Contact fatigue damage is SKF bearings mainly in the form of the normal damage. Operation of rolling bearings, rolling element bearings in SKF inner and outer ring raceways between scroll, its subjected to cyclical alternating load the contacts, can be up to hundreds of thousands of times per minute, in cyclical alternating stress under cyclic role, contact surface fatigue spalling occurs. Rolling bearings SKF bearing vibration caused by spalling concrete will be started to occur, the noise increases the sharp increase in operating temperature, resulting in SKF bearing the final damage, this form known as contact fatigue damage. Therefore, SKF bearings require rolling bearing steel should have high rate of contact fatigue strength.
　Rolling bearing working, in addition to the rolling friction occurs outside, accompanied by sliding friction. Sliding friction is the main part of: contact surfaces between the rolling elements and raceways, contacts between rolling elements and cage Pocket face, between the cages and rings guide flanges, as well as between roller end faces and rings guide flanges. Inevitably resulted in the existence of sliding friction of rolling bearings of SKF bearings SKF bearing parts wear. If the poor wear resistance of bearing steel, will be due to wear of rolling bearings and lower the premature loss of precision or running accuracy and SKF bearing vibration increases, reduced life expectancy. Thus, SKF bearing steel should have high resistance to wear.
　Materials for rolling bearings depends to a large extent, the fundamental requirements of working performance of SKF bearings. Suitability of selected manufacturing materials for rolling bearings, on their performance and life will have a big impact. Under normal circumstances, the main failure mode of rolling bearing is under alternating stress fatigue spalling, SKF bearings as well as loss of SKF bearings precision due to friction and wear. In addition, there are cracks, indentation, SKF bearing abnormal damage caused by corrosion reasons. Therefore, should have a high ability to resist plastic deformation of rolling bearings, friction and wear less, good running accuracy, good dimensional accuracy and stability, as well as contact fatigue life.

 


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