36results about How to "Good wear resistance and antifriction performance" patented technology

The invention discloses a method for preparing a NiCrBSi-TiN gradient composite coating abrasion-resistant belt on the surface of a drill rod joint. The method includes the following steps that (1) surface pre-treatment of a base material is performed; (2) a gradient coating is prepared, specifically, mixed powder of each layer is prepared according to the proportions of NiCrBSi powder and Ti powder in each layer in a composite gradient coating shown as follows, the mixed powder of each layer is put in a grinding miller to be mixed, the powder is dried for 0.7-1.2 hours at the temperature of 100 DEG C to 110 DEG C before spraying, and then plasma spraying of each layer is performed in sequence; and (3) induction remelting aftertreatment of the coating is performed, specifically, the drill rod joint is coated with a high-temperature antioxidant coating material with the thickness being 0.2-0.3 mm after being subjected to composite gradient spraying, and then induction melting treatment is performed through high-frequency induction heating equipment. According to the method, the process operation is simple, the feasibility is high, the abrasion resistance is remarkably improved, and abrasion to the abrasion-resistant material is small.

The invention belongs to the field of high polymer composites and particularly relates to a nanoparticle / graphene oxide composite modified high polymer material and a preparation method thereof. The composite is prepared from nanoparticle / graphene oxide composite particles and a macromolecular polymer matrix, wherein the nanoparticle / graphene oxide composite particles are synthesized with an electrostatic self-assembly method, that is, an amino modified nanoparticle dispersion liquid is ionized to have positive charges while graphene oxide contains a large quantity of carboxyls and hydroxyls and is ionized to have negative charges, particles with positive and negative charges are sufficiently contacted, and electrostatically self-assembled nanoparticle and graphene oxide composite particles are obtained. The prepared nanoparticle / graphene oxide composite modified high polymer material has excellent mechanical and tribological performance, is simple and efficient to prepare and has goodapplication prospects in automobiles, aerospace, electronic and electrical engineering, machinery, weapons and other fields.

The invention discloses a method for preparing a TiWN / MoS2 composite film, which comprises the following steps of: with a Ti target, a W target and a MoS2 target as raw materials, under the protection of nitrogen and / or argon, sequentially sputtering on a base material after surface finishing and cleaning with a magnetron sputtering method to obtain a TiWN film and a MoS2 film, thereby obtaining a TiWN / MoS2 composite film, wherein the TiWN film is a hard film, and the MoS2 film is a soft film for protecting the hard film. The composite film has good properties of antifriction and wear resistance and can be used as a protective coating of a machinery part to play roles in increasing the mechanical property and prolonging the service life. Moreover, the requirements for production conditions are low, the process is simple, the cost is low, the yield is high, and the composite film is suitable for large-scale industrial production.

The invention discloses a method for preparing a compound powder used for an abrasion-resistant self-lubricating coating, belonging to the technical field of material preparation and comprising the following steps of: adopting a chemical plating process to coat Ag on the surface of a WC-12Co powder; putting the powder to hot alkali liquor to remove oil; carrying out sensitizing treatment on the powder by an SnCl2 solution; carrying out activating treatment on the powder by using a PdCl2 solution; adding the powder to a reducing solution; then adding a silver-ammonia solution; stirring and mixing; regulating the pH value of the mixed solution by using ammonia water; taking out the powder after 5-60min; and washing clean with distilled water; and drying into the powder to obtain the compound powder used for the abrasion-resistant self-lubricating coating. The amount of Ag coated on the surface of the powder is changed through regulating the concentration of the silver-ammonia solution, the concentration of the reducing solution and the deposition time. The Ag / WC-12Co compound powder the Ag layer of which is even and compact can be prepared by utilizing the invention, thereby enabling the lubricating phase distribution in the prepared coating to be even and the abrasion resistance and anti-friction property to be excellent.

