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56results about How to "Reduce internal defects" patented technology

Film layer structure for improving UV attenuation of TOPcon battery

The invention relates to the technical field of solar cells, in particular to a film layer structure for improving UV attenuation of a TOPcon cell. In order to improve the passivation effect of the front face of the TOPCon cell, an aluminum oxide passivation layer is generally arranged on the surface of a BSG layer on the front face of the TOPCon cell, but the aluminum oxide passivation layer is poor in ultraviolet resistance and prone to being damaged by ultraviolet light, and then the service life of the cell is affected. Aiming at the problem, the invention provides the film layer structure for improving UV attenuation of the TOPcon battery, the second silicon oxide layer and the first silicon oxide layer are respectively arranged above and below the aluminum oxide layer, and the silicon nitride layer is arranged on the surface of the second silicon oxide layer, so that the passivation effect of the front surface of the obtained TOPcon battery is remarkably improved, the attenuation speed of the battery is effectively reduced, and the service life of the battery is prolonged. And the service life of the battery is prolonged.
Owner:EGING PHOTOVOLTAIC TECHNOLOGY CO LTD

Whisker toughened zirconium oxide-aluminum oxide composite ceramic and additive manufacturing method thereof

The invention belongs to the technical field of ceramic materials, and particularly discloses whisker toughened zirconium oxide-aluminum oxide composite ceramic and an additive manufacturing method thereof, the composite ceramic comprises the following components by mass: 94 parts of zirconium oxide toughened aluminum oxide ceramic and 5 parts of silicon carbide whisker; the zirconium oxide toughened aluminum oxide ceramic is prepared from the following components in parts by mass: 76 parts of aluminum oxide and 24 parts of zirconium oxide, and 3mol% of yttrium oxide is added into the zirconium oxide. According to the whisker toughened zirconium oxide-aluminum oxide composite ceramic and the additive manufacturing method thereof, the preparation method has unique design of components and process, and the preparation of a high-density and high-performance ceramic-based composite material part based on a fused deposition modeling technology is successfully realized. Further, the prepared silicon carbide whisker toughened zirconium oxide-aluminum oxide-based composite ceramic has relatively high density and excellent obdurability.
Owner:HARBIN INST OF TECH

Multi-layer vibration compression molding machine

The invention provides a multi-layer vibration compression molding machine, and relates to the technical field of material molding equipment. The multi-layer vibration compression molding machine comprises a base; each mold vibration assembly comprises a vibration plate, a fixing plate, a pressing plate and a mold, the fixing plate is located above the vibration plate, the pressing plate is elastically connected to the side, facing the vibration plate, of the fixing plate, and the mold is clamped between the vibration plate and the pressing plate; the vibrating plate is elastically connected with the base or the lower-layer fixing plate; the fixing plate is fixedly connected with the base; the vibration motor is installed on the base and transmits vibration energy to the vibration plate on the bottom layer. According to the multi-layer vibration compression molding machine, the compactness of materials can be effectively improved, uniform distribution of material components is ensured, and internal defects are reduced. Therefore, the overall performance of the material is optimized, and the production efficiency is improved.
Owner:ZHONGTIAN TECH MARINE SYST CO LTD +1

A method for preparing a novel ultra-high voltage high-performance composite insulating material

PendingCN122080468ASolve the problem of high pressure resistanceSolve the problem of aging resistance imbalancePolymer scienceResin matrix
This invention discloses a method for preparing a novel ultra-high voltage high-performance composite insulating material, belonging to the field of composite insulating material preparation technology. The technical solution includes the following steps: S1, preparing a modified epoxy-silicone rubber composite resin matrix: 40-50 parts by weight of bisphenol A type epoxy resin (E-51) are placed in a reaction vessel, heated to 60-70℃, and continuously stirred at a stirring rate of 300-500 r / min. 10-15 parts by weight of terminal hydroxyl polysiloxane (molecular weight 5000-10000) are added, and the temperature is kept constant for 1.5-2 hours; subsequently, the system temperature is lowered to 40-50℃. The beneficial effects of this invention are: by setting up a resin matrix system of "terminated hydroxyl polysiloxane modified epoxy resin + nano-alumina / boron nitride composite reinforcement," the problem of imbalance between high voltage resistance and aging resistance in existing materials is solved. It exhibits significantly improved dielectric strength, greatly reduced dielectric loss, and excellent high and low temperature cycling performance, meeting the long-life operation requirements of ultra-high voltage equipment.
Owner:QUANZHOU DAXIYANG ELECTRIC POWER TECH CO LTD

