232 results about "Molten alloy" patented technology

The invention belongs to the technical field of vacuum melting furnaces, and discloses an alloy vacuum melting furnace which comprises a melting furnace body, a sliding lifting frame is installed in the melting furnace body, a rotating electric crucible is installed at the upper end of the lifting frame, a feeding opening is formed in the upper end of the melting furnace body, and a feeding sealing cover is installed at the upper end of the feeding opening. A flow guide disc is fixedly mounted on the side surface of the lower end of the lifting frame, a flow guide opening is formed in the side surface of the lower end of the flow guide disc, a drainage opening is formed in the outer side surface of the smelting furnace body, and a cooling mechanism is arranged on one side of the smelting furnace body. The vacuum degree loss and the cooling waiting time in the cooling and discharging process are reduced in a continuous closed transfer mode, so that the purpose of continuous and efficient smelting is achieved. According to the alloy vacuum melting furnace, in the process that the lifting motor drives the electric crucible to ascend, the mode that the angle gear is meshed with the angle toothed bar is utilized, and the electric crucible automatically turns over to pour molten alloy.

The invention relates to a high-capacity Mg-RE (Ce, Y)-Sc-A < l-Ca >-based solid hydrogen storage alloy for a fuel cell and a preparation method thereof, the hydrogen storage alloy comprises the following components: Mg95-x-yCexYySc0.5 A < 4.5-z > Caz + m wt.% (NbF5 + V2O5), x, y and z in the formula are atomic ratios, 0.5 < = x < = 2, 0.5 < = y < = 2, 0.5 < = z < = 3, m is the percentage of NbF5 + V2O5 in the alloy, 2 < = m < = 8, and the mass ratio of NbF5 to V2O5 is 1: 1. The preparation method comprises the following steps: carrying out induction heating smelting under the protection of inert gas, and injecting molten alloy into a copper casting mold to obtain an alloy ingot; after the cast ingot is put into a quartz tube to be subjected to induction heating melting, under the pressure action of inert gas, liquid alloy continuously falls on the surface of a rotating water-cooling copper roller in a jetting mode, and rapid quenching alloy of a nanocrystalline microstructure is obtained; and the rapidly quenched alloy is subjected to mechanical crushing and sieving, and then is subjected to ball milling together with catalysts NbF5 and V2O5 in a high-purity argon gas environment, so that the ultrafine grain alloy powder is obtained. Through component design, microstructure regulation and control and addition of a multi-element catalyst, the thermal stability of alloy hydride is reduced, and the hydrogen absorption and desorption thermodynamic and dynamic performance of the alloy is improved.

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 technical field of integrated die-casting forming, and relates to a semi-solid double-alloy integrated die-casting forming method and system.The method comprises the steps that two kinds of semi-solid alloy slurry are prepared, specifically, at least two kinds of metal are mixed and then heated to be melted; after inert gas is filled to clean residual oxygen in the resistance furnace, refining and degassing are carried out, so that the molten alloy liquid is synchronously subjected to eccentric rotation and indirect ultrasonic treatment for the same time in the inert gas closed environment to generate vortexes and grow solid-phase particles, and meanwhile, the high-pressure inert gas closed environment is vacuumized; corresponding semi-solid alloy slurry is obtained; cooling the two kinds of semi-solid alloy slurry, and then respectively transferring the two kinds of semi-solid alloy slurry into corresponding injection chambers in an inert atmosphere; and the two kinds of semi-solid alloy slurry are sequentially or simultaneously injected into the corresponding areas in the die-casting die, the two kinds of semi-solid alloy slurry are converged, and a metallurgical-mechanical composite bonding interface is formed at the joint of the two kinds of semi-solid alloy slurry. According to the invention, the effects of uniform material structure and high injection efficiency of the integrated injection casting can be realized.

