247 results about "Induction furnace" patented technology

The invention relates to the technical field of image data processing, in particular to an induction furnace coil temperature field visual monitoring method based on thermal imaging, and the method comprises the steps: obtaining the three-dimensional temperature field data of an induction furnace coil, and extracting high-temperature voxels; an adaptive weight is constructed for each high-temperature voxel, and the weight is composed of two parts: 1, the local linearity of the voxel is determined by calculating the projection density of the voxel in multiple directions; secondly, obtaining a colinearity score by calculating the consistency of the candidate voxel and other candidate voxels in the neighborhood of the candidate voxel in the local main direction; and performing weighted Hough transform on the candidate voxels to vote by taking the product of the two as an adaptive weight. Through the intelligent weighting mechanism, real linear fault signals can be effectively amplified, noise interference is suppressed, and the detection accuracy and robustness of early discontinuous linear high-temperature faults are improved.

The invention provides a method for preparing a copper ingot through waste copper refining, and belongs to the field of waste copper refining. The method comprises the following steps: sorting, crushing and drying a waste copper raw material to obtain a pretreated copper material; feeding the pretreated copper material into a cored power frequency induction furnace for melting; after the pretreated copper material is completely molten, adding a slag removing agent into the melt, then lowering the voltage, and salvaging slag after heat preservation; a magnetic refining agent is added into the melt obtained after slag fishing, stirring is carried out to adsorb impurity elements in the melt, then heat preservation and standing are carried out, and the magnetic refining agent is recycled; the refined melt is subjected to electromagnetic stirring and ultrasonic wave cooperative treatment, so that hydrogen and oxygen gas is deeply removed, and components are homogenized; and a slag conglomeration agent is added into the purified melt, stirring is conducted, slag is fished out after heat preservation, and casting is conducted to form an ingot. Therefore, deep and efficient removal of various types and trace harmful impurities (especially As, Pb, Sb and the like) in the waste copper is synergistically realized, and the metallurgical quality of final copper ingots is synchronously improved.

The invention discloses a high-thermal-conductivity Mg-Zn magnesium alloy suitable for rheoforming and a preparation and processing method of the high-thermal-conductivity Mg-Zn magnesium alloy. The alloy comprises the following components in percentage by weight: 1-8% of Zn, 0.5-5% of Cu, 0.2-2% of Sn, 0.2-1% of Sc and the balance of Mg and inevitable impurities. The preparation and processing method comprises the following steps: (1) preparing raw materials according to the composition of the alloy components, and smelting by adopting a medium-frequency induction furnace and taking mixed gas of tetrafluoroethane and argon as a protective atmosphere; (2) mechanical stirring and ultrasonic synergistic stirring are combined to form a uniform melt; (3) preparing semi-solid slurry with a solid phase ratio of 35-50%; (4) forming; (5) cooling and opening the mold; (6) the obtained rheoforming blank is heated to 340-430 DEG C, heat preservation is conducted for 2-12 h, and after heat preservation is finished, quenching is conducted immediately, and cooling is conducted to the room temperature; (7) pre-aging; and (8) aging. By reasonably designing alloy components and optimizing rheoforming parameters, the defects of shrinkage, hot cracking and segregation of a conventional cast Mg-Zn alloy are overcome, and meanwhile, high heat conductivity and mechanical properties are guaranteed.

A preparation method for high-nitrogen austenitic stainless steel. The high-nitrogen austenitic stainless steel comprises the following chemical components in percentages by weight: carbon: ≤0.02%; silicon: 0.4-0.8%; manganese: 10.2-12.5%; chromium: 24.5-26.5%; nickel: 13.5-16.5%; molybdenum: 3.2-4.8%; nitrogen: 0.75-0.95%; phosphorus: ≤0.03%; sulfur: ≤0.0025%; vanadium: 0.016-0.022%; niobium: 0.026-0.034%; copper: 0.2-0.35%; aluminum: 0.01-0.02%; cerium: 0.015-0.025%; and the balance of iron and inevitable impurities. The preparation method comprises the steps of raw material charging, vacuum melting, refining, nitrogen-added alloying, deoxidation and desulfurization, casting, electroslag remelting, and secondary casting. The preparation is implemented by using the processes of smelting in a pressurized induction furnace and electroslag remelting under a protective atmosphere; and nitrogen is added by using a method in which a nitrogen alloy and pressurized nitrogen permeation are combined.

