This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effect of Composition and Microstructure on the Pitting Fatigue of Carburized Steel Cases
Annotation ability available
Sector:
Language:
English
Abstract
The pitting fatigue of a wide range of heat-treated carburizing steels has been investigated. The effects of compositions conforming to 1024, 8620, 4620, 4027, 2048, 4419, 4817 and 9310 at two levels of case carbon content were studied in lubricated concentrated contact. Different microstructures were produced in the 4817 and 9310 steels by combination of case carbon level and subzero treatments. Testing was carried out on geared roller test machines.
Pitting fatigue was found to be dependent on microstructure rather than steel composition. As long as the steel possessed sufficient hardenability to avoid transformation products, then fatigue life is not markedly different. It appears that the presence of retained austenite can improve pitting fatigue resistance.
Recommended Content
Authors
Topic
Citation
Howes, M. and Sheehan, J., "The Effect of Composition and Microstructure on the Pitting Fatigue of Carburized Steel Cases," SAE Technical Paper 740222, 1974, https://doi.org/10.4271/740222.Also In
References
- Sheehan J. P. Howes M. A. H. “The Effect of Case Carbon Content and Heat Treatment on the Pitting Fatigue of 8620 Steel.” SAE Transactions 81 1972 paper 720268
- Sheehan J. P. Howes M. A. H. “The Role of Surface Finish in Pitting Fatigue of Carburized Steel.” Paper 730580 SAE Automobile Engineering Meeting Detroit May 1973
- Razim C. “Influence of Retained Austenite and Carbide Networks on the Tendency Towards Pit Formation in Case-Hardened Steels.” Stuttgart 1967
- Denning R. E. Rice S. L. “Surface Fatigue Research with the Geared Roller Test Machine.” Paper 620B SAE Automotive Engineering Congress Detroit January 1963