The invention discloses a high-performance ultrathin rare earth permanent magnet sheet and a preparation method thereof, and belongs to the technical field of rare earth permanent magnet material preparation. The preparation method comprises the following steps: melting an iron raw material and a part of a samarium raw material under a vacuum condition, then adding the balance of samarium, continuously melting, and pouring the obtained molten alloy onto a cooling roller to obtain a samarium-iron alloy sheet; the samarium-iron alloy sheet is sequentially subjected to homogenization treatment, hydrotreating and nitriding treatment, and nitrided magnetic powder is obtained; adding phosphoric acid and a corrosion inhibitor into the magnetic powder, carrying out wet ball milling, and drying to obtain surface-treated magnetic powder; adding a binder into the surface-treated magnetic powder, and banburying to obtain magnetic particles; the magnetic particles are pressed by a press vulcanizer, the thickness of the prepared rare earth permanent magnetic sheet is only 0.2 mm-0. 4mm, and the magnetic sheet is high in corrosion resistance, sufficient in surface magnetism, high in magnetic performance, low in preparation cost and capable of meeting application requirements of specific scenes.

The invention provides a preparation method of a fully-active lithium-silicon alloy negative electrode material, which comprises the following steps: (S1) adding lithium foil and silicon powder treated by hydrofluoric acid into a ball milling tank, and performing ball milling in an inert atmosphere to obtain mixed powder; (S2) pressing the mixed powder into a compact precast block; heating the precast block to 450-550 DEG C by using a smelting furnace, and keeping the temperature for 10-20 minutes, so that the lithium part is molten to wet the silicon; (S3) the temperature is increased to the reaction temperature of 680-850 DEG C, heat preservation reaction is carried out for 10-30 min, metal lithium and silicon are fully reacted, and molten alloy is obtained; and (S4) the molten alloy is sprayed to a water-cooled rotating copper roller through a quartz nozzle, the rotating speed of the rotating copper roller is 3000-5000 rpm, and the fully-active lithium-silicon alloy is obtained after cooling. The obtained lithium-silicon alloy has the characteristic of high amorphization, has extremely high ion-electron conductivity and relatively low hardness, and can relieve expansion and shrinkage of a negative electrode in a charging and discharging process, so that the rate capability and the cycling stability of a sulfide solid-state battery are improved.

The invention discloses a method for preparing a strong-texture bismuth telluride-based thermoelectric material through construction molding, and the method specifically comprises the steps: respectively weighing Bi, Te and Sb elementary substances according to a design ratio, crushing the Bi, Te and Sb elementary substances into fine powder, sieving the fine powder, and carrying out ball-milling mixing to obtain a mixed material; dividing the obtained mixed material into two equal parts, and carrying out sintering molding by adopting spark plasma sintering equipment, so as to obtain a No.1 sintering blank and a No.2 sintering blank which are the same in size; carrying out mechanical grinding and polishing on one surface of the obtained blank to form a mirror surface; and putting the treated mirror surfaces into a mold in a contact manner, and sintering and molding by using spark plasma to obtain the constructed and molded strong-texture thermoelectric material. The method has the beneficial effects that through two times of spark plasma sintering, sufficient diffusion of alloy elements is facilitated, so that the traditional melting alloying step is omitted, the production efficiency is improved, and the cost is saved. Meanwhile, the orientation consistency of the thermoelectric material can be greatly improved through the secondary sintering forming technology, and the strong-texture thermoelectric material is obtained.

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 relates to a high-ductility alloy steel fiber melting wire-drawing forming process applied to the field of wire-drawing forming, which comprises a coating unit and a wire-drawing unit, the process can simplify the process flow and improve the production efficiency by directly drawing molten alloy steel; the forming quality of steel fibers can be effectively improved by wiredrawing under the condition that the microstructure of the alloy steel is not shaped, and the wiredrawing aperture is adaptively and dynamically adjusted according to the wiredrawing speed by utilizing the characteristic that the wiredrawing module deforms along with the temperature, so that the wiredrawing quality of the steel fibers is effectively improved; and the wire drawing oil mixed with the fluorescent agent is coated on the steel wire at intervals, so that the consumption of the wire drawing oil can be saved, the wire drawing speed can be monitored in real time, the wire drawing aperture can be automatically regulated and controlled according to the detected wire drawing speed, and the steel wire is effectively prevented from being locked.

