This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
High - Strength Gears with High Accuracy by Combining New Steel and Ion Nitriding
Technical Paper
912534
Annotation ability available
Sector:
Event:
Language:
English
Abstract
High-strength gears with high accuracy have been increasingly required for automotive engines and transmissions to make them compact in size and to attenuate gear noise. Nitriding has the merit of smaller dimensional change than carburizing but cannot provide sufficient fatigue strength. Thus, new nitrided steel has been studied to obtain sufficient fatigue strength. In addition, to make the gears more accurate, ion nitriding and gas nitriding have been tried.
Consequently, a new hardening technique to provide compatibility of fatigue strength with accuracy was developed. The points of the technique are as follows: the use of 1.0% Cr-0.2% Mo-0.1%V steel in a state of bainite microstructure to increase the case depth and core hardness after nitriding results in a high fatigue strength equivalent to that of the carburized steel. Furthermore, selectively ion nitriding the gear teeth only results in a further limitation of dimensional change.
Recommended Content
Authors
Citation
Shibata, S., Miwa, Y., and Hanakawa, K., "High - Strength Gears with High Accuracy by Combining New Steel and Ion Nitriding," SAE Technical Paper 912534, 1991.Also In
References
- Miwa Y. Yamamoto J. Matsuno R. Ohtani Y. Journal of the Iron and Steel Institute of Japan 70 1986 13 S1287
- Ito T. Isokawa K. Kamiya H. Watanabe T. Saito M. The Japan Society of Mechanical Engineers Proceedings, No. 750-9 1975
- Glaubitz H. Werkst Bet 80 1947 249
- Kanbara S. Ohtani Y. Tsukamoto T. The Japan Society for Heat Treatment Proceedings of 20th Conference 1985 1
- Ohtani Y. Nakazato F. Murakami J. Kanbara S. Journal of the Iron and Steel Institute of Japan 68 1980 12 S1274
- Hirose Y. Matsumoto T. Iikawa Y. Kinzoku Zairyo 13 1973 14 85 96