6results about How to "Improve tribological performance" patented technology

The invention belongs to the technical field of brake friction materials and powder metallurgy, and discloses a preparation and regulation method for a three-dimensional latticed structure in a copper-based brake friction material. The copper-based brake friction material is mainly composed of copper-coated iron powder, molybdenum disulfide, crystalline flake graphite, silicon dioxide, superfine copper powder and other functional components. Wherein the three-dimensional latticed structure is constructed by superfine copper powder, and the comprehensive performance of the copper-based brake friction material is improved through multiple excellent performances such as high heat conduction performance and mechanical strength of the three-dimensional latticed structure; according to the invention, structural design and preparation are carried out on raw material powder by adopting a method of prefabricated particle preparation and particle bonding and coating, so that all functional components are uniformly distributed on the friction material, a three-dimensional latticed structure can be constructed, and the mechanical property and tribological property of the friction material are greatly improved; the copper-based brake friction material is high in mechanical performance, stable in friction coefficient, high in heat conduction performance, low in wear rate and excellent in performance under extreme working conditions.

The application discloses a 3D printing titanium alloy workpiece with a composite modified layer on the surface and a preparation method. The 3D printing titanium alloy workpiece has a composite modified layer on the surface, the composite modified layer comprises a first texture, a solid lubricating layer and a second texture, the texture is prepared by extrusion molding, the solid lubricating layer is prepared by powder laying and extrusion, the solid lubricating layer is located between the first texture and the second texture, and the second texture is located at the center position of the solid lubricating layer. According to the preparation method, the solid lubricant is filled and extruded quantitatively in the mode of "filling first and extruding later", and the texture is extruded at the same time, the preparation efficiency of the composite modified layer is improved, the synergistic effect of the texture and the solid lubricating layer is exerted, the friction and wear performance of the workpiece is improved, the wear in the process of contact between the workpiece and other workpieces is reduced, and the service life of the workpiece is prolonged.

The application discloses an environment-friendly eutectic solvent anti-friction and anti-wear additive and a preparation method and application thereof, and belongs to the field of lubricating additives.The application uses cetyltrimethylammonium chloride / cetyltrimethylammonium bromide and natural plant source thymol as raw materials, mixes them in a molar ratio of 1:1 to 1:3, stirs them at a constant temperature of 90 DEG C for 2 hours, and thus a sulfur-free and phosphorus-free transparent stable eutectic solvent is prepared without an organic solvent and a catalyst; the solvent is used as an anti-friction and anti-wear additive, is added into lithium-based lubricating grease in an addition amount of 0.5wt% to 2.0wt%, is uniformly dispersed through three-roll grinding, and thus high-performance modified lubricating grease suitable for severe working conditions is obtained.The raw materials are green and renewable, the preparation process is mild and simple, and the environment compatibility is excellent; a low addition amount can significantly reduce a friction coefficient and wear volume, a dense adsorption film is formed on a metal friction surface, and the application is particularly suitable for long-acting anti-friction and anti-wear lubrication under high-speed and boundary lubrication working conditions such as cotton picker picking spindles.

The application discloses a zirconia ceramic surface strong bonding force molybdenum disulfide-based coating and a preparation method and application thereof, and the coating is composed of a substrate surface modification layer, a Cr adhesive layer, a hard gradient transition layer and a molybdenum disulfide-based target layer, wherein the modification layer is formed by high-energy chromium ion implantation, and the hard gradient transition layer is composed of a chromium-doped amorphous carbon layer, a chromium and molybdenum co-doped amorphous carbon layer, a molybdenum-doped amorphous carbon layer and a molybdenum disulfide layer, that is, transition from the Cr metal layer to the MoS2, and the component detailed change is Cr / a-C, Cr / Mo / a-C, Mo / a-C, MoS2 / a-C and MoS2.The application can enhance the film-substrate bonding strength of the zirconia and the molybdenum disulfide-based coating, effectively improve the tribological performance of the zirconia ceramic, and provides technical support for realizing high performance and long service life of the zirconia friction pair.

This invention belongs to the field of clutch manufacturing technology and aims to solve the problem that the friction performance of existing heavy-duty clutches gradually decreases over time, thus affecting their transmission smoothness and shortening their service life. To this end, this invention provides a method for preparing a surface-textured clutch plate. The method includes: preparing a mixed powder comprising metal matrix powder, solid lubricant powder, reinforcing phase powder, and a forming agent, and mixing them uniformly in a predetermined ratio; loading the mixed powder into a mold for cold pressing to obtain a green blank with a predetermined geometric structure; sintering the green blank under a protective atmosphere with stepped heating; processing microtextures on the friction surface of the sintered part using an ultrasonic impact device; and cleaning the surface of the ultrasonically impacted workpiece. This invention can optimize the friction performance of the clutch, enabling it to maintain high friction characteristics for a long time and preventing a rapid reduction in the clutch's service life.

The invention discloses a wear-resistant coating for a bearing and a preparation method and application thereof.The wear-resistant coating at least comprises polyamide-imide resin powder containing hydrophobic groups, a lubricating phase and a modified reinforcing phase, and the modified reinforcing phase comprises a modified fibrous reinforcing phase and a modified powdery reinforcing phase; the modified fibrous reinforced phase is prepared by degumming, etching and treating a fibrous reinforced phase with a coupling agent, and the modified powdery reinforced phase is prepared by carrying out surface pretreatment and acidizing treatment on a powdery reinforced phase. Compared with a conventional polyamideimide resin wear-resistant material, under the combined action of the polyamideimide resin powder containing hydrophobic groups, the lubricating phase and the modified reinforcing phase, the coating has lower water absorption, better self-lubricating property and higher bearing capacity, and can be widely applied to manufacturing of bearings; not only can the use requirement of a high-humidity environment be met, but also mechanical faults can be obviously reduced, so that the service life of the bearing is longer.