The invention provides a method for preparing a nickel phosphorus / expanded graphite-polyester resin / polytetrafluoroethylene composite material. The method comprises the following steps: firstly, preparing expanded graphite of which the surface is coated by a chemical nickel phosphorus cladding layer, secondly, filling a foamed nickel support with the expanded graphite, preparing an unsaturated polyester resin / polytetrafluoroethylene mixed solution, sufficiently filling pores of foamed nickel filled with the expanded graphite with the unsaturated polyester resin / polytetrafluoroethylene mixed solution, and finally conducting room-temperature polymerization and later polishing and grinding, so as to obtain the nickel phosphorus / expanded graphite-polyester resin / polytetrafluoroethylene composite material. In the preparation process of the nickel phosphorus / expanded graphite-polyester resin / polytetrafluoroethylene composite material, sufficient contact of the polyester resin and the expanded graphite of which the surface is coated by the nickel phosphorus cladding layer with polytetrafluoroethylene is ensured, so aggregation of the polytetrafluoroethylene and the expanded graphite is effectively avoided, furthermore, the wearing resistance of the polytetrafluoroethylene is greatly improved, the prepared composite material is small in friction coefficient, high in hardness, high in pressure resistance and good in wearing resistance, and has wide application prospects under high-frequency friction working conditions.

A pulse electrodeposited Ni-Co-P / HBN composite coating and a preparation method thereof, which uses a metal material as a substrate, first pre-treats the surface of the substrate, and then mixes it with nickel sulfate, cobalt chloride, sodium hypophosphite, and citric acid , trisodium citrate, boric acid, and polyvinyl alcohol as the main components, and hexagonal boron nitride HBN powder as the dispersed phase of the composite plating solution. The HBN particles are surface-modified and dispersed with surfactants and ultrasonic vibrations. Through reasonable settings Pulse electrodeposition parameters, fully stirred to make HBN particles evenly dispersed in the plating solution, HBN particles and matrix metal nickel-cobalt-phosphorus co-deposition and heat treatment under the state of applying pulse current to obtain corrosion-resistant, wear-resistant and anti-friction pulse electrodeposited Ni- Co-P / HBN composite coating; it overcomes the shortcomings of existing composite coatings such as relatively single components, coarse coating grains, low interface bonding strength with the substrate, and unsatisfactory comprehensive performance of corrosion resistance, wear resistance and friction reduction; it is suitable for use as Wear-resistant and anti-friction and corrosion-resistant surface coatings for frictional motion parts in machinery, metallurgy, and chemical industries.

The invention belongs to the technical field of self-lubricating materials, and relates to a preparation method of a molybdenum disulfide-nickel phosphorus-polytetrafluoroethylene composite material,and the method comprises the following steps: S1, performing plasma treatment on polytetrafluoroethylene powder, and after irradiation for 60-120 seconds, putting the polytetrafluoroethylene powder for standing for 15-30 minutes in air; S2, performing sensitization and activation treatment on the polytetrafluoroethylene powder, to be more specific, after wetting of the polytetrafluoroethylene powder treated by plasma with absolute ethanol, respectively performing sensitization and activation on the polytetrafluoroethylene powder; S3, preparing a nickel phosphorus-polytetrafluoroethylene composite and performing amination treatment, to be more specific, a chemical nickel phosphorus-plating solution is prepared for plating the sensitized and activated polytetrafluoroethylene powder to obtainnickel phosphorus-polytetrafluoroethylene composite powder, and the obtained nickel phosphorus-polytetrafluoroethylene composite powder is aminated; and S4, preparing the molybdenum disulfide-nickelphosphorus-polytetrafluoroethylene composite material, to be more specific, first, molybdenum disulfide-nickel phosphorus-polytetrafluoroethylene composite material powder is prepared, and the molybdenum disulfide-nickel phosphorus-polytetrafluoroethylene composite material powder is molded to obtain the wear resistant and antifriction molybdenum disulfide-nickel phosphorus-polytetrafluoroethylenecomposite material.

