The common types of wear in precision parts machining mainly include run-in wear, hard particle wear, surface fatigue wear, thermal wear, phase change wear, and hydrodynamic wear.

Running-in wear refers to the wear of machinery under normal load, speed, and lubrication conditions. This type of wear generally develops slowly and has little impact on processing quality in the short term.

Hard particle wear is caused by abrasive particles falling from the part itself or entering the machine tool from the outside, which are mixed into the processing area and subjected to mechanical cutting or grinding, causing damage to the part, which has a relatively serious impact on the processing quality.

Surface fatigue wear refers to the damage of parts caused by small cracks or pits produced by machines under alternating loads. This type of wear is usually closely related to factors such as pressure, load characteristics, machine material, size, and so on.

Thermal wear refers to the effect of heat generated during the friction process on the parts, causing them to temper, soften, burn, and wrinkle. This type of wear usually occurs in high-speed and high-pressure sliding friction, and is relatively destructive, accompanied by the nature of accidental wear.

Corrosive wear is a chemical action, that is, chemical corrosion causes wear. When the surface of a part comes into contact with an acid, alkali, salt liquid, or harmful gas, it will be subjected to chemical attack, or the surface of the part will combine with oxygen to form hard and brittle metal oxides that are easy to fall off and cause wear on the part.

Phase change wear refers to the wear of parts caused by long-term work at high temperatures, where the grains of the metal structure on the surface of the parts become larger when heated, and the surrounding grain boundaries are oxidized, creating small gaps, making the parts fragile and reducing their wear resistance.