31results about How to "Meet material performance requirements" patented technology

The invention relates to low alloy steel for a railway vehicle brake disc and a heat treatment method of the low alloy steel. The low alloy steel for the railway vehicle brake disc comprises chemicalcomponents including, by weight percent, 0.15%-0.30% of carbon, 0.4%-1.0% of silicon, 0.4%-1.0% of manganese, 0.6%-1.4% of chrome, 0.4%-1.2% of nickel, 0.2%-0.6% of molybdenum, 0.15%-0.4% of vanadium,0.15%-0.35% of copper, 0.1%-0.3% of tungsten, 0.025%-0.045% of niobium, 0.025%-0.045% of zirconium, and the balance ferrum and Re, Al and unavoidable impurities, wherein the Re, the Al and the unavoidable impurities are left in purification. According to the low alloy steel, based on the characteristics of the railway vehicle steel brake disc in the service working condition, the environment andthe forming process, material component design is carried out on the aspects of improving the high-temperature strength of the material, enhancing weather ability, refining grains, improving plasticity and the like, a proper forging ratio and a proper quenched-tempered heat treatment process are selected, and the mechanical performance of the material at the room temperature can meet the materialperformance requirement of a forged steel brake disc or a cast steel brake disc. For the condition of different scales of smelting, different control methods for the material purity degree are put forward to improve the purity degree of alloy steel.

The invention relates to a deicing and anti-icing fluid, particularly a non-Newtonian fuselage deicing and anti-icing fluid and a preparation method thereof. The non-Newtonian fuselage deicing and anti-icing fluid can reduce adhesion of ice on the object surface to eliminate and prevent icing on the aircraft fuselage surface, and has superlong anti-icing retention time. The non-Newtonian fuselage deicing and anti-icing fluid comprises the following components in parts by mass: 40-60 parts of freezing-point depressant, 0.05-1.2 parts of rheologic modifier, 0.01-0.3 part of anti-icing compounding agent, 0.01-3 parts of pH regulator, 0.01-3 parts of corrosion inhibitor, 0.01-0.5 part of staining agent and 40-60 parts of deionized water. The invention is based on the low-temperature rheologic research, especially aims at the low-temperature operating environment and characteristics of the deicing and anti-icing fluid, and determines the distribution and arrangement of the main chain and branch chain of the rheologic modifier as well as the preparation and acquisition method of the low-temperature conformation. By combining the anti-icing compounding agent, corrosion inhibitor and other assistants in the formula, the prepared deicing and anti-icing fluid has the characteristics of excellent shearing restorability, excellent ice adhesion inhibition capacity at 0 to -20 DEG C, and long anti-icing time.

The invention relates to the field of modified engineering plastics, in particular to a flame retardant reinforced co-polymerized nylon composite with high temperature of glowing filaments and a preparation technology thereof. The composite comprises the following ingredients: 48.7-69.6 wt% of PA66/6, 14.5-18.6wt% of polybrominated styrene, 4.3-5.5wt% of diantimony trioxide, 1.7-2.2wt% of layereddihydroxy composite metallic oxide, 0.08-0.11wt% of teflon and 10-30wt% of alkali free glass fiber. Compared with the prior art, the composite has the advantages that: the glowing filament ignition temperature GWIT is not less than 775 DEG C, the flame resistance that in accordance with 94UL-V0 standard is rated V-0 at 0.8 mm to 1.6 mm, and the composite meets VDE standard, has good low-temperature (less or equal to -30 DEG C)toughness, and satisfies the requirements of electronic components used in unattended white goods working in low-temperature (less or equal to -30 DEG C) environment to material qualities.

The invention relates to an aluminum alloy material and a manufacturing method thereof. The main component of the aluminum alloy material is aluminum. The aluminum alloy material further comprises tin, cadmium, zinc, copper, silicon, manganese, chromium, nickel and titanium. The manufacturing method comprises the following steps of (1) preheating the tin, the cadmium, the zinc, the copper, the silicon, the manganese, the chromium, the nickel and the titanium respectively, and stirring the components respectively until all the components are completely fused; (2) quickly heating all the fused components until the temperature rises up to 1,857 DEG C, and simultaneously mixing and uniformly stirring the components; (3) pouring a mixed solution of all the fused components obtained in the step (2), and performing natural cooling after pouring is completed. The aluminum alloy material can meet requirements on the material performances, particularly the performances of machining forming, surface quality, heat treatment and the like, of high-strength aluminum alloys in the field of industry; the manufacturing method is simple and is convenient to implement and popularize.

