1361results about How to "Good self-lubricating performance" patented technology

The invention discloses a fluorine-containing polymer mixing material and a method for preparing a bulb buffer ball keyway by the same. The fluorine-containing polymer mixing material is prepared by mixing fluorine-containing polymer resin with filler modified by a coupler, and comprises the materials in parts by mass as follows: 60-99 parts of fluorine-containing polymer resin and 1-40 parts of modified filler. The filler meets the condition that the filler is stably sintered at a temperature above the melting temperature of the resin and the granularity is smaller than or equal to 150 microns; the filler does not absorb moisture; and the filler is not clustered under the sintering condition and is not reacted with the polymer. The coupler accounts for 5-40% of the filler by mass percentage. The material has excellent chemical stability, self-lubricating property, noninflammability, resistance to atmospheric aging and high and low temperature adaptability and the like as well as higher mechanical strength. The hardness can be improved through modification and the material is used to prepare wear-resisting products. The bulb buffer ball keyway is prepared from the material so that a suspension type direction control arm assembly of an automobile with high mechanical strength, good wear-resistance and a long service life is further obtained.

The invention belongs to the field of modified polypropylene composite material, and relates to a low-VOC scratch-resistant modified polypropylene composite material which is applicable to manufacturing automobile interior trim parts, and comprises the components based on the parts by weight: 60-90 parts of polypropylene, 5-20 parts of toughening agent, 5-20 parts of mineral filler, 0.1-4 parts of odor adsorbent, 5-15 parts of wear-resistant agent/scratch-resistant agent and 0.1-3 parts of auxiliary agent, wherein the odor adsorbent is a mixture of three selected from clay, bentonite, porous silicon dioxide, activated aluminium oxide or molecular sieve; and the wear-resistant agent/scratch-resistant agent is one or a mixture of two in polytetrafluoroethylene micro powder or reaction-type polyorganosiloxane. The modified polypropylene composite material not only has better impact-resistant performance and strength, but also has excellent scratch-resistant performance and low-VOC diffusion characteristic; and the needed raw materials have wide source and can be conveniently and easily obtained.

The invention relates to a computed tomography (CT) scanning heterogeneous model testing system. The system comprises a CT scanning system, a displacement system, an overburden pressure system, a pressure measurement system, a heterogeneous multilayer core clamp holder and a metering system, wherein the heterogeneous multilayer core clamp holder consists of a shell, a rubber cylinder, a core left plug, a core right plug, a left fixing sleeve, a right fixing sleeve, a left fastening sleeve, a right fastening sleeve and a fixed bracket; the core right plug is provided with a plurality of liquid outlets; each liquid outlet is respectively aligned with one layer of core model; and a strip liquid outlet sealing gasket is formed on the core right plug, which correspond to a seam between two adjacent layers of core models, so that liquid flow passing through each layer of core model flows out from the corresponding liquid outlet of each layer of core model, and thus, intraformational heterogeneous water displacing oil layered measurement is realized. By the CT scanning system, the real-time on-line monitoring of the on-way distribution of saturation of fluid on each layer section in a heterosphere is realized so as to observe the interlayer communication phenomenon.

The invention discloses an electric locomotive pantograph copper-impregnated carbon contact strip producing method. The method comprises the steps that 1, pitch coke powder, graphite powder, siliconized graphite powder and high temperature pitch are mixed according to the proportion to be ground into powder; the mixed powder is prepressed into a stage stock column, and then the stage stock column is solidified and squeezed to be molded and roasted, so that a composite carbon contact strip is obtained; 2, the composite carbon contact strip is cleaned and dried, then is cooled and placed into a graphite crucible, and is placed in an electric furnace at temperature of 1300-1400 DEG C to be preheated; copper liquid is poured into the crucible to soak the composite carbon contact strip, then the crucible is placed in an oil press cover, nitrogen is led in, heat preservation is kept for 3-5 min under the specific intensity of pressure, and finally cooling is carried after pressure releasing. According to the electric locomotive pantograph copper-impregnated carbon contact strip producing method, the electroconductibility of the copper-impregnated carbon contact strip is improved, the electrical resistivity is lowered, the mechanical strength of the carbon contact strip and copper impregnated angle can be increased, then the carbon contact strip abrasive resistance and self-lubrication are improved, the copper-impregnated carbon contact strip is more resistant to abrasion, main line damage and block dropping are avoided, the shock resistance is high, and the service life of the copper-impregnated carbon contact strip is prolonged.