NiMn-based polycrystalline alloy and preparation method and application thereof

The invention provides a NiMn-based polycrystalline alloy as well as a preparation method and application thereof. The preparation method of the NiMn-based polycrystalline alloy comprises the following steps: casting an alloy raw material to obtain an as-cast alloy, performing spray casting on the as-cast alloy to obtain a polycrystalline alloy cast ingot, and performing homogenizing annealing treatment on the polycrystalline alloy cast ingot to obtain the NiMn-based polycrystalline alloy. The preparation process provided by the invention is simple and controllable, the prepared NiMn-based polycrystalline alloy is few in internal defects and high in homogenization degree, rapid occurrence of martensite phase transformation can be realized, and the magnetocaloric performance of the NiMn-based polycrystalline alloy is improved through coupling of magnetic phase transformation and structural phase transformation.
Owner:GANJIANG INNOVATION ACAD CHINESE ACAD OF SCI

A dual-spot parallel scanning additive manufacturing system and method

This invention belongs to the field of laser additive manufacturing technology, specifically relating to a dual-spot parallel scanning additive manufacturing system and method. A laser generation unit dynamically distributes a laser beam to the first and second optical paths according to a preset energy ratio through polarization beam splitting. The spot generation unit uses two spatial light modulators to modulate the two beams into patterned spots and dot spots respectively. The filtering and imaging unit filters and images the two beams. The parallel scanning unit drives the dual spots to scan synchronously on a powder bed. The control unit performs model slicing and patterned region segmentation, and dynamically allocates energy and synchronously controls all units to work together based on the segmentation results. This achieves a single laser, dual optical paths, irregularly shaped spots, and parallel scanning, simultaneously balancing processing efficiency and forming accuracy, effectively solving the technical problem of traditional single-spot methods that struggle to achieve both efficiency and accuracy.
Owner:AIR FORCE UNIV PLA

Brake disc material prepared from carbon-ceramic composite material and processing technology of brake disc material

The invention relates to the technical field of brake disc materials, and discloses a brake disc material prepared from a carbon-ceramic composite material and a processing technology thereof.The processing technology comprises the following steps that phenolic resin, carbon powder, metal oxide, composite carbon fibers and a pore forming agent are evenly mixed and then placed in a mold, and a composite material prefabricated body is obtained through compression molding and cold water demolding; processing the composite material preform to form a carbon-ceramic brake disc rough blank, and then performing carbonization treatment to obtain a carbonized composite material; and mixing the carbonized composite material with silicon powder, carrying out siliconizing treatment, soaking in a protective solution, sintering, taking out, polishing and perforating to obtain the brake disc material prepared from the carbon-ceramic composite material. The composite carbon fiber contains a large number of silicon hydroxyl groups and can be tightly combined with phenolic resin, carbon powder, metal oxide and a pore-forming agent, and the polycarbosilane layer generates a nanoscale silicon carbide phase, so that the mechanical property and wear resistance of the brake disc material prepared from the carbon-ceramic composite material can be improved.
Owner:XIANGHE XUMINGYUAN AUTO PARTS CO LTD

Chloro-zirconium-cesium crystal powder for composite scintillator and confinement growth method of chlorine-zirconium-cesium crystal powder