The invention discloses an amorphous nanocrystalline magnetic material production method, which relates to the technical field of amorphous nanocrystalline, and comprises the following operation steps: S1, material preparation; s2, alloy smelting, wherein the prepared raw materials are added into a vacuum induction smelting furnace according to a specific proportion; s3, single-roller rapid quenching strip manufacturing is conducted, specifically, smelted alloy liquid flows out through a nozzle at the bottom of the vacuum induction smelting furnace and is sprayed to the surface of a copper roller rotating at a high speed, and the alloy liquid is solidified into a thin strip; s4, nano-crystallization treatment: putting the prepared amorphous ribbon into a vacuum annealing furnace for annealing treatment; s5, magnetic field heat treatment, wherein after annealing treatment, the thin strip is placed in a high-intensity magnetic field environment to be subjected to heat treatment again; and S6, forming processing: winding the thin strip into an inductance coil by using a winding device. According to the production method of the amorphous and nanocrystalline magnetic material, the operation steps are simpler, the production efficiency of amorphous and nanocrystalline is higher, and the quality of the material is better.

A method of creating a seal in a tubular by melting a first component comprising a fusible alloy, using heat produced by an exothermic, hydrolysis reaction of a second component comprising a metal, to provide a melted fusible alloy, and allowing the melted fusible alloy to solidify in the tubular, wherein the fusible alloy expands upon solidifying and forms the seal. A system for carrying out the method is also provided.

To provide methods, systems, and apparatus, including computer programs encoded on computer storage media, for creating magnetic material.SOLUTION: A methods includes melting magnetic elements to create a molten alloy, forming cast alloy flakes that comprise 2:14:1 phase grains, pulverizing the cast alloy flakes to create a first powder while maintaining at least some of the 2:14:1 phase grains, pressing and aligning particles in the first powder to create and sinter a first compact to create a sintered compact, fragmenting the sintered compact to form a second powder while maintaining at least some of the 2:14:1 phase grains from the sintered compact, mixing the second powder with a rare earth material and an elemental additive to produce a homogeneous powder while maintaining at least some of the 2:14:1 phase grains from the second powder, and sintering and magnetizing the homogeneous powder to form an Nd-Fe-B magnetic product.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of sodium ion battery negative electrode preparation, and particularly relates to a preparation method of carbon-coated porous tin, which comprises the following steps: preparing an alloy through a gas atomization method, then removing auxiliary metals in the alloy to prepare porous tin, and finally realizing doping and separating the porous tin through a hard carbon coating method to complete preparation of the carbon-coated porous tin. Comprising the following specific steps that 1, alloy smelting is conducted, specifically, alloy is melted and mixed, and alloy liquid is obtained; 2, granulation is conducted, specifically, the molten alloy is prepared into alloy particles in an atomization tank through a gas atomization method; 3, etching, wherein at least one auxiliary metal in the alloy is removed through an etching method, and porous tin or tin alloy is obtained; and 4, coating: carrying out surface treatment on the porous tin by using a coating method to realize doping and separation of the porous tin. According to the invention, the three-dimensional porous structure of the porous tin enables the porous tin to have a higher specific surface area and a larger contact area with electrolyte, so that the efficiency of electrochemical reaction is improved.

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 provides a smelting process and smelting equipment of a high-grade nickel-based high-temperature alloy, and relates to the technical field of alloy manufacturing, the smelting process comprises the following steps: S1, preparing raw materials; s2, vacuum induction smelting; s3, plasma beam refining is conducted, specifically, plasma beam refining equipment is used for conducting plasma beam reciprocating scanning on the molten alloy liquid in the S2, and impurities in the high-temperature alloy are removed again; s4, rare elements are added, and after plasma beam refining in S3 is finished, the prepared rare elements are added into the high-temperature alloy in the molten state; wherein when the rare elements are added, the high-temperature alloy in the molten state is synchronously controlled to be directionally stirred, and the powder-state rare elements are added into the furnace in batches in a reciprocating swing mode to be in contact with and mixed with the high-temperature alloy in the molten state. According to the method, the overall smelting time is shortened, the loss of rare elements is reduced, and the quality of the final finished product high-grade nickel-based high-temperature alloy is improved.

