241results about How to "Stable mechanical properties" patented technology

The invention belongs to the technical field of preparation of boron carbide ceramics, and particularly relates to a preparation method of high-purity porous boron carbide ceramics based on high-frequency induction heating, under the condition that a sintering aid is not added, a plunger is forced to move downwards due to volume expansion caused by CO2 generated by a melt, so that boron carbide powder is pressurized, the effect of hot pressing sintering can be achieved, and the effect of high-purity porous boron carbide ceramics can be achieved. The problems of low yield and high cost caused by the use of a hot-pressing sintering furnace can be avoided, the comprehensive performance of the prepared boron carbide ceramic can be improved, the process is easy to control, and the method is suitable for mass production of the boron carbide ceramic round rod for the high-temperature gas cooled reactor nuclear control rod; the prepared boron carbide ceramic has the advantages of pure phase, high porosity, uniform pore structure and stable mechanical property, especially has very good pore connectivity, and can ensure timely discharge of helium and improve the safety of the nuclear control rod when being used as a high-temperature gas cooled reactor nuclear control rod.

The invention discloses an aluminum alloy extrusion forming production process, which relates to the technical field of extrusion production, and comprises the following steps: designing an extrusion die, carrying out surface heat treatment on the extrusion die, selecting an aluminum alloy material, heating and extruding, carrying out surface treatment processing on a produced aluminum alloy profile, and packaging the aluminum alloy profile after the aluminum alloy profile is inspected to be qualified. Compared with the prior art, the method has the advantages that the grain structure of the profile can be more uniform and refined by accurately regulating and controlling the complex relation among parameters such as the extrusion temperature, the mold temperature, the extrusion speed and the lubricating condition, so that the mechanical property is enhanced, like a 6063 aluminum alloy profile, the tensile strength can be improved, the yield strength is improved, deformation or damage in the using process is effectively avoided, and meanwhile, the service life of the profile is prolonged. Good parameter matching can effectively reduce internal defects of the profile, metal can flow in a mold more smoothly, internal pores, cracks and other defects caused by non-uniform metal flow are reduced, and the surface quality is greatly improved.

The invention relates to a manufacturing method of a small-caliber nickel-copper alloy seamless heat exchange tube. The manufacturing method comprises the steps that S1, a UNS N04400 round steel material is subjected to peeling, PT inspection, shearing, centering, grinding, heating, perforating, water cooling and inspection; s2, a hot-punched blank is only cleaned, and inspection is conducted after point grinding is conducted after internal and external polishing; s3, the obtained pipe blank is subjected to first-pass intermediate product cold rolling, deoiling, straightening, pipe cutting, grinding, inspecting and cleaning; s4, second-pass intermediate product cold rolling, deoiling, heat treatment, straightening, pipe cutting, grinding, inspection and cleaning are conducted; S5, finished product cold rolling is conducted; s6, deoiling a finished product; s7, heat treatment of a finished product; s8, straightening a finished product; s9, performing ultrasonic vortex treatment, water pressure treatment and pipe cutting on a finished product; and S10, finished product surface inspection, size inspection, cleaning, mark spraying and finishing procedures are carried out. The method has the advantages of high one-time inspection qualification rate, yield and dimensional precision of products, good inner and outer surface quality, stable structure performance and high practicability.

The invention discloses a carbon ceramic composite conductive microsphere, a ceramic resistor and a preparation method, and belongs to the technical field of production of special materials of electrical equipment, and the method comprises the following steps: sequentially dipping porous mullite in a precursor solution of carbon and slurry containing carbon black, and carrying out drying treatment and carbon burying sintering to obtain the carbon ceramic composite conductive microsphere; the preparation method comprises the following steps: preparing a ceramic raw material, performing vacuum-assisted centrifugal impregnation on the ceramic raw material and slurry consisting of a binder in pug consisting of the ceramic raw material and a surfactant, sequentially performing drying and glue discharging treatment, primary isostatic pressing forming and air pressure sintering, cooling to room temperature, and performing mechanical treatment and electrode spraying to obtain the ceramic resistor. Impregnation improves the dispersibility and uniformity of the carbon material in the porous mullite to form a continuous conductive path, the carbon black-containing slurry improves the conductivity of the ceramic resistor, carbon-buried sintering generates in-situ carbon with abundant types, the combination of carbon and a ceramic interface is promoted, and the oxidation resistance, mechanical properties and electrical properties of the ceramic resistor are improved.