PendingCN121852038AEffectively control particle sizeSimple control methodLuminescent compositionsOxide compositeSlurry
The invention relates to the technical field of preparation of lead-free metal halide scintillator crystal powder, and particularly discloses chlorine zirconium cesium crystal powder for a composite scintillator and a confinement growth method of the chlorine zirconium cesium crystal powder. The cesium zirconium chloride crystal powder is cesium zirconium chloride-gas phase oxide composite powder formed on the micro-nano scale by means of in-situ crystallization, and the cesium zirconium chloride crystal powder is composed of 50-95.3 wt% of cesium zirconium chloride and 4.7-50 wt% of gas phase oxide. The preparation method comprises the following steps: preparing zirconium chloride-gas phase oxide powder, preparing a cesium chloride solution, mixing zirconium chloride-gas phase oxide slurry, and growing chlorine zirconium cesium crystal powder in an in-situ crystallization confinement range. The cesium zirconium chloride crystal powder prepared by the method has the advantages of adjustable particle size, stable suspension and efficient scintillation luminescence performance, solves the problem of crystal powder-polymer phase separation in a composite scintillator, and can be used for large-scale preparation of the composite scintillator in the field of radiation detection.
Owner:RES INST OF CHEM DEFENSE PLA ACAD OF MILITARY SCI

Stepless heat preservation cap mouth structure

The utility model relates to steel ingot casting technical field especially no step heat preservation cap mouth structure, it includes mud cap mouth, iron cap mouth and heat preservation cover. Mud cap mouth is conical, and the inner chamber adopts octagonal plum blossom shape taper structure, and the taper range is 0.8% 1.5%, iron cap mouth includes circular ring and lug, and is installed in close cooperation with mud cap mouth, heat preservation cover is composed of stone wool heat preservation board and metal sheet, and covers in the periphery to reduce the cooling rate. The utility model discloses through optimizing the inner chamber shape and cancelling step structure, reduces stress concentration and slag inclusion defect, significantly improves the billet yield, is applicable to electric furnace ingot and other metal ingot casting process.
Owner:TIANGONG AIHE SPECIAL STEEL

A packaging composition that combines high hydrophobicity and easy permeability, its preparation method and application.

This application relates to the field of sensor encapsulation, specifically disclosing an encapsulation composition with both high hydrophobicity and easy permeability, its preparation method, and its application. The raw materials used include epoxy resin, a curing agent, and a hydrophobic additive in a weight ratio of 1:1:(3-4). The epoxy resin includes bisphenol A type epoxy resin or bisphenol F type epoxy resin. The hydrophobic additive is prepared from quartz sand and a surface-modified paraffin oil emulsion in a weight ratio of 100:(0.99-4.75), with the quartz sand having a mesh size of 10-1500 mesh. The preparation method involves continuously dispersing the quartz sand while simultaneously spray-mixing the surface-modified paraffin oil emulsion with the quartz sand until the surface-modified paraffin oil emulsion is completely consumed, followed by drying to obtain the hydrophobic additive. The composition of this application can be used for encapsulating sensors, exhibiting both good hydrophobicity and permeability, ensuring good insulation reliability and initial discharge voltage for the sensor.
Owner:SHANGHAI WENYOU IND CO LTD

Sliding block glue feeding structure of plastic mould

The utility model discloses a slide block glue feeding structure of a plastic mould, which comprises a diving gate assembly and a slide block of the mould, the diving gate assembly comprises a diving port and a runner, the runner is arranged in an upper mould of the mould, the diving port is arranged in the slide block, and when the mould is closed and the slide block enters a core, the runner is arranged in the slide block. The diving opening is communicated with a cavity of the injection mold, a connecting section is arranged between the diving opening and the runner, the end, away from the cavity, of the diving opening is communicated with the end, located in the mold, of the runner through the connecting section, and the connecting section is vertically arranged; the diving opening is obliquely arranged relative to the horizontal plane, and the included angle between the diving opening and the connecting section is an obtuse angle. According to the utility model, the arrangement of cold runners is reduced, the length of the whole runner is shortened, and the forming period is shortened, so that the efficiency is improved.
Owner:XINHE (DONGGUAN) HARDWARE TECH CO LTD

A high density additive manufacturing green body and a method for increasing the density thereof

