Two Aspects of Fatigue Crack Occurrence in Non Standard Bearings Fatigue failure of bearings is a form of failure that primarily manifests itself in the initiation, propagation, and fracture processes of fatigue cracks, and the long-term effects of load failures that occur alternately on the metal. There are two types of cracks.

From the perspective of appearance, this is due to the periodic change of touch stress in the plastic deformation and strain hardening appearance of non-standard bearings during the rolling touch process, resulting in the development of small cracks from inside to outside. The cracks between the two, due to the working appearance entering the smoothing agent, open force, seriously hit the wall, forcing the cracks to advance.

From the surface layer, under repeated pressure, the appearance of the contact begins to have a certain depth of cracks in the exposed area, and from the appearance of the touch surface to a certain depth, eventually forming corrosion peeling, leaving a pit.

From the perspective of bearing appearance or surface cracks, these two objectives (external heat treatment such as carburization and quenching of parts) are generally affected by opposite subsurface cracks if the hardness, microstructure, internal stress, and other factors are not uniform. If the appearance quality of parts is poor, there are shortcomings (oxidation, decarburization), conflicts, or smoothness, from the perspective of external cracks.

Bearing seat wear is the most common problem with bearing seats and often occurs. The traditional method usually uses processing after surfacing to stop correction. Overlay welding can bring the surface of a part to a very high temperature, causing deformation or cracking of the part, and obtaining dimensions through machining, greatly extending downtime.

Select a polymer composite material to stop on-site calibration, without thermal impact, without limiting the calibration thickness, and without compromising product wear resistance and metal materials. Ensure that the calibration part is 100% touch compatible, reducing equipment impact, and preventing the possibility of wear. Field correction to prevent machining.

For surface treatment, it will be necessary to correct the surface of the bearing seat to remove oil and moisture; To modify the material, evenly modify the material on the modified part of the bearing seat, fill it firmly and wait for the material to solidify. This can properly heat the material surface to accelerate the material solidification. Generally, the wear of the bearing chamber can be corrected within 3-6 hours. The operation is simple and easy to learn, without special equipment and special movements. Compared with laser welding, cold welding, and other technologies, it saves time and effort, and the cost is only 1/5-1/10 of the general correction cost. Field correction reduces equipment maintenance time and transportation costs.