The invention discloses a manufacturing method of a UNS N06690 alloy seamless heat exchange tube, which belongs to the technical field of material processing, and comprises the following steps of: (1) performing peeling, PT inspection, shearing, centering, grinding, heating, perforating, water cooling and inspection on a round steel material; (2) carrying out acid pickling on the hot-punched blank, and then carrying out incoming material inspection and inner and outer surface grinding; (3) two-pass intermediate product cold rolling is carried out, and after cold rolling, intermediate product deoiling, intermediate product heat treatment, intermediate product straightening, intermediate product pipe cutting, acid pickling, intermediate product grinding and repairing and intermediate product inspection are carried out; (4) carrying out finished product cold rolling; (5) deoiling a finished product; (6) performing heat treatment on a finished product; (7) straightening a finished product; (8) carrying out finished product ultrasonic eddy current, water pressure and pipe cutting, sampling during pipe cutting, and carrying out physical and chemical tests; and (9) the obtained steel pipe is subjected to the procedures of finished product surface inspection, size inspection, cleaning, mark spraying and finishing and finally packaged and warehoused, and the product produced through the method is high in one-time inspection qualification rate and high in yield.

The invention provides a chitosan-based hydrogel optical fiber material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. Chitosan is modified by methacrylic anhydride to obtain a matrix solution of the hydrogel optical fiber, the reaction performance of the chitosan is enhanced, the modified chitosan and acrylamide are mixed, the mixture is irradiated by ultraviolet light to obtain the hydrogel fiber, then the hydrogel fiber is coated with a polyacrylamide solution, the chitosan with a high refractive index is used as a fiber core, and the hydrogel optical fiber is prepared. Acrylamide with excellent mechanical property is used as a coating layer, the problem of large light loss caused by insufficient refractive index of most of hydrogel is effectively avoided, the optical performance of the hydrogel optical fiber is improved, the prepared chitosan-based hydrogel is used as an optical fiber material, the biocompatibility and biodegradability of a brain-computer interface can be improved, and the application prospect is wide. The preparation method is simple and easy to operate.

The invention discloses a continuous annealing process for TA4 cold-rolled titanium strip coils, which comprises the following steps: S1, surface degreasing: degreasing TA4 cold hard coils to remove oil stains on the surfaces; s2, continuous annealing of the material coil: introducing protective gas into a continuous annealing furnace, continuously heating to 520-650 DEG C, feeding the TA4 titanium strip coil into the furnace, carrying out continuous annealing, and carrying out titanium strip coil running by a rolling machine at a set running speed and tension; and S3, the material strip is cooled, specifically, the titanium strip is cooled in the cooling section of the continuous furnace, and a titanium strip coil is wound through a winding machine. The TA4 titanium strip coil manufactured through the technological process of surface degreasing, continuous annealing and cooling is stable in tensile strength, yield strength and ductility and meets the use standard.

The invention belongs to the technical field of biological materials, and particularly discloses a blood vessel biological patch and preparation thereof, the blood vessel biological patch has the maximum tensile elongation of 20.1-35.1%, the elastic deformation rate of 15.1-29.4%, the value of the elastic deformation rate accounting for the maximum tensile elongation is 54-90%, and the bursting strength is 38-55N. The blood vessel biological patch provided by the invention can effectively reduce bleeding at the suture after carotid endarterectomy and prevent the problem of unstable performance of the biological patch.

The invention discloses a preparation method of a photo-thermal super-hydrophobic anti-icing composite coating. The preparation method comprises the following steps: dispersing micron-scale particles and nano-scale particles in a solvent, and adding a dispersing agent to obtain a uniform mixture solution; spraying the mixture solution on the surface of a substrate by using a spray gun to obtain the photo-thermal super-hydrophobic anti-icing composite coating; the prepared photo-thermal super-hydrophobic anti-icing composite coating has the characteristics of super hydrophobicity, low adhesion, photo-thermal property, icing resistance and strong mechanical stability. The preparation method is simple, scientific in process, wide in application scene and especially suitable for power transmission lines.

