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Vacuum brazing equipment and method for plate-fin heat exchanger
ActiveCN119589044AUniform temperatureImprove heating efficiencyHeat exchange apparatusMetal working apparatusDistributed structurePlate fin heat exchanger
The invention discloses vacuum brazing equipment and method for a plate-fin heat exchanger, relates to the field of welding, and aims to solve the problems of low heating efficiency and difficulty in deformation control caused by structural characteristics of the plate-fin heat exchanger and characteristics of vacuum radiation heating at present. Structures such as a hydraulic control system, an upper water-cooling sealing conductive pressure head, a lower conductive base and a tool are added on the basis of traditional vacuum brazing equipment, the structures are compounded with a furnace pipe, an upper electrode of the upper water-cooling sealing conductive pressure head is of a distributed structure and can move up and down through the hydraulic control system, and the upper electrode of the lower water-cooling sealing conductive pressure head can move up and down through the tool. And by matching with a tool, a workpiece can be always stressed uniformly, and continuous and stable self-resistance extremely-fast heat generation electrifying can be ensured. Double-feedback series control is adopted to achieve double-heat-source heating, the heating process time is shortened, a pressure-temperature coupling control method is adopted, it is ensured that stress is uniform, deformation is reduced, and the heating efficiency and the welding quality consistency are improved. And rapid and uniform heating and small deformation control of the workpiece can be realized.
Owner:BEIJING RESEARCH INSTITUTE OF MECHANICAL & ELECTRICAL TECHNOLOGY CO LTD CAM
Plasticity-enhanced lead lanthanum zirconate tin titanate-based antiferroelectric ceramic and preparation method thereof
ActiveCN119118662Ahigh phase change electric fieldImprove energy storage efficiencyFixed capacitor dielectricStacked capacitorsElectrical field strengthLanthanum
The invention relates to plasticity-enhanced lead lanthanum zirconium tin titanate-based antiferroelectric ceramic and a preparation method thereof. The chemical formula of the zirconium tin lead titanate lanthanum-based anti-ferroelectric ceramic is (Pb < 0.975-x > La < 0.02 > Sr < x >) (Zr < 0.5 > Sn < 0.37 > Ti < 0.13 >) < 0.9975 > O < 3 >, x is smaller than or equal to 0.10; and sintering by adopting a flash sintering technology to prepare the plasticity-enhanced lead lanthanum zirconate tin titanate-based antiferroelectric ceramic. Wherein the initial electric field intensity is set to be 100-300 V / cm, and the temperature rise rate of the flash sintering furnace body is 5-15 DEG C / min; when the reading of the current detector reaches the order of magnitude of [mu] A, the electric field intensity is increased to 200-500V / cm; after the current density value reaches 10-30 mA / mm < 2 >, the stable current density is kept for 90-200 s; preferably, the temperature rise rate of the flash burning furnace body is 8-12 DEG C / min.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Preparation method of high-magnetic-induction oriented silicon steel
PendingCN119144804AShorten annealing treatment timeIncreased diffusion rateSolid state diffusion coatingProcess efficiency improvementMolten steelSteel belt
The invention discloses a preparation method of high-magnetic-induction oriented silicon steel, which comprises the following steps: sequentially heating, roughly rolling, finely rolling and coiling a plate blank obtained by continuously casting qualified molten steel to obtain a hot-rolled coil; the hot-rolled coil is sequentially subjected to normalizing treatment and cold rolling, and a cold-rolled sheet is obtained; the cold-rolled sheet is sequentially subjected to decarburization and nitriding, and the high-magnetic-induction oriented silicon steel is obtained; in the nitriding process, the nitriding temperature is 910-980 DEG C, and the dew point is 10-60 DEG C. A 910-980 DEG C high-temperature nitriding method is adopted, the diffusion efficiency of N atoms in the steel strip is improved, the uniformity of the N concentration in the thickness direction is improved, the secondary recrystallization quality and the thickness consistency of a magnesium silicate bottom layer can be improved, meanwhile, the heating rate can be properly increased during high-temperature annealing, and the high-temperature annealing time is shortened.
