67results about How to "Improve friction and wear resistance" patented technology

The invention discloses a self-lubricating type epoxy resin material and a preparation method thereof, belonging to the polymer material field. The self-lubricating type epoxy resin material comprises the following components in weight percentage: 60 to 80 percent of epoxy resin, 0.5 to 25 percent of lubricating oil microcapsules and 15 to 35 percent of curing agents. The preparation method for the self-lubricating type epoxy resin material comprises the following steps of well mixing the lubricating oil microcapsules, the epoxy resin with the curing agents and casting rapidly when to-be-mixed matter has gel phenomena, so as to obtain the self-lubricating type epoxy resin material. The invention also provides a lubricating oil microcapsule needed in the preparation of the epoxy resin material and a preparation method for the lubricating oil microcapsule. A technical proposal provided by the invention adds the lubricating oil microcapsules to the epoxy resin so as to prepare the epoxy resin compound material, which can remarkably improve the wear reducing-resisting performance of the epoxy resin material and has broad application prospects.

The invention relates to a polyetheretherketone-base composite, a preparing method thereof and application thereof in friction reduction and wear resistance and belongs to the technical field of polymer composites. The polyetheretherketone-base composite, by 100% weight, 65% to 87% of polyetheretherketone, 10% to 30% of polyetherimide-coated carbon fiber, and 3% to 5% of coupler-modified titanium dioxide. In order to optimize the dispersity of micrometer chopped carbon fiber, polyetherimide which is well compatible with the polyetheretherketone and resistant to high temperature is used to coat the carbon fiber; the nano titanium dioxide is subjected to coupler inarching to reduce its agglomeration degree. Compared with fillers subjected to no treatment, the carbon fiber has the advantages such as uniform dispersity in composites and high interfacial action with matrixes. By adding the coated carbon fiber and the coupler-modified titanium dioxide, the friction and wear performance of the polyetheretherketone-base composite can be effectively improved, and the application in the friction-reducing wear-resistant environments is satisfied.

The invention provides a preparation method of a graphene/carbon nano tubes reinforced aluminum oxide ceramic coating. The preparation method includes the following steps: adding a less amount of graphene and processed carbon nano tubes to aluminum oxide to obtain a composite ceramic coating, and brush-coating a substrate with the coating, wherein slurry is composed of Al2O3 powder, graphene powder, the processed carbon nano tubes, and an adhesive. The processed carbon nano tubes are dried and ground, and then are subjected to ball milling with the graphene and Al2O3 for 6-8 h according to the ratio; the mass percentage of nano material is not more than 0.4%; the mixed aggregate is fully stirred with the adhesive according to mass ratio of 1:0.8 to obtain a mixture; the mixture is naturally dried for 2 h at a ventilated and shade place, and is gradiently heated at 50-300 DEG C for 5 h to produce the aluminum oxide composite ceramic coating. Compared with a common method of processing ceramic coatings, the method is simpler in equipment and technology and has high adaptability. The ceramic coating has good dispersibility and high binding strength, and is anti-wear and anti-corrosion.

The invention provides a special-shaped micro stepped bearing. The special-shaped micro stepped bearing comprises a static flat plate and a moving flat plate which are paired. The static flat plate is provided with a stepped surface. The convex surface of the static flat plate is coated with an oleophylic coating. The concave surface of the static flat plate is coated with an oilphobic coating. The motion direction of the moving flat plate is that the convex surface of the static flat plate points to the concave surface of the static flat plate. A clearance between the paired static flat plate and moving flat plate is full of lubricating oil. The clearance between working surfaces of the paired static flat plate and moving flat plate is in a nanometer scale. The special-shaped micro stepped bearing is formed by the paired static flat plate and moving flat plate. The special-shaped micro stepped bearing is suitable for occasions where surface clearances of bearing inlet areas are smaller than surface clearances of bearing outlet areas, and a traditional stepped bearing cannot be suitable for the occasions. The bearing is simple in structure, easy to manufacture and low in cost, has certain bearing capacity, is provided with a good lubricating oil film and can achieve good antifriction and wear-resisting effects.

The invention discloses a modified heat-resistant plastic which is prepared from a polyvinyl chloride resin, an acrylic resin, aluminum powder, modified glass fibers, calcium stearate, a dispersing agent, a heat stabilizer and a plasticizer. In order to overcome the defects in the prior art, a special method is adopted to modify the glass fibers, thereby enhancing the mechanical properties of the polyvinyl chloride plastic, improving the anti-friction and wear-resistant properties, and enhancing the weather resistance; the aluminum powder and calcium stearate subjected to high-temperature treatment are adopted to further enhance the heat resistance; and the production technique is simple and low in cost, and the prepared plastic has excellent heat stability.

The invention discloses a self-lubrication composite material of polyimide, which is composited and padded with carbon fibers, a solid lubricant and nanometer particles. The self-lubrication composite material has the characteristics of high mechanical strength, small friction coefficient, low wear rate and the like. The self-lubrication composite material can be processed into slip sheets, bearings and the like, the anti-friction and wear resisting capabilities of the material are improved, and the service life of the material is prolonged.

