The sintered body made by powder metallurgy with metal powder as the main raw material for oil bearing is originally porous, and has the technical advantages of freely adjusting the number, size, shape and distribution of pores in the manufacturing process. The porous sinter is impregnated with 10%~40% lubricating oil and used under self oil supply condition.

During operation, the temperature of oil bearing rises. Since the expansion coefficient of oil is larger than that of metal, it automatically enters the sliding surface to lubricate the bearing. Oily bearings can be used for a long time after being oiled once, and are often used in inconvenient situations. The metal matrix inlaid solid self-lubricating bearing is a new type of bearing with both the characteristics of metal bearing and self-lubricating bearing. The metal matrix bears the load, and the specially formulated solid lubricating materials play the role of lubrication.

It has the characteristics of high bearing capacity, impact resistance, high temperature resistance, strong self-lubricating ability, etc. It is especially suitable for heavy load, low speed, reciprocating or swinging and other occasions where it is difficult to lubricate and form oil film, and is not afraid of water erosion and erosion of other acid solutions. Embedded bearing not only saves oil and energy, but also has a longer working life than ordinary sliding bearing. At present, the products have been widely used in metallurgical continuous casting machines, rolling equipment, mining machinery, ships, steam turbines, water turbines, injection molding machines and equipment production lines.

Therefore, in comparison, oil bearing is a combination of metal powder with a structural clearance of 10~40%; The inlaid self-lubricating bearing matrix is centrifugally cast; The matrix density is relatively high, the bonding strength is higher than that of oil bearing, and the service life is longer than that of oil bearing;

The lubricating material of oil bearing is lubricating oil, and the oil film has enough thickness to eliminate the direct contact between two friction surfaces. At this time, there is only friction between liquid molecules, so the friction coefficient is very small, which significantly reduces friction and wear; The lubricating material of embedded self-lubricating bearing is solid lubricating material. Even under oil-free working conditions, it can achieve good lubrication effect, ensure uninterrupted and sustainable lubrication, and its effective lubrication life is consistent with that of the matrix.

The lubricating oil in the oil bearing is volatile and easy to be lost, and the lubricating oil film is lost rapidly under high temperature and pressure, so it is impossible to obtain the proper lubricating effect; Through friction, the solid lubricant in the hole or groove transfers or reversely transfers to the friction surface, forming a solid transfer film with good lubrication, firm adhesion and uniform coverage on the friction surface, which greatly reduces friction and wear. With the friction going on, the embedded solid lubricant is continuously provided on the friction surface, which provides good lubrication for the friction pair during long-term operation.