Owner:SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
Preparation method of high-density solid electrolyte and lithium battery
InactiveCN119627201AReduce the temperatureshort holding timeLi-accumulatorsElectrolyte accumulators manufactureSolid state electrolyteHigh density
The invention relates to a preparation method of a high-density solid electrolyte. The preparation method comprises the following steps: providing oxide electrolyte powder; pressing the oxide electrolyte powder into a green body; the green body is heated to 900-1300 DEG C, and then heat preservation is conducted for 0-30 min; and cooling the green body to at least 60 DEG C, and keeping the temperature for 2-30 hours to obtain the high-density solid electrolyte. According to the method, the green body is subjected to two-stage heat treatment, the heat treatment temperature of the first stage is 900-1300 DEG C, the temperature of the first stage is high, and the main change of the green body is grain boundary rapid migration and grain size growth. And after the second section is reduced by at least 60 DEG C, the temperature is reduced, the grain size does not grow quickly any more, and the main change of the green body is diffusion mass transfer among grains, air hole discharge and densification completion. The solid electrolyte with high density can be prepared through the method, and compared with a traditional electrolyte sintering method, the temperature of the heat preservation stage with the longest time consumption is reduced, and energy consumption is reduced.
Owner:DONGFENG MOTOR GRP
High-strength high-thermal-conductivity silicon carbide composite material and preparation method thereof
The invention relates to a high-strength and high-thermal-conductivity silicon carbide composite material and a preparation method thereof. According to the technical scheme, silicon carbide fine powder, diamond powder, monatomic silicon powder, nano-copper powder, nano-graphite powder and a sintering aid serve as raw materials, deionized water is added, the raw materials are mixed and placed in a spray dryer for spray drying, and a mixture I is obtained; mixing the mixture I with a polyvinyl alcohol aqueous solution to obtain a mixture II; and putting the mixture II into a mold, carrying out compression molding, and maintaining the pressure to obtain a silicon carbide composite material green body. The silicon carbide composite material green body is placed in a graphite crucible, then the graphite crucible is placed in a vacuum induction furnace, and heating and heat preservation are conducted under the vacuum condition; and heating, preserving heat and cooling to obtain the high-strength and high-thermal-conductivity silicon carbide composite material. The preparation process is low in energy consumption, and the prepared high-strength and high-thermal-conductivity silicon carbide composite material is high in bending strength, fracture toughness and thermal conductivity.
Owner:WUHAN UNIV OF SCI & TECH
A cooking reservation method, device, equipment and storage medium
The present invention discloses a cooking reservation method, device, equipment and storage medium. The method comprises: obtaining environmental parameters and attribute information of ingredients to be cooked; the environmental parameters and the attribute information are both related to the rate of change of the temperature of the ingredients to be cooked; obtaining a heat dissipation coefficient corresponding to the environmental parameters and the attribute information from a pre-acquired heat dissipation model; determining the heat dissipation time from the completion of cooking of the ingredients to be cooked to the heat dissipation to the set temperature based on the heat dissipation coefficient; determining the cooking start time according to the working time of the cooking equipment and the heat dissipation time. The present invention obtains the heat dissipation coefficient related to the environmental parameters and the attribute information of the ingredients to be cooked, and then obtains the time required for heat dissipation, thereby selecting a reasonable time to start the equipment, so that the user's required set temperature is reached at the end of the reservation, the heat preservation time is reduced, the purpose of energy saving is achieved, and the heat preservation time is too long to affect the taste of food.
Owner:GUANGDONG MIDEA CONSUMER ELECTRICS MFG CO LTD
Cold rolling process of aluminum-based silicon carbide coil stock
PendingCN121945554Ashort holding timeGuaranteed continuityMetal rolling arrangementsCarbide siliconTemperature control
The invention discloses a cold rolling process of an aluminum-based silicon carbide coil material. The cold rolling process comprises the following steps: carrying out surface treatment and coiling on a hot-rolled coil material; after the protective film is removed online, cold rolling-annealing I circulation is conducted, the single-pass rolling reduction of cold rolling is 5%-10%, the unit tension is 10%-30% of the yield strength of the material, the speed is smaller than or equal to 15 m / min, heat preservation is conducted for 1-2 h at the temperature of 430-480 DEG C in annealing I, and the heating and cooling rate is smaller than or equal to 10 DEG C / min; then edge cutting is carried out to remove edge cracks; the heating and cooling rate of the annealing II is smaller than or equal to 8 DEG C / min, and the heat preservation time is shorter than that of the annealing I; performing surface treatment after annealing II; and finally, finished product cold rolling is conducted, the single-pass rolling reduction is 5%-8%, and the speed is 5-10 m / min. By means of optimized multi-pass small rolling reduction rolling, staged temperature control annealing and tension control, the technical problem that the aluminum-based silicon carbide composite material is prone to cracking and strip breakage in the continuous cold rolling process is solved.