The invention discloses a preparation method of a near-net forming refrigerant runner plate, which comprises the following steps: A, aiming at a refrigerant runner plate with a complex structure, designing a mold, a salt core structure and a combination mode of the mold and the salt core structure on the basis of a casting method; b, preparing an alloy raw material, a mold and a salt core, preheating and assembling the mold and the salt core, and casting a melt obtained by melting the alloy raw material to obtain a blank; and C, the blank is subjected to aftertreatment, and the refrigerant runner plate is obtained. According to the invention, the casting process of the runner plate is effectively improved, so that the near-net forming of the runner plate is realized, the machining workload is obviously reduced, the preparation process is shortened, and the cost is reduced.

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.

The invention discloses a method for controlling the content of magnesium in a high-temperature alloy, and belongs to the technical field of special metallurgy. The scheme comprises the following steps: performing vacuum induction melting on each raw material according to the component requirements of the smelted high-temperature alloy; niMg-MoO3-C-Mo composite alloy balls are added into the vacuum induction molten metal liquid, smelting continues to be carried out, and alloying treatment of Mg is carried out; the ratio of the density of the NiMg-MoO3-C-Mo composite alloy balls to the density of the molten metal is 1.05-1.10, the NiMg-MoO3-C-Mo composite alloy balls comprise inner-layer pellets and Mo powder wrapping the inner-layer pellets, and raw materials of the inner-layer pellets comprise MoO3, C and NiMg alloy; the molten metal subjected to Mg alloying treatment is poured into a consumable electrode; and the consumable electrode is subjected to electroslag remelting, so that an electroslag ingot is obtained. According to the scheme, the NiMg-MoO3-C-Mo composite alloy balls with the density larger than that of the high-temperature molten metal are put into the high-temperature molten alloy, and the yield of Mg in the smelting process is effectively increased.

According to the carbon-coated nickel-based hydrogen storage alloy and the batch preparation method, nickel serves as a base material, rare earth elements are introduced to optimize the grain structure and inhibit the hydrogen embrittlement phenomenon, transition metal is combined to regulate and control the hydrogen storage dynamic performance, meanwhile, trace metal elements are added to enhance the oxidation resistance, nickel-based alloy components are precisely regulated and controlled through suspension smelting, and the carbon-coated nickel-based hydrogen storage alloy is obtained. Smelting under the protection of argon; the method comprises the following steps: converting molten alloy into micron-sized particles by adopting a high-pressure gas atomization process, introducing an olefin-containing mixed atmosphere into an atomization tower, cracking olefin at a high temperature by utilizing the catalytic activity of a nickel surface, and generating a graphitized carbon coating layer in situ in an atomization flight process; and the carbon layer structure is optimized through multi-stage annealing and trace oxygen passivation treatment subsequently, the carbon-coated nickel-based hydrogen storage alloy with high thermal conductivity and excellent cycle stability is finally obtained, the single-time treatment capacity reaches the hundred-kilogram level, and low-cost batch preparation is achieved.

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.

To provide a method for producing an aluminum alloy casting that prevents a reduction in ductility and achieves superior mechanical properties.SOLUTION: A method for producing an aluminum alloy casting includes: a casting step of providing a cast material by solidifying molten Al-Si-Mg alloy material within a mold, a crystallization step of reducing the casting temperature of the cast material to 400°C or less after the completion of solidification of the molten alloy, a solution treatment step of holding the casting temperature of the cast material at 450-550°C for 10 minutes or more after the crystallization step, and a cooling step of cooling the cast material after the solution treatment step.SELECTED DRAWING: Figure 1

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 invention discloses a Ca3Co4O9-based metal ceramic material with a nano / micro honeycomb sandwich structure and a preparation method of the Ca3Co4O9-based metal ceramic material, and belongs to the technical field of high-temperature ceramic-based thermoelectric conversion materials.The preparation method comprises the steps that a heated and molten alloy is infiltrated into a surface-modified porous Ca3Co4O9 ceramic matrix through a normal-pressure infiltration or double-face-vacuum melting infiltration technology, and the Ca3Co4O9-based metal ceramic material with the nano / micro honeycomb sandwich structure is obtained; and the Ca3Co4O9 metal ceramic material is successfully prepared. According to the method, after the surface of ceramic is modified, a Ca3Co4O9 ceramic matrix is vertically placed on an alloy under the normal pressure or vacuum condition, after the alloy is heated and melted, an alloy liquid phase spontaneously fills pores in the ceramic or permeates into the ceramic due to the action of capillary force, and after the alloy is solidified, a two-phase combined honeycomb sandwich structure is formed. The conductivity and seebeck coefficient of the material can be effectively improved, so that the ZT value of the material is improved.