The invention relates to a silicon carbide carbonized complex phase ceramic sealing material, which comprises the following component in portion by weight: 100 portions of silicon carbide powder, 0.1 to 1 portion of boron carbide, 5 to 30 portions of carbon powder, 0.5 to 3 portions of binding agent PVA, and 0.5 to 1.5 portions of dispersing agent. A preparation method comprises the following steps in turn: (1) blending the raw materials in proportion and then adding the mixture into deionized water, and after ball milling and mixing, preparing the mixture into a water-based silicon carbide composite slurry of which the solid phase weight content is between 40 and 60 percent; (2) adopting a spraying granulating process to perform spray drying on the slurry to obtain silicon carbide granulated powder; (3) adopting a two-step mode of 140 MPa dry pressing pre-compaction and 200 MPa isostatic cool pressing final compaction to carry out forming on the granulated powder to obtain a high-density sealing material blank; and (4) putting the blank into a vacuum pressureless sintering furnace, raising the temperature to between 2,000 and 2,100 DEG C, keeping the temperature for 1 to 1.5 hours, and sintering the blank to obtain the silicon carbide carbonized complex phase ceramic sealing material.

The invention discloses a polymer self-lubrication thin layer composite shaft sleeve and the preparation method, which is rolled by a support skeleton made of metal mesh and a polymer composite. The formation of the metal mesh can be mesh-weaving forming, two-way stretching forming, punch forming or other forming modes; the shape of the mesh can be lozenge, hexagon, round or other shapes. The invention of shaft sleeve has excellent wear resistance, water corrosion resistance and good self-lubricating property and is especially suitable to be applied in the self-lubrication liner bushings of the automobile door hinge, footrest, joy stick and automatic door and window system.

The invention provides a composite material which comprises the following components in parts by weight: 90-110 parts of rubber, 1-15 parts of nanometer titanium dioxide, 2-20 parts of glass fiber, 5-30 parts of ultra-high molecular weight polyethylene, 2-20 parts of polytetrafluoroethylene, 5-40 parts of nanometer silicon carbide, 0.5-5 parts of peroxide initiator, 4-30 parts of cross-linking agent, 0-15 parts of molybdenum disulfide, 0-15 parts of graphite, 0-10 parts of zinc oxide, and 0-10 parts of potassium hexatitanate. The invention further provides a preparation method of the composite material. The nanometer titanium dioxide, the nanometer silicon carbide, the polytetrafluoroethylene and the ultra-high molecular weight polyethylene are added in the composite material and form a crystallographic and covalent cross-linking composite material with the rubber through a cross-linking effect of the peroxide initiator and the cross-linking agent.

The invention discloses a self-lubricating passivation solution and a hot galvanizing self-lubricating coating steel sheet coated thereby. The self-lubricating passivation solution is formed by modified solid lubricants, a film forming matter, a film forming additive, an accelerant, a pH modifier, an organic solvent and deionized water through compounding. The solid content after compounding is 15-25%, and the modified solid lubricants are modified nanometer MoS2 and modified nanometer teflon particles. According to the total weight of 1000g, the self-lubricating passivation solution comprises the following components: 10-20g/kg of modified nanometer MoS2, 10-20g/kg of modified nanometer teflon particles, 80-120g/kg of film forming matter, 10-30g/kg of film forming additive, 5-15g/kg of the accelerant and the balance of mixed solution of the organic solvent and the deionized water; and the pH value is adjusted to 3-6 by the pH modifier. The hot galvanizing self-lubricating coating steel sheet coated by the self-lubricating passivation solution comprises a hot galvanizing substrate and a self-lubricating coating attached to the hot galvanizing substrate. The self-lubricating passivation solution does not contain Cr<6+> and other environmentally harmful substances and has environmental protection property, corrosion resistance, wear extreme pressure resistance as well as coating and self-lubrication properties.