Owner:JIANGYIN KANGRUI MOLDING TECH CO LTD
Cooling method of P92 steel ingot
ActiveCN119609103Aefficient releasequick releaseFurnace typesProcess efficiency improvementIngotHeat conservation
The invention relates to a cooling method of a P92 steel ingot, which comprises the following steps of: performing simulation analysis on the cooling process of the demoulded P92 high-alloy large steel ingot according to different process parameters, quantitatively researching the change rule of an internal temperature field of the steel ingot, and formulating an economic and efficient cooling medium of air cooling according to a simulation result to implement regulation type air cooling on the demoulded steel ingot. The steel ingot is scientifically and efficiently cooled, the product quality can be guaranteed, the uniform heat preservation time of the P92 large steel ingot in the heat treatment furnace is effectively shortened, the cooling efficiency of the P92 steel ingot in the heat treatment furnace is effectively improved, and the uniform heat preservation and cooling time of the P92 steel ingot in the heat treatment furnace is shortened by more than 50 hours from the original time, namely the service time of the heat treatment furnace is shortened by about one third.
Owner:INNER MONGOLIA NORTH HEAVY INDS GROUP
A high-alloy steel electroslag ingot and a method of homogenizing the same
A high-alloy steel electroslag ingot and its homogenization method are provided, comprising the following steps: S1, electroslag ingot pretreatment: removing surface oxide scale and crack defects, and grinding to a surface roughness Ra≤6.3μm; S2, staged heating: heating to 800-900℃ at a rate ≤100℃ / h and holding for 2-6h; heating to 1000-1100℃ at a rate ≤100℃ / h and holding for 2-6h; heating to 1200-1300℃ at a rate ≤150℃ / h and holding for 10h. -20h; S3, Stepped cooling: Turn off the heating device and cool with the furnace to 800-1000℃, hold for 2-6h; cool to 500-650℃ at a rate of ≤50℃ / h, hold for 2-6h; open the furnace door and introduce cooling air at a speed of 0.5-3m / s to cool to room temperature, obtaining homogenized high-alloy steel electroslag ingots; S4, Post-homogenization testing: the relative standard deviation of each alloying element is ≤5%; the average grain size is ≤10μm; the Brinell hardness fluctuation range is ≤15HBW. This invention eliminates component segregation, refines grain structure, optimizes process parameters, is highly efficient and energy-saving, easy to promote, and has strong practicality.
Owner:CHINA RAILWAY BAOJI BRIDGE GROUP CO LTD
A cold-rolled low alloy steel strip and a method for producing the same
The application belongs to the technical field of steel and iron, and particularly relates to a cold-rolled low-alloy steel strip and a preparation method thereof. The cold-rolled low-alloy steel strip contains the following chemical components in percentage by weight: C: 0.06%-0.09%, Si: 0.10%-0.30%, Mn: 1.20%-1.50%, S: <=0.010%, P: <=0.020%, Nb: 0.004-0.010%, Alt: 0.020%-0.050%, and the rest is iron and inevitable impurities. The preparation method comprises the following steps: hot-rolling raw material, pickling, cold-rolling, cover annealing, flattening, inspection, and warehousing. The cold-rolled low-alloy steel strip obtained by the application has a yield strength of >=305 MPa, a tensile strength of >=440 MPa, and an elongation of >=29%.
