloses a layered sintering preparation method of a composite layer titanium pot, which comprises the following steps: laying, from bottom to top, stainless steel powder, aluminum powder, active transition layer composite powder and titanium powder in a forming die in sequence, and compacting to obtain a composite green body; placing the green body in a variable pressure sintering furnace, first heating and keeping a low vacuum state; continuously heating to a second set temperature, starting a vacuum pump to instantaneously reduce to a deep vacuum state to discharge gas phase by-products; when heating to a third set temperature, filling argon into the furnace to establish a micro-positive pressure state and constant temperature preservation, inhibiting metal element volatilization and promoting liquid phase filling densification, and finally, cooling at a predetermined rate and naturally cooling out of the furnace. Through a temperature and pressure time sequence coupling process, the application eliminates interface oxide films and hole defects, realizes high-strength metallurgical combination of dissimilar metal materials, and improves the interlayer shear strength, thermal conductivity and thermal shock fatigue life of the composite pot.

This invention relates to the field of new energy vehicle power battery manufacturing technology, specifically a fully automated laser welding and packaging process for lithium iron phosphate battery cells used in new energy vehicles. The process includes: S1. The cell shell is made of 6061 aluminum alloy containing niobium, yttrium, and lanthanum, sandblasted, then ultrasonically cleaned with an ethanol solution containing a silane coupling agent, and dried at 85-95℃; S2. The cover plate is made of 304 stainless steel containing 0.15-0.25wt% zirconium and 0.06-0.08wt% cerium, and the sealing groove is pre-cured with modified polyimide adhesive and then butt-fitted to the shell; S3. The weld seam is pre-coated with a nano-coating containing 0.1-0.3wt% titanium hydride, pulsed welded using a 1064nm fiber laser, and protected with a mixture of argon, helium, and nitrogen gas; S4. Post-weld annealing, ultrasonic treatment by immersion in a titanate aqueous solution, and finally vacuum drying. This process optimizes the shell and cover plate materials, resulting in stable welding quality, high weld strength, good corrosion resistance, improved cell sealing performance and long-term reliability, fully automated operation, and excellent production efficiency and product consistency.

This invention discloses a method and system for controlling surface defects in automotive outer panels. The method includes: performing a calming operation before ladle pouring, controlling the pouring speed at 0.9-1.5 m / min; during ladle pouring, controlling the immersion pouring of the intermediate ladle and adding a covering agent after pouring, adjusting the three argon gas supply based on liquid level fluctuations, replacing the immersion nozzle based on the rising trend of the stopper rod or the liquid level fluctuations, and controlling the intermediate ladle to maintain a set tonnage during the pouring and ladle changing processes; controlling the ladle to perform a steel retention operation until the ladle pouring is completed; and controlling the machine cleaning equipment to perform machine cleaning treatment on the qualified slabs obtained from the pouring.

This invention discloses a vacuum hot pressing process for titanium foil, comprising the following steps: S1, roll cutting; S2, sheet cleaning; S3, loading fixture; S4, vacuum hot pressing; ensuring the sheet surface is clean and dust-free during the cleaning process; the loading fixture ensures the sheet is flat and the fixture is locked; the vacuum heat treatment process ensures the vacuum degree of the heat treatment furnace, and the heat preservation temperature is adjusted according to the flatness standard; high-purity argon gas is introduced during the cooling process to ensure that no micro-oxide layer is generated on the sheet surface, thereby improving the surface quality of the titanium foil.

The application discloses a method for preventing overflow of slag in an impact area of a thread steel tundish, and the method comprises the following steps: automatically reducing the flow of bottom argon blowing at the end of a ladle pouring (remaining molten steel 9%~15%) to reduce the slag body from being involved from the source; adding a gradient composite deoxidizing alloy with specific structure and components when about 30 tons of molten steel is discharged, and the adding amount is accurately matched according to the strength grade (400MPa, 500MPa, 635MPa) of the thread steel and the oxygen content of the ladle slag; and periodically adding a low-aluminum-silicon-barium-calcium alloy in the impact area of the tundish for terminal deoxidization. The application also relates to a gradient composite deoxidizing alloy and a continuous casting production system for realizing the process. By using the application, the overflow of slag in the impact area can be completely eliminated (the overflow rate is reduced to 0%), the quality of the thread steel and the continuous casting efficiency (the number of pouring furnaces is increased to 23) are obviously improved, and the production cost is reduced.