The invention relates to a double-effect carbon clamping cloth with a regeneration function for an air purifier and a preparation method of the double-effect carbon clamping cloth, and the preparation method comprises the following steps: S1, uniformly mixing TiO2, K2CO3 and La (NO3) 3, roasting, immersing into a metal acid solution for dipping, taking out, drying and activating to obtain a heat release material; s2, ball-milling the heat release material obtained in the step S1 until the heat release material is uniform, and then adding a dispersing agent to obtain heat release material spraying liquid; s3, spraying the heat release material spraying liquid obtained in the step S2 on one side of a polyester non-woven fabric for multiple times to obtain a heat release skeleton layer; s4, a first hot melt adhesive net film, a first activated carbon layer and a second hot melt adhesive net film are sequentially laid on the non-spraying face of the heat-releasing framework layer obtained in the S3, after hot-pressing fixing is conducted, a second activated carbon layer, a third hot melt adhesive net film and melt-blown cloth are sequentially laid, hot-pressing forming is conducted, and the double-effect carbon clamping cloth with the regeneration function for the air purifier is obtained. Compared with the prior art, the filter material with the regeneration function is provided, the service life of a filter is prolonged, and the user cost is reduced.

The invention belongs to the field of tendon repair in biomedical materials, and provides a gradient mineralized collagenous fiber membrane and a preparation method thereof. And vertically placing the collagenous fiber membrane at the bottom of the container, and adding mineralizing liquid to prepare the gradient mineralized collagenous fiber membrane. The prepared high-orientation collagenous fiber membrane comprises a gradient mineralization layer and a non-mineralization layer, the gradient mineralization layer comprises an I-type collagen component and a HAp component in spatial gradient distribution, and the non-mineralization layer is composed of the I-type collagen component. The GMA-Col provided by the invention has an aligned layered fibrous structure, shows enhanced mechanical properties in the alignment direction, and is beneficial to spatial continuous change of mechanical rigidity. The differentiation surface morphology, the mineral content, the rigidity and the wettability of the local area can influence the adhesion, proliferation and differentiation of cells to a certain extent, and the mechanical property of the healing injury part and the recovery of the animal movement function are remarkably enhanced by implantation of the bone marrow bone marrow bone marrow bone marrow bone marrow bone marrow bone marrow bone marrow bone marrow.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a palladium catalyst for hydrogen peroxide production by an anthraquinone process, which comprises the following steps: at a certain temperature, alumina powder is impregnated in a palladium salt solution for equivalent-volume impregnation for a certain time, and alumina comprises gamma-Al2O3 and alpha-Al2O3; after impregnation is completed, deionized water is added into the solid, chloride ions are removed through electro-adsorption after ultrasonic treatment, and then a filter cake is obtained through filtering; according to the preparation method of the palladium catalyst, the aluminum oxide with the crystal phase in the specific proportion is matched with the ultrasonic treatment and the electro-adsorption method, the prepared catalyst has the advantages of being high in selectivity, good in catalytic activity and mechanical property and stable in product quality, chloride ions are easy to remove, and waste of a large number of water resources is avoided.

The invention discloses a modified PPS fiber filter material and a preparation method thereof, and belongs to the technical field of filter materials. Comprising the following raw materials in parts by weight: 60-80 parts of PPS resin, 6-18 parts of modified boron carbide and 10-20 parts of an ethylene-octylene copolymer. The filter material prepared by the invention takes polyphenylene sulfide as a matrix, so that the filter material is endowed with excellent strength, high temperature resistance and corrosion resistance; wherein the ethylene-octylene copolymer can improve the toughness of the filter material; wherein the modified boron carbide is good in compatibility with a matrix, the oxidation resistance, the heat resistance and a certain degree of mechanical properties of the filter material can be remarkably enhanced, and the properties are long and stable; therefore, the filter material prepared by the invention is excellent in corrosion resistance, also has stable and efficient oxidation resistance, heat resistance and mechanical properties, and has important application value in the technical field of filter materials.

