20 results about "Molten alloy" patented technology

The present invention provides a copper alloy material that suppresses fluctuations in the temperature coefficient of resistance (TCR) and exhibits good solder wettability and molten alloy flowability, a resistor containing the copper alloy material, and a resistor equipped with the resistor. [Solution] A copper alloy material for resistance, comprising Mn: 10.0% by mass or more and 14.0% by mass or less, Ni: 1.0% by mass or more and 4.0% by mass or less, and Al: 0.3% by mass or more and less than 1.0% by mass, with the remainder being Cu and unavoidable impurities.

This utility model discloses a device for casting, including a conveying unit, a fixing unit, a pressure roller assembly, and a locking device. The pressure roller assembly includes multiple connecting parts and a pressure roller body. The pressure roller body is connected to the fixing unit via the multiple connecting parts. The locking device is mounted on the connecting parts and connected to the pressure roller body, and is driven to apply or release pressure to the pressure roller body. This design, with its pressure roller assembly including multiple connecting parts and a pressure roller body, and the locking device mounted on the connecting parts and connected to the pressure roller body, allows the pressure roller body to uniformly compress and compact the molten alloy by adjusting the pressure through the locking device. It can adapt to molten alloy requiring different pressures, thereby reducing air bubbles inside the molten alloy, achieving a smooth surface, and increasing the apparent density of the alloy particles formed by the cooling and hardening of the molten alloy. This, in turn, ensures the quality of the alloy particles and improves work efficiency.

The application provides a method for recycling valuable metals in waste nickel-based superalloy. The method comprises the following steps: sequentially performing alkaline degreasing treatment and acid deoxidation layer treatment on the waste nickel-based superalloy to obtain a to-be-treated material; mixing the to-be-treated material and a molten Mg-M alloy to perform an extraction reaction, and separating a nickel-cobalt eutectic body and an alloy residue after the reaction; M in the molten Mg-M alloy is an auxiliary metal; performing vacuum distillation on the nickel-cobalt eutectic body, and then performing acid leaching on the separated crude nickel-cobalt powder to obtain an acid leaching solution; purifying the acid leaching solution through a chelating type composite membrane to obtain a purified nickel-cobalt solution; performing stripping treatment on the purified nickel-cobalt solution to obtain a stripping solution, and performing evaporation concentration and reduction reaction on the stripping solution to obtain product-grade nickel-cobalt powder. The method provided by the application improves the recycling efficiency and product purity of valuable metals, realizes efficient recycling of nickel-cobalt resources in waste nickel-based superalloy, is low in cost, and is environmentally friendly.

The application relates to the technical field of electronic fabrics, in particular to an electronic fabric based on laser-activated printable conductive ink and a preparation method thereof. Bismuth, indium and tin are mixed to obtain a mixture, the mixture is smelted to completely melt, and a molten alloy is obtained; the molten alloy is mixed with boiling water and ultrasonically treated to obtain an alloy dispersion liquid; the alloy dispersion liquid is centrifuged to obtain alloy particles which are dried and then mixed with a binder solution and stirred to obtain an alloy particle and binder solution composite ink; the ink is then patterned on a fiber pad in a stencil printing mode, and after activation, an electronic fabric is obtained. By combining an electrospun polyimide nanofiber base material and a laser-sintering-activated printable bismuth alloy conductive ink, the prepared electronic fabric has high flexibility, high air permeability and high conductivity, and the square resistance can reach 0.5 omega / D.

A method of manufacturing plated steel having excellent workability and corrosion resistance according to one embodiment of the present invention includes the steps of immersing an iron base into a molten alloy plating bath, and pulling out the immersed iron base from the molten alloy plating bath and performing a cooling process, thereby forming a molten alloy plating layer on the iron base, wherein in the cooling process, a first average cooling rate varies depending on a difference between a first temperature (i.e., a temperature of the molten alloy plating bath) and a second temperature (i.e., a solidification start temperature of a MgZn2 phase constituting the molten alloy plating layer).

This invention relates to the field of metal powder production technology, and provides a non-ferrous metal pre-alloyed powder manufacturing apparatus, comprising: a cylinder, the inner wall of which is surrounded by jet pipes for impacting molten alloy with high-pressure airflow to break the molten alloy into fine alloy droplets; multiple jet pipes are arranged in groups of any two adjacent jet pipes, with the positional relationship between any two adjacent jet pipes being vertical; the jet pipes are supplied with inert gas for impact by an air supply component; and the bottom end of the cylinder is a cooling zone for cooling the freely falling alloy molten droplets into fine particles. By realizing real-time monitoring of the cooling zone temperature and adaptive adjustment of the jet pipe deployment state, when the cooling zone temperature is too high and hinders the solidification of the molten alloy droplets, the jet area is expanded to enhance heat dissipation capacity, solving the problems of insufficient cooling capacity or excessive energy consumption in traditional devices, and significantly improving the accuracy and response speed of temperature control.

