The working surfaces and cores of imported bearing parts have large differences in terms of condition, structure, and performance requirements, and the overall heat treatment often makes it impossible to take into account the material's potential. The application of material surface strengthening technology can not only better solve the differences in structure and requirements between the surface and the core, but also further enable the surface to obtain certain special working properties to meet the performance of the bearing on the working surface under specific conditions. Requirements. This is very meaningful in the development of modern science and technology.
In normal operation of roller bearings, in addition to rolling friction, sliding friction is also associated. The main parts where sliding friction occurs are: the contact surface between the rolling element and the raceway, the contact surface between the rolling element and the cage pocket, between the cage and the ring guide rib, and between the roller end surface and the ring guide Wait between the ribs. The presence of sliding friction in bearing roller bearings inevitably causes wear on the bearing parts. If the wear resistance of the bearing steel is poor, the roller bearing will lose its accuracy prematurely due to wear, or the bearing will increase its vibration and reduce its life due to the decrease in rotational accuracy. Therefore, it is required that the bearing steel should have high wear resistance.
The basic material requirements for roller bearings largely depend on the performance of the bearings. The selection of the appropriate material for the roller bearing will greatly affect its serviceability and life. In general, the main failure forms of roller bearings are fatigue spalling under the action of alternating stress, and the loss of bearing accuracy due to friction and wear. In addition, there are cracks, indentations, and corrosion that cause abnormal damage to the bearings. Therefore, roller bearings should have high resistance to plastic deformation, less friction and wear, good rotational accuracy, good dimensional accuracy and stability, and long contact fatigue life.