The invention provides a high-performance thermoplastic starch-based TPS / PBAT blended plastic and a preparation method thereof. The preparation method comprises the following steps: preparing pre-plasticized starch, carrying out melt blending on the obtained pre-plasticized starch TPS, poly (butylene adipate-co-butylene adipate) PBAT, a grafting agent and an initiator, cooling, and drying to obtain a grafting material; and putting the grafted material and a cross-linking agent into an internal mixer for melt blending, cooling and drying to obtain the high-performance thermoplastic starch-based blended plastic TPS / PBAT. The method is suitable for industrial large-scale mass production and recycling treatment, the recycling treatment can be realized by directly adopting plastic processing methods such as an internal mixer and an extruder, and the high-performance thermoplastic starch-based blended plastic can be obtained again under the condition that the molecular chain part is degraded.

The invention discloses a paper folding type piezoelectric energy collector for collecting low-frequency energy. The paper folding type piezoelectric energy collector comprises a piezoelectric composite material paper folding cylindrical structure and two side end faces. The piezoelectric composite material origami cylindrical structure is obtained by bending and folding a planar piezoelectric composite material along a peak fold line and a valley fold line. In the bending process, the bent piezoelectric ceramic composite material can be manufactured by controlling external force in the sintering process. According to the invention, piezoelectric ceramic 3D printing is combined with a novel material inspired by paper folding. The piezoelectric ceramic suspension is used as 3D printing ink. The novel material structure is based on a Kresling origami cylindrical surface, but creases are hidden, the effective collection area is increased, and the electrical performance is improved. The multi-stable Kresling origami structure has low rigidity and a low energy barrier, so that energy collection in a low-frequency environment becomes possible, and the multi-stable Kresling origami structure is particularly suitable for ocean wave energy collection application.

The invention relates to the field of metal material casting, and discloses a production method of green sand as-cast high-plasticity nodular cast iron QT800-5, which comprises the following steps: preparing pig iron, waste steel and foundry returns, and using auxiliary materials such as a silicon carbide pretreating agent, a high-temperature graphitization carburant, a rare earth magnesium silicon iron nodulizing agent, a silicon barium nucleating agent and a silicon strontium nucleating agent to prepare the green sand as-cast high-plasticity nodular cast iron QT800-5. The purity and component stability of molten iron are ensured; in the smelting process, purification and adjustment are carried out through temperature control and segmented addition of auxiliary materials, then spheroidizing is carried out through a pouring method, and the microscopic structure of a casting is optimized through ladle-to-ladle inoculation and stream inoculation; the final casting has excellent mechanical properties including the tensile strength larger than or equal to 800 MPa, the yield strength larger than or equal to 480 MPa, the elongation larger than or equal to 5% and the matrix pearlite content larger than or equal to 80%. The production process disclosed by the invention is simplified, is suitable for large-scale industrial production, and has a wide application prospect in lightweight application requiring high-strength and high-plasticity materials.

The invention provides a cubic tin selenide-based thermoelectric crystal and a preparation method thereof, and relates to the technical field of crystal synthesis. The preparation method comprises the following steps: weighing tin, silver, antimony and selenium simple substances, putting into a first container, vacuumizing and sealing; raising the temperature of the first container to 953-1373K, and keeping the temperature for 15-30 hours; taking out the alloy ingot after cooling, putting the alloy ingot into a second container, vacuumizing and sealing; and heating the second container to 973-1373K, carrying out heat preservation for 5-30h, cooling the second container to 923-1173K at a first cooling rate, cooling the second container to 873-923K at a second cooling rate, and cooling the second container to room temperature at a third cooling rate. The blocky cubic tin selenide single crystal material is prepared, the extremely high grain orientation degree is achieved, and the high-performance thermoelectric material can be obtained.

The invention discloses steel with excellent surface quality for a power battery shell and a manufacturing method thereof. The steel for the power battery shell comprises the following chemical components in percentage by weight: 0.015%-0.025% of C, less than or equal to 0.030% of Si, 0.10%-0.20% of Mn, less than or equal to 0.01% and less than or equal to 0.02% of P, less than or equal to 0.012% of S, 0.03%-0.08% of Cr, 0.02%-0.05% of Alt, 0.002%-0.005% of B and the balance of Fe and inevitable impurities. The cold-rolled sheet for the low-carbon deep-drawing battery shell is produced mainly by accurately controlling components in steel and through the working procedures of hot rolling, layer cooling, acid rolling, annealing and leveling. According to the cold-rolled steel plate produced by the method, the yield strength is 190-260 MPa, the tensile strength is 320-390 MPa, the ductility is larger than or equal to 38%, the HR30T range is 45-50, and the cold-rolled steel plate has the high-speed stamping capacity, certain anti-pressure capacity and excellent surface quality.