This invention provides a molten metal ejection device for manufacturing alloy strips that can reliably dispense molten alloy at a stable ejection rate, thereby enabling the production of high-quality alloy strips. [Solution] A molten metal ejection device 1 comprises a storage container 2 for storing molten alloy M, a dispensing nozzle 3 provided to protrude downward from the bottom of the storage container 2, and an induction coil 4 wound around the storage container 2, and produces an alloy strip B by ejecting molten alloy M from the dispensing nozzle 3 onto the outer surface of a rotating cooling roll 20, further comprising a plate-shaped susceptor 10 made of a conductor located below the storage container 2, the susceptor 10 having an insertion hole 11 into which the dispensing nozzle 3 is inserted, the dispensing nozzle 3 fits into the insertion hole 11 and is heated by electromagnetic induction of the induction coil 4.

The application provides a gradient alloy preparation device and method, which comprises a first chamber with adjustable air pressure and relative sealing, a nozzle on a crucible for containing molten alloy extending into the first chamber. The first chamber has a driving assembly, a cooling assembly and an annular mold. Before preparation, the air pressure in the first chamber is greater than that in the crucible, so that the molten alloy cannot flow out to affect the preparation. During the preparation, the air pressure in the first chamber is less than that in the crucible, and the molten alloy is sprayed out from the nozzle into the annular mold by using the pressure difference; at the same time, the driving assembly drives the cooling assembly and the annular mold to rotate, so that the molten alloy impacts layer by layer to refine the grains, and the layer-by-layer solidification is beneficial to reduce the internal stress. The cooling assembly is connected with continuously flowing cooling water for cooling the alloy in the annular mold. In this process, the gradient alloy with multiple requirements of strength, toughness, heat resistance, wear resistance and the like is formed by using the difference in the segregation degree of the melt.

This invention relates to a self-separating device for amorphous ribbon and its method of use. The self-separating device includes a crucible, an intermediate ladle, a slit nozzle, and a forming and separating assembly. The crucible contains a molten alloy solution. The upper end of the intermediate ladle is connected to the crucible, and the lower end is provided with a slit nozzle. The forming and separating assembly includes a roller core, a roller sleeve, a separator plate, and a drive shaft. The roller core is mounted on the drive shaft, and the roller sleeve is fitted onto the roller core. Multiple positioning grooves are evenly distributed circumferentially on the outer circumferential surface of the roller sleeve. Separators are installed on the positioning grooves. The positioning grooves and separators extend along the length of the roller sleeve, and the separators protrude radially from the outer circumferential surface of the roller sleeve. The separators are configured to confine the molten alloy solution sprayed from the slit nozzle onto the roller sleeve between two adjacent separators to form an amorphous ribbon. By confining the molten alloy solution sprayed from the slit nozzle to the area between adjacent separators, an amorphous ribbon is directly formed without the need for subsequent cutting processes, effectively reducing waste of edge material.

This invention discloses a bismuth alloy rapid melting and storage device, method, system, and electronic equipment, belonging to the field of bismuth alloy material technology. The device includes a bismuth alloy storage chamber, an induction heating module, a temperature control subsystem, a sealing cover, a multi-parameter collaborative control subsystem, and a discharge system. The sealing cover is equipped with an air inlet and a pressure balancing valve to maintain stable chamber pressure. The multi-parameter collaborative control subsystem includes a liquid level and viscosity detection unit, a main controller, and a model predictive controller to achieve multi-parameter signal linkage control. By collecting temperature, liquid level, and viscosity parameters through multiple sensors, and using the model predictive controller to continuously optimize heating power and discharge rate, this invention can maintain the molten alloy liquid level, viscosity, and temperature within a set range, providing a stable supply of molten alloy for subsequent pneumatic spraying. This achieves precise adaptation between the molten alloy and the subsequent pneumatic spraying process, meeting the practical needs of efficient, rapid, and reliable leak sealing in GIS equipment.

