88 results about "Molten alloy" patented technology

The invention relates to a casting method for a low-pressure alloy casting of a riser-free sand mold. The casting method comprises the steps that molten alloy is injected into a casting cavity through a plurality of flow gates in the bottom of the casting cavity in a low-pressure mode for mold filling; during mold filling, the variable-diameter air outlet needle arranged above the casting cavity is used for exhausting air; after mold filling is completed, stepped pressurization and pressure maintaining are conducted on the molten metal in the casting mold cavity; and when the casting is solidified, the thick and large part at the top of the casting cavity is cooled in an accelerated manner, so that the casting is solidified from bottom to top and from the thin-wall area to the thick-wall area. Through bottom multi-pouring-gate mold filling and top variable-diameter gas outlet needle gas exhausting, splashing is prevented. And step pressurization and pressure maintaining are carried out after mold filling, and a thick-wall area is forcibly fed. During solidification, solidification is formed from bottom to top and from thin to thick. A riser is replaced with pouring gate feeding, precise exhaust and solidification control are combined, the feeding and exhaust problems of riser-free casting are solved, riser cutting and polishing are avoided, and meanwhile it is guaranteed that a casting is compact and high in quality.

The invention belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.

The invention provides an alloy and silicon carbide ceramic integrated protective armor structure and a preparation method thereof.The armor structure comprises a ceramic plate framework, long-plate-shaped hole channels distributed regularly are formed in the ceramic plate framework, and the long-plate-shaped hole channels are filled with metal alloy materials formed through pouring; the ceramic plate framework is provided with a metal alloy wrapping layer formed through pouring. During preparation, the ceramic plate framework internally provided with regularly distributed long-plate-shaped hole channels is prepared firstly, then alloy liquid is poured into a mold, the molten alloy liquid is injected into the mold to completely immerse the ceramic plate and fill the long-plate-shaped hole channels in the ceramic plate, and a uniform wrapping layer is formed on the surface of the ceramic plate. According to the structure, alloy and silicon carbide ceramic are effectively combined, reasonable structural design is adopted, high-speed penetrating objects are effectively blocked through the synergistic effect of the high-strength titanium alloy frame and the ceramic plate, and the multiple functions of bulletproof, impact resistance, high temperature resistance, corrosion resistance and the like can be achieved.

The invention discloses a preparation method of an aluminum-iron alloy based on recycled waste. The method comprises the steps that S1, regenerated waste aluminum, regenerated waste iron and a grain refiner are put into a rotary furnace to be treated; s2, the pretreated raw materials are put into an alloying furnace to be refined; s3, the molten aluminum-iron alloy refined through the alloying furnace is cast into an alloy ingot with the required specification through casting equipment, the temperature of the molten alloy is monitored in real time through a temperature sensor in the casting process, and it is ensured that the temperature is stabilized at 740-750 DEG C; and S4, a robot is adopted for automatic unloading, high-temperature stacking and packaging. The duplex process of rotary furnace pretreatment and alloy furnace gradient refining is adopted, and industrial verification shows that the fluctuation range of the alloy component content in the prepared aluminum-iron alloy is decreased, and the Fe content is controlled to be + / -0.8%; the elongation of the product is improved by 12%; the yield of the iron element is increased to 94.5%, and the energy consumption is reduced to 680kWh / ton; the cost is greatly reduced, the cost per ton is reduced by 1350 yuan, and the use ratio of the regenerated material is 97%; and the production period is shortened to 4.2 hours per furnace.

The invention relates to the technical field of radioactive metal waste treatment, and provides radioactive metal waste smelting equipment which comprises a crucible and a desalting device, and the crucible comprises a split crucible used for containing radioactive metal waste; the desalting device comprises a collecting cavity communicated with the split crucible, the collecting cavity is located above the split crucible, and the collecting cavity is used for collecting salt substances evaporated in the heating process of the radioactive metal waste; wherein the crucible is detachably connected with the desalting device. The crucible is detachably connected with the desalting device, after smelting is finished, the crucible can be separated from the desalting device, and a metal ingot can be conveniently taken out from the crucible, so that the crucible can be disassembled, assembled, loaded and unloaded through remote operation such as a mechanical arm in a hot chamber environment, and the desalting device can be used for collecting salt substances and removing salt substances. And the device can be used for sealing the split crucible and can be used for sealing the split crucible, the structure is simplified, desalting, melting, alloying, curing and other functions are integrated, and the technological process is simplified.