The invention belongs to the technical field of induction furnace intelligent control, and discloses a non-vacuum induction furnace power supply system optimization method based on an improved PSO algorithm. The method comprises the following steps: establishing a basic principle and a heat transfer theory of non-vacuum induction furnace smelting, and according to an energy conservation principle, taking power supply parameters of each stage of an induction furnace as decision variables, on the premise of ensuring that molten steel with qualified temperature is obtained, taking electric energy minimization as an optimization target, and increasing necessary constraints in an actual production process; establishing a mechanism-based non-vacuum induction furnace power supply system optimization model, and calculating power supply parameters by adopting an improved PSO (Particle Swarm Optimization) algorithm; the power supply parameters comprise power, duration and power change rate. According to the method, power supply parameter optimization is more accurate, inertia weights can be dynamically adjusted along with the smelting energy balance state corresponding to the power supply parameters (weight attenuation is slow when errors are large, and weight attenuation is fast when errors are small), and the situation that traditional PSO weights are fixed or only attenuated linearly is avoided.

The application provides a structure Cu-containing Mo-V micro-alloy cast steel and a preparation method thereof. The cast steel material is composed of the following components in percentage of mass fraction: C: 0.06-0.13%, Mn: 1.3-1.9%, Si: 0.2-0.4%, Ni: 0.5-1%, Mo: 0.18-0.42%, V: 0.05-0.09%, and Cu: 0.25-0.65%. The method comprises the following steps: step one, adding a blank into an electric arc furnace or an induction furnace; step two, performing conventional smelting on the blank to obtain a molten steel with a required mass target component; step three, adjusting the temperature of a semi-finished cast steel and tapping the molten steel to obtain the cast steel; step four, performing heat treatment on the cast steel; and step five, judging the qualification of the cast steel to obtain a high-quality finished cast steel. Through the structure Cu-containing Mo-V micro-alloy cast steel and the preparation method thereof, the yield strength grade of the non-quenching + tempering type micro-alloyed precipitation strengthening type cast steel can be further improved, the low-temperature toughness of a large-size structure cast piece under a conventional process can be improved, and the cost consumption of the large-size structure cast piece under the conventional process can be reduced.

The invention relates to a thick and large-section nodular cast iron inoculation method based on a laminated slow-release inoculation block. The method comprises the following treatment steps that S1, raw materials are prepared; s2, the high-purity pig iron, the waste steel and the nodular cast iron foundry returns in the step S1 are put into an electric induction furnace to be smelted; s3, performing carbon and silicon testing on the molten iron subjected to slag removal in the step S2 by using a carbon and silicon analyzer, and adjusting components; s4, carrying out primary spheroidizing inoculation by adopting a pouring method; and S5, after spheroidizing inoculation is completed, molten iron is poured into a sand mold, a laminated slow-release inoculation block is placed in the sand mold for slow-release inoculation, and a thick and large-section spheroidal graphite cast iron casting is formed. The method has the advantages that slow-release inoculation is implemented in the cross gate, and molten iron continuously and slowly releases an inoculant in the pouring process through the laminated slow-release inoculation blocks. By means of the method, inoculation recession can be effectively inhibited, the graphite form is improved, and finally the density and the spheroidization rate of graphite nodules in the center of the thick and large-section nodular iron casting are increased.

A method is provided for life cycle wear monitoring of a consumable refractory in an electric induction furnace used for heating and melting materials by accumulating laser imaging data of the refractory's inner surface periodically over the refractory's life cycle while the furnace is utilized in a foundry environment and processing the accumulated imaging data for comparative analysis with previous laser imaging data of the refractory's inner surface.

The medium-frequency induction furnace comprises an induction furnace body, a protective cover is connected to the surface of the induction furnace body in a sleeved mode, a first sliding groove is formed in the top of the protective cover, an external threaded rod is welded to the top of the induction furnace body and located in the first sliding groove, and an internal threaded ring is connected to the surface of the external threaded rod in a sleeved mode. The bottom of the internal thread ring is attached to the top of the protective cover. According to the medium-frequency induction furnace, the surface of the induction furnace body is sleeved with the protective cover, the first sliding groove is formed in the top of the protective cover, meanwhile, the outer threaded rod is welded to the top of the induction furnace body, and the outer threaded rod is located in the first sliding groove till the bottom of the inner threaded ring is attached to the top of the protective cover, so that the protective cover can be fixed; and at the moment, the protective cover can provide a protective effect for the circuit of the medium-frequency induction furnace, so that the circuit is not contacted, and the protective property is stronger during use.