This disclosure provides a Ti8AlSn-based alloy casting and its preparation method. The preparation method includes: preheating a mold to obtain a preheated mold; simultaneously pouring molten alloy into the preheated mold and applying ultrasonic vibration to obtain an alloy billet; and performing heat treatment and post-treatment on the alloy billet to obtain the Ti8AlSn-based alloy casting, wherein the ultrasonic vibration is applied from the outer periphery and bottom of the mold into the interior of the mold. The method of this disclosure overcomes the problems of insufficient fluidity and casting defects caused by the high processing temperature and poor intrinsic plasticity of Ti8AlSn-based alloys, effectively avoids melt contamination, and significantly improves the microstructure uniformity and forming quality of the casting.

This invention discloses a high-strength, lightweight aluminum-based medium-entropy alloy and its preparation method, relating to the technical field of lightweight medium-entropy alloy materials. The raw material composition of this aluminum-based medium-entropy alloy, expressed as Al in atomic percentage, can be... a Ti b Cr c M d The alloy comprises 45-65% Al, 10-30% Ti, 15-30% Cr, and 5-10% M, where M is one or more of Sc, V, and Mn, and a+b+c+d = 100. The specific preparation method is as follows: Pretreated raw materials are weighed according to the proportions and placed in a vacuum arc melting furnace or vacuum induction melting furnace. The alloy is melted under high-purity argon protection and held at a constant temperature to ensure uniform composition. The molten alloy is then poured into a preheated cast iron mold or water-cooled copper mold and allowed to cool naturally to room temperature to obtain an aluminum-based medium-entropy alloy ingot. The aluminum-based medium-entropy alloy prepared by this invention possesses both low density and high strength. Its as-cast microstructure is predominantly a solid solution phase, exhibiting excellent strength-plasticity matching. This allows for the fabrication of lightweight, high-performance cast structural parts without the need for complex thermomechanical processing.

This invention discloses a high-corrosion-resistant Mg-Sn-Ge-Mn alloy material with heat resistance and its preparation method. The chemical composition of the Mg-Sn-Ge-Mn alloy material, by mass percentage, is: Sn: 0.05–0.30%, Ge: 0.05–0.20%, Mn: 0.05–0.30%, with the balance being Mg. The preparation method includes the following steps: S1, calculating the required weight of each raw material based on the nominal composition of the Mg-Sn-Ge-Mn alloy, and selecting the raw materials Mg, Sn, Ge, and Mn; S2, placing the raw materials Mg, Sn, Ge, and Mn in a crucible and heating to a preset temperature under the protection of an SF6 / CO2 mixed gas for melting; S3, casting the molten alloy raw materials; S4, subjecting the cast Mg-Sn-Ge-Mn alloy ingot to reciprocating extrusion hot processing to obtain the high-corrosion-resistant Mg-Sn-Ge-Mn alloy material with heat resistance.

The application relates to a preparation method and application of a hydrogen production molten catalyst for hydrocarbon cracking, which comprises adding bismuth in nickel-molybdenum oxide to form a modified NiMo-Bi liquid alloy so as to produce a ternary Ni 3x Mo x -Bi liquid alloy catalyst. The catalyst has low activation energy, can crack methane at 450 DEG C-1000 DEG C, and has high hydrogen production efficiency. At 800 DEG C, the Ni 12 Mo4-Bi catalyst has 100% H2 selectivity and 260 hours of stability. At 1000 DEG C, the 1cm Ni 12 Mo4-Bi catalyst can obtain 62% methane conversion. The application adopts the low-melting-point molten alloy NiMo-Bi as the catalyst, combines the high activity of a nickel-based catalyst for hydrocarbons and the low melting point of a bismuth-based alloy, has high activity and high stability, can effectively crack hydrocarbons, and can continuously and efficiently produce hydrogen through catalytic cracking. Another product of cracking can be separated through water washing to obtain elemental carbon, thereby solving the problems of poor stability, poor carbon deposition resistance and easy deactivation of existing Ni-based supported catalysts or other solid catalysts.