A method for manufacturing an alloy component includes forming a mold including a first mold portion and a second mold portion defining a mold cavity therebetween. At least one of the first and second mold portions comprise one or more inserts disposed through an outside surface of a respective mold portion and extending through the respective mold portion proximate to the mold cavity. The method can include delivering a molten alloy into the mold cavity and supporting by the one or more inserts, the molten metal as the molten metal cools to form a part. The one or more inserts can comprise a plurality of hollow tubes extending therethrough, and can enable cooling and / or heating of the molten alloy and / or alloy part through the plurality of hollow tubes.

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 utility model belongs to the technical field of heating, and particularly discloses a riser heating device which comprises a supporting assembly, a heating frame and a heating assembly, the supporting assembly is used for supporting the heating frame, and a riser can be located in the heating frame; the heating assembly comprises a power supply, a magnetism isolating ring and a plurality of groups of induction coils; the induction coils are mounted on the inner side of the heating frame; the induction coil is connected with a power supply, and the magnetism-isolating ring is located at the bottom of the induction coil. The power supply adopts a medium-frequency power supply, the frequency of the power supply is 6 kHz to 10 kHz, and the power of the power supply is 30 kw to 70 kw. The power supply and the induction coil are adopted to carry out induction heating on the casting head of the cast after pouring, alloy liquid in the casting head can be rapidly and effectively heated to the required temperature, and long-time heat preservation can be carried out. The magnetism isolating ring is installed at the bottom of the induction coil, so that magnetic lines of force at the bottom of the induction coil are obstructed, and the problems of turbulent flow of part tenon alloy liquid and crystal grains caused by too high temperature of a cut area are avoided.

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 invention provides a high-temperature corrosion-resistant nickel-based alloy bar and a preparation process thereof, and relates to the technical field of preparation devices.The high-temperature corrosion-resistant nickel-based alloy bar is characterized in that a smelting furnace is assembled on a supporting column and used for smelting alloy, a crawling ladder is installed on the supporting column and used for a worker to check the smelting furnace, and a high-frequency heater is assembled on the smelting furnace and used for heating the alloy; a furnace end used for discharging is arranged at the bottom of the smelting furnace, a motor used for driving a driving assembly is assembled at the bottom of the machine tool, and the driving assembly is used for bearing alloy bars machined by the furnace end and transferring the alloy bars. According to the invention, the driving assembly adopts the collaborative design of the eccentric shaft, the sliding block and the positioning block, so that the turntable can be driven to realize accurate interval rotation, the mold holes in the turntable can orderly receive molten alloy flowing out of the furnace end, sufficient natural cooling time is provided for the alloy bar in the interval rotation process, no cooling equipment needs to be additionally arranged, and the production efficiency is improved. And the bar forming size precision is ensured.

The invention relates to the technical field of alloy materials, in particular to a high-temperature-resistant nickel-oxide-based alloy material and a preparation method thereof.The high-temperature-resistant nickel-oxide-based alloy material comprises, by mass, 12.0%-18.0% of Cr, 8.0%-12.0% of Co, 4.5%-6.5% of W, 1.5%-2.5% of Mo, 5.5%-6.5% of Al, 0.1%-0.3% of Y + La, 1.5%-3.2% of Nb and the balance Ni and inevitable impurities, and the preparation method of the high-temperature-resistant nickel-oxide-based alloy material comprises the steps that molten alloy liquid is poured and cooled, and a cast ingot is obtained; carrying out directional solidification treatment on the cast ingot to obtain a directional solidification cast ingot; and the directionally solidified cast ingot is subjected to aging treatment, and the high-temperature-oxidation-resistant nickel-based alloy material is obtained. The high-temperature oxidation-resistant nickel-based alloy material is excellent in high-temperature mechanical property, stable in bearing under the high-temperature working condition, appropriate in ductility and good in plasticity, and the high-temperature service stability is remarkably improved.

