There are many types of bonded solid lubricating coatings, but the basic components are composed of four parts as shown in Figure 1. The basic physical and chemical properties of the components and the interactions between the components (compatible matching characteristics, synergistic effects, etc.) Layer performance has a decisive and important impact. It is usually classified according to the curing characteristics, performance characteristics, solid lubricant type, binder type, etc. of the bonded solid lubricating coating. Figure 2 shows various classification methods, which are often used in practical applications. Used, but there are certain limitations. For example, the first two classification methods do not reflect the material properties of the coating, and the latter two classification methods cannot fully reflect the process and performance characteristics of the coating. The organic and inorganic bonded solid lubricating coatings are respectively introduced according to the binder type classification method, and the performance characteristics of the bonded solid lubricating coatings are briefly explained. 2.1 Organic Bonded Solid Lubrication Coating The organically bonded solid lubricant coating is a method of bonding the solid lubricant dispersed in the resin system to the surface of the friction member by utilizing the excellent adhesion ability of the organic resin to the surface of the substrate, usually It is necessary to add various additives such as a dispersant and an antioxidant. Commonly used organic resins include alkyd resins, polyurethanes, polyacrylates, epoxy resins, phenolic resins, silicone resins, polyimide resins and modified products thereof, aromatic heterocyclic polymers and other thermoplastic resins. In order to facilitate the coating process, organic solvent or water is generally used as a diluent in the organic bonded solid lubricating coating spray, but in recent years, solventless and powder sprayed organic bonded solid lubrication has been successfully developed. The coating is equally good for application. Previous Next Frequency Meter,Digital Frequency Meter,Frequency Meter Application,Frequency Meter Android Yuyao Gongyi Meter Co.,Ltd. , https://www.yycj.com
The organic bonded solid lubricating coating is one of the most widely used and widely used bonded solid lubricating coatings, and its variety and dosage account for more than 80% of the entire bonded solid lubricating coating, through different solid lubricants. A combination of resin binder systems can produce bonded solid lubricating coatings with different performance characteristics. The type of solid lubricant, the ratio of the amount of solid lubricant to the amount of organic binder, the cohesion of the coating and the adhesion of the coating to the substrate are all important factors influencing the performance of the organically bonded solid lubricating coating. An organic bonded solid lubricating coating containing a layered solid lubricant such as MoS2 or graphite has excellent load resistance and is suitable for use under medium and low speed and high load conditions, and an organic bonded solid lubricating coating containing low friction polymer such as PTFE. The layer has a long wear life and is suitable for use under medium-speed and low-load conditions. From the current situation, it is unrealistic to have a certain kind of bonded solid lubricating coating with various properties at the same time. Therefore, in actual use, the bonded solid lubricating coating with corresponding performance characteristics should be selected according to specific working conditions and requirements.
Due to the wide variety of organic resin binders that can be used as coating bonding components, and the emergence of new varieties, this provides an advantage for us to design new organic bonded solid lubricant coatings. In addition, special polymer design can be carried out for specific requirements, and binders with specific properties can be synthesized to meet the requirements under special working conditions. The biggest drawback of the organic bonded solid lubricating coating is that the organic resin as a bonding component is mostly limited in temperature resistance, and it is difficult to meet the requirements of higher temperature use. Even the high temperature resistant organic resin generally has a maximum use temperature. It does not exceed 400 ° C, and there are problems such as high vacuum gas output rate, atmospheric aging and low temperature brittleness. Most varieties cannot be used in a liquid oxygen environment.
2.2 Inorganic bonded solid lubricating coating Inorganic bonded solid lubricating coating refers to a bonded solid lubricating coating with inorganic salts such as silicate, phosphate, borate and ceramics, metals and the like as a bonding component. Compared with the organic bonded solid lubricating coating, its outstanding advantages are wide temperature range, low vacuum gas output rate, good compatibility with liquid oxygen, etc., but it has large brittleness, poor load resistance and tribological properties. Not as good as organic bonded solid lubricating coatings. Therefore, most inorganic bonded solid lubricating coatings have been limited to use under special working conditions (such as liquid oxygen environment, special high temperature, satellite machinery that avoids organic vapor pollution, etc.).