The invention relates to a Cu-Sn-Ti solder and a method for brazing Ti2AlC ceramics and Cu with the same, relating to a Cu-Sn-based solder and a method for brazing Ti2AlC ceramics and Cu with the same and realizing the high-strength and high-conductivity connection of the Ti2AlC ceramics and the Cu. The method comprises the following steps of: respectively grinding, polishing and clearing the Ti2AlC ceramics and the Cu and assembling the Ti2AlC ceramics, the Cu-Sn-Ti solder and the Cu into a brazing assembly unit; and then, brazing in a vacuum brazing furnace. The invention successfully realizes the connection between the Ti2AlC ceramics and the Cu and reaches the joint compression shearing strength of 40.53-187 MPa, the conductivity of 5.13*106-5.997*106 S/m, high joint strength and good electrical conductivity. The Ti2AlC ceramics and Cu connector is used for a carrier friction device and can solve the problems of high cost and shorter service life existing in the carrier friction device in traditional engineering applications.

The invention discloses a preparation method of a carbon fiber reinforced copper-based composite material. The preparation method comprises the following steps: I, weighing ingredients and carrying out ball-milling mixing for 3 hours, thereby obtaining a mixed material, and wrapping the surface of carbon fiber by a nickel layer, wherein the particle size of graphite powder is 50mu m, the graphite powder is subjected to chemical plating technical treatment, and a copper layer is plated on the surface of the graphite powder; II, pressing the mixed material prepared in the step I under the pressure of 700MPa, thereby obtaining a blank; III, performing secondary sintering on the blank prepared in the step II, thereby obtaining a sintered alloy block; and IV, performing thermal treatment on the alloy block treated in the step III, thereby obtaining the carbon fiber reinforced copper-based composite material. The carbon fiber reinforced copper-based composite material disclosed by the invention not only has excellent self-lubrication property, but also is particularly excellent in wearing resistance and mechanical property.

The invention provides steel bonded hard alloy which comprises the following components: 1.5wt%-6.0wt% of refractory carbide, 1.0wt%-3.0wt% of WS2, 1.0wt%-3.0wt% of C, 0.1wt%-0.5wt% of Mn, 10.0wt%-18.0wt% of Cr, 1.0wt%-5.0wt% of Mo, more than 0 but less than or equal to 1.8wt% of Si, more than 0 but less than or equal to 5.0wt% of Ni, and the balance of Fe. The invention also provides a preparation method for the steel bonded hard alloy. The raw materials, such as refractory carbide, tungsten disulfide, carbon and chromium are added in the steel bonded hard alloy, and a powder metallurgy sintering technology and a thermal treatment technology are adopted, so that the strength and hardness of the steel bonded hard alloy are increased, the abrasive resistance of the steel bonded hard alloy is increased and the service life of a stirring shaft abrasion-resisting sleeve prepared from the steel bonded hard alloy is prolonged.

The invention discloses coating equipment for tube-type PERC solar cells. The coating equipment comprises a wafer loading region, a furnace body, a gas cabinet, a vacuum system, a heating system, a control system and a graphite boat; the gas cabinet is provided with a first gas pipeline for introducing silane, a second gas pipeline for introducing ammonia, a third gas pipeline for introducing trimethylaluminum, a fourth gas pipeline for introducing laughing gas and a fifth gas pipeline for introducing methane; the graphite boat is used for loading or unloading a silicon wafer; before being used or after being coated many times, the graphite boat needs to be subjected to pretreatment comprising the steps: drying the graphite boat; and coating at least one layer of silicon carbide film on the surface of the dried graphite boat. Correspondingly, the invention further discloses a coating method for tube-type PERC solar cells. By using the coating equipment and method, the pretreatment step of the graphite boat is simplified, the consumption of the silicon wafer is reduced, the silicon wafer is prevented from being scratched, and the EL yield of the cells is increased.