Owner:SHANDONG IRON & STEEL CO LTD +1
Large-size boron carbide-graphene composite ceramic as well as preparation method and application thereof
ActiveCN119591408Aachieve densificationIntegrity guaranteedNuclear energy generationComposite ceramicGraphite
The invention discloses a large-size boron carbide-graphene composite ceramic as well as a preparation method and application thereof. The large-size boron carbide-graphene composite ceramic has high compactness and a uniform microstructure, the size of the large-size boron carbide-graphene composite ceramic is 17-22 cm, the density of the large-size boron carbide-graphene composite ceramic is 2.502-2.518 g / cm < 3 >, the Vickers hardness of the large-size boron carbide-graphene composite ceramic is 31.5-33.8 GPa, the bending strength of the large-size boron carbide-graphene composite ceramic is 462-536 MPa, and the fracture toughness of the large-size boron carbide-graphene composite ceramic is 3.86-4.73 MPa.m < 1 / 2 >. The boron carbide-graphene composite ceramic prepared by adopting an HP and SPS dual-mode sintering mode is fine in grain, and the graphene structure is complete, so that the improvement of the mechanical property of the material is facilitated. Meanwhile, the method is simple in process, good in repeatability and high in stability, and industrial and batch stable production is easy to achieve.
Owner:CHINA HUBEI LONGZHONG LABORATORY
A method for rapid high strength microwave bonding of ceramics to cemented carbide
This invention discloses a rapid, high-strength microwave bonding method for ceramics and cemented carbide, belonging to the field of ceramic material bonding technology. The method includes the following steps: preparing a metal solder; grinding, polishing, and cleaning the bonding surfaces of the ceramic and cemented carbide respectively; loading the prepared metal solder into a mold and pressing it under uniaxial pressure to obtain a metal solder sheet; placing the ceramic, metal solder sheet, and cemented carbide in a stacked structure in a microwave sintering furnace for microwave sintering to achieve the bonding of the ceramic and cemented carbide. Compared with traditional brazing and diffusion welding, this ceramic-cemented carbide microwave bonding method increases the heating / cooling rate by 6-10 times, improves the single-furnace bonding efficiency by 5-9 times, allows for mass production, and yields ceramic-cemented carbide bonding interfaces with high strength. This invention significantly improves production efficiency, reduces energy consumption, and has widespread application value.
Owner:NANJING UNIV OF SCI & TECH
Rapid insulation clamp for communication cable
ActiveCN222338930UAchieve clampingshort holding timeElectrical apparatusGear wheelElectrical and Electronics engineering
Owner:SUZHOU TENGDAO AUTOMATION EQUIP CO LTD
Preparation method of shell containing multi-angle special-shaped pipe cavity
ActiveCN119657829AGuaranteed dimensional accuracyCooperate accuratelyFoundry mouldsFoundry coresPipeDimensional precision
The invention provides a preparation method of a shell containing a multi-angle special-shaped pipe cavity, which comprises the following steps: combining and assembling a mold core and a plurality of block wax molds, so that the mold core is arranged in the multi-angle special-shaped pipe cavity defined by the plurality of block wax molds, partial areas of at least partial pipe bodies of the mold core are the same as the inner diameters of the multi-angle special-shaped pipe cavities in the corresponding positions so as to be precisely matched, and the rest partial areas of at least partial pipe bodies are arranged in the multi-angle special-shaped pipe cavities in a suspended mode to obtain a casting wax film; a surface layer shell and a back layer shell are prepared on the surface of a casting wax film in sequence, and then sectional continuous dewaxing roasting is adopted to prepare the shell. According to the invention, a multi-dimensional matching relationship is formed by the plurality of pipe bodies distributed at multiple angles of the mold core and the block wax mold, so that the accurate matching of the block wax mold and the mold core is ensured, and the dimensional accuracy of the inner cavity of a later casting can be ensured by utilizing the dimensional accuracy of the mold core.
Owner:BAIMTEC MATERIAL CO LTD
A vacuum brazing method for a conical honeycomb inner ring assembly
The application discloses a kind of vacuum brazing methods of conical honeycomb inner ring assembly, S1: make the conical honeycomb ring of interference fit with the inner surface of support piece, the length interference amount of honeycomb ring is 1-3mm;S2: polishing cleaning;S3: filling adhesive tape brazing material;S4: honeycomb positioning and spot welding;S5: honeycomb brazing;The application does not need to clamp positioning tool, and the clearance between honeycomb ring and support piece during assembly and brazing process is guaranteed by process combination, and the brazing rate of more than 95% of the conical honeycomb inner ring assembly can be obtained by once brazing;Excess honeycomb is used, and the honeycomb interference amount is evenly distributed on the support piece by the center alternating spot welding fixing mode, to form pressure stress on the support piece;Vacuum brazing is carried out by short-time holding and slow cooling process combination, and the synchronous shrinkage of honeycomb and support piece during cooling process is guaranteed by slow cooling process, to reduce the possibility that honeycomb is forced to separate from support piece;At the same time, the holding time is appropriately shortened, so that the time of brazing material above liquidus temperature is reduced, and the corrosion of brazing material to honeycomb is avoided.
