229results about How to "Reduce internal stress" patented technology

The invention relates to the technical field of concrete preparation, in particular to moisturizing anti-cracking high-ductility concrete and a preparation method thereof. The moisturizing anti-cracking high-ductility concrete is prepared from the following components: 350 to 450 parts of ordinary Portland cement, 200 to 300 parts of fly ash, 30 to 50 parts of silica fume, 250 to 350 parts of quartz sand, 0.5 to 1 part of a water reducing agent, 10 to 20 parts of an expanding agent, 0.1 to 0.3 part of a retarder, 0.5 to 1 part of a thixotropic lubricant, 0.2 to 0.7 part of a modified nano material, 0.7 to 3 parts of a modified composite curing agent, 5 to 10 parts of an anti-cracking agent, 5 to 12 parts of polymer fiber and 180 to 220 parts of water. The high-moisture-retention high-water-retention concrete has the characteristics of high moisture retention and high water retention, is beneficial to maintaining the internal humidity balance, reducing cracks generated by drying shrinkage, improving the durability of the concrete, and remarkably reducing the cracking risk of the concrete in the hardening process, so that the concrete structure is more complete, the safety of the structure is improved, and the service life of the structure is prolonged.

The invention relates to the technical field of stainless steel bar heat treatment, in particular to an efficient and energy-saving stainless steel bar heat treatment device, and effectively solves the problems that rapid heat treatment cannot be performed on a single bar, and the bar is inconvenient to clamp and position. Comprising a heating bin, a solid solution heating assembly is arranged in the heating bin, through holes are formed in the left side and the right side of a heat insulation plate respectively, the left end of the heating bin is fixedly connected with the heat insulation plate, the left side of the heat insulation plate is slidably connected with multiple positioning rods evenly distributed in the circumferential direction of the through holes, and rotating balls are hinged to one ends of the positioning rods; by arranging the heating bin and the solid solution heating assembly, the stainless steel bar entering the heating bin can be subjected to solid solution heating, the internal stress of the stainless steel bar is reduced, and secondary drawing is facilitated; the positioning rod, the rotating ball, the clamping assembly, the support, the conveying roller, the moving assembly and the driving assembly are arranged, the clamping assembly can be used for driving the positioning rod to be close to or away from the center of the through hole, and then a bar is clamped while center positioning is conducted.

The invention provides a silicon-based negative pole piece and a lithium ion battery comprising the same, and relates to the technical field of lithium ion batteries. Comprising a negative electrode current collector, a second active material layer arranged on at least one surface of the negative electrode current collector, and a first active material layer arranged on the surface of the second active material layer. The design of the two active material layers ensures high energy density, and meanwhile, the formula design is optimized by combining the bonding characteristic of the interface layer, so that large internal stress is prevented from being generated in the charging and discharging process; the organic porous cross-linked polymer is applied to the negative pole piece, and the polymer is loose and porous and can be subjected to cross-linked polymerization in a high-temperature process, so that negative pole particles are tighter, expansion of a silicon negative pole in a charging and discharging process can be buffered, and stripping and cracking of the pole piece are prevented.

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a microwave dielectric ceramic material and a preparation method thereof.The microwave dielectric ceramic material is prepared from, by mass, 75-95 parts of a first main material, 0-18.4 parts of a second main material, 0.03-3.9 parts of B2O3 and 0-13.5 parts of other components, and the first main material is SiO2. When the mass ratio of the B2O3 to the SiO2 is within a specific range, the crystal phase of the SiO2 can be stably converted into a quartz crystal phase, so that the cracking possibility of the microwave dielectric ceramic material is effectively reduced.