The invention discloses an antibacterial PVC door seal for a refrigerator, and relates to the technical field of refrigerator door seals. The antibacterial PVC door seal comprises the following raw materials in parts by weight: 40-50% of PVC resin powder; 30%-40% of a combined plasticizer; 0.2%-2% of an antibacterial agent; 1.5%-5% of a heat stabilizer; 15%-25% of an inorganic filler; 1%-3% of a lubricating system; and 0.2%-2% of an oxidizing agent, wherein the antibacterial agent is polyhexamethylene guanidine, and the molecular formula of the antibacterial agent is (C7H16N3Cl) n. The antibacterial agent polyhexamethylene guanidine is added into the formula, and the antibacterial PVC door seal is obtained through proportion adjustment and processing so that the door seal can achieve a long-term antibacterial effect, and the problems that theexisting refrigerator door seal is poor in long-term antibacterial stability and low in sterilization efficiency are solved.

The invention discloses a polypropylene composite material with a spraying-free and high-rigidity metal texture effect and a preparation method thereof and belongs to the technical field of macromolecular engineering plastics. The composite material is prepared from the following raw materials in parts by weight: 60-85 parts of polypropylene resin, 5-15 parts of toughener, 15-30 parts of mineral powder, 2-4 parts of color master batch, 0.3-1 part of lubricant, 0.5-1.5 parts of aluminum powder, 0.25-1 part of bright silver powder and 0.2-0.4 part of antioxidant. According to the polypropylene composite material and the preparation method thereof, physical properties of the polypropylene composite material are reasonably regulated, and the added aluminum powder and bright silver powder can enable the metal-imitating effect of the alloy material to meet the operating requirements of electrical appliance products on appearance, so that the polypropylene composite material has the advantages of good environment-friendliness, high smoothness, and the like.

The invention discloses an aluminum alloy material. The material comprises the following raw materials of aluminum ingots, magnesium ingots, aluminum-silicon alloy, copper blocks, zinc blocks, iron blocks, manganese blocks, magnesium-lanthanum alloy, dysprosium powder, aluminum-neodymium alloy, magnesium-holmium alloy, molybdenum powder, chromium powder, vanadium powder, erbium powder, silicon carbide and refining agents. The aluminum alloy material are prepared through the following steps that alloy liquid is produced and then is subjected to modification treatment, then casting molding and precooling treatment are conducted, and then quenching treatment and tempering treatment and the like are conducted. According to the aluminum alloy material, components and smelting and heat treatmentprocess parameters of the aluminum alloy are optimized, so that the tensile strength and elongation index of products are improved, the tensile strength of the aluminum alloy material reaches 128.9MPa or above, the elongation rate reaches 40.9% or above, the performance requirements of the market and existing product materials can be greatly met, and the material has the significance of wide popularization and application.

The invention discloses a method used for stable regeneration of broken stone from lime flyash. The method comprises following steps: 1) raw material preparation, wherein lime powder, flyashe, and broken stone are prepared; 2) charging according to a ratio; 3) stirring and mixing; 4) sampling; and 5) preparation of a finished product. The invention also discloses a product obtained by using the method. Preparation processes of the method are simple and are easy to realize; production efficiency is high; waste building rubbish, concrete, components, coal gangue, steel slag, waste stone, muck, shale, and flyash can be recycled effectively; environment is protected, cost is reduced greatly, and excellent economic benefits and social benefits are obtained; in addition, formula design is reasonable, the raw materials are easily available, and traditional regenerated broken stone processes are simplified effectively; compressive strength of the product is high, the product is capable of satisfying demands of buildings on material performance, is convenient for construction, is capable of shortening construction period greatly and increasing construction efficiency, and is beneficial for wide popularization and application.

