Aiming at the tooth root wear problem of thin-walled gear ring considering the hardness gradient of carburized layer of thin-walled gear ring, the tooth root wear failure mechanism of thin-walled gear ring is analyzed based on Hertz contact theory, Archard wear theory, etc. Based on the first order second moment reliability analysis method, the tooth root wear reliability analysis model of thin-walled gear ring is established, which is compared with the wear reliability without considering the hardness gradient of carburized layer. The results show that the actual wear reliability with carburized layer hardness gradient is lower than that without carburized layer hardness gradient.
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