The invention relates to the technical field of polyurethane coatings, and discloses a preparation method of an antibacterial wear-resistant waterborne polyurethane coating, which comprises the following steps: taking concentrated hydrochloric acid, p-phenylenediamine, sodium nitrite, paraformaldehyde, amino-modified nano silicon dioxide and hexamethylene diisocyanate as raw materials; the preparation method comprises the following steps: taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as a raw material, carrying out diazotization coupling reaction, substitution reaction, Mannich reaction and addition reaction to prepare modified polyisocyanate, then taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ((2-aminoethyl) azadiyl) dimethanol as raw materials, carrying out substitution reaction to prepare DOPO-based dihydric alcohol, and carrying out reaction to prepare the DOPO-based dihydric alcohol. Finally, the modified polyisocyanate, DOPO-based dihydric alcohol and polyethylene glycol 400 are used as raw materials, an antibacterial wear-resistant polyurethane emulsion is prepared through a prepolymerization reaction and a chain extension reaction, and the prepared polyurethane coating has good antibacterial, anti-ultraviolet, flame-retardant and wear-resistant properties.

The invention provides a silicon-based negative electrode material, a preparation method of the silicon-based negative electrode material, a dry-method electrode, a battery and electric equipment, and belongs to the technical field of battery manufacturing. The silicon-based negative electrode material is of a core-shell structure, an inner core is a silicon-based material, a shell is a cross-linked polymer layer, the cross-linked polymer layer can conduct ions but cannot conduct electrons, the silicon-based negative electrode material can effectively inhibit PTFE from generating side reaction with lithium ions on the surface of a negative electrode, and meanwhile, the service life of the silicon-based negative electrode material is prolonged. And the problems of electrode pulverization, falling and the like caused by volume expansion of the silicon-based material in the charge-discharge process can be effectively solved, so that the corresponding battery has relatively excellent first discharge gram capacity, first efficiency and cycle performance.

The invention relates to the technical field of epoxy resin, in particular to an epoxy resin composition for high-strength carbon fiber winding and a preparation method thereof.The preparation method of the epoxy resin composition comprises the steps that S1, modified epoxy resin, a compatilizer, a retarder, a defoaming agent and nano filler are added into a reaction kettle and mixed and stirred, and a mixture A is obtained; s2, a composite curing agent is added into the mixture A, stirring and mixing are conducted, and the epoxy resin composition is obtained and has the advantages of being appropriate in viscosity, good in heat resistance, excellent in impact resistance, large in bending strength, small in volume shrinkage rate in the curing process, moderate in gelation time and capable of being wound with carbon fibers conveniently to prepare the composite material.

The invention relates to a GH5605 cobalt-based high-temperature alloy and a manufacturing method thereof, and belongs to the technical field of metal smelting. The GH5605 alloy comprises the following chemical components: 0.05%-0.15% of C, less than or equal to 1.0% of Si, 1.0%-2.0% of Mn, less than or equal to 0.03% of S, less than or equal to 0.03% of P, 19.0%-21.0% of Cr, 9.0%-11.0% of Ni, 14.0%-16.0% of W, less than or equal to 3.0% of Fe and the balance of Co and other inevitable impurities. According to the manufacturing method, the GH5605 electrode bar is smelted through a vacuum induction furnace, refining and argon protection processes are adopted, and it is ensured that the Mn element content of the electrode bar is qualified. And in the vacuum consumable remelting process, argon with the pressure of 2000-3000 Pa is filled, so that the vacuum degree is reduced, Mn element volatilization is effectively inhibited, and section component uniformity is achieved. Detection shows that the Mn content at the edge, the 1 / 2 radius and the central part of the steel ingot meets the technical standard. The process is simple and efficient, the quality of molten steel is not affected, the performance consistency and production stability of the GH5605 steel ingot are remarkably improved, and the process is suitable for the high-end application field.

The utility model discloses a ditching and fertilizing integrated device, which relates to the technical field of planting equipment and comprises a ditching mechanism and a fertilizing mechanism. The ditching mechanism comprises a handle and a ditching plough; the furrow plough is fixedly arranged at one end of the handle; the fertilizer spraying mechanism comprises a fertilizer box, a fertilizer outflow pipe, a push switch and a plugging sheet; the fertilizer box is fixedly arranged on the handle and is provided with a containing cavity, a feeding hole and a discharging hole; the fertilizer outflow pipe is communicated with the discharge hole; the other end of the fertilizer outflow pipe is positioned on the rear side of the furrow plough; a sliding groove is formed in the fertilizer outflow pipe, and the push switch is arranged in the sliding groove in a sliding mode; the blocking piece is rotationally arranged in the fertilizer outflow pipe, and the rotating axis of the blocking piece passes through the center of the blocking piece; the plugging sheet is connected with the push switch through a connecting piece; when the push switch moves in the direction away from the plugging piece, the push switch can pull the plugging piece through the connecting piece and enable the plugging piece to rotate. The working efficiency can be improved, and the labor input is reduced.

