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Nitrited Steel Piston Rings for Internal Combustion Engines
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Sector:
Event:
SAE Brasil '94
Language:
English
Abstract
The evolution of internal combustion engines has led to friction reduction as well as to gaseous emissions reduction, demanding the use of narrower rings.
Nodular cast iron is used satisfactorily for compression piston rings, with wear resistant coatings to improve their durability. However, for more severe applications and rings narrower than 1.2mm, even the nodular cast iron mechanical resistance is not enough. In this way, the use of steel is recommended, which may have its tribological properties improved by the nitriding thermochemical treatment.
This paper presents the characteristics of the materials and of the nitriding process of compression and oil control rings as well as bench and dynamometric test results run during the development of these products.
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Topic
Citation
Tomanik, E., Demarchi, V., and Vatavuk, J., "Nitrited Steel Piston Rings for Internal Combustion Engines," SAE Technical Paper 942394, 1994, https://doi.org/10.4271/942394.Also In
References
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- Vatavuk, J. 1993
- Patterson, D. Hill, S. Tung, S. “Bench Wear Testing of Engine Power Cylinder Components” ICE 15 Fuels, Controls, and Aftertreatment for Low Emissions Engines 1991
- Cofap Material Catalogue 3rd 1993
- Demarchi, V. Vatavuk, J. “Development of Nitrided Oil Control Rings with Contoured Rails” SAE Paper 931670 1993
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- Demarchi, V. Vatavuk, J. COFAP 1993