The metallurgical quality of bearing materials used to be the main factor affecting the early failure of rolling bearings. With the progress of metallurgical technology (such as bearing steel vacuum degassing, etc.), the quality of raw materials has been improved, the proportion of raw material quality factors in the bearing failure analysis has been significantly reduced, but it is still one of the main factors affecting the bearing failure, and the selection of appropriate materials is still a bearing failure analysis must be considered.

1, tile surface corrosion: spectral analysis found that the concentration of non-ferrous metal elements is abnormal; iron spectra appeared in many non-ferrous metal components of submicron wear particles; lubricating oil moisture exceeds the standard, acid value exceeds the standard.

2, journal surface corrosion: spectral analysis found that the concentration of iron elements is abnormal; there are many submicron particles of iron components in the iron spectrum; lubricant moisture exceeds the standard or acid value exceeds the standard.

3, journal surface strain: iron spectrum in the iron cutting abrasive particles or black oxide particles, metal surface tempering color.

4, tile back micro-motion wear: spectral analysis found that the iron concentration is abnormal, iron spectrum has many iron components submicron wear particles, lubricating oil moisture and acid value is abnormal.

5、Bearing surface strain: iron spectrum found in the cutting abrasive particles, abrasive particles composed of non-ferrous metals.

6, tile surface spalling: iron spectrum found in many large size fatigue spalling alloy wear particles, laminar abrasive particles.

7, bearing burning tile: iron spectrum has more large size alloy wear particles and ferrous metal oxides.

Bearing manufacturing generally after forging, heat treatment, turning, grinding and assembly and other multi-processing procedures, the rationality of each processing technology, advanced, stability will also affect the life of the bearing, which affects the quality of the finished bearing heat treatment and grinding processing procedures, often with bearing failure has a more direct relationship. In recent years on the bearing surface deterioration layer of the research shows that the grinding process and bearing surface quality of the close relationship.

Bearing service life analysis of the main task, is based on a large number of background materials, analytical data and failure form, to find out the main factors causing bearing failure, in order to target the proposed improvement measures, to extend the service life of the bearing, to avoid the occurrence of sudden early failure of the bearing.