This invention relates to the field of additive manufacturing technology, and provides a method for controlling the microstructure of titanium alloys and its application in the field of medical implants. Pure Mo particles with an average particle size of 10 micrometers, pure Mo particles with an average particle size of 30 micrometers, and Ti6Al4V alloy powder with a particle size range of 15-53 micrometers are selected as raw materials. Powders of different masses from Si are uniformly mixed for at least 5 hours. A dense Ti6Al4V alloy is prepared by optimizing process parameters. Ti6Al4V alloys with α+β dual-phase microstructures with different β-phase contents are prepared. The β-phase content in the formed sample is controlled by changing the overall content of Mo powder. The beneficial effect is that adding Mo powder to control the phase composition of laser powder bed molten Ti6Al4V alloy can achieve the transformation from a completely α-phase to a completely β-phase in the laser powder bed molten Ti6Al4V alloy.

The invention provides a gradient alloy preparation device and method. The gradient alloy preparation device comprises a first chamber which is adjustable in air pressure and relatively closed, and a nozzle on a crucible used for containing molten alloy extends into the first chamber. A driving assembly, a cooling assembly and an annular mold are arranged in the first cavity. Before preparation, the air pressure in the first chamber is larger than that in the crucible, so that molten alloy can be prevented from flowing out to affect preparation. In the preparation process, the air pressure in the first cavity is smaller than the air pressure in the crucible, and the alloy in the molten state is promoted to be sprayed out of the nozzle and enter the annular mold through the pressure difference; and meanwhile, the driving assembly drives the cooling assembly and the annular mold to rotate, molten alloy impacts layer by layer to refine grains, and internal stress can be reduced easily through layer-by-layer solidification. And continuously flowing cooling water is introduced into the cooling assembly and is used for cooling the alloy in the annular mold. In the process, the gradient alloy considering the multiple requirements of strength, toughness, heat resistance, wear resistance and the like is formed by utilizing the difference of the segregation degree of the melt.

The invention discloses a manufacturing method of a copper-magnesium alloy contact wire suitable for a 450km / h high-speed rail, and belongs to the technical field of alloys. The method comprises the following steps: after completely melting a cathode copper plate with a clean surface, adding a magnesium ingot or a copper-magnesium intermediate alloy; after the copper-magnesium alloy is fully molten, adding a copper-calcium intermediate alloy, after the copper-calcium intermediate alloy is molten, cooling the molten alloy, and treating to form a copper-magnesium alloy cast rod; extruding the copper-magnesium alloy casting rod to obtain an extruded rod; the extruded extrusion rod is rolled into a rolled rod; and drawing the rolling rod for multiple times in sequence to form the copper-magnesium alloy contact wire with the cross section area of 120150. According to the alloy composition proportion and the processing technology provided by the invention, the contact line meets the strict requirements of a 450km / h high-speed railway, has high tensile strength, high conductivity and excellent vibration resistance and fatigue resistance, meets related standards, and is suitable for operation of an ultra-high-speed railway.

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.

The invention discloses a composite pipe production method, relates to the field of composite pipe processing, aims to provide a method for realizing theoretical process engineering, and adopts the technical scheme that an internal thread is processed on an inner pipe by adopting a plastic deformation process, then the inner pipe penetrates into a continuous casting mold of a composite furnace, molten alloy melt is cladded on the outer wall of the inner pipe, and the composite pipe is formed. Finally, the outer fins are subjected to disc drawing and rolling after heat treatment through an annealing furnace. According to the method, engineering implementation of a composite pipe machining theoretical process is achieved, actual machining production of the corrosion-resistant composite pipe is facilitated, equipment and a method which are convenient for large-scale production are adopted in the whole process from rolling of the internal threads, machining of the cladding layer, annealing disc pulling to rolling of the external fins, and market requirements can be rapidly met.