PendingCN122683133AReduce internal defectsEliminate obturator holes
The application discloses a high-density additive manufacturing blank and a density improvement method thereof, and relates to the technical field of additive manufacturing, which comprises the following steps: accurately positioning the spatial position of a through-hole on the surface of the blank by using nondestructive testing technology such as industrial CT, then adopting the same additive manufacturing material to perform vacuum repair welding and plugging, constructing a densification pretreatment layer, and finally performing hot isostatic pressing treatment to realize the complete closure of all types of pores (including through-holes and closed pores) in the blank. The application greatly improves the final density of the additive manufacturing blank by using the above method, and a high-performance dense component is obtained.
Owner:BEIHANG UNIV

Antibacterial food packaging bag for taro silk cake and preparation method thereof

The application relates to the technical field of food packaging materials, and discloses an antibacterial taro silk cake food packaging bag and a preparation method thereof. The antibacterial taro silk cake food packaging bag comprises an inner laminating layer and an outer functional layer. The preparation method of the antibacterial taro silk cake food packaging bag is as follows: prepared inner laminating layer material and outer functional layer material are respectively added into two hoppers of a two-layer co-extrusion blow molding machine, the extrusion temperature of the inner laminating layer is set to 160-180 DEG C, the extrusion temperature of the outer functional layer is set to 180-200 DEG C, the composite film is obtained by blow molding after head compounding, the composite film is cut into the required size, and then heat sealing is carried out under the conditions that the heat sealing temperature is 140-150 DEG C and the heat sealing time is 2-3 seconds to obtain the antibacterial taro silk cake food packaging bag. The antibacterial taro silk cake food packaging bag has good mechanical, barrier and antibacterial properties.
Owner:YONGZHOU DAIYAO FOOD TECH CO LTD

A method of preparing a composite material in-plane test specimen and products thereof

This invention discloses a method for preparing in-plane test specimens of composite materials and its product. The method includes providing a composite prepreg and laying it at a preset lamination angle to form multiple laminated modules; vacuuming each laminated module and then ironing its surface with an electric iron; stacking at least two ironed laminated modules and vacuuming them again to obtain a laminated structure; hot-pressing and curing the laminated structure to form a composite material layer, forming an integral plate; fixing the integral plate to a first PVC pad with a first pressure-sensitive double-sided adhesive to form a cut sample; fixing a second PVC pad to a cutting equipment worktable with a second pressure-sensitive double-sided adhesive; and using a grinding wheel disc cutter to cut and grind the fixed cut sample in an integrated manner to obtain a test specimen, effectively overcoming the drawbacks of traditional integral vacuuming.
Owner:JIANGXI LIANCHUANG ELECTROACOOUSTIC CO LTD

Ultrafast laser in-situ assisted sintering (sls) based sintering method and system for selective laser melting (slm) and applications

PendingCN122252638AImprove coagulation behaviorImprove isotropic performanceAdditive manufacturing apparatusSelective laser meltingMetallurgy
The application relates to the technical field of metal additive manufacturing, in particular to an SLM additive manufacturing method and system based on ultrafast laser in-situ assistance and application, which comprises the following steps: a three-dimensional model of a part to be formed is established and slice processing is carried out to generate a scanning path of a main laser; an ultrafast laser is coaxially combined with the main laser, and working parameters of the main laser and the ultrafast laser are set; a layer of metal powder is laid in a forming area, the main laser scans and melts the metal powder according to the scanning path to form a molten pool, and the ultrafast laser acts on the tail of the molten pool or the solidification front of the point after the main laser scans the point at a preset time interval; layer-by-layer processing is carried out until the whole part is manufactured. The ultrafast laser is coaxially integrated with the main laser, and in a preset time interval after the main laser scans a point to melt the metal powder and form a molten pool, the ultrafast laser is used to impact and inject energy into the tail of the molten pool or the solidification front which is advancing, so that grain refinement, defect elimination and stress regulation can be realized, and high-performance metal parts with small and uniform microstructure, few internal defects, low residual stress, excellent mechanical properties and significantly improved isotropy can be prepared.
Owner:WUHAN HGLASER ENG CO LTD