The invention discloses an in-situ control device and method for inhibiting metal additive manufacturing cracking, and belongs to the technical field of metal additive manufacturing. According to the device, the two propelling structures are arranged on the two sides of the core base plate with the transverse gap, the two propelling structures make contact with the core base plate from the two sides of the core base plate correspondingly, so that in the additive manufacturing process, the two propelling structures assist in extruding shrinkage of the core base plate from the two sides of the core base plate; and it is ensured that the shrinkage speed of the core substrate can be matched with the shrinkage speed required by the formed part. The device disclosed by the invention is a device for regulating and controlling the local structure deformation of the substrate in situ, and the local deformation of the substrate is regulated and controlled in real time in the additive manufacturing process, so that the distribution and evolution of a stress field are regulated, the tensile stress is successfully converted into the pressure stress, and the generation and expansion of cracks are effectively inhibited.

The invention discloses a perovskite solar cell with a passivated bottom. The perovskite solar cell sequentially comprises a transparent conductive substrate, a hole transport layer, a nanocrystalline mixed passivation layer, a perovskite light absorption layer, an electron transport layer and a back electrode from a light receiving front surface to a light receiving back surface, the nanocrystalline mixed passivation layer is made of insulating oxide and organic passivation molecules. According to the bottom nanocrystal passivation method, the nanometer oxide particles and the organic passivation molecules are combined and mixed to form the bottom nanocrystal, the passivation adsorption effect of the bottom can be enhanced, the passivation area is increased, more binding sites are provided, the internal stress of the bottom is effectively relieved, the mechanical adhesive force is enhanced, the stripping phenomenon is avoided, and the photoelectric conversion efficiency is improved.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a silicon-carbon negative electrode material, a preparation method thereof, a negative electrode plate and a lithium ion battery. The silicon-carbon negative electrode material comprises a composite fiber, wherein the composite fiber comprises a core layer and a carbon coating layer; the core layer has a pore structure and comprises a carbon skeleton and a silicon material; in the cross section of the composite fiber, the area of the pore structure is S pore, the area of the silicon element is S silicon, the area of the carbon element is S carbon, and 0.5 < = S pore / (S silicon + S carbon) < = 2. The silicon material in the core layer can provide higher gram volume, and the carbon skeleton can provide mechanical strength and enhance the conductivity of the material; the core layer has a pore structure and can provide a buffer space when the silicon material is charged, so that the cycle performance is improved; the carbon coating layer can effectively reduce the specific surface area of the material, avoids direct contact between the silicon material and an electrolyte, and improves the initial coulombic efficiency; the silicon material can be ensured to have enough buffer space by meeting the relational expression, and the cycle performance can be further improved.

The invention relates to the technical field of electrode materials, in particular to a composite silicon negative electrode material suitable for a sulfide-based all-solid-state battery and a preparation method and application thereof, and the preparation method comprises the following steps: (1) generating a metal organic framework material on the surface of a nano silicon material through an in-situ growth method; (2) carbonizing the metal organic framework material on the surface of the nano silicon material through calcination treatment to form a nitrogen-doped porous carbon material, so as to obtain a Si-NC material; and (3) generating a sulfide solid electrolyte on the surface of the Si-NC material through an in-situ growth method to obtain the Si-NC-SE composite silicon negative electrode material. According to the invention, the surface of the Si material is coated with the nitrogen-doped porous carbon material (NC) through an in-situ generation technology, and the sulfide solid electrolyte is generated in situ, so that the conductivity of the composite silicon negative electrode material and the cycling stability of the sulfide-based all-solid-state battery adopting the composite silicon negative electrode material are improved.

