Failure Analysis of Plane Thrust Bearing of Oil Screw Press

Abstract:

The service condition of plane thrust bearing of worm shaft in an oil screw press was analyzed. The fracture failure of the bearing rings was systematically investigated through physical-chemical test, trace inspection, fractographic appearance, and metallographic structure analysis. The results showed that a great amount of network surface cracks near bearing ring edge, some dot shaped internal oxidations and secondary crack initiation, higher hardness, as well as the network carbides and coarse quenching martensites led to the early brittle fracture of the bearing rings. The further improvements were normalizing and isothermal spheroidizing annealing can eliminate the network carbides and improve the microstructure in preheat treatment process, and quenching temperature and heating time can not be too high and long in final heat treatment. Hardness of the material is preferably 60-62 HRC.

• Periodical: Applied Mechanics and Materials (Volumes 201-202)
• Pages: 525-528
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.201-202.525
• Online since: October 2012
• Authors: Shi Long Li, Zhi Gang Hu
• Keywords: Failure Analysis, Plane Thrust Bearing, Screw Press, SEM

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