A preparation process for a high-density tungsten-cobalt cemented carbide

This invention discloses a preparation process for a high-density tungsten-cobalt cemented carbide, relating to the field of cemented carbide preparation technology. The process includes the following steps: S1: Batching: Tungsten carbide powder, cobalt powder, and a forming agent are precisely weighed according to a preset mass percentage and placed in a high-efficiency mixing device for pre-mixing to ensure that the components are initially and uniformly dispersed, resulting in a stable tungsten-cobalt mixture. This invention employs a multi-stage densification process involving wet ball milling, spray drying, die pressing, and cold isostatic pressing. This not only ensures that the mixture particles are sufficiently refined and uniformly dispersed, producing spherical composite powder with excellent flowability and significantly reducing internal defects in the formed blank, but also further enhances the density and uniformity of the blank through cold isostatic pressing, providing a good foundation for subsequent full densification during sintering, effectively reducing the porosity of the finished alloy and improving the overall structural stability.
Owner:RUILIN MATERIAL TECHNOLOGY (SUZHOU) CO LTD

A copper-phosphorus alloy target and its preparation method

This invention provides a copper-phosphorus alloy target and its preparation method. The preparation method includes the following steps: sequentially subjecting a copper-phosphorus alloy billet to hot forging, forging and stretching, a first water cooling treatment, a first heat treatment, rolling, a second heat treatment, and a second water cooling treatment to obtain the copper-phosphorus alloy target; the phosphorus content in the copper-phosphorus alloy billet is 400-500 ppm. The preparation method provided by this invention can reduce internal defects in the copper-phosphorus alloy target, avoid abnormal grain structure, refine internal grains, improve grain uniformity, and thus improve the quality and performance of the copper-phosphorus alloy target.
Owner:KONFOONG MATERIALS INTERNATIONAL CO LTD

Method for preparing high-hardness high-wear-resistance magnesium-based composite material

ActiveCN120619320BSolve the problem of extrusion difficultieshigh hardnessMagnesium matrix compositeHardness
The application discloses a preparation method of high-hardness and high-wear-resistance magnesium-based composite material, which comprises the following steps: preparing materials, remelting, casting, and extruding; AZ91 alloy semi-solid-state temperature is added with B4C for stirring and cooling to form a casting rod for standby; an AZ91 alloy solution is prepared; a mold with a proper diameter is selected, the standby casting rod is placed at a center position of the mold, the AZ91 alloy solution is poured into the mold, meanwhile, the mold is placed on a vibration platform to continuously vibrate until the solution completely solidifies, so that the magnesium-based composite material is formed; and the magnesium-based composite material after complete solidification is subjected to heat treatment and cooling, and then is heated again to be extruded and deformed. The application effectively solves the extrusion difficulty of the existing composite material, greatly improves the hardness of the alloy layer, significantly reduces internal defects, improves the material density, uniformly disperses B4C particles in the matrix, avoids local agglomeration, improves the hardness and wear resistance of the composite material, and effectively reduces the cracking risk in the extrusion process.
Owner:山西银光华盛镁业股份有限公司 +1

Two-dimensional metal material for ultraviolet photoelectric detector and preparation method of two-dimensional metal material

PendingCN121968786AEnsure specific absorption capacityreduce lossFinal product manufactureOxygen vacancyLattice mismatch
The invention relates to a two-dimensional metal material for an ultraviolet photoelectric detector and a preparation method of the two-dimensional metal material, and belongs to the technical field of detector preparation, a sapphire substrate is activated through high-activity particles through plasma treatment, hydroxyl active sites are introduced, a clean interface foundation is laid for heteroepitaxial growth of an ultra-wide forbidden band Ga2O3 film, and the performance of the detector is improved. The method comprises the following steps: performing chemical vapor deposition on Ga2O3 to ensure the specific absorption capacity of Ga2O3 to ultraviolet light, annealing in a mixed atmosphere after chemical vapor deposition, repairing the oxygen vacancy defect of a Ga2O3 film by using the high activity of ozone, improving the crystallization quality, effectively reducing dark current noise, and performing in-situ growth of a WSe2 layer in a high vacuum environment through a pulse laser deposition technology to form a van der Waals heterojunction without lattice mismatch. And an efficient carrier separation channel can be constructed by virtue of energy level matching of WSe2 and Ga2O3, so that the problem that ultraviolet absorption and carrier transmission are difficult to consider by virtue of a single material is solved, and the light response capability of the device is remarkably enhanced.
Owner:SICHUAN DONGZE TECH CO LTD