The utility model provides an MEMS piezoelectric sounder and a loudspeaker, first piezoelectric composite layers are symmetrically arranged at specified edge positions, a plurality of slotted structures are arranged in a specified area, a first diaphragm edge of a formed diaphragm structure is an anchoring edge, and an edge slotted structure is arranged at a non-anchoring edge. The internal stress of each diaphragm layer in the diaphragm structure caused by the process can be reduced by arranging the slotting structure, the flexibility of the diaphragm structure can be improved by covering the slotting structure with the flexible material, meanwhile, the sound leakage of the MEMS piezoelectric sounder at low frequency is reduced, the vibration amplitude and the emission sound pressure level of the MEMS piezoelectric sounder are improved, and the sound quality of the MEMS piezoelectric sounder is improved. According to the MEMS piezoelectric sounder, the flexible material with low density is adopted to replace a silicon vibrating diaphragm with large density, the mass of the vibrating diaphragm structure is reduced, the vibrating diaphragm structure of the rectangular bridge type structure can push out more air, the flexible material increases system damping, a sound pressure level SPL frequency response curve and a THD frequency response curve can be improved, and therefore the tone quality of the MEMS piezoelectric sounder is improved.

The invention discloses an automobile plate stamping process. The automobile plate stamping process comprises the following steps that S1, materials are prepared and blanked; s2, mold design; s3, the blank is pretreated through a continuous annealing process; s4, the mold is preheated; and S5, multi-stage progressive forming is carried out. The blank is subjected to continuous annealing process pretreatment, the plasticity of the material can be improved, internal stress is reduced, the uniformity and forming performance of the material are improved, and therefore the cracking risk in the stamping process is reduced; a multi-stage progressive forming method is adopted to replace a traditional one-time stretching forming method, local deformation and stress concentration of materials can be reduced, and therefore the risk of cracking is reduced, the quality of final parts is improved, and the material utilization rate is increased; the mold used in each step is relatively simple, the overall mold design and manufacturing cost is low, and maintenance is easier.

The invention provides a brake disc which comprises a friction ring, a first connecting piece and a second connecting piece. A second connecting piece is annularly arranged on the outer ring of the disc cap, the first connecting piece and the second connecting piece are fixedly connected in the axial direction of the brake disc, the second connecting piece is provided with a plurality of interval parts and a plurality of abutting parts, the interval parts and the abutting parts are annularly arranged at intervals in the circumferential direction of the disc cap, and the abutting parts abut against the first connecting piece; the interval part is located on the side, facing the first connecting piece, of the second connecting piece, the first connecting piece and the second connecting piece form an interval in the axial direction of the brake disc through the interval part, and the second connecting piece can deform through the interval part. By means of the technical scheme, the problem that in the prior art, a split type brake disc is poor in thermal deformation performance can be solved.

The utility model discloses an oil tank device for quenching treatment, which comprises a box body, a supporting rod fixedly connected to the upper surface of the box body, a bearing plate fixedly connected to the upper end of the supporting rod, a lifting device fixedly connected to the lower surface of the bearing plate, a connecting rod fixedly connected to the lower end of the lifting device, and a storage plate fixedly connected to the lower end of the connecting rod. A stirring device is rotatably connected to the inner surface of the box body, a filtering device is fixedly connected to the lower surface of the box body, a backflow pipe is fixedly connected to the lower surface of the filtering device, the other end of the backflow pipe is fixedly connected to the side surface of the box body, and an oil discharging pipe is fixedly connected to the side surface of the box body. Metal particles such as iron chips and steel chips may damage or pollute the surface of a workpiece, and the quenching treatment quality can be improved by removing the metal particles.