The invention belongs to the technical field of fine chemical engineering polymer materials, and specifically relates to nano-graphene loaded wax liquor, and a preparation method and a use thereof. The wax liquor is a wax dispersion which is formed by loading ultrafine nano-graphene particles having the particle size in the range from 20 to 40 nm on wax particles having the particle size in the range from 200 to 800 nm; and the total solid content of the wax liquor is 15-25%. The preparation method provided by the invention is used for successfully solving the dispersion and aggregation problems of graphene while being used for a paint or an ink body; and the nano-graphene loaded wax liquor prepared by the preparation method is used for paint, ink or leather finishing, and has the effects of rub resistance, static resistance and electromagnetic wave blocking.

The invention discloses a cutting tool with micro textures and gradient coatings as well as a preparation method of the cutting tool. The base material of the cutting tool is high-speed steel, hard alloy or ceramic. Firstly, a laser-induced plasma technology is used to form micro textures of different patterns and sizes on the front and back surfaces of the cutting tool; and a method of multi-arcion plating and medium-frequency magnetron sputtering co-deposition is used to prepare Zr+ZrN transition layers, nano laminated layers consisting of alternating ZrVCN+TiSiNbC hard coatings and a WBSesoft coating on the surfaces of the cutting tool. The cutting tool has the advantages of the micro textures, the hard coatings, the soft coating, the nano layers and the laminated structure, and thushas high hardness and good self-lubricating property. During dry cutting, effective continuous lubricating films can be formed on the surfaces of the cutting tool, and the micro textures on the surfaces can perform the functions of reducing friction and collecting wear debris; and the nano laminated coating layers increase the binding force between the coating layers and reduce the internal stressof the coating layers. The cutting tool can be widely used in dry cutting and the cutting of difficult-to-machine materials.

The invention discloses a bearing retainer material and a preparation method thereof. The material is prepared from the following raw materials in percentage by weight: 2 to 5 percent of molybdenium disulfide, 8 to 12 percent of polyimide, 9 to 15 percent of polybenzoate, the balance of polytetrafluoroethylene. The preparation method comprises the following steps of: weighting the raw materials; mixing the raw materials; grinding the mixture; loading the mixture into a mould; pressurizing to prepare a blank; sintering the blank; and processing the blank into a finished product. The retainer material has the advantages of high temperature resistance, low temperature resistance, dimension stability, small erosion to metal and rubbed surfaces and good abrasion resistance. A retainer made of the bearing retainer material can be used under harsh conditions of no magnetism, ambient temperature changed between -19 and +55 DEG C, and rotation speed up to 7,200r/min so as to improve the performance of bearings.

The invention provides a nylon composite material special for an electric wire and cable jacket, which is prepared from the following components by mass percent: 86-100% of nylon 6, 0.1-2.0% of main antioxygen, 0.1-2.0% of auxiliary antioxygen, 0.1-2.0% of lubricant release agent, 0.1-2.0% of light stabilizer, 0.1-2.0% of lubricant, 0.1-2.0% of nucleating agent and 0.3-2.0% of tackifier, wherein the main antioxygen is a hindered phenol antioxygen, the auxiliary antioxygen is thiodi-propionic acid diester or phosphite ester, the lubricant release agent is calcium stearate, the light stabilizer is a hindered amine light stabilizer, the lubricant is ethylene double hard ester amide (EBS), silicone powder or a compositor of the ethylene double hard ester amide (EBS) and silicone powder, the nucleating agent is nano talcum powder, and the tackifier is nylon 6 containing reactive groups. The nylon composite material has the advantanges of simple formula and cheap, easily available components and low cost, and the electric wire and cable jacket prepared from the nylon composite material can prevent white ants and mousse, has abrasion resistance and corrosion resistance, is durable in use and is non-toxic and environment-friendly.