The invention relates to the technical field of electric wires and cables, in particular to an outdoor high-temperature-resistant and corrosion-resistant photovoltaic cable and a preparation method thereof.The preparation method comprises the steps that a pretreated copper rod is fed into a wire drawing machine and gradually drawn into copper wires with the preset diameter through a multi-stage wire drawing die, and a stranding machine is adopted for stranding multiple strands of copper wires into a conductor according to the specific direction and pitch; carrying out preheating treatment on an insulating material, feeding the preheated insulating material into an insulating extruder, and uniformly extruding the insulating material on a conductor through a mold to form an insulating layer; covering the insulating layer with a shielding material by adopting a braiding machine, and cooling the insulated and shielded cable; feeding a sheath material into a sheath extruder, extruding the sheath material outside the shielding layer through a mold, feeding the extruded cable into a cooling water tank, and pulling the cable to pass through a shaping device; and the cooled and shaped cable is rolled, so that the produced photovoltaic cable has excellent corrosion resistance and can effectively resist corrosion of various corrosive substances in an outdoor environment.

The invention relates to a wire rod for a high-strength steel gas shielded welding wire and a production method. The wire rod comprises the following chemical components in percentage by weight: 0.060%-0.090% of C, 0.52%-0.65% of Si, 1.62%-1.73% of Mn, less than or equal to 0.014% of P, less than or equal to 0.009% of S and 0.060%-0.090% of Ti. The alloy comprises the following components in percentage by weight: 0.50-0.60% of Ni, 0.30-0.40% of Mo, less than or equal to 0.010% of Ca, less than or equal to 0.0060% of N and The method has the advantages that the steel wire rod for the gas shielded welding wire is produced through a converter, LF refining, small square billet continuous casting, heating furnace heating, controlled rolling and controlled cooling rolling and a heat preservation channel. The tensile strength of the wire rod is 743-789 MPa, the elongation is 22%-25.5%, and the requirements for the mechanical property, the drawing property and the welding seam quality of the wire rod are met.

The present invention belongs to the field of hot rolling process, and particularly relates to a control method and system for the iron scale on the surface of hot rolling strip, which is applied to the laminar cooling back-end cooling mode: before the strip enters the laminar cooling zone back-end, the corresponding strip surface iron scale control water cooling mode is selected to be turned on according to the properties of the rolled product itself; the strip is controlled to enter the air cooling section after the final rolling of the finishing mill according to the selected water cooling mode for the iron scale on the surface of the strip to control the iron scale on the surface of the strip; after the control is completed, the strip enters the laminar cooling zone back-end for laminar cooling until the strip reaches the target coiling temperature. The control method can reduce the thickness of the iron scale on the surface of the strip to less than 15μm, with a dense structure, and it is not easy to fall off in large pieces / sheets to form black ash, and at the same time, it also realizes the prefabrication of cracks in the iron scale layer on the surface of the strip to a certain extent, and improves the pickling efficiency by 15%-20%.

The invention discloses novel copper plate strip alloy composition heat treatment equipment, and relates to the technical field of copper plate strip alloy heat treatment.The novel copper plate strip alloy composition heat treatment equipment comprises a fixing frame, a heating furnace is installed on the upper surface of the fixing frame, and a feeding port and a discharging port are formed in the two ends of the heating furnace respectively; according to the equipment, copper plate strip alloy is conveyed into the heating furnace at a constant speed, it is guaranteed that the standing time of the copper plate strip alloy in the heating furnace is consistent, then the time of heat treatment on the copper plate strip alloy in the heating furnace is the same, and different positions of the copper plate strip alloy are subjected to heat treatment with the same effect; and the end, entering the heating furnace, of the copper strip alloy is always located on the same horizontal plane as the feeding port of the heating furnace, so that the copper strip alloy is prevented from being bent or twisted due to the fact that the height of the end, entering the heating furnace, of the copper strip alloy is different from that of the feeding port, and material deformation is prevented.