The invention belongs to the field of mechanically manufactured metal cutting tools, and particularly relates to a TiCrN/MoS2 multi-element anti-wear lubricating coating tool and a preparation process thereof. A tool base body comprises high-speed steel, hard alloy, ceramics, diamond or cubic boron nitride, a coating is of a multi-layer structure, and a Ti transition layer, a Ti/Cr transition layer and a TiCrN and MoS2 compounded coating are sequentially arranged between the base body and the surface of the coating. According to the coating tool, the advantages of a TiCrN multi-element hard coating and a MoS2 lubricating coating are synthesized, high hardness is achieved, a lubricating function is achieved, the good lubricating performance of the coating can be kept in the whole life period, and the cutting performance of the coating tool can be remarkably improved.

The invention belongs to the field of mechanically manufactured metal cutting tools and particularly relates to a ZrTiN/MoS2 composite antifriction wear-resistant coated tool and a preparation process thereof. A base of the tool is made of high-speed steel or hard alloy or ceramic or cubic boron nitride. A Ti transition layer, a Ti/Zr transition layer and a ZrTiN/MoS2 composite coating are sequentially arranged from the base to the coated surface. By controlling the content of MoS2 in a ZrTiN multi-element hard coating, the composite coating has high hardness of the hard coating and a low friction coefficient of MoS2, and the coating can maintain good lubricating performance in the whole life cycle, so that the comprehensive performance of the coated tool is remarkably improved.

The invention relates to a method for improving wear resistance of a polymer material by composite filling. According to the method, first a polymer resin matrix, a cleaned micron-reinforcing material, and a solid lubricant are fully dried according to material drying parameters, and then according to different molding requirements of the polymer resin matrix, the cleaned micron-reinforcing material and the solid lubricant with different elastic moduli and hardness are simultaneously added into the polymer matrix with the help of corresponding equipment, and a composite material is prepared ora granular material is extruded. For the first time, a combination of reinforcing materials with different physical properties is used to jointly regulate tribology properties of a polymer, the process is simple, the cost is low, and production is easy. The prepared anti-friction and wear-resistant polymer composite material can be widely used in automobiles, aerospace, machinery manufacturing and other fields as important components of polymer sliding bearings, sealing rings, thrust washers and other moving mechanisms.

The invention discloses a preparation method of an Mo-V-C-N composite coating. The method comprises the steps that firstly, a substrate is treated; secondly, an Mo target, a V arc target and the substrate are placed, and a vacuum chamber is vacuumized and heated; thirdly, the substrate is etched; fourthly, an Mo priming layer is formed through deposition; fifthly, an Mo-V buffer layer is formed through deposition; sixthly, an Mo-V-N transition layer is formed through deposition; seventhly, an Mo-V-C-N body layer is formed through deposition; eighthly, vacuum annealing treatment is performed; and ninthly, the substrate provided with the Mo-V-C-N composite coating on the surface is obtained through cooling. According to the preparation method, through layered arrangement of the Mo-V-C-N composite coating, good component transition is formed, good combination with the substrate is ensured, and cracking and stripping of the Mo-V-C-N composite coating are avoided; and the prepared Mo-V-C-Ncomposite coating is uniform and dense in structure, high in hardness, good in toughness, low in friction coefficient and good in wear resistance, has a lubricating effect under both high temperatureand low temperature and is suitable for serving as a space self-lubricating layer.

A novel polyoxymethylene resin composition is provided, which may be availably used as engineered plastics in various industrial fields and products, such as vehicle parts. The poly resin includes polyoxymethylene, aramide fibers, and thermoplastic polyurethane, thereby providing the novel composition of polyoxymethylene resin and improving various physical properties thereof, such as thermal stability.

The invention provides an attapulgite- titanium dioxide modified ultra-high molecular weight polyethylene composite material as well as a preparation method and application thereof, and belongs to thetechnical field of solid lubricating materials. According to the invention, attapulgite- titanium dioxide is used as a filler in ultrahigh molecular weight polyethylene, titanium dioxide particles have high surface energy, hard high-roughness particles can be formed after the titanium dioxide particles are loaded on attapulgite, and after attapulgite-titanium dioxide serving as filler is combinedwith ultrahigh molecular weight polyethylene, a better bearing effect can be achieved in the friction process, and abrasion of the material can be prevented; and meanwhile, the attapulgite-titanium dioxide is added, so that the heat resistance of an ultrahigh molecular weight polyethylene matrix can be improved, the composite material is not prone to deformation under the condition that frictionheat is concentrated, the deformation degree of the material is reduced to a certain extent, correspondingly, adhesive wear is also reduced to a certain extent, and the anti-friction and wear-resisting properties of the material are further improved.

