For a long time, it is believed that the wear of card clothing is mainly low-stress soft abrasive wear: the fiber is regarded as soft abrasive, and each fiber is a series of particles. The micro-convex on the surface of the needle tooth is constantly subjected to repeated pulse carding force, which causes fatigue peeling and forms wear on the needle tooth. Further research and analysis on the wear of card clothing suggest that oxidation wear should be the main wear form of card clothing. The oxidation wear of the needle clothing is mainly caused by the formation and falling off of the oxidation surface film on the surface of the needle teeth. The wear mechanism of soft abrasive will lead people to pay attention to the strength and toughness of the needle tooth, while the formation and falling off of the oxidation surface film on the needle tooth surface under the oxidation wear mechanism will lead people to pay attention to the oxidation resistance of the needle tooth surface and the strength of the surface film. Thus, the direction and emphasis of material optimization and alloying are different.

The research shows that there is a phenomenon of "dry oxidation" of metal in the atmosphere (dry atmosphere), and an invisible film with a thickness of only tens of ⊙ (angstrom=10-10m) will be formed on the surface. When the metal is exposed to the air, it will naturally form an oxide film on the metal surface. The film with a thickness of more than 5000 ⊙ is visible, the film with a thickness of 400 〜~5000 〞 appears oxidation color, and the film with a thickness of less than 400 〞 is invisible.

The form of oxidation wear under specific conditions is surface film formation - damage wear. Under temperature and humidity working conditions, the surface of the card clothing forms a metal oxide film with a thickness of tens of angstroms to hundreds of angstroms, which is different from the substrate. During the carding process, the local surface film was damaged and fell off successively, and then a new surface film was regenerated. These partially damaged, being damaged, having been generated and being generated interwoven together to form a "sub-metallic luster" dynamic needle clothing tooth surface film.

Another kind of corrosive wear also needs attention. Corrosive wear refers to a kind of wear accompanied by corrosion during friction. For example, the surface of metal materials undergoes chemical or electrochemical reaction in liquid, gas or lubricant, forming corrosion products that are easy to be worn or peeled off; In the process of friction, the corrosion products are peeled off, and the exposed new metal surface enters into a new chemical reaction, so that the corrosion and wear occur alternately, resulting in material loss.