The invention belongs to the field of automation control, and particularly relates to an automatic slag raking method and system for an induction furnace and a computer storage medium. The automatic slag raking method comprises the following steps: controlling a robotic arm to carry an image acquisition device to a detection point and obtain a fused image at an induction furnace mouth, wherein the fused image is obtained through image registration and fusion based on visible light and a thermal image; according to the fused image, identifying and segmenting a furnace mouth frame, a slag liquid mask area and a slag mask area based on a semantic segmentation model; if the slag liquid mask area is recognized, the average height of the liquid level and the average thickness of the slag are calculated based on the position coordinates of the furnace mouth frame in the image, the obtained first average depth of field corresponding to the slag liquid mask area and the obtained second average depth of field corresponding to the slag mask area; if the calculated average height of the liquid level is within a preset range and the average thickness of the slag is greater than a preset thickness threshold value, calculating a first furnace feeding height and a first initial material raking height according to the average height of the liquid level and the average thickness of the slag;

This utility model relates to the field of metal material processing and treatment, and discloses a dual-purpose induction furnace for iron softening and zinc diffusion treatment, comprising: a furnace body; a top cover for sealing the furnace body, with a sealing rod fixedly connected to the bottom of the top cover; a bottom plate for the furnace body, with a base at the bottom of the bottom plate, a water outlet groove penetrating the bottom plate at the outermost side of the bottom plate, an annular sealing ring and a cover plate at the top of the water outlet groove, the sealing ring being located at the top of the cover plate, and an elastic element fixedly connected to the bottom of the cover plate; when the top cover is closed, the sealing rod contacts the sealing ring; an annular extrusion groove is formed at the bottom opening of the water outlet groove on the base, with a sealing ring fixedly connected to the top of the extrusion groove. In this utility model, the sealing ring and cover plate at the top of the water outlet groove and the sealing ring at the bottom of the water outlet groove simultaneously seal the water outlet groove, creating a sealing effect on both the upper and lower sides of the water outlet groove, improving the sealing performance of the furnace body and avoiding problems caused by poor sealing of the discharge port.

The utility model discloses a feeding device of a medium-frequency induction furnace, and relates to the technical field of medium-frequency induction furnaces. The electric induction furnace comprises a workbench, the top of the workbench is fixedly provided with an electric induction furnace body, one side of the workbench is fixedly connected with two vertical plates which are symmetrically distributed, a feeding cylinder is arranged between the two vertical plates, and guide assemblies are arranged between the feeding cylinder and the vertical plates. Sliding rails are fixedly connected to the top end of the workbench and located on the two sides of the electric induction furnace body. During feeding, a connecting rod moves upwards along with upward movement of a sliding block, meanwhile, the connecting rod, a guide rod and a second guide groove are driven to move synchronously, a second roller is driven through the second guide groove, meanwhile, a sliding plate and a protective cover are driven to move symmetrically towards the sides close to each other along the top of a sliding rail, the protective cover is closed, accurate discharging is facilitated, and meanwhile the working efficiency is improved. Molten metal is prevented from being splashed to the outer side of the device, and the personal safety of operators is further guaranteed.

The invention provides a vacuum induction furnace for metal smelting, which is applied to the technical field of vacuum induction furnaces, and is characterized in that the vacuum induction furnace comprises a rack and a shell fixed on the rack, the shell is internally provided with a smelting cavity and a forming cavity, and the smelting cavity and the forming cavity are both connected with a vacuum pump; an induction furnace body is rotationally arranged in the smelting cavity; a casting mold is arranged in the forming cavity, and a lifting mechanism for driving the casting mold to move between the smelting cavity and the forming cavity when the smelting cavity and the forming cavity are both in a vacuum state is arranged in the shell; the forming cavity is connected with a sealing door capable of being opened and closed; a sealing mechanism for keeping the smelting cavity in a vacuum state all the time is arranged between the smelting cavity and the forming cavity; the shell is further provided with a feeding mechanism for feeding materials when the smelting cavity is in a vacuum state. The continuous casting device has the technical effects that continuous operation of smelting, casting, cooling and material taking is realized, and the production efficiency is remarkably improved.