The invention relates to the technical field of fireproof glass, in particular to a nano composite material coating and a preparation method for applying the nano composite material coating to a surface film layer of an initial substrate for single-piece non-heat-insulation fireproof glass. The nano composite material coating is prepared from the following raw materials in parts by weight: 50-80 parts of nano composite oxide, 10-15 parts of a toughening material, 15-30 parts of molten glass and 1-5 parts of a fluxing agent; the preparation method comprises the following steps: S1, by taking a fluxing agent as a medium, mixing a nano composite oxide and a toughening material, grinding for 1-2 hours, adding a glass melt into the mixture, continuously grinding for 2-3 hours, heating to 180-220 DEG C, carrying out heat treatment, and removing the fluxing agent, so as to obtain a nano composite material; and S2, depositing on the surface of the glass substrate by adopting a physical vapor deposition method or a chemical vapor deposition method to form the nano composite material coating. According to the nano composite material coating prepared by the method, the toughness and the impact strength of the glass are improved, the fire-resistant integrity time of the glass is prolonged, and meanwhile, the light transmittance and the ultraviolet radiation resistance of the glass are better.

The invention relates to the technical field of engineering plastic preparation, in particular to a wear-resistant engineering plastic master batch and a preparation method thereof.The preparation method comprises the following steps that S1, polyamide resin is subjected to degassing treatment in a vacuum environment; s2, performing surface pretreatment on nano aluminum oxide and a silane coupling agent; s3, mixing the polyamide resin, the polytetrafluoroethylene powder, the nano aluminum oxide, the modified polyethylene and the graphite micro powder to form a mixture A; s4, sequentially adding the epoxy resin, the antioxidant and the ultraviolet light absorber to form a mixture B; s5, carrying out composite extrusion to form a master batch matrix; and S6, carrying out cooling granulation treatment on the extruded master batch matrix, and carrying out antistatic coating treatment on the surface of the master batch to obtain a final wear-resistant engineering plastic master batch finished product. According to the invention, through uniform dispersion of multiple components and enhancement of binding force, high wear resistance, aging resistance and storage and transportation stability are realized, and the service life of the material in a severe environment is remarkably prolonged.

The unsaturated polyester resin mixing device is characterized in that an electronic scale is arranged above the bottom of a rack, a final mixing box is arranged above the electronic scale, the upper portion of the final mixing box is communicated with a premixing box fixed to the rack through a discharging opening, a first feeding opening is formed in the upper end of the premixing box, and a second feeding opening is formed in the lower end of the premixing box; a first stirring fan blade and a first stirring rod are arranged in the premixing box, the first stirring rod is connected with one end of a linkage rod of the motor, the other end of the linkage rod is connected with a second stirring rod, a second stirring fan blade is arranged on the second stirring rod, and the second stirring fan blade is arranged in the final mixing box; a second feeding hole is formed in the upper end of the final mixing box, and a filtering plate is arranged below the second feeding hole. The material mixing device is low in cost, uniform in mixing, high in stirring efficiency and few in impurities, reduces labor input, and improves the product percent of pass.

The invention discloses a method for preparing a high-performance closed-cell perlite material by a chemical method, the prepared high-performance closed-cell perlite material is mainly used in the field of buildings, and the method comprises the following steps: S1, expanding; s2, film covering; s3, dispersing; s4, grading; according to the invention, a layer of silica sol film is formed on the surface of the closed-cell perlite, the film layer not only significantly reduces the volume shrinkage of the closed-cell perlite in the subsequent slurry stirring process, but also effectively hinders the expansion of cracks in the perlite and greatly reduces the cracking risk, and meanwhile, the heat conductivity coefficient of the material is also reduced by film coating treatment, so that the thermal conductivity of the material is improved. The thermal insulation performance is obviously improved; according to the drying furnace, through cooperative use of the drying mechanism and the adjusting mechanism, the air outlet pipe can be driven to swing up and down in a reciprocating mode, so that the air blowing angle of the air outlet pipe is adjusted according to use requirements, hot air can be blown to different areas in the furnace body, the air blowing range is widened, and the perlite drying effect is improved.