Owner:HANGFA EXCELLENT MATERIALS (ZHENJIANG) ADDITIVE MFG CO LTD
Micro-channel heat exchange device based on high-entropy alloy connection and preparation method and application of micro-channel heat exchange device
PendingCN122083755ASufficient dimensional accuracylow connection temperatureIndirect heat exchangersHeat exchanger casingsMetallurgyHigh entropy alloys
The invention provides a micro-channel heat exchange device based on high-entropy alloy connection and a preparation method and application of the micro-channel heat exchange device. According to the micro-channel heat exchange device, the connection quality of the joints of all layers of the micro-channel heat exchange device is improved, the tensile strength, the corrosion resistance and the hydrogen embrittlement resistance are improved, and the compactness, the corrosion resistance and the hydrogen embrittlement resistance of the fluid contact surface in the micro-channel heat exchange device are improved; the strength, the corrosion resistance and the hydrogen embrittlement resistance of the micro-channel heat exchange device are integrally improved, so that the micro-channel heat exchange device based on high-entropy alloy connection is suitable for places with high requirements for the space utilization rate and the reliability such as a hydrogen refueling station, and is particularly applied as a micro-channel heat exchanger of a hydrogen cooling system of the hydrogen refueling station.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
A steel for hydroelectric engineering and a method for producing the same
This invention discloses a type of steel for hydropower engineering and its preparation method. The steel comprises the following chemical components: C, Mn, Si, Alt, Nb, V, Ti, Cr, Ni, Mo, Cu, and B. Its yield strength is ≥950 MPa, tensile strength is ≥1000 MPa, and it exhibits excellent load-bearing capacity, meeting the structural material requirements for high-stress conditions in large-scale hydropower projects. Its impact value at -40℃ is ≥200 J, and its aging impact value at -40℃ is ≥200 J, demonstrating excellent low-temperature toughness and aging stability. It exhibits outstanding resistance to low-temperature brittle fracture and long-term service embrittlement, providing strong service safety and durability. It is suitable for critical load-bearing structures in hydropower projects operating in cold, high-stress, and long-term service conditions.
Owner:新余钢铁股份有限公司
A method for leaching lithium from agglomerated transformed lithium clinker stock
The present application relates to the technical field of limestone lithium extraction, and particularly relates to a method for extracting lithium by transforming granulation into lithium clinker stacking and leaching, and the method comprises a water adding and grinding process.The present application has the beneficial effects of reducing grinding time, saving leaching time and reducing energy consumption.
Owner:XINJIANG RES INST OF NON FERROUS METALS
A kind of die-casting aluminum alloy and its preparation method and application
ActiveCN118756010Bhigh strengthRaise the ratioProcess efficiency improvementMetallic materialsToughness
The present invention discloses a die-cast aluminum alloy and a preparation method and application thereof, and belongs to the technical field of metal materials. The die-cast aluminum alloy provided by the present invention is composed of the following components in mass percentage: 10.5-13% Si, 0.4-0.8% Fe, 0-0.45% Mn, 0.25-0.45% Mg, 0.06-0.1% Ti, 0.05-0.12% Zr, 0.005-0.01% B, 0.015-0.03% Sr, and the remainder is impurity elements and Al; the sum of the mass percentages of Mn and Fe is 0.7-0.9%. The present invention is based on Al-Si alloy, designs a higher Fe content, and prepares a die-cast aluminum alloy with good casting formability and high strength and toughness through the composition optimization design of the main alloy components of Si, Fe, and Mg and the trace elements of Ti, B, Sr, Zr, and Mn.