The invention relates to the technical field of casting equipment, and particularly discloses a camshaft casting continuous production device and method.The device comprises an electric induction furnace and a slag salvaging mechanism, and the electric induction furnace comprises a furnace body and a support arranged on the furnace body and close to a furnace opening; the slag salvaging mechanism comprises an outer sleeve rotationally connected with the support, a spiral conveyor coaxially arranged in the outer sleeve, and at least one intermittent slag collecting assembly, wherein one end of the outer sleeve extends into the furnace body from the furnace opening. A slag inlet and a slag outlet are formed in the outer sleeve in the axial direction at intervals, the intermittent slag collecting assembly is constructed to continuously collect dross in molten iron in the furnace body and extrude the dross into the outer sleeve from the slag inlet, and the spiral material conveying machine is constructed to continuously convey the dross from the slag inlet to the slag outlet and discharge the dross, so that the time difference between manual slag salvaging and connection of previous and later procedures is effectively solved; the continuity of casting production is guaranteed, and the production efficiency is improved to adapt to the large-scale production requirement; and meanwhile, the consistency of the deslagging degree is ensured through automatic deslagging operation, and the stability of the quality of the camshaft blank is improved.

The invention discloses an energy-saving smelting process for secondary aluminum production. The energy-saving smelting process comprises the following steps: pretreating raw materials; a medium-frequency induction furnace is used as a main smelting furnace; carrying out gradient heating smelting; and the low-consumption refining process comprises the steps that at the temperature of 660-670 DEG C, a composite refining agent is adopted, mechanical vibration is applied for refining and heat preservation casting, a three-stage waste heat utilization system of tail gas waste heat drying, combustion-supporting air preheating and ingot casting waste heat recycling is constructed, and the tail gas waste heat utilization rate is increased to 60% or above; the intermediate frequency furnace double-layer heat preservation design is matched with a closed-loop cooling system, the heat loss is reduced by 40%, the oxidation burning loss of molten aluminum is reduced through a gradient temperature rising strategy, energy is saved by 25%-30% compared with a traditional technology, the production cost is reduced by 15%-20%, raw material pretreatment is conducted through crushing, magnetic separation and classified batching, impurities are controlled from the source, and a composite refining agent is matched with mechanical vibration and vacuum degassing to cooperate, so that the production efficiency is improved. And the non-metal impurity removal rate is increased, the cast ingot purity is improved, the mechanical property is stable, and the high-end secondary aluminum application requirement is met.

This invention discloses a neutral refractory material for medium-frequency induction furnace linings. The raw materials include: 78-83 parts by weight of quartz sand, 5-7 parts by weight of fire clay, 5-7 parts by weight of fluorite, 0.8-1.2 parts by weight of alumina, 1.2-1.8 parts by weight of silicon carbide, and 0.3-0.7 parts by weight of calcium oxide. The preparation method is also disclosed. The method of this invention is simple, with the main components being quartz sand, fire clay, and fluorite, with quartz sand comprising the largest proportion. In addition, some additives such as alumina, silicon carbide, and calcium oxide are added to improve the refractory properties and chemical reactivity of the furnace charge. This results in a material with certain slag resistance and a good service life, exhibiting good overall performance and suitable for melting various metals. The furnace lining mixture is non-toxic, harmless, environmentally friendly, and pollution-free.

The invention relates to the technical field of metal product preparation, and discloses a manufacturing process of a high-strength wear-resistant alloy cast iron pan, which comprises the following steps: respectively carrying out magnetic separation impurity removal on a basic raw material and titanium powder, then carrying out vacuum roasting, cooling and discharging to respectively obtain pre-treated pig iron, pre-treated carbon steel and pre-treated titanium powder; preheating an induction furnace, adding the pretreated pig iron, and raising the furnace temperature until the pretreated pig iron is completely molten; then adding the pretreated carbon steel and the reinforced alloy, starting electromagnetic stirring, then adding the pretreated titanium powder, and continuously stirring after adding to obtain a melt; a composite inoculant is added into the melt and stirred, then molten iron is poured into a heat preservation launder for pouring, demolding is conducted after heat preservation, and a pot blank is obtained; the pot bottom and the pot body of the pot blank are subjected to partitioned cooling, then overall cooling and vibration aging treatment are conducted, and then natural cooling is conducted to the room temperature; and after the cooled pan blank is ground and polished, the pan blank is coated with a composite ceramic coating, and the high-strength wear-resistant alloy cast iron pan is obtained.