The utility model provides a piezoelectric MEMS sounding unit and a loudspeaker, each peripheral area of the upper surface of a substrate is provided with a first piezoelectric composite unit, the middle rectangular area of the substrate is provided with a slotted gap, the edge of each diaphragm of a formed diaphragm structure is anchored, a gap structure is arranged between every two adjacent first piezoelectric composite units, and the first piezoelectric composite units and the second piezoelectric composite units are arranged in the slotted gap. The internal stress of each diaphragm layer in the diaphragm structure of the piezoelectric MEMS sound production unit due to the process can be reduced by arranging the slotting gap; the flexible material is adopted to cover the slotting gap, the flexibility of the vibrating diaphragm structure can be improved, meanwhile, sound leakage of the piezoelectric MEMS sound production unit at low frequency is reduced, the vibration amplitude and the emission sound pressure level are improved, the flexible material with low density is adopted to replace a silicon vibrating diaphragm with high density, the quality of the vibrating diaphragm structure is reduced, and the cost is reduced. The flexible material reduces the quality factor Q of the resonance of the device, and is beneficial to improving a sound pressure level SPL frequency response curve and a THD frequency response curve, thereby improving the tone quality of the piezoelectric MEMS sound production unit.

The invention relates to the technical field of optical coating, in particular to a partitioned coating method for a spatial extreme ultraviolet band reflector, which aims to coat different or same films on more than two or more regions at certain intervals. The method comprises the following steps: firstly, designing more than two or more EUV wave band multilayer films, wherein the structures and the central wavelengths of the EUV multilayer films can be different; then designing an adjustable shielding coating tool which is in direct contact with the mirror surface of the reflecting mirror; the EUV wave band is plated on the surface of the cleaned reflecting mirror in a regional mode through an adjustable shielding film plating tool; and finally, testing the reflecting mirror after film coating. According to the invention, the boundary of the coating area is clear and has no shadow effect, and stray light crosstalk is reduced; and the film is good in film forming quality, small in film stress, excellent in optical performance, good in film firmness and high in space environment adaptability.

The invention relates to the technical field of glass fiber cloth, in particular to novel glass fiber cloth and a preparation method thereof.The novel glass fiber cloth comprises a base cloth layer and a functional bonding layer, and the functional bonding layer comprises, by weight, 45-55 parts of bisphenol F epoxy resin; 25 to 35 parts by weight of 2, 4-epoxy propyl oxygen-N, N-diglycidyl aniline; 15-25 parts by weight of epoxidized soybean oil; 20 to 30 parts by weight of methylhexahydrophthalic anhydride; 2-5 parts by weight of 2, 4, 6-tri (dimethylaminomethyl) phenol; 3 to 8 parts by weight of N-aminoethyl piperazine; 0.8 to 1.5 parts by weight of gamma-glycidyl ether oxypropyl trimethoxy silane; the bisphenol F type epoxy resin provides a rigid framework, the polyfunctional group monomer provides a crosslinking point, the flexible chain segment endows the material with necessary toughness, and the bisphenol F type epoxy resin, the polyfunctional group monomer and the flexible chain segment synergistically form an interpenetrating network structure with gradient characteristics.

An anti-arching and mirror surface protection method for mirror surface stainless steel welding comprises the following steps that (1) a mirror surface stainless steel plate is fixed, the mirror surface stainless steel plate is placed on a carbon steel plate, and a mirror surface protection film and a pressing block are sequentially placed on the mirror surface stainless steel plate; the thickness of the mirror surface stainless steel plate is 5-8 mm, and the thickness of the carbon steel plate The carbon steel plate needs to be preheated before welding, and the preheating temperature is 60-100 DEG C; (2) the mirror surface stainless steel plate is welded, and flux-cored wire gas shielded welding is adopted in the welding method; the diameter phi of a welding wire ranges from 1.2 mm to 1.4 mm, the welding current ranges from 180 A to 210 A, the welding voltage ranges from 23 V to 27 V, the welding speed ranges from 200 mm / min to 240 mm / min, and the flow of shielding gas CO2 ranges from 15 ml / min to 20 ml / min; (3) symmetric welding is adopted in the welding sequence; during welding, welding is conducted from the center of a welding seam to the two sides, and welding stopping is conducted at the position 10-50 mm away from the end of the mirror surface stainless steel plate And (3) polishing after welding: polishing the welding burning loss part of the mirror surface stainless steel until the mirror surface state is polished.