Owner:GUANGDONG INST OF NEW MATERIALS +1
A method for preparing a nitride ceramic phase reaction precipitation strengthened high entropy alloy
The present invention relates to the technical field of alloy preparation, and specifically discloses a method for preparing a nitride ceramic phase reaction precipitation strengthening high entropy alloy, which is specifically: urea and CoCrFeMnNi high entropy alloy powders of a certain mass ratio are ball-milled and mixed, and a nitride ceramic phase is precipitated by in-situ reaction by rapid hot pressing sintering, and Ar is introduced as a protective gas during the sintering process, and a nitride ceramic phase reaction precipitation strengthening high entropy alloy is obtained after hot pressing sintering. The nitride ceramic phase reaction precipitation strengthening high entropy alloy prepared by the present invention significantly improves the strength of the CoCrFeMnNi high entropy alloy and retains a relatively high plasticity, thereby improving the application potential of the alloy as a high-performance structural material under various complex working conditions.
Owner:SOUTHWEST JIAOTONG UNIV
Production process for online solid solution of stainless steel plate
PendingCN119571027Ashort holding timeReduce energy consumptionHeat treatment process controlProcess efficiency improvementTemperature controlMetallurgy
The invention discloses a production process for online solid solution of a stainless steel plate. Comprising the steps of heating, rolling, on-line chamber type furnace uniform-temperature softening and on-line solid solution. Wherein the temperature of the rolled steel plate is 850-1050 DEG C; the rolled steel plate is subjected to heat compensation in an online chamber type furnace to reach the solid solution temperature of 1050-1150 DEG C, the heat preservation time is 90-750 s, the surface temperature difference is controlled to be + / -15 DEG C, work hardening is eliminated, and component homogenization is achieved; and after heat preservation is completed, the steel plate is cooled to 50-120 DEG C in an immersed quenching machine. The production cost advantage is obvious, the production energy consumption is reduced by 20% or above compared with a traditional process, and the popularization prospect is wide.
Owner:HUATIAN ENG & TECH CORP MCC +1
Heat treatment method for eliminating high alloy steel forging network carbide
The invention relates to a heat treatment method for eliminating high alloy steel forging network carbides, and belongs to the technical field of heat treatment. The method comprises the following steps: heating a high-alloy forged steel billet to 1050-1065 DEG C at a heating rate of 5-15 DEG C / min, and keeping the temperature for 20-30 minutes; heating to a preset temperature of 1120-1160 DEG C at a heating rate of 1-3 DEG C / min, and keeping the temperature for 5-10 minutes; and finally, cooling to room temperature at the speed of 1.5-20 DEG C / s. Compared with a traditional high-temperature treatment method for eliminating carbides, network carbides distributed along the grain boundary after forging are completely eliminated on the premise that the small grain size is guaranteed through the sectional type heat preservation and high-temperature slow heating technology, the heat preservation time in the high-temperature stage is short, energy consumption can be saved, and the production cost can be reduced.
Owner:KUNMING UNIV OF SCI & TECH
Preparation method and application of crystalline silicon solar cell having shallow junction diffusion emitter
PendingEP4386874A4promote absorptionSpeed up the conversion processFinal product manufactureSemiconductor devicesElectrical batteryCrystalline silicon
The present application provides a preparation method and application of a crystalline silicon solar cell having a shallow junction diffusion emitter. The preparation method comprises a diffusion process and a chain oxidation process, the diffusion process comprises low temperature diffusion and high temperature propulsion, and the chain oxidation process comprises high-temperature chain oxidation. According to the present application, firstly, a low-doped diffusion shallow junction having a depth of 0.15 um is prepared by means of optimization of the diffusion process, and doping with a certain dose concentration is formed on the surface of a diffusion layer by using photon thermal activation radiation energy of high-temperature chain oxidation, so as to solve the mismatch problem of alloy ohmic contact subsequently formed with silver paste, and finally, the photoelectric conversion efficiency is improved to a high degree.
