Related content of imported bearings) Abrasive wear refers to the wear of external hard particles or hard foreign matter or metal surface between the working surface of the imported bearing bearing and the relative movement of the contact surface, often causing plowing on the bearing working surface. Grooved bruises. Hard particles or foreign matter may come from inside the host or from other adjacent parts of the host system and be fed into the bearing by the lubricating medium. Adhesive wear refers to uneven friction of the friction surface due to microscopic protrusions or foreign matter on the friction surface. When the lubrication condition is seriously deteriorated, local friction occurs due to local friction, which may cause local deformation of the friction surface and friction micro-welding phenomenon. When the surface metal may be partially melted, the force on the contact surface tears the local friction weld from the substrate to increase the plastic deformation. This adhesive-tear-adhesive cycle constitutes adhesive wear. In general, slight adhesive wear is called abrasion, and severe adhesive wear is called bite.
The main cause of fracture failure of imported bearing bearings is the two major factors of defects and overload. When the applied load exceeds the material strength limit and the part is broken, it is called overload fracture. The main reason for the overload is the sudden failure of the host or improper installation. Defects such as microcracks, shrinkage cavities, air bubbles, large foreign objects, overheated tissue and localized burns of the bearing parts also cause breakage at the defects during impact overload or severe vibration, called defect fracture. It should be pointed out that in the manufacturing process, in the process of re-inspection of raw materials, quality control of forging and heat treatment, and process control, the above defects can be correctly analyzed by instruments, and control must be strengthened in the future. However, in general, most of the bearing fracture failures that occur are overload failures.
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