The invention provides a preparation method of a high-damping titanium alloy ultrafine wire difficult to machine and deform. The preparation method comprises the following steps: (1) smelting a cast ingot; (2) homogenization treatment; (3) forging treatment; (4) groove rolling; (5) cold drawing processing; and (6) annealing treatment. The high-oxygen-content damping titanium alloy is reasonable in conception, and the machining deformation capacity of the high-oxygen-content damping titanium alloy is improved through a component micro-control and heterogeneous structure toughening technology; and by combining the traditional preparation and processing technology of the titanium alloy wire, the difficulty and threshold of material preparation are reduced, the problem of preparation and processing of the high-oxygen-content damping titanium alloy ultrafine wire is solved, and the method is suitable for large-scale production, popularization and application of fasteners, elastic components and the like.

The invention discloses a plate processing technology, and aims to provide a plate arc-shaped surface processing method which is characterized by comprising the following steps: S1, plate pretreatment; s2, plate heating; s3, preparing a bending die; s4, the plates are placed and pressurized; s5, bending processing is carried out; s6, cooling treatment; s7, surface quality detection; s8, size detection; s9, post-processing the plate; and S10, final detection and packaging. Compared with the prior art, the plate arc-shaped surface machining method has the advantages that high-quality arc-shaped surface machining of the plate can be effectively realized; through a series of process steps of systematic pretreatment, heating, bending, cooling and the like on the plate, it is guaranteed that the plate does not deform or crack in the machining process, and the surface quality and the size precision of the bent plate can also be guaranteed; the invention is suitable for the technical field of plate processing.

The application relates to the technical field of zirconium-niobium alloy material processing, in particular to a preparation method of a large-diameter zirconium-niobium alloy pipe for nuclear industry, which comprises the following steps: S1, mixing nuclear-grade sponge zirconium and niobium scraps, or mixing zirconium-niobium alloy, zirconium dioxide and iron; melting the mixture and preparing a zirconium-niobium alloy ingot; S2, sequentially performing large deformation forging in a beta single-phase zone and an alpha+beta two-phase zone; S3, drilling a central hole in the axial direction of a round-forging blank; quenching in the beta single-phase zone; S4, coating an anti-galling agent on the surface of the central hole and heating to prepare a pipe blank in the mode of cross piercing; S5, performing periodic forging and rolling on the pipe blank; S6, annealing the hot-rolled pipe twice; and straightening the hot-rolled pipe after the second-stage annealing. The zirconium-niobium alloy pipe has uniform microstructure, good mechanical properties and corrosion resistance, the production direction of the brittle hydride is nearly parallel to the circumferential direction of the pipe, and brittle damage of the pipe wall thickness caused by the crack propagation of the hydride is avoided.

This utility model relates to the field of cooling equipment, specifically to a gear steel slow cooling device for improving the flaw detection pass rate. The device includes a frame located at the outlet of the crystallizer. Multiple cooling units are spaced apart on the frame. Each cooling unit includes four telescopic rods, adjacent rods being perpendicular to each other. Spray nozzles are connected to the ends of the telescopic rods, and each nozzle is connected to a flexible metal hose. A main water supply pipe is mounted on the frame, connected to a water supply unit. Multiple branch pipes are installed on the main water supply pipe, each corresponding to a cooling unit. Each branch pipe is equipped with an electrically controlled valve and connected to its corresponding flexible metal hose. Multiple infrared temperature sensors are spaced apart on the frame. This utility model regulates the cooling rate of the gear steel continuous casting billet, allowing for slow cooling, reducing internal stress, minimizing cracks, and improving the flaw detection pass rate.

The utility model relates to the technical field of medical instruments in the orthopedics department, and discloses a proximal femur special-shaped block and a bridge connecting and fixing device.The bridge connecting and fixing device is composed of a connecting rod, the proximal femur special-shaped block, a second fixing part and a third fixing part, and the proximal femur special-shaped block comprises a first fixing part; a top threaded hole is formed in the top of the first fixing part, a middle-position rear side threaded hole is formed in the middle-position rear side, a middle-position front lower side threaded hole is formed in the middle-position front lower side, a middle-position lower inclined threaded hole is formed in the middle-position lower portion, a middle-position bottom threaded hole is formed in the middle-position bottom, a first through hole is formed in the bottom, and a second through hole is formed in the top. According to the utility model, the internal stress caused by extrusion of screws at adjacent holes and bending positions can be reduced, so that the fracture of the device is avoided, and the effects of relieving the internal stress and reducing the weight can also be achieved due to the arrangement of the through holes.