The invention belongs to the technical field of self-lubricating materials, and relates to a preparation method of a molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material, and the method comprises the following steps: S1, performing plasma treatment on polytetrafluoroethylene powder, and after irradiation for 60-120 seconds, putting the polytetrafluoroethylene powder for standing for 15-30 minutes in air; S2, performing pretreatment on graphite powder, S3, performing sensitization and activation treatment on the polytetrafluoroethylene powder, to be more specific, after wetting of the polytetrafluoroethylene powder treated by plasma with absolute ethanol, respectively performing sensitization and activation on the polytetrafluoroethylene powder; S4, preparing graphite-nickel phosphorus-polytetrafluoroethylene composite powder, S5, preparing graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder, and S6, preparing the molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material, to be more specific, first, molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder is prepared, and the molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder is molded to obtain the wear resistant andantifriction molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material.

The invention relates to a wear-resistant delta-TaN film, and a preparation method and application thereof, and belongs to the technical field of wear-resistant material design and preparation. A texture coefficient I(200) / [I(200) + I(111)] of the delta-TaN film is 0.2 to 0.8; the crystal structure of the film is delta-TaN of an NaCl crystal form. In the film, an atomic ratio of Ta / N is about 0.72 to 1.33. The preparation method comprises the following steps: using radio frequency reactive magnetron sputtering, using nitrogen and argon as working gases, using a tantalum target as a tantalumsource, and fixing a flow ratio of nitrogen and argon; adjusting a grain texture coefficient of the film by changing working pressure and / or tantalum target power. The application of the resulting filmincludes use as a cutting device, a diffusion impervious layer for electronic packaging, and the like. The invention opens up a new method for controlling the grain texture coefficient of the film; an obtained product is excellent in performance and is convenient for high-precision and large-scale generation and application.

The invention relates to an electro-deposition composite plating method of oil-sleeve collar-joint screw-threads and a plating solution thereof. The method includes the following steps: a composite plating solution comprises surfactant mixed solution and alkalescence plating solution with the usage ratio of 10g to 60g:1L, wherein the surfactant mixed solution comprises fatty alcohol-polyxyethylene ether and polytetrafluoroethylene latex with the weight ratio of 1: 20 to 1: 50. Self-lubricating composite plating obtained on the screw surface of the nickel-base alloy oil-sleeve collar-joint by the method and the plating solution of the invention has good wear resistance and antifriction performance and can improve the pick resistance of the oil-sleeve collar-joint.

The invention discloses a powder metallurgy circular spline which adopts less machining / free-of-machining, can be self-lubricated in the working process and is used for a harmonic reducer, and a preparation method of the powder metallurgy circular spline. The preparation method adopts a powder metallurgy method and comprises the procedures of preparation of powder with high composition uniformity,pressing, sintering, aftertreatment and the like. The powder metallurgy circular spline prepared from the preparation method has the advantages of being uniform in composition, good in abrasion resistance and anti-friction property, low in noise, long in life, less in machining / free of machining, low in cost and the like, and can replace a circular spline currently machined and prepared from materials such as steel and cast iron.

The invention relates to a preparation method of a wear-resistant anti-friction coating with a highly dispersed and distributed lubricating phase. According to the preparation method, powder such as Ni-C, AlSi-polyphenyl ester and NiCr-BN-MoS2 which have the self-lubricating property is used as a raw material, and an internal powder feeding high-energy plasma spraying method is adopted for formingthe wear-resistant anti-friction coating on a metal substrate. According to the preparation method, through reasonable thermal spraying process parameters, the spraying technological process is strictly controlled, the porosity of the coating is reduced, the hardness and the bonding force are improved, the comprehensive mechanical properties are greatly improved, the wear-resisting anti-frictionperformance is obviously optimized, and the work service life of turbomachinery is effectively prolonged.