The importance of self-lubricating coatings

Wear caused by friction is the main factor for the failure of various mechanical parts, and lubrication is the main measure to reduce friction and wear. Lubrication can be divided into fluid lubrication and solid lubrication.

The applicable temperature range of fluid lubrication is limited. Under high temperature conditions, fluid lubrication performance will not only fall, but also cause environmental pollution. Solid lubrication has obvious advantages in these aspects.

Sulfide is an important one in solid lubrication materials, such as FeS, WS2, MoS2, etc., has a hexagonal crystal layered structure, the separation force between molecular layers is weak, so the interface molecular layer easily slides to form a good lubrication performance.

Applying a layer of solid lubricant film on the surface of steel materials can have a good lubrication effect on the friction surface. During the friction process, the solid lubricant film coated on the surface of the substrate is easily transferred to the appearance of the dual material.

The transfer film is formed, so that friction can occur between the transfer film and the lubricating film, which reduces the friction coefficient, plays an effective maintenance role, and reduces the wear of the base metal.

With the requirements of green manufacturing for dry cutting processing technology, the requirements for the comprehensive performance of tools for dry cutting are getting higher and higher. After solid self-lubricating coating technology,

Applying a layer of self-lubricating material to the surface of the tool to complete the self-lubrication of the tool and improve the friction and lubrication performance of the tool are the key technologies to complete the dry cutting of the tool.

The sulfide solid lubricant coating materials, due to its unique crystal structure characteristics and cost advantages, are not only suitable for lubrication under normal conditions, but also can apply high pressure, high vacuum, high load,

Lubrication under severe conditions such as high temperature and corrosive media, so it has good application space and market prospects. At present, there are some successful methods for preparing sulfide solid lubricant coatings.