An ultrasonic roll assisted additive manufacturing method and apparatus

The application discloses an ultrasonic rolling assisted laser additive manufacturing method and device, and belongs to the technical field of additive manufacturing. The ultrasonic rolling system is fixed on the laser deposition device through a support, and a forming base plate is fixed in a cooling water tank, so that synchronous ultrasonic rolling and temperature regulation and control are realized on a deposited layer in an additive process. By applying ultrasonic vibration in a molten pool solidification stage, grains are refined, and internal defects are reduced. The rolling module adopts a roller type structure design, ensures effective ultrasonic transmission, utilizes the integrated ultrasonic vibration roller to apply high-frequency vibration pressure behind the molten pool, generates plastic deformation on the material in a high-temperature plastic state, reduces residual stress, improves surface roughness, densifies and optimizes the microstructure. Through water cooling temperature control, the influence of thermal accumulation of the deposited layer on the ultrasonic rolling layer is reduced, the interlayer organization consistency is improved, and the overall organization uniformity regulation and performance improvement of the laser additive manufacturing component are realized.
Owner:DALIAN UNIV OF TECH

Forming and manufacturing method of aircraft engine stator blade

ActiveCN119525407Aprecise control over deformationcontrol deformationFurnace typesEngine componentsAviationMold filling
The invention relates to the technical field of aviation aircraft engine part manufacturing, in particular to an aircraft engine stator blade forming manufacturing method which comprises the following steps of S1, pretreatment, S2, upsetting treatment, S3, primary defect treatment, S4, die forging treatment, S5, secondary defect treatment and S6, solid solution aging treatment. After the upsetting and die forging forming method is adopted, the mold filling property of the blade becomes good, the structure is uniform, and the production efficiency is high.
Owner:SHAANXI HEYE SPECIAL STEEL TOOL

A method for 3D printing aluminum alloy bearing cages

This application discloses a method for 3D printing aluminum alloy bearing cages, belonging to the field of cage production technology. The method includes the following steps: (1) preparing a matrix powder; (2) pretreating untreated SiC nanoparticles with nickel-phosphorus plating to obtain SiC nanoparticles coated with an average layer thickness of 60-100 nm nickel-phosphorus layer, mixing them evenly with the obtained matrix powder to obtain a powder, and then using laser powder bed 3D printing to perform layer-by-layer printing to obtain a preliminary blank; (3) heat-treating the preliminary blank to obtain the aluminum alloy cage. The aluminum alloy bearing cage prepared by adding SiC nanoparticles and using laser powder bed 3D printing has high hardness and good wear resistance, which not only extends the service life of the cage but also enables rapid short-term production of the cage.
Owner:SHANDONG GOLDEN EMPIRE PRECISION MACHINERY TECH CO LTD

Portland cement clinker based on marlstone and preparation method thereof

The invention discloses portland cement clinker based on marlstone and a preparation method thereof, and relates to the technical field of cement. The method comprises the following steps: crushing, grinding and drying natural marlstone, spraying and activating by using a mixed steeping liquor containing sodium hydroxide, lanthanum nitrate and cerous nitrate, and drying and roasting at low temperature to obtain modified marlstone powder; mixing the powder with calcium carbonate, quartz powder, ferric oxide, dihydrate gypsum, calcium fluoride and barium carbonate, and pressing into a green body; and finally, sequentially carrying out two-stage mineralization calcination on the green body, introducing oxygen-enriched air in a heat preservation stage, continuously calcining, and cooling to obtain the cement clinker. According to the invention, marlstone is used as a main raw material, and the obtained cement clinker has excellent sulfate corrosion resistance through dipping activation and multi-stage calcination processes.
Owner:HUBEI BAIZHAOSHAN CEMENT CO LTD