The invention relates to the technical field of material science and heat conduction, in particular to a preparation method of water-imitating liquid metal. Comprising the following steps: weighing sodium, potassium and rubidium under the protection of inert gas, and then mixing, heating and stirring to obtain a molten alloy; and after the molten alloy is cooled, the temperature is maintained for sieving, stirring, re-sieving and packaging are conducted, and the water-imitating liquid metal is obtained. By adjusting the metal proportion, melting point control within the range of-50 DEG C to 90 DEG C is achieved, the melting point appears at the needed temperature, different heat transfer requirements are met, the heat conductivity coefficient is far higher than that of water, the heat transfer efficiency is remarkably improved, safety is high, energy is saved, environment friendliness is achieved, the liquid state is kept within the wider temperature range, and energy consumption is reduced; and the water-imitating liquid metal can be recycled, environmental pollution is reduced, and the method is suitable for the fields of nuclear reactor cooling, electronic equipment heat dissipation, aerospace and the like.

An apparatus for extending service life of a shot chamber and for seasoning a molten alloy are provided. The apparatus can be placed on a shot chamber of a die casting machine, absorbing the impact of the molten alloy during pouring, delivering the molten alloy smoothly into a shot chamber, and seasoning the molten alloy so that the alloy can be die cast at temperatures below its liquidus. The use of such an apparatus is expected to significantly increase the service life and a shot chamber in addition to improve the mechanical properties of the resultant cast component.

This invention discloses a method for controlling the in-situ precipitation of multi-scale strengthening phases in alloys and an alloy casting, belonging to the field of metal preparation technology. The method involves placing molten alloy in a crucible of a casting equipment, with a liquid cooling medium filling the area around and below a substrate. The molten alloy is ejected from the crucible outlet and impacts the substrate. Under the spreading and flowing action of the melt, and the cooling effect of the substrate and the liquid cooling medium, submicron-level precipitates are controlled, and a solidified alloy layer is formed. The substrate is then moved downwards towards the liquid cooling medium by a certain distance. This process is repeated, allowing the molten alloy to continuously accumulate and form on the solidified alloy layer. This ensures that the solidified alloy layer undergoes a certain temperature and number of thermal cycles before entering the liquid cooling medium, achieving the control of nanoscale strengthening phases and the formation of the alloy casting. This invention controls the solidification and solid-state phase transformation process of the alloy through a layering method. The process is short, the strengthening phase control effect is good, and high-quality, high-performance alloy castings can be obtained.

Nuclear waste, such as, but not limited to, spent nuclear fuel (SNF) assemblies or portions thereof, are placed within diecast molds, and then gravity fed molding occurs within those loaded diecast molds and around the SNF assemblies (or portions thereof) that are located within those diecast molds, using molten alloy(s) for filling the diecast molds, to form solid metal ingots upon sufficient cooling of the newly formed ingots. The molten alloy(s) may contain a copper alloy. The molten alloy(s) may also contain neutron absorbers and / or helium immobilizing materials. Each such formed ingot may entirely encapsulate a SNF assembly (or a portion thereof) within the resolidified alloy(s). The ingots may be formed into waste capsules. The ingots and / or the waste capsules may be landed in deeply located horizontal wellbores. The deeply located horizontal wellbores may be at least partially located within deeply located geologic formations.

The invention discloses a preparation method of an injectable bismuth-based metal repairing agent, which comprises the following steps of: putting weighed bismuth, indium, tin and zinc metals into a crucible, putting the crucible into a vacuum high-temperature smelting furnace, heating the mixed metals in a vacuum environment until the mixed metals are completely molten by adjusting the smelting temperature, stirring and shaking the formed molten alloy, and then cooling the molten alloy to obtain the injectable bismuth-based metal repairing agent. And ensuring that four elements of bismuth, indium, tin and zinc are uniformly distributed in the alloy, naturally cooling the fully and uniformly mixed molten alloy, and solidifying to obtain the solid injectable bismuth-based metal repairing agent. The repairing agent can be used for treating osteosarcoma, firstly, the repairing agent is injected into a medullary cavity, so that the repairing agent is solidified in situ to form an internal fixing structure, then a magnetocaloric effect is triggered through an alternating magnetic field to induce osteosarcoma immunogenic death, and integrated treatment of tumor removal and bone repair is achieved. According to the scheme, the biological safety and the osseointegration function are achieved, the magnetic-thermal conversion process is efficient, and the good treatment effect on osteosarcoma is achieved.

