Failure Analysis on Cracking of Large Rib of Tapered Roller Bearing Inner Rings
In response to large rib cracking in the inner ring of a tapered roller bearing roller,the causes of bearing failure have been determined by means of chemical composition analysis,metallographic structure examination and Rockwell hardness inspection.The results show that the oil groove of inner ring large rib has poor surface quality that increases the stress concentration factor.Surface oxidation and decarburization of oil groove reduce its strength,increase its notch sensitivity,eventually cause the inner ring large rib to crack.
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