End-side-cloud system for monitoring and controlling concrete vibration quality of nuclear power engineering

The invention relates to the technical field of concrete vibration, in particular to an end-side-cloud system for monitoring and controlling the concrete vibration quality of nuclear power engineering, which comprises a vibration terminal device for performing multi-modal data acquisition and end-side early warning in the vibration process and executing concrete vibration operation; the edge computing terminal is used for performing real-time processing, vibration energy distribution analysis and concrete compactness intelligent evaluation on the multi-modal data uploaded by the vibration terminal device, and generating a control suggestion for the vibration process; the cloud platform is used for carrying out centralized storage and modeling analysis on data from the edge computing terminal and the vibrating terminal device; and the communication module is used for realizing two-way communication of data and control instructions among the vibrating terminal device, the edge computing terminal and the cloud platform. According to the invention, the detection and control of the vibrating process are realized, and the vibrating quality is improved.
Owner:CHINA NUCLEAR IND 22ND CONSTR +3

A seamless steel tube skew rolling apparatus and process

The application relates to the technical field of seamless steel pipe manufacturing, and discloses a seamless steel pipe skew rolling equipment and a process, wherein the seamless steel pipe skew rolling equipment comprises a base and a PLC controller; a skew rolling mechanism, the skew rolling mechanism comprises a driving disc and an annular frame which are respectively fixed on the upper surface of the base, the inner wall of the annular frame is provided with six support frames in a circumferential array, the inner wall of each of the six support frames is rotationally provided with a roller, and the skew rolling mechanism further comprises a driving motor which is arranged on the side of the driving disc and used for driving the six rollers to rotate simultaneously. Through the arrangement of the skew rolling mechanism, the steel billet for manufacturing seamless steel pipes can be processed in a way that the six rollers are used for oblique rolling, the production efficiency of the seamless steel pipes is effectively improved, the energy consumption is reduced, the occurrence of internal defects is reduced, the quality and stability of the products are improved, the production equipment is simplified, and the maintenance cost is reduced.
Owner:LINZHOU FENGBAO PIPE

A method for producing a steel-aluminum alloy having a preform skeleton

ActiveCN118186279Bgrain refinementsmall grain
The application provides a preparation method of a steel-aluminum alloy with a prefabricated framework, and belongs to the technical field of non-ferrous metal preparation. According to the characteristics of stainless steel and aluminum alloy materials, a stainless steel framework structure with added boron (B) elements is prepared by using a selective laser additive manufacturing technology. The stainless steel framework adopts a designed 'arch bridge' structure, has excellent compressive strength, and the 'arch bridge' structure design is flexible. The weight is reduced without reducing the strength, and the addition of boron elements can improve the strength of the stainless steel framework. An aluminum alloy melt is filled into the stainless steel 'arch bridge' shaped framework by a casting method. In the casting process, an ultrasonic wave is applied to reduce defects in the casting process, refine aluminum alloy grains, improve the heterogeneous interface bonding strength of steel and aluminum, reduce internal residual stress, and prepare a composite material of an aluminum alloy filled stainless steel framework with excellent performance and an 'arch bridge' microstructure.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY

Forming device for low-softening-temperature glass

The invention discloses a forming device for low-softening-temperature glass, and belongs to the technical field of glass forming, the forming device comprises a base mounted on a workbench, the base is rotatably connected with a disc, the disc is provided with a graphite mold, the outer wall of the base is provided with a protective wall, the protective wall is provided with a control background and a supporting frame, and the supporting frame is arranged on the base. A metering assembly is arranged on the supporting frame, a discharging component is arranged at the bottom of the metering assembly, a driving structure is arranged at the top of the metering assembly, the metering assembly comprises a driving rod and a limiting cylinder, one end of the driving rod is connected with a metering cylinder, and a material guide table is arranged at a discharging port in the bottom of the metering cylinder. A sliding plate is arranged on the driving rod, a spring is connected between the sliding plate and a fixing plate at the top of the metering cylinder, and a feeding port is formed in the top of the feeding cylinder. The invention discloses the forming device which improves the precision and quality stability of glass forming so as to meet the diversified requirements of the modern industry for glass products.
Owner:XIAMEN GONGTAO NEW MATERIAL TECH CO LTD