The application relates to a metal lithium powder and lithium alloy powder material preparation device and method, which comprises a smelting cavity, a filtering cavity and a cooling cavity, the upper port of the filtering cavity is communicated with the smelting cavity, the lower port is communicated with the cooling cavity through a guide hole, the outer end face of the smelting cavity is provided with a heating cover, the upper port of the filtering cavity is provided with a first filter screen, the lower end opening is provided with a second filter screen, and a ventilation pipe is communicated on the side wall of the filtering cavity; a circulating pump, inert cold quenching liquid and a partition plate are arranged in the cooling cavity, the circulating pump and the inert cold quenching liquid are arranged below the partition plate, and a plurality of sieve plates are arranged on the side face of the partition plate. The molten alloy liquid is extruded into the filter core of the filter screen through the pressure difference between the upper and lower parts, the high-speed gas atomizes the molten liquid through the filter core, and the molten liquid is further impacted, dispersed and cooled along the airflow in the zigzag wall, falls into the inert cold extraction liquid, and is further cooled through the cooling circulating pipe and the gradient sieve plate to obtain powder particles with more uniform particle size.

This invention relates to an apparatus and method for high-pressure extrusion of composite material thin plates using an inverted floating die, belonging to the field of composite material preparation technology. The apparatus includes an extrusion mechanism, an inverted forming mechanism, and a heating mechanism. The inverted forming mechanism includes a die cap and a die. The top of the die is open, and its bottom has a central through-hole. The die cap is fastened to the top of the die, forming a forming cavity for the composite material thin plate, into which a preform is placed. The extrusion mechanism forces molten alloy from the central through-hole at the bottom of the die into the interior of the die, permeating the voids in the preform. The heating mechanism controls the temperature of the extrusion mechanism and the inverted forming mechanism. This invention places alloy melting and preform preheating in different devices, preventing the formation of the brittle Al4C3 phase and improving the mechanical properties of the composite material. It solves the problems of complex die design, processing, installation, and debugging, low interchangeability, and difficulty in demolding composite materials when directly extruding composite materials of different sizes and structures in existing technologies.

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).

The present invention provides a method for manufacturing an iron-based soft magnetic alloy having a high Bs (Bs ≥ 1.7T) and low iron loss performance. [Solution] Composition formula (Fe 1-m Co m ) 100-x-y Si x (B 1-n C n ) y The method for producing an iron-based soft magnetic alloy comprises the steps of: preparing a molten alloy with a composition such that the composition ratios x, y, m, and n satisfy 1.0 ≤ x ≤ 3.0 atomic%, 11.0 ≤ y ≤ 14.0 atomic%, 0.05 ≤ m ≤ 0.5, and 0.0 ≤ n ≤ 0.3, respectively; and rapidly cooling and solidifying the molten alloy sprayed from a nozzle on a cooling roll whose main raw material is pure copper, copper alloy, Mo, or W.

The application discloses a kind of micro-remelting composite heat treatment methods for eliminating fatigue anisotropy of additive manufacturing GH4169 alloy, which comprises S1: laser powder bed melting preparation GH4169 alloy sample;S2: micro-remelting composite heat treatment, the alloy sample obtained in step S1 is sequentially subjected to micro-remelting treatment and standard heat treatment;Wherein, micro-remelting treatment includes the following steps: the alloy sample is placed in a special heat treatment equipment, heated to 1270-1290 DEG C, so that the liquid phase fraction of solid-liquid coexistence state is 10%-13%, heat preservation 30-40 min, during heat preservation, 4.5-5.5MPa isostatic pressure is applied, then, heating furnace is cooled to room temperature.The above-mentioned method is prepared by laser powder bed melting alloy, micro-remelting composite heat treatment and other steps, each step process parameter is accurately limited, and through microstructure control, the elimination of fatigue anisotropy is realized.

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.