Owner:HENGDIAN GRP DMEGC MAGNETICS CO LTD
High-strength and high-conductivity copper-iron alloy wire heat treatment equipment and treatment method
PendingCN119410886APromote precipitationfast heatingApparatus for heat treatmentReduction of cables/conductors sizeWire rodHeat conservation
The invention relates to heat treatment equipment for a high-strength and high-conductivity copper-iron alloy wire. The heat treatment equipment comprises a wire drawing die, an outer guide roller, a machine shell, a recovery mechanism and a rapid thermal annealing mechanism, the rapid thermal annealing mechanism is arranged in the machine shell, the outer guide rolling wheel is arranged on the left side of the machine shell, the outer guide rolling wheel is arranged on the right side of the machine shell, and the recycling mechanism is arranged on the right side of the outer guide rolling wheel. The wire drawing die is arranged on the left side of the outer guide roller; and a wire is discharged from the wire drawing die, enters the rapid thermal annealing mechanism of the shell through the outer guide roller, and is connected to the recovery mechanism through the outer guide roller. The high-strength and high-conductivity copper-iron alloy wire heat treatment equipment and the treatment method aim at overcoming existing defects, and the problems that traditional aging annealing is low in heating speed and long in heat preservation time, and the whole preparation process is long in consumed time are solved.
Owner:WUXI BLUE GREEN METAL MATERIAL TECH CO LTD
A high thermal conductivity sintered silicon carbide ceramic material and a method for making the same
The application belongs to the technical field of inorganic nonmetallic materials, and relates to a high-thermal-conductivity spark plasma sintering silicon carbide ceramic material and a preparation method thereof. The application discloses a high-thermal-conductivity spark plasma sintering silicon carbide ceramic material, and raw materials of the high-thermal-conductivity spark plasma sintering silicon carbide ceramic material, according to mass percentage, include 85-98 wt.% of submicron silicon carbide powder, 0.01-2 wt.% of micron silicon carbide powder, 1-10 wt.% of rare earth oxide, 0.5-3 wt.% of magnesium oxide, 0.01-2 wt.% of carbon and 0.5-2 wt.% of dispersant. The application further discloses a preparation method of the high-thermal-conductivity spark plasma sintering silicon carbide ceramic material. The application adds magnesium oxide as a second sintering aid on the basis of a raw material system taking submicron silicon carbide powder as raw material and rare earth oxide as a sintering aid, significantly reduces the eutectic point and viscosity of a liquid phase, can effectively promote the mass transfer efficiency in the sintering process, improves the densification and grain growth efficiency, and thus improves the thermal conductivity of the SiC ceramic.
Owner:QIANWAN INST OF CNITECH +1
Processing technology of steel strip for preparing high manganese austenite low temperature steel flux-cored welding wire
ActiveCN116024413Bavoid breakingReduce residual stressProcess efficiency improvementMetal rolling arrangements
The invention relates to a processing technology for preparing a steel strip for high manganese austenite low temperature steel flux-cored welding wire. The technical scheme comprises the following steps: polishing and grinding a high manganese austenite low temperature steel hot rolled strip, cold rolling, welding and coiling the strip; then performing four annealing heat treatments and cold rolling, and finally performing one annealing heat treatment: the temperatures (°C) of the five annealing heat treatments are 950-1080, 980-1100, 970-1060, 950-1040, 980-1020, the heat preservation time is 0.5-1.0 hour, and the protective atmosphere is hydrogen; the cooling rates (°C / min) are 100-120, 120-140, 140-160, 240-260, 280-300, the thicknesses (mm) of the four cold rollings are 1.5-2.3, 0.8-1.5, 0.6-0.8, 0.4-0.6, and trimming is performed to obtain a steel strip for preparing a high manganese austenite low temperature steel flux cored welding wire. The invention has simple ingredients, low powder filling rate and high production efficiency. The manufactured product is suitable for all high manganese austenite low temperature steel flux cored welding wires and meets the technical requirements for preparing high manganese austenite low temperature steel matching flux cored welding wires.
Owner:DANYANG KAIXIN ALLOY MATERIAL CO LTD +1
A smelting process and apparatus for a semi-solid non-dendritic slurry of rare earth AS-based magnesium alloy.
PendingCN122081712ARealize the synergistic effect of compound metamorphismImprove refinementComplex mathematical operationsSmelting processSemi solid
This invention relates to the field of magnesium alloy smelting technology, and in particular to a smelting process and apparatus for a semi-solid non-dendritic slurry of rare earth AS-based magnesium alloy. Using AS magnesium alloy as the base material and a Ce-La-Nd ternary rare earth mixture as the rare earth modifier, the process involves vacuum melting, electromagnetic stirring, and stepped cooling to obtain an ingot. A three-dimensional curve is plotted based on the JMAK equation to determine the critical temperature. Using a rheological casting apparatus, through internal cooling gradient, stirring-assisted slurry preparation, and ultrasonic-assisted isothermal treatment, combined with three-level quality judgment and defect closed-loop adjustment, a slurry with controllable liquid phase content, fine and rounded grains, and uniform rare earth distribution is prepared. The process exhibits high repeatability and meets the requirements of high-end semi-solid forming.