Tunnel lining demolding device

The invention belongs to the technical field of demolding devices, and particularly relates to a tunnel lining demolding device which comprises two side plates symmetrically arranged and further comprises a demolding assembly, the demolding assembly comprises two electric telescopic rods and two inner molds, outer molds are arranged on the outer walls of the two inner molds, and the outer molds are arranged on the outer walls of the two inner molds. The demolding assembly pushes the outer mold to move through extension of the electric telescopic rod, so that the outer mold is separated from the inner mold, the formed lining is separated from the position between the outer mold and the inner mold, and then demolding work is completed. According to the tunnel lining demolding device, through the arranged demolding assembly, when demolding work is carried out, a rotating motor rotates a mold to the lower portion, an outer mold and an inner mold are separated under the action of an electric telescopic rod, a formed lining can be separated from the interior of the inner mold under the action of the gravity of the lining, and therefore the automatic demolding effect is achieved; manual operation is not needed, and the tunnel lining machining efficiency is effectively improved.
Owner:CHINA RAILWAY 16TH BUREAU GRP 5TH ENG +1

Friction stir additive manufacturing device and method for high-entropy alloy particle reinforced aluminum matrix composite

The invention belongs to the technical field of friction stir solid-phase deposition additive manufacturing, and particularly relates to a friction stir additive manufacturing device and method for a high-entropy alloy particle reinforced aluminum matrix composite. Comprising an extrusion deposition system and a continuous feeding system, and the extrusion deposition system comprises an extrusion screw and a rotating shaft shoulder; the continuous feeding system comprises a raw material box, an induction heater and a feeding roller; and a feeding pipe of the continuous feeding system is communicated with an extrusion screw rod of the extrusion deposition system. The device can achieve continuous feeding of raw materials with different particle sizes and efficient and rapid solid-phase additive manufacturing, does not need a protective atmosphere in the additive manufacturing process, can operate in the atmospheric environment, and has the advantages of being high in raw material adaptability, high in additive manufacturing efficiency, low in manufacturing and maintenance cost and the like. According to the method, through heating plasticization and continuous extrusion, a thermoplasticized mixed raw material is deposited on the surface of a substrate to form a deposition layer, meanwhile, stirring friction is conducted on the deposition layer, and rapid preparation of the high-entropy alloy particle reinforced aluminum-based composite material additive body is achieved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

An apparatus for producing an alloy profile

The application provides an alloy profile preparation device. The alloy profile preparation device comprises a heating box and a forming assembly. The heating box comprises a box body, an ultrasonic homogenization probe and a melting furnace. The melting furnace comprises a furnace body and a furnace cover. The melting furnace is arranged in the box body. The ultrasonic homogenization probe is installed on the top of the box body and extends into the furnace body through the furnace cover. The ultrasonic homogenization probe is used for forming an acoustic pressure wave by generating high-frequency vibration. The acoustic pressure wave propagates in the alloy solution melted in the melting furnace to realize homogenization of the alloy solution. The forming assembly comprises a water cooling assembly, a guide rod and a casting and rolling machine. The melting furnace is communicated with the guide rod through an electromagnetic valve. The guide rod is used for guiding the alloy liquid flowed out of the melting furnace to the casting and rolling machine for rolling to form an alloy profile. The water cooling assembly is arranged at the guide rod to cool the alloy solution flowed out of the melting furnace. The alloy profile preparation device can realize preparation of high-quality alloy profiles.
Owner:NINGBO S J ELECTRONICS CO LTD