The present application relates to the field of preparation of ceramic-metal composite materials, and specifically to an ultrasonic-assisted variable speed loading extrusion infiltration method for preparing ceramic-metal dual-continuous gradient composite materials, comprising the following steps: preparing a porous ceramic preform; melting the pre-impregnated alloy to obtain a molten alloy; preheating an ultrasonic vibration-variable speed loading mold, preheating the ceramic preform, and placing the porous ceramic preform into the ultrasonic vibration-variable speed loading mold; pouring the molten alloy into the ultrasonic vibration-variable speed loading mold; applying ultrasonic vibration to the bottom of the ultrasonic vibration-variable speed loading mold; applying pressure on the punch of the ultrasonic vibration-variable speed loading mold and implementing variable speed loading; taking out after the infiltration is completed and cooling to room temperature to obtain a ceramic-metal dual-continuous gradient composite material. The preparation method of the present application can realize the rapid preparation of ceramic-metal dual-continuous gradient composite materials in an atmospheric environment without protective gas.

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.

An apparatus for producing solid alloy components from its liquid state are provided. A molten alloy is rapidly cooled using a chill to temperatures below the thermosolutal transition temperature of the alloy. Finite-amplitude acoustic vibration is applied on the chill to shake off dendrites that form on the chill surface, to stir the slurry containing the fragments of dendrites, and to shake off slurry material that sticks on the surface of the chill as the chill is separating from the slurry. The slurry is then immediately poured into a chamber of a forming machine or a mold cavity shaped into solid components.

The invention discloses a sintering furnace suitable for hard alloy machining, and belongs to the technical field of sintering furnaces. The hard alloy sintering furnace comprises a sintering furnace body, and a heating mechanism used for melting hard alloy and a slag removing mechanism assisting in melting the hard alloy are arranged in the sintering furnace body; the heating mechanism comprises a sleeve, a crucible is arranged in the sleeve, and the periphery of the crucible is sleeved with a smelting coil used for heating the crucible. The slag removal mechanism comprises a slag removal straight barrel, a slag removal rod is rotationally installed in the slag removal straight barrel, a material smashing end is arranged at the end of the slag removal rod, a sliding groove is formed in the material smashing end, and a moving rod is installed in the sliding groove in a sliding mode; the slag removal mechanism is matched with the casting mold mechanism, melting and separation of hard alloy are accelerated, slag in the crucible is removed, the casting mold mechanism is used for casting and transferring the molten alloy, the sintering process is continuously carried out, repeated vacuum breaking operation does not need to be carried out on the sintering furnace, and the machining efficiency is improved.

The invention belongs to the field of core analysis, and discloses a high-temperature and high-pressure model pore network characterization system which comprises an analysis rack and an analysis model, the analysis model comprises a model main body, an execution assembly and a main body lower pressing cap, and an upper pressing plate and a lower top plate are arranged at the upper end and the lower end of the model main body respectively; a hanging basket for placing a detection sample is arranged at the bottom end of the upper pressing plate, and a Wood alloy block is arranged at the upper end of the lower top plate. Through mutual cooperation of the model main body, the upper pressing plate, the lower top plate, the upper execution assembly, the lower execution assembly and other parts, a rock core analysis experiment is realized in a molten alloy mode, and the upper execution assembly and the lower execution assembly pressurize the rock core analysis experiment in an oil pressure mode. In this way, the alloy has higher contrast contrast with the matrix particles, the imaging effect is better, and the problem that in a traditional method, fine depiction of the pore structure in the whole pore diameter range is difficult to achieve is effectively solved.

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.