The invention relates to a high-temperature alloy with good high-temperature durability and a preparation method of the high-temperature alloy, and belongs to the technical field of aluminum-containing heat-resistant alloy materials. The high-temperature alloy material with good high-temperature durability is composed of the following elements in percentage by weight: 0.3%-0.6% of C, 0.5%-2.5% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 20%-30% of Cr, 1.0%-5.0% of Fe, 0.5%-3.0% of Al, 2.0%-8.0% of W, 0.01%-1.5% of Mo, 0.1%-1.0% of Co and the balance of Fe. 0.1% to 2.0% of Nb; the alloy comprises the following components in percentage by weight: 0.01%-0.15% of Zr, 0.01%-0.15% of Ti, 0.005%-0.5% of RE and the balance of Ni and inevitable impurities. The high-temperature alloy material with the good high-temperature durability is smelted in air through a medium-frequency induction furnace, is formed through centrifugal casting, and is compact in structure and excellent in high-temperature durability. The microstructure of the high-temperature alloy material with the good high-temperature durability is composed of austenite and carbide.

The application discloses a method for homogenizing a chemical synthetic multi-component alloy, and the method comprises the following steps: dissolving ammonium molybdate and ammonium tungstate in deionized water to obtain a mixed solution of ammonium molybdate and ammonium tungstate; dissolving polyethyleneimine in deionized water to obtain a polyethyleneimine solution; adding the polyethyleneimine solution into the mixed solution of ammonium molybdate and ammonium tungstate to uniformly disperse the precipitate; completely evaporating the solvent by using a rotary evaporation method to obtain a powder; performing secondary reduction on the powder to obtain a reduced powder; sintering the reduced powder in a graphite mold; heating the sintered product to 1500-1600 DEG C by using a medium-frequency induction furnace, extruding the sintered product on a horizontal extruder, naturally cooling the sintered product, and then annealing the sintered product at 1300-1400 DEG C. Compared with solid-state mixing, the method can save a mechanical alloying process and reduce sintering forming power in solidification forming; compared with liquid-phase mixing, the method can improve the uniformity of element mixing; compared with gas-phase mixing, the method can improve material utilization, reduce preparation cost and homogenization difficulty, and has no environmental pollution.

The invention discloses a high-toughness wear-resistant steel ball and a preparation process thereof, and belongs to the technical field of metal wear-resistant materials. A medium-frequency induction furnace is used for smelting molten steel, firstly, waste steel, ferroniobium, a carburant and carbon ferrochrome are mixed, heated and melted in the electric furnace, ferrosilicon, ferromanganese and nitrided ferrochrome are sequentially added after the molten steel is melted down, and the chemical composition and mass fraction of the molten steel in the furnace are controlled to be 0.73%-0.86% of C, 1.08%-1.27% of Si, 2.25%-2.38% of Cr, 0.04%-0.07% of Nb, 0.03%-0.05% of N and 1.17%-1.30% of Mn, 1t; 0.045% P, lt; 0.040% of S, and the balance Fe and inevitable impurities. The molten steel is continuously cast into square billets, the square billets are rolled into round steel on a rolling mill, finally, the round steel is machined into steel balls through a rolling or forging method, and the steel balls are subjected to step quenching of water quenching, air cooling and fog cooling to obtain high hardness, excellent wear resistance and good obdurability.

This invention discloses a medium-frequency induction furnace for manganese steel smelting, specifically relating to the field of manganese steel smelting technology. It includes an induction furnace, a first slag removal assembly, and a second slag removal assembly. The first slag removal assembly includes a guide plate disposed at the upper end of the induction furnace, capable of scraping slag off the sidewall of the furnace opening. The second slag removal assembly includes a slag removal component disposed at the upper end of the induction furnace, capable of scooping out slag from inside the furnace by rotation. The guide plate guides the flow of molten material inside the furnace, causing the slag to accumulate towards the center of the furnace. During the slag removal process, the slag removal component, through reciprocating motion, shakes off the molten steel carried out during slag removal. This invention, by using the guide plate to scrape away the slag adhering to the inner wall of the furnace opening, and then pushing the slag towards the center of the furnace before using the slag removal component to remove it, prevents the slag from solidifying and adhering to the furnace wall, thus avoiding incomplete removal of oxide slag.