The utility model discloses a metal liquid rapid degassing device for resin sand casting's intermediate frequency electric furnace, related to metal smelting technical field, including bottom plate, be provided with intermediate frequency electric furnace and electric furnace control part on the bottom plate, the bottom of intermediate frequency electric furnace is installed with the air inlet pipe, is installed with the connecting pipe on the air inlet pipe, is installed with the hose on the connecting pipe, is installed with the disconnection pipe on the hose, the top of bottom plate is rotatably arranged with the exchange disc, is installed with the sealing ring in the air outlet pipe, the exchange disc bottom is installed with the exchange shaft, and the exchange shaft rotatable installation is in the bottom plate, and the gear is fixedly sleeved on the exchange shaft, and the gear is intermittently engaged with the gear toothless wheel, and the driving motor is installed on the bottom plate, and the gear toothless wheel is installed on the drive shaft, the utility model discloses, can transport the argon in argon tank to the intermediate frequency electric furnace, and the argon in the intermediate frequency electric furnace will remove the harmful gas in metal liquid quickly. Single argon tank can be automatically and quickly replaced when using, and the operation is convenient and easy to use.

The application discloses a preparation method of a wide-bandgap perovskite photoactive layer, and comprises the following steps: S1, lead iodide powder, cesium iodide powder and ytterbium bromide powder are proportioned according to a proportioning molar ratio, and an inorganic target material is prepared by using a hot-press sintering process; S2, formamidinium hydriodide powder and methylammonium bromide powder are proportioned according to a proportioning molar ratio, and an organic target material is prepared by using a normal-temperature preparation process; S3, a pretreated substrate is placed on a magnetron sputtering sample table, the target materials prepared in steps S1 and S2 are respectively installed on corresponding radio frequency sputtering targets, and the background of a magnetron sputtering system is vacuumized; S4, high-purity argon gas is used as a sputtering gas, and a wide-bandgap perovskite thin film is prepared by using a magnetron co-sputtering method; the sputtering power of the inorganic target material prepared in step S1 is controlled, the sputtering power of the organic target material prepared in step S2 is controlled, and the thickness of the thin film is controlled, so that the high-quality thin film is prepared by using the differential target material preparation process.

This invention discloses a near-space epitaxial method for significantly improving the uniformity of cadmium zinc telluride (CdZnTe) epitaxial films based on air-firing substrate treatment. The method involves air-firing a cleaned and dried gallium arsenide (GaAs) substrate at a predetermined temperature under argon atmosphere. The growth surface is calibrated before air-firing, and the GaAs substrate after air-firing exhibits a matte finish under optimal parameters. A CdZnTe polycrystalline block is used as the growth source. The polycrystalline block is trimmed to fit into the mask apertures and then subjected to grinding, ultrasonic cleaning, and air-firing to remove surface impurities and mechanical damage layers. During the film growth stage, appropriate growth parameters are set in a near-space sublimation furnace to allow CdZnTe to epitaxially grow on the GaAs substrate.

A method for manufacturing a silicon epitaxial wafer comprising a phosphorus-doped silicon wafer and an epitaxial layer provided on a surface of the silicon wafer, wherein the method comprises: forming (S2) an oxide layer on a back side of the silicon wafer cut (S1) from a single-crystal ingot produced by a Czochralski process; removing (S3) the oxide layer present on an outer circumference of the silicon wafer; argon annealing (S4), wherein the silicon wafer is subjected to heat treatment in an argon gas atmosphere after removal of the oxide layer; and forming the epitaxial layer on the surface of the silicon wafer after argon annealing, wherein the formation of the epitaxial layer comprises: pre-baking (S5), wherein the silicon wafer is subjected to heat treatment in a gas atmosphere comprising hydrogen and hydrogen chloride to etch an outer layer of the silicon wafer;and growth (S6) of the epitaxial layer on the surface of the silicon wafer after pre-baking, wherein during argon annealing (S4) clusters of phosphorus and oxygen present on an outer layer of the silicon wafer are dissolved in a solid solution, and during pre-baking (S5) a thickness of the outer layer of the silicon wafer removed by etching is made smaller than a thickness of the outer layer where the clusters are dissolved in the solid solution during argon annealing.;

