4 solid lubricant coating of adhesive application <br> <br> With the development of science and technology, bonding solid lubricant coating has been widely used in modern industry and has achieved great economic and social benefits. The successful application of bonded solid lubricating coatings is inseparable from their unique properties. The main applications of bonded solid lubricating coatings are described below in terms of operating conditions. Previous Next Luan Jinyu Metal Printing & Can Co., Ltd. , http://www.chmoreusage.com
4.1 Application in vacuum machine Lubricating grease will evaporate and dry under vacuum conditions and will not be used as a lubricating material for vacuum machinery. In this case, it is considered to choose a solid lubricating coating. Although the organically bonded solid lubricating coating releases organic vapor in a vacuum, its release rate is much lower than that of the grease, and generally does not affect its performance as a lubricating material. In the case of avoiding contamination of tight vacuum machinery by organic steam, it may be considered to select an inorganic bonded solid lubricating coating.
Studies have shown that the bonded solid lubricating coating containing MoS2 has excellent tribological properties in vacuum. Under the same conditions, the friction coefficient is about 1/3 of that in the atmosphere, and the wear life ratio is in the atmosphere. It is several times or even dozens of times longer and is the first choice for many bonded solid lubricant coatings that can be used for vacuum mechanical lubrication. In addition, PTFE-containing bonded solid lubricant coatings also have good vacuum lubrication properties and are often used to solve lubrication problems in vacuum. Correspondingly, the graphite-containing bonded solid lubricating coating has a high friction coefficient and wear rate under vacuum conditions, and thus is not suitable as a lubricating material for vacuum machinery.
Bonded solid lubricant coatings have been widely used in space technology, such as antenna drive systems on satellites, solar panel windsurfing mechanisms, optical instrument drive mechanisms and temperature control mechanisms, star-and-arrow separation mechanisms, and satellite-mounted machinery. The use of bonded solid lubricant coating technology, especially in vacuum anti-cold welding, bonding solid lubricant coating is an important role that other lubricating materials can not replace. In recent years, the application of bonded solid lubricating coating technology in civil vacuum machinery has also increased rapidly.
4.2 Application under high and low temperature conditions
One of the characteristics of bonded solid lubricant coatings is their wide temperature range, from very low temperatures below -200 ° C to high temperatures close to 1000 ° C. For commonly used varieties, the epoxy resin bonding series is allowed to be used at temperatures ranging from -70 to 250 ° C, and the polyimide series is used at temperatures ranging from -70 to 380 ° C. Inorganic phosphates and silicates are bonded. The maximum allowable temperature for solid lubricant coatings is 700 °C. The bonded solid lubricating coating has no phase change in the applicable temperature range, and the friction coefficient is relatively stable, so it is widely used to solve the lubrication and anti-sticking problems of high temperature machinery which cannot be solved by lubricating grease.
At present, the application of bonded solid lubricating coatings under high and low temperature conditions is very common, such as high temperature sliding parts of various engines (including rocket engines), cylinders, piston rings, and other high temperature sliding parts on the aircraft, such as high pressure compressors. Several stages, afterburner systems and thrust reverse systems, cannons for long-range guns, metal hot-working molds, steel-making machinery, thermoelectric machinery, related components of the original energy-reactor, high-temperature ablation fasteners, etc.; typical at low temperatures Examples of applications include rocket-hydrogen-oxygen engine turbo pump gears and related sliding parts for superconducting equipment. The successful application of bonded solid lubricating film under high and low temperature conditions solves a series of special lubrication problems of high and low temperature machinery, which lays a material foundation for the technical progress of high and low temperature machinery and shows significant social and economic benefits.