The application discloses a method for producing zinc-aluminum-magnesium hot-dip galvanizing alloy in a cored induction furnace and relates to the technical field of zinc-aluminum-magnesium alloy production. The method innovatively proposes a sub-mother furnace segmented collaborative smelting process. The mother furnace is dedicated to the continuous melting and preliminary refining of pure zinc to ensure the high purity of the zinc liquid. The sub-furnace (tiltable cored induction furnace) is dedicated to the precise batching and alloying of aluminum and magnesium. The cored furnace is characterized by uniform electromagnetic stirring and precise temperature control, thereby realizing fine component regulation. This mode separately controls the melting of zinc and the preparation of alloy in different stages, thereby solving the bottleneck of single-furnace operation of the cored furnace, breaking through the capacity and component regulation limitations of single cored furnace production, and realizing continuous, efficient and precise production.

The invention discloses a method for preparing a high-performance rare earth magnesium-silicon-iron alloy through cooperation of pulsed magnetic field treatment and multi-element microalloying, and belongs to the technical field of metallurgy. The method comprises the following steps: smelting ferrosilicon-based alloy liquid in a submerged arc furnace; the base liquid is thermally loaded into a medium-frequency induction furnace, trace elements such as Ba, Sr, Sb and Bi are added in a cored wire feeding mode, and electromagnetic stirring is conducted to achieve multi-element microalloying; the alloy liquid is heated and then subjected to pulsed magnetic field treatment, the parameters are as follows: the magnetic field intensity is 0.5-3.0 T, the pulse frequency is 5-30 Hz, and the treatment time is 5-20 minutes; then adding magnesium and nitrogen under pressure and stirring; and finally, casting and quickly cooling under the protection of nitrogen. The solidification structure is refined through the pulsed magnetic field, the yield of microelements is increased through core-spun yarn feeding, the magnesium oxide content is reduced through nitrogen protection in the whole process, segregation is restrained through rapid cooling, the magnesium oxide content in the prepared alloy is smaller than or equal to 6% of the magnesium content, the macrosegregation degree is smaller than or equal to 0.3, and the average grain size is smaller than or equal to 50 micrometers. The alloy prepared through the method is good in spheroidizing stability, uniform in structure, low in cost and suitable for production of high-end nodular iron castings.

The utility model relates to the technical field of electric induction furnaces, in particular to a dust remover for a medium-frequency electric induction furnace, which comprises a furnace body, a feeding pipeline is arranged at the top of the furnace body, a furnace cover is rotatably mounted at the top end of the feeding pipeline, and mounting plates are fixedly mounted on the left side wall and the right side wall of the furnace body. An arc-shaped mounting rod is fixedly mounted on the upper surfaces of the two placement plates, an arc-shaped sliding opening is formed in the surface of the mounting rod, an arc-shaped sliding rod is fixedly mounted in the sliding opening, the sliding rod is slidably sleeved with a sliding block, a mounting plate is fixedly mounted on the surface of the sliding block, and a mounting opening is formed in the surface of the mounting plate; a fan is fixedly mounted in the mounting opening, and a smoke dispersing cover used for covering the mounting opening is fixedly mounted on the surface, away from the feeding pipeline, of the mounting plate. The angle of the fan can be quickly adjusted according to the drifting direction of flue gas and dust generated during feeding, so that the adsorption direction of the fan is matched with the drifting direction of the flue gas and the dust, and the dust removal applicability of the fan is improved.

A method for heating, in particular reheating, an intermediate strip when producing a flat strip, wherein the intermediate strip is heated using induction module heads of induction modules of an induction furnace, in particular of a rolling mill, preferably of a steel strip production system, and the induction module heads are mechanically positioned according to at least one current parameter of the intermediate strip at / in the induction furnace.