The invention relates to a support of an air suspension and special high-strength cast-state ductile iron of the support. The high-yield-strength cast-state ductile iron comprises chemical componentsincluding C, S, P, Mn, Si, Cr, Sn, Mg, Re and the balance Fe. The support comprises a support body, an air spring supporting face and a middle and rear axle thrust rod base, and the support is of an integral casting structure. Compared with the prior art, according to the cast-state performance, the tensile strength sigma b is larger than or equal to 600 MPa, sigma 0.2 is larger than or equal to 400 MPa, delta is larger than or equal to 10%, the brinell hardness HB is equal to 245-287, the content of a cast-state base body is 80%, the content of cementite is 1%, the yield strength is improved,and the material performance requirement of a structure bearing piece with the medium heavy truck fatigue resisting strength can be met. In addition, the support is of the integral casting structure,welding, forging, punching and other technologies are not needed, respective assembling is not needed neither, cost is greatly reduced, and time is greatly shortened; the effective strength is guaranteed, and meanwhile material stacking is reduced as well; and the space is more compact, the lightweight degree is higher, and the fuel economy of a whole vehicle can be better improved.

The invention relates to a medium-temperature repairing rubber material, a preparation method thereof and an application thereof in a propellant, belonging to the technical field of ablation-resistantmaterials, in particular to a medium-temperature repairing thermal insulating layer material for a high-energy propellant, a thermal insulating layer capable of rapidly vulcanizing at a medium temperature, and a preparation method thereof. The vulcanization system of the invention adopts a vulcanization system of peroxide and accelerator, the thermal insulating material is difficult to absorb nitrate ester, does not affect the ablation performance of the thermal insulating layer, does not affect the interface adhesion performance of the high-energy propellant, and has good adaptability with the interface of the high-energy propellant.

The invention discloses a method for reducing the thickness of a tellurium nanosheet, and belongs to the technical field of nano materials, the method comprises the following steps: soaking the tellurium nanosheet in a weak oxidizing solution, taking out and drying to obtain the tellurium nanosheet with the reduced thickness, according to the method, the weak oxidizing solution and the surface of the tellurium nanosheet are subjected to mild oxidation reaction, the tellurium nanosheet is thinned, and accurate regulation and control of the thickness of the tellurium nanosheet can be achieved; according to the thin-layer tellurium nanosheet prepared by the method disclosed by the invention, the advantages of the p-type tellurium nanosheet can be fully played, the requirements of different devices on material performance are met, electronic and photoelectric devices based on the tellurium nanosheet can be constructed by utilizing electron beam exposure and vacuum evaporation of an electrode material, and the thin-layer tellurium nanosheet has good compatibility with a traditional semiconductor processing technology; according to the invention, multiple regulation and control of the thickness, the carrier concentration and the field effect switching ratio of the tellurium nanosheet can be realized, and support is provided for developing a two-dimensional p-type semiconductor material which is stable in performance and meets multi-scene requirements.

The invention relates to the technical field of EVA foaming material preparation, and discloses a preparation method of a corrosion-resistant EVA foaming sheet. Thepreparation method comprises the following steps: sufficiently preparing the required materials, and proportionally distributing the required ethylene-octene copolymer (POE) composite foaming material, ethylene-vinyl acetate copolymer (EVA) and EVA grafted maleic anhydride (EVA-g-MA) to obtain the corrosion-resistant EVA foaming sheet. The preparation method comprises the following steps: fully and uniformly mixing 52 parts by weight of EVA, 1-8 parts by weight of EVAgMA and 2-6 parts by weight of POE in an internal mixer. According to the preparation method of the corrosion-resistant EVA foamed sheet, the compatibility of EVA and TPU can be remarkably improved through EVA-g-MA; meanwhile, a POE material with high resilience is introduced, so that the prepared EVA/TPU/POE composite foamed material has good mechanical performance, the tensile strength is 2.09 to 2.44 MPa, the elongation at break is 278.2% to 314.2%, the tearing strength is 4.10 to 5.13 N/mm, and the peel strength is 2.70 to 3.72 N/mm. Meanwhile, the material has good resilience of 55-62%, compression set of 25-42% and low density of 0.2-0.25 g/cm3.