INA bearing failure factor analysis

INA bearings at work, due to various complicated reasons, such as unreasonable structure, poor quality of materials, low performance, work on the surface of the defect, shock, vibration, improper installation and poor lubrication, etc. , all can cause premature failure of the bearing. However, in some cases, some INA bearings are not put into use, Running) , the user is installed in the process of the integrity of the original face that have been damaged, lost its usability, cause premature bearing failure. Obviously loose defects in the finished product is not allowed on bearing ring. It will reduce the density of ring, enrichment of the internal more micro pore, low melting point impurity, gas and nonmetallic inclusions. It like banded carbide, dividing matrix continuity effect, cause the composition segregation, matrix embrittlement, greatly reduce the comprehensive mechanics performance of the ring. Black and white state quenching tempering martensite matrix concentration, the higher macro hardness value and the loose defects and so on, also is a when grinding cracks induced potential factors which cannot be ignored. Black and white concentration difference appeared in the original organization exists serious banded carbide, the resulting take between the belt and the concentration of carbon, segregation, so after quenching increases the overheating tendency between the belt and Ms point of the difference in height. Internal factors mainly refers to the structure design, manufacturing process and material quality and so on three major factors in determining the quality of bearing. First of all, reasonable structure design and equipped with advanced, just can have a long bearing life. Bearing manufacturing generally go through forging, heat treatment, cutting, grinding and assembly, and multi-channel processing operations. The rationality of the processing technology, advanced, stability will also affect the service life of bearing. Which affects the quality of finished products bearing heat treatment and grinding process, tend to have a more direct relationship with bearing failure. In recent years the study of metamorphic layer of bearings working surface show that the grinding process and is close to the surface quality of the bearing. INA bearing materials of metallurgical quality were the main factors influencing the premature failure of the rolling bearing. As metallurgy technology, For example, the bearing steel vacuum degassing, etc. ) Progress, raw material quality is improved. Raw material quality factor in the bearing failure analysis share has declined obviously, but it is still one of the main influence factors of bearing failure. Select material adequacy is still bearing failure analysis factors must be considered. The main task of the INA bearing failure analysis, it is based on a lot of background material, analyze data and failure forms, find out the main factors of bearing failure, so that the improvement measures are put forward, prolonging bearing, avoid premature failure of the bearing of the sudden.