The present application belongs to the technical field of special alloy smelting equipment, and discloses a floating dross removal device and method of vacuum induction furnace based on cooling and sticking. The vacuum induction furnace is first pumped to a specified vacuum degree by a vacuum pump, so that the surface floating dross of the molten alloy liquid is naturally gathered. A high-temperature-resistant cooling plate is installed in the replacement chamber, the vacuum degrees of the two are adjusted to be consistent, the vacuum isolation valve is opened, the plate is controlled to descend and hover by the first servo motor, argon is introduced for protection, cooling water is connected for rapid cooling of the plate, the plate is lowered to contact the floating dross, the floating dross is solidified and adhered by the temperature difference, the undisturbed dross is removed, the different particle size floating dross is efficiently removed, the method for removing the floating dross of the vacuum induction furnace based on cooling and sticking unifies the vacuum degrees of the vacuum induction furnace and the replacement chamber, argon is introduced for protection, the plate is cooled by water, the floating dross on the surface of the alloy liquid is adhered by the temperature difference, the plate is collected and reset for cleaning, and the vacuum melting and undisturbed efficient dross removal can be completed in cycles.

The application discloses a supported molten alloy catalyst for biomass gasification and a preparation method and application thereof, and belongs to the technical field of biomass energy conversion and catalysts. The catalyst comprises a porous carrier and a molten alloy active component in the form of nano-droplets loaded on the surface and in the pores of the carrier. The molten alloy active component comprises a molten catalytic metal and a molten metal additive. The molten catalytic metal is selected from one or more of Ni, Mo and Cr, and the molten metal additive is Bi. During preparation, citric acid is added to a solution of metal salts corresponding to the molten catalytic metal and the molten metal additive, and the solution is stirred uniformly. An equal volume of the obtained precursor solution is loaded on a pretreated porous carrier by using an equal-volume impregnation method. Finally, the loaded catalyst is subjected to staged heating in a reducing atmosphere. The obtained supported molten alloy catalyst has a large specific surface area, can maintain a molten state at high temperatures, is highly dispersed, and has excellent carbon deposition resistance, sintering resistance and catalytic stability.

The present invention provides a copper alloy material that suppresses fluctuations in the temperature coefficient of resistance (TCR) and exhibits good solder wettability and molten alloy flowability, a resistor containing the copper alloy material, and a resistor equipped with the resistor. [Solution] A copper alloy material for resistance, comprising Mn: 10.0% by mass or more and 14.0% by mass or less, Ni: 1.0% by mass or more and 4.0% by mass or less, and Al: 0.3% by mass or more and less than 1.0% by mass, with the remainder being Cu and unavoidable impurities.

This invention provides a method for preparing a titanium-aluminum alloy target material, comprising the following steps: (1) uniformly mixing titanium raw materials and aluminum raw materials to obtain a mixture; (2) smelting the mixture obtained in step (1) to obtain a molten alloy liquid; (3) using the molten alloy liquid obtained in step (2) for spray granulation, and then subjecting the spray-granulated particles to spark plasma sintering to obtain the titanium-aluminum alloy target material. The preparation method provided by this invention obtains alloy powder through spray granulation, and then prepares the titanium-aluminum alloy target material through spark plasma sintering. No plastic processing is required during the preparation process, and the obtained target material has low impurity content, fine and uniform grains, and excellent performance.

This invention discloses a hot-dip galvanized stainless steel ball core extrusion molding die and its process, relating to the field of extrusion molding technology. The die includes a die frame body, comprising an upper die base, a lower die base, and a forming component disposed between the upper and lower die bases, arranged sequentially from top to bottom. A return spring is fixed between the upper and lower die bases. The upper die base has an upward-facing upper cavity at its bottom end, and the lower die base has a downward-facing lower cavity at its top end. The upper and lower cavities form an extrusion molding cavity. The forming component employs a four-lobed opening and closing structure and a return spring. The process involves ball core preheating, immersion in molten alloy plating, rapid transfer into the die, die closing, extrusion and pressure holding, and die opening for part removal. This invention achieves a uniform and dense plating layer, high metallurgical bonding strength, and high sphericity and dimensional accuracy, solving the problems of looseness, peeling, and dimensional deviations in traditional hot-dip galvanizing. It is suitable for the industrial mass production of ball valve cores.

This invention discloses a vanadium-based solid solution hydrogen storage alloy and its preparation method. The vanadium-based solid solution hydrogen storage alloy is a V-Ti-Fe-Cr-Nb pentagonal solid solution alloy. The preparation method is as follows: weigh the alloy materials according to the alloy ratio; place the prepared raw materials into a crucible in an electric arc furnace in order of increasing melting point; after adding the raw materials, evacuate the electric arc furnace; adjust the arc gun to 3-5 mm away from the sample, and begin melting after successful arc ignition; slowly cool the molten alloy to room temperature. The vanadium-based solid solution hydrogen storage alloy provided by this invention can improve hydrogen storage capacity and optimize hydrogen absorption and desorption performance.