There is no universal definition of "wear and tear". It is generally believed that wear is the phenomenon of continuous destruction or loss of materials on the working surface of an object in relative motion. There are also many ways to classify wear, if divided by wear mechanism, it can be divided into abrasive wear, adhesive wear, corrosion wear, erosion wear, contact fatigue wear, impact wear, fretting wear and other categories. In the industrial field, abrasive wear and adhesive wear account for the largest proportion of workpiece wear failure, and wear failure modes such as erosion, corrosion, fatigue, and fretting are often generated in the operation of some important components, so they are increasingly valued. Under working conditions, several wear forms often appear at the same time or successively, and the interaction of wear failure presents a more complex form. Determining the type of workpiece wear failure is the basis for the reasonable selection or development of wear-resistant steel.
In addition, the wear of parts is a system engineering problem, and there are many factors that affect wear, including working conditions (load, speed, movement mode), lubrication conditions, environmental factors (humidity, temperature, surrounding medium, etc.), material factors (composition, structure, mechanical properties), surface quality and physical and chemical properties of parts. A change in each of these factors can change the amount of wear and even the wear mechanism. It can be seen that the material factor is only one of the factors affecting the wear of the workpiece, and to improve the wear resistance of the steel, it is necessary to start from the friction and wear system as a whole under specific conditions to achieve the expected results.