The utility model provides a device for smelting magnesium by utilizing the combination of a vacuum magnesium smelting furnace and a normal-pressure medium-frequency induction furnace, which comprises a powder spraying system, the normal-pressure medium-frequency induction furnace, the vacuum magnesium smelting furnace and a siphon system for connecting the normal-pressure medium-frequency induction furnace and the vacuum magnesium smelting furnace, the spraying device is used for spraying calcined white powder and a slag former into a ferrosilicon molten pool in the vacuum magnesium smelting furnace; the normal-pressure medium-frequency induction furnace is used for heating blocky silicon iron to form a silicon iron solution; the siphon system is used for siphoning the silicon iron solution in the normal-pressure medium-frequency induction furnace into the vacuum magnesium smelting furnace; and the vacuum magnesium smelting furnace is used for carrying out reduction reaction by utilizing the silicon iron solution, the calcined white powder and the slag former to produce magnesium steam. By utilizing the magnesium smelting device, the problems that continuous production cannot be realized, the automation degree is low, the efficiency is low and the like in the traditional magnesium smelting scheme can be solved.

The present application belongs to the technical field of special composite material preparation, and relates to a kind of fiber reinforced metal matrix composite material and its atmospheric pressure preparation process.Metal alloy matrix is added into induction furnace to heat to fully melt, and then cooled to solid-liquid mixed state;Alumina fiber surface is plated after cutting, put into induction furnace, and mechanically stirred to fully mix evenly;Temperature is raised and kept for matrix alloying, poured into mold, compacted and programmed cooling operation;Secondary temperature is raised and kept for subsequent aging treatment, and then naturally cooled to room temperature to obtain the product.The technical difficulties of large equipment required for preparing alumina composite material can be solved, the grain is refined, and the strength and density of the composite material are improved.The fiber content is controllable, and the composite configuration of particles and short, medium and long fibers is realized.The process is simple, the preparation cost is low, and special atmosphere protection is not required.

Induction furnace, method for operating, control program, and control device for an inducation furnace for heating planar rolled stock material made of metal. The rolled stock passes through the induction furnace in a longitudinal direction and extends transversely thereto from a first to a second rolled stock edge. The induction furnace has a plurality of module pairs which, viewed in the longitudinal direction, follow one another sequentially and each have a first and a second induction module. The induction modules, as viewed in the transverse direction, are positioned at a respective initial position, so that the first induction modules are arranged offset towards the first rolled stock edge and the second induction modules are arranged offset towards the second rolled stock edge. Induction modules are supplied with electrical power via respective power supply devices. A respective electrical target variable is defined for each induction module.

The present patent of invention relates to aluminium-graphene nanocomposites with high electrical and thermal conductivity, and methods for obtaining same via microstructural control, and more specifically to the incorporation of multilayer graphene nanoplatelets (mGNP or few-layer graphene), comprising up to 10 layers, into pure commercial aluminium or aluminium alloys, using electric furnaces. The nanocomposites obtained comprise an aluminium matrix with dispersed graphene as the reinforcing phase, in proportions ranging from 0.1 wt% to 3 wt%. In order to obtain the nanocomposites, gravity casting techniques were employed in resistive and induction furnaces, with adaptations to prevent oxidation through the use of an inert gas atmosphere. The methodology employed enables a significant increase in electrical conductivity, ranging from 45% to 95% relative to the as-received commercial material, depending on the amount of graphene added. The thermal diffusivity of the nanocomposites also increased by 15% to 50%, with a possible maximum of around 0.5 wt% to 1 wt% of graphene. Similarly, the general physical properties exhibited marked improvements, although the rate of improvement decreased for nanocomposites containing more than 2 wt% of graphene.

This invention belongs to the field of brazing materials technology, specifically disclosing a copper-based brazing filler metal for CBN tools, its preparation method, and its application. The copper-based brazing filler metal comprises: 15.0%–20.0% manganese, 1.0%–3.0% nickel, 1.0%–1.8% chromium, 6.0%–9.0% titanium, with the balance being copper, and the total amount of impurity elements is less than 0.3%. The preparation method includes: placing metallic copper, metallic manganese, metallic nickel, metallic chromium, and metallic titanium in a vacuum medium-frequency induction furnace for melting and mixing. After the raw materials are melted and mixed evenly, a refining agent is added for refining to obtain an alloy melt; the alloy melt is then atomized in vacuum using an inert gas to obtain alloy powder; the alloy powder is mixed with a dispersant under vacuum conditions of 45–60°C to obtain copper-based alloy powder. The copper-based brazing filler metal of this invention has advantages such as high purity, high bulk density, low melting point, good wettability, higher bonding strength, and good hardness and wear resistance.