The invention discloses a surface texture of an indium-iron grid-shaped spherical composite microcrystal composite layer. A surface material layer is arranged on a part and mainly comprises larger indium-iron composite spherical microcrystal units of which the indium content exceeds 50% (Wt%) and the total content of indium and iron exceeds 55% (Wt%), each larger indium-iron composite spherical microcrystal unit is formed by close connection of at least four spherical crystal grains or nearly-spherical crystal grains, the larger indium-iron composite spherical microcrystal units are distributed regularly to form a grid, multiple single crystal grains or smaller indium-iron microcrystal units are closely distributed in the grid, each smaller indium-iron microcrystal unit is formed by close connection of at least two spherical crystal grains or nearly-spherical crystal grains, and the surface material layer and a base body material of the part are integrated to form the indium-iron grid-shaped spherical composite microcrystal composite layer; then a surface texture is machined on the part surface provided with the indium-iron grid-shaped spherical composite microcrystal composite layer and consists of multiple surface texture units, and the surface texture of the indium-iron grid-shaped spherical composite microcrystal composite layer is formed.

The invention discloses a solid lubricating composite material and a manufacturing method thereof. Raw materials for the solid lubricating composite material comprise carbon nano tube, boron oxide and polytetrafluoroethylene. The manufacturing method comprises the following steps: grinding the carbon nano tube in a ball mill to form sectional structures, adding ethanol and surface dispersant into the carbon nano substances of the sectional structures, and treating the mixture by ultrasonic wave to obtain carbon nano liquid; taking boron oxide powder, polytetrafluoroethylene powder and the carbon nano liquid in percentage by weight, and mixing the three substances and stirring the mixture at a high speed to disperse the carbon nano liquid into the boron oxide and polytetrafluoroethylene powder so as to obtain a mixture; and die-pressing and molding the mixture, and demoulding the mixture to obtain the finished product solid lubricating composite material. The solid lubricating composite material prepared from the combination of the carbon nano tube and the polytetrafluoroethylene with self-lubricating property greatly improves the technical indexes such as low friction coefficient, self-lubricating property, abrasion resistance and the like, can conduct heat and electricity and eliminate static electricity produced by friction, and can be continuously produced in batch with lower cost.

The invention discloses a basalt fiber filled ultrahigh molecular weight polyethylene composite material and a preparation method thereof, and belongs to a polymer composite material and a preparation method thereof. The material consists of the following components in percentage by mass: 65 to 95 percent of ultrahigh molecular weight polyethylene, 5 to 35 percent of basalt fibers and 0 to 2 percent of coupling agent. The preparation method comprises the following steps of: mixing the ultrahigh molecular weight polyethylene, the basalt fibers and the coupling agent to form a uniform mixture; and performing hot press molding, namely preserving the heat for 1 to 2 hours at the temperature of between 180 and 220 DEG C, pressing the mixture for 20 to 60 minutes under the pressure of 10 to 30MPa, and finally cooling the pressured mixture to room temperature to prepare the basalt fiber filled ultrahigh molecular weight polyethylene composite material. The modified material has good abrasionresistance and self-lubricating performance and high compressive strength, hardness and creep deformation resistance.

The invention discloses a self-lubricating treating agent composition which contains water, colloidal silicon dioxide, sodium silicate, lubricant, inorganic inhibitor, silane coupling agent and organic resin. The invention also discloses a hot aluminum/zinc-plated sheet which comprises a hot aluminum/zinc-plated sheet substrate and a coating attached to the surface of the substrate, wherein the coating is formed by the self-lubricating treating agent composition. The invention the invention also discloses a preparation method of the hot aluminum/zinc-plated sheet, which comprises the following steps: preparing the self-lubricating treating agent composition into a coating solution, coating the coating solution on the hot aluminum/zinc-plated sheet substrate, and curing. The coating formed by curing the self-lubricating treating agent composition has favorable corrosion resistance, heat resistance, water resistance and adsorptivity, and has especially excellent fingerprint resistance and self-lubricating property.