This invention discloses a method for reducing the refining cost of low-carbon cold heading steel, belonging to the field of iron and steel metallurgical technology. The method includes: recovering molten slag before tapping from the converter; reducing carbon content to below 0.06% in the later stages of smelting; bottom blowing argon after oxygen blowing and measuring oxygen content, dynamically calculating the addition amounts of ferroaluminum and lime; adding ferroaluminum and lime during tapping; adjusting aluminum to 0.050%-0.055% after tapping by feeding aluminum wire; slag breaking and power supply after the molten steel reaches the LF furnace, adding lime at 1.3 times the amount of aluminum added after tapping; raising the temperature to 1600-1605℃ after a second sampling, adding ferromanganese, calculating aluminum loss based on power supply time, and controlling aluminum at 0.035%-0.040%; finally, calcium treatment and soft blowing are performed. This invention achieves low-cost and high-efficiency refining of low-carbon cold heading steel through optimizations such as recovering molten slag, dynamically calculating material addition amounts, moving deoxidation and slag formation forward, reducing material consumption, and replacing large-scale argon agitation for impurity removal.

The utility model discloses a kind of steel ladle argon supply system butt joint device, including upper device and with the lower device of symmetrical arrangement of upper device, the upper device includes upper flat plate, 1 or is two parallelly arranged first connecting component is connected on the upper flat plate, the first connecting component is connected with gas pipeline in detachable mode, the lower device includes lower flat plate, 1 or is two parallelly arranged second connecting component is connected on the lower flat plate, the second connecting component is connected with gas pipeline in detachable mode, the lower device further includes pedestal, hydraulic damper is arranged between the lower flat plate and pedestal, recessed groove space is formed between the lower flat plate and opposite the upper flat plate.

This invention discloses a tungsten inert gas (TIG) shielded welding method and argon protection system for 5083 aluminum alloy pipes. The system includes an argon source, an argon pressure regulating component, a flow regulating component, and a low-emission polymer material gas delivery hose. One end of the gas delivery hose extends into the 5083 aluminum alloy pipe to be welded, supplying gas to the back area corresponding to the weld root. The welding method includes machining a single-sided V-groove at the pipe end, forming a root gap by butt welding, performing argon gas replacement, and using TIG shielded welding for the root pass. During welding, argon gas diffuses through the root gap to the back of the molten pool, achieving back-side protection and assisting in the removal of oxide impurities and fumes. This invention can reduce the risk of argon gas transport contamination, reduce weld shadow defects, improve the stability of the back-side formation of the root pass, and increase welding efficiency.

The present application relates to a kind of methods for preparing composite reducing agent for industrial silicon by using grinding medium to strengthen different caking coal, and belongs to the technical field of preparing composite reducing agent for industrial silicon.The present application uniformly mixes high-viscosity coal powder and non-viscosity coal powder to obtain coal powder mixture A, coffee wastewater is added to the coal powder mixture A and grinding is carried out to obtain coal powder mixture B;the coal powder mixture B is pressed to form a cylindrical blank;the cylindrical blank is placed in an argon atmosphere and subjected to microwave calcination, and is cooled to room temperature with the furnace to obtain a composite reducing agent pellet for industrial silicon.The present application adds coffee wastewater to the mixed coal powder, so that the coffee wastewater penetrates into the pores of the mixed coal powder, increases the contact area between different caking coals, and further increases the reaction rate of the mixed coal in smelting by microwave heating, promotes the crosslinking rearrangement of the structure of the mixed coal, and reduces the reaction activation energy.

The invention relates to the field of tungsten-based alloy target material preparation, in particular to a tungsten-based multi-component alloy target material containing a W3Ni17 specific phase and a preparation method, the target material contains the W3Ni17 specific phase and auxiliary phases such as a W phase and Ni3Ta phase, W powder and Ni powder serve as basic powder, and Cr / Ta / Si powder serves as optional auxiliary powder; the preparation method comprises the steps of multi-step segmented argon protection mixing according to a specific phase atomic ratio, alloying purification, cold isostatic pressing multi-section pressure relief forming, multi-section heating hydrogen protection sintering and the like. According to the design, the problems that a conventional target material cannot form a specific functional phase, elements are segregated, the density is insufficient, and light modulation efficiency and cycling stability are difficult to consider are solved, the density of the prepared target material is larger than or equal to 96%, the average crystal grain is smaller than or equal to 50 micrometers, the W3Ni17 phase accounts for 40%-85%, and the target material is suitable for preparation of a large-area electrochromic film and meets the requirements of the fields of energy-saving buildings, automobiles and the like.