The invention provides a fire-resistant hydraulic fluid composition, which is characterized by being prepared from a raw material comprising 5 to 8 percent by mass of phosphate rare earth compound. The prepared fire-resistant hydraulic fluid composition can obviously improve frictional wear resistance and rust protection of hydraulic fluid; meanwhile, both swelling and shrinkage of the prepared fire-resistant hydraulic fluid composition for sealing materials, such as chemigum, accord with related standard requirements.

The invention provides a water-lubricated bearing composite material and a preparation method thereof, belonging to the technical field of composite materials. The water-lubricated bearing composite material comprises the following steps: mixing toluene diisocynate and polybutylene glycol, and carrying out an addition reaction to obtain a PU prepolymer; mixing the PU prepolymer, epoxy resin and a first organic solvent to obtain a first mixture; mixing nitrile rubber with a second organic solvent to obtain a nitrile rubber solution; mixing the first mixture, a nitrile rubber solution, an additive, a vulcanizing aid, an anti-aging agent D, a vulcanizing agent and a curing agent, and conducting drying to obtain a premix; and sequentially subjecting the premix to mixing, vulcanization and curing forming so as to obtain the water-lubricated bearing composite material. According to the invention, PU and EP are introduced into the NBR material at the same time for the first time; the introduction of PU can enhance the elasticity and damping shock absorption performance of the material and reduce the influence and loss caused by friction vibration; and the introduction of EP can greatly improve the antifriction wear resistance of the material.

The invention discloses a silt environment resistant long-life water-lubricated bearing composite material. The composite material is composed of a rubber matrix, a reinforcement body, a solid lubricant, an inorganic nanofiller and an organic polymer filler. The composite material has the characteristics of excellent silt inclusiveness, high mechanical strength, small friction coefficient, low wear rate and the like, and has good silt containing water lubrication performance, through the synergistic effect of the solid lubricant, the inorganic nanofiller and the organic polymer filler, the friction coefficient of a butadiene-acrylonitrile rubber water-lubricated bearing material can be effectively reduced, the antifriction and antiwear ability of the bearing material can be improved, and the service life of the material is prolonged. The material can form seal rings, bearings and other materials for use, especially in the field of pump shafts, marine tail shafts and other water-lubricated bearings under high silt content water quality working conditions.

The invention discloses a preparation method of a silver/hexagonal boron nitride nano hybrid material modified epoxy resin self-lubricating composite coating layer. The method mainly comprises the following steps: firstly, preparing hexagonal boron nitride nanosheets through simple hydrothermal stripping under mild reaction conditions; preparing a silver/hexagonal boron nitride nano hybrid material through a hydrothermal method, adding the silver/hexagonal boron nitride nano hybrid material into epoxy resin, a curing agent and an organic solvent according to a certain ratio, and carrying out mechanical stirring and ultrasonic dispersion to obtain a mixed solution; and finally, spraying the mixed solution on a base material, naturally drying, and curing and molding in a vacuum drying oven to obtain the epoxy resin self-lubricating composite coating layer. The prepared composite coating layer shows a low friction coefficient and high wear resistance, reaction conditions are mild, the preparation method is easy to operate, a large-area anti-friction and wear-resistant surface is easy to prepare, and the composite coating is suitable for large-scale production.

The invention relates to the technical field of screen production, in particular to a preparation method of a polyformaldehyde self-lubricating sieve plate. Raw material source is wide, and the preparation method is simple and convenient. Polyformaldehyde is modified by taking microcapsule filler and butadiene rubber latex as raw materials, and the self-lubricating property and the toughness of the polyformaldehyde are improved. The prepared polyformaldehyde self-lubricating sieve plate has the advantages of antifriction, self-lubrication, fatigue resistance, stable size and the like. The sieve plate is simple to process and form, long in service life, free of blockage of holes in the surface of the sieve plate, high in sieving efficiency, capable of effectively preventing adhesion of wetfine particles, and suitable for sieving and grading of the wet fine particles. A sintering compression molding process is adopted, and the sieve plate is accurate in aperture, high in sieving quality, high in strength, impact-resistant, wear-resistant, high in tensile strength and high in bearing capacity.

The invention discloses a light high-conductivity slip ring and a preparation method. the light high-conductivity slip ring comprises a base material and a coating covering the base material; the base material comprises, by mass, 5-10% of graphene and 90-95% of titanium hydride; and the coating comprises, by mass, 0.5-1.3% of lanthanum oxide, 1-2% of tungsten sulfide and 7-12% of carbon nanotubes, and the balance is silver. The coating is cladded on the surface of the base material made of powder metallurgy through an ultra-high-speed laser cladding technology to form the coating of the slip ring. According to the conductive slip ring, light weight is achieved, the hardness and the arc corrosion resistance of the slip ring coating are enhanced, the antifriction and wear-resistant capacity of the working face of the slip ring is improved, the current-carrying performance is also improved compared with that of pure silver, the process is simple, and the manufacturing cost of the conductive slip ring for spaceflight is reduced.