The invention provides a self-cleaning ceramic membrane security filtration system. The self-cleaning ceramic membrane security filtration system comprises a ceramic membrane security filter; the ceramic membrane security filter comprises a bottom shell, a filter cavity and an upper cover; a plurality of internal pressure type ceramic membrane tubes are mounted between the bottom flow guide disc and the top flow guide disc; the water inlet pipe communicates to the bottom of the bottom shell; the water collecting tank is connected with the filter cavity through a connecting pipe; the elevation of the water inlet end of the water inlet pipe is higher than that of the top flow guide disc; the ceramic membrane security filtration system further comprises a siphon drainage pipe, the siphon drainage pipe comprises an inclined pipe section and a vertical pipe section, the inclined pipe section is communicated with the top of the upper cover, the vertical pipe section is communicated with the inclined pipe section, and the vertical pipe section extends downwards to the ground in the vertical direction; a siphon destroying hopper is mounted in the water collecting tank and is communicated with a connecting point of the inclined pipe section and the vertical pipe section through a siphon destroying pipe; and the maximum water level elevation of the water collecting tank is higher than that of the siphon breaking bucket. According to the invention, completely automatic filtration and self-cleaning of the internal pressure type ceramic membrane tube are realized.

The invention discloses an anti-rust performance test data analysis method and device for a metal product, and relates to the technical field of metal product production. According to the anti-rust performance test data analysis method for the metal product, the metal product mechanical performance test data set is obtained and analyzed, whether the metal product mechanical performance of the metal product is qualified or not is judged, and if the metal product mechanical performance of the metal product is qualified, the anti-rust performance of the metal product is judged. If yes, the metal product is marked as that the mechanical performance of the metal product is qualified, and if the mechanical performance of the metal product is not qualified, the unqualified grade of the mechanical performance of the metal product is determined; the comprehensive evaluation method has the advantages that the performance of the metal product in practical application can be more comprehensively known by carrying out mechanical performance testing, environmental oxidation performance testing and anticorrosive coating performance testing on the metal product through the comprehensive evaluation mode, the performance under different environmental conditions can be evaluated, and the metal product suitable for a specific application environment can be selected.

The invention relates to the technical field of foamed silicone rubber and production and preparation processes, in particular to high-hardness foamed silicone rubber and a preparation method thereof.The high-hardness foamed silicone rubber is prepared from 1-20 parts of hydrogen-containing polysiloxane, 10-70 parts of hydroxyl-terminated polymethylvinylsiloxane, 1-30 parts of a mechanical reinforcing agent, 10-80 parts of a flame retardant and 0.05-0.3 part of a catalyst; the mechanical reinforcing agent is a mixture which simultaneously uses fumed silica, vinyl MQ silicon resin and surface-treated carbon nanotubes, so that the foamed silicone rubber has high hardness and does not increase the density, and meanwhile, by utilizing the shear thickening gel which is filled and adsorbed in the carbon nanotubes, when the foamed silicone rubber material is pressed, the foam silicone rubber material is not easy to deform. According to the present invention, the carbon nano-tube can rapidly harden, such that the originally soft carbon nano-tube can form the skeleton support on the foamed silicone rubber so as to improve the compressive strength and the permanent deformation property of the foamed silicone rubber, such that the foamed silicone rubber material with characteristics of good hardness, low density, excellent compressive strength and excellent resilience can be used for new energy battery support.

The invention relates to the technical field of composite material preparation, and specifically discloses a composite preparation process for enhancing the mechanical properties of marine laminated wood. Wood powder, epoxy resin, antibacterial modified basalt fiber-titanium dioxide, a stabilizer and a curing agent are uniformly mixed, kneaded in an open mill, and hot-pressed in a hot press to obtain the marine laminated wood. The antibacterial modified basalt fiber-titanium dioxide contains a large number of active groups, which can form a three-dimensional staggered support network in a matrix, generate a cross-linked network structure, and effectively improve the mechanical properties of the matrix. The epoxy resin is used as an adhesive with strong bonding force, and can tightly bond the wood powder and other materials together, thereby reducing the waste of wood and improving the utilization rate of wood to achieve environmental benefits, forming a laminated wood with stable structure and high strength. Through a curing cross-linking reaction, a mesh structure can be formed, which further enhances the overall mechanical strength of the laminated wood and prolongs its service life.