Owner:JINGGANGSHAN UNIVERSITY
A rolling method of isotropic ta22 titanium alloy sheet
ActiveCN121607407Breduce defectsIncrease productivityFurnace typesWork cooling devicesChemical industryTitanium alloy
The application discloses a rolling method of isotropic TA22 titanium alloy sheet, which comprises the following steps: one, first fire rolling by stage heating; two, cutting and quenching; three, second fire rolling; four, cutting; five, third fire rolling; six, cutting and external cladding with a ladle cover; seven, cladding and stacking rolling; eight, finished product heat treatment, to obtain the TA22 titanium alloy sheet. The preparation method adopts the process of one fire rolling + quenching + two fire rolling + cladding and stacking rolling + finished product heat treatment, and combines with the control of rolling direction changing and the temperature and pass deformation rate in each rolling process, so that the plate is fully and uniformly deformed; the heat treatment mode of furnace cooling + air cooling is adopted, so that the plate is fully recrystallized, the plate deformation caused by direct cooling after heat treatment of the plate is avoided, the TA22 titanium alloy sheet with fine and uniform structure, high size uniformity and high isotropy is obtained, and the TA22 titanium alloy sheet is suitable for fields of ships, machinery, chemical industry, petroleum and the like.
Owner:WESTERN TITANIUM TECH
High-capacity battery and shell thereof
PendingCN119092912AEnsure consistencyimprove consistencyFinal product manufactureSecondary cellsElectrical batteryBattery cell
The invention relates to the field of batteries, in particular to a high-capacity battery and a shell thereof. The problem that an existing large-capacity battery sharing pipeline assembly is difficult to assemble is solved. The high-capacity battery comprises a shell and a plurality of single batteries, and the single batteries are sequentially connected in parallel and arranged in an inner cavity of the shell; the shell comprises a cylinder, a first cover plate and a second cover plate; an electrolyte sharing cavity is formed in the first cover plate, and the first cover plate covers the open end of the bottom of the barrel and is in sealed connection with the open end; the electrolyte sharing chamber is communicated with the electrolyte area of the inner cavity of each single battery; the second cover plate is provided with a third through hole through which each single battery pole can extend out; the second cover plate covers the open end of the top of the cylinder and is in sealed connection with the open end. And each single battery pole extends out of the third through hole, and the shell area corresponding to the third through hole is fixedly sealed with the single battery shell. The electrolyte sharing cavity does not need to be connected in an inserted mode, the requirements for machining precision and assembling precision are low, and batch production can be achieved.
Owner:D AUS ENERGY STORAGE TECH (XIAN) CO LTD
Rapid pressureless sintering preparation method of broadband high-transparency AlON ceramic
The invention relates to a rapid pressureless sintering preparation method of broadband high-transparency AlON ceramic, and belongs to the field of transparent ceramic material preparation. The preparation method comprises the following steps: ball-milling and mixing Y2O3 raw material powder and AlON raw material powder to obtain AlON / Y2O3 mixed powder; then carrying out pressure forming on the AlON / Y2O3 mixed powder to obtain a green body; and finally, the blank is subjected to pressureless sintering, the broadband high-transmittance AlON transparent ceramic is obtained, Y2O3 powder in the AlON / Y2O3 mixed powder is integrally and uniformly distributed in the mixed powder in the form of a single particle and a cluster composed of 2-5 and 6-60 single particles, and the mass of the Y2O3 powder in the form of the cluster composed of 6-60 single particles accounts for 50%-80% of the mass of the Y2O3 raw material powder. The method is simple to operate, short in pressureless sintering heat preservation time, high in efficiency, good in energy-saving effect and low in cost, and the prepared AlON ceramic has the characteristic of high transmittance in visible and infrared bands, and is suitable for industrial production.
Owner:DALIAN MARITIME UNIVERSITY