This invention belongs to the field of spinning technology and relates to a coarse denier, low-pore polyester medium-oriented yarn and its production method. The production method involves extruding the melt from the spinneret's orifices, then sequentially passing through a windless zone, a transition zone, and a side-blown cooling zone. The windless zone and transition zone are the upper and lower sections of the same cylindrical component, respectively. Different spinnerets correspond to different cylindrical components, and the cylindrical components do not directly contact the spinnerets. The upper section of the cylindrical component has no through holes in its wall; the lower section has through holes on its wall to guide ambient air into the interior of the cylindrical component and prevent turbulence inside. The length of the windless zone is 5-6 cm, and the length of the transition zone is 6-10 cm. The percentage difference in wind speed between the side-blown cooling zones is no higher than 10%, where the percentage difference is calculated as (maximum wind speed - minimum wind speed) / maximum wind speed × 100%. This production method achieves uniform cooling of the inner and outer layers, resulting in coarse denier, low-pore polyester medium-oriented yarn with advantages such as high breaking elongation.

The application belongs to the technical field of putty, and particularly relates to a high-temperature-resistant CHPO curing putty with good polishing performance and a preparation method thereof. The high-temperature-resistant CHPO curing putty with good polishing performance comprises an A component and a B component. The A component comprises the following raw materials in parts by weight: linseed oil modified unsaturated polyester resin 140-160 parts, oleic acid modified air-drying unsaturated polyester resin 40-60 parts, dicyclopentadiene modified unsaturated polyester resin 90-110 parts, styrene 30-40 parts, drier 5-8 parts, accelerator 0.1-1.2 parts, dispersant 3-5 parts, thixotropic agent 8-12 parts, titanium white powder 12-16 parts, talc powder 400-500 parts, and pre-expanded polymer microspheres 5-10 parts. The application effectively solves the problems of poor polishing performance, poor adhesion to water-based epoxy primer and poor high-temperature resistance of traditional CHPO curing putty.

This application relates to the field of battery technology, providing an electrode sheet and a battery cell. The electrode sheet includes a current collector and a tab. The current collector is the main component of the tab, and the tab is connected to the current collector. The tab can be connected to an external structure to conduct electricity. Both the tab and the current collector are thin sheet structures. When the electrode sheet passes through a conveyor roller and the moving direction of the electrode sheet switches between horizontal and vertical directions, the tab will bend along the arc-shaped surface of the conveyor roller. The tab separator groove can divide the tab into at least two parts, which can reduce the internal stress of the tab during bending deformation and prevent the tab from tearing when bending and deforming through the conveyor roller. This can result in a higher yield rate during the preparation of the electrode sheet of this application and reduce the preparation cost of the electrode sheet.

This invention relates to a method for preparing high-performance aluminum alloy radiator plates. The method involves controlling the iron-silicon ratio of the main impurity component in the melt to be no less than 1.9 to reduce internal cracks in the cast billet and decrease the machining deformation rate of the finished product. This is achieved by adding aluminum-titanium alloy and a grain refiner in the furnace and online runner, while ensuring that the titanium content in the aluminum alloy ingot is maintained within a reasonable range, resulting in an ingot grain size ≤1. This improves the mechanical properties, uniform microstructure, and refined grains of the aluminum alloy radiator plate. Simultaneously, a small amount of copper is added, and the final rolling temperature is controlled at 330-360℃, resulting in fully recrystallized grains within the aluminum alloy plate. This improves the strength of the aluminum alloy radiator plate while eliminating anisotropy in its internal mechanical properties and reducing internal stress, ultimately yielding a high-performance aluminum alloy radiator plate.