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The Valve Springs Carbo-Nitrided at a High Temperature for High Speed Engines
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Abstract
A new heat resistant steel wire was developed for automotive valve springs. The purpose of the development is to apply a high temperature carbo-nitriding process to the springs to have a longer fatigue life. The valve spring processed at an optimal temperature was found to have a fatigue life about five times as long as the conventional Si-Cr oil-tempered wire springs processed at a conventional low temperature.
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Authors
- Taisuke Nishimura - Honda R&D Co Ltd Asaka Center
- Yoshitoshi Hagiwara - Honda R&D Co Ltd Asaka Center
- Katsuhiko Yamada - Chuo Spring Co. Ltd.
- Toshio Ozone - Chuo Spring Co. Ltd.
- Yukio Itoh - Daido Steel Co. Ltd.
- Hiroaki Hayashi - Suzuki Metal Industry Co. Ltd
- Satoru Homma - Suzuki Metal Industry Co. Ltd
Citation
Nishimura, T., Hagiwara, Y., Yamada, K., Ozone, T. et al., "The Valve Springs Carbo-Nitrided at a High Temperature for High Speed Engines," SAE Technical Paper 890777, 1989, https://doi.org/10.4271/890777.Also In
References
- Metal Handbook 9th American Society for Metals 4 34
- Ishikawa U. Theoretical Inorganic Chemistry Uchida Pub. Co. Tokyo 1952 133
- Ozone T. et al. “Effect of annealing on the fatigue springs,” Proceedings of 1981 meeting of Japanese Society of Spring Research 9
- Petch N.J. J. Iron and Steel Inst. 174 1953 25
- Johnston W.G. Gilman J.J. J. Appl. Phys. 30 129 1959
- Ozone T. et al. “Precipitation Strengthened Spring Steel for Automotive Suspensions,” SAE Paper 820129