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Improvement in Pitting Resistance of Transmission Gears by Plasma Carburizing Process
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Abstract
The application of both high strength gear steels and shot peening technology has succeeded in strengthening automotive transmission gears. This technology, though, improves mainly the fatigue strength at the tooth root, but not the pitting property at the tooth face. Therefore, demand has moved to the development of new gear steels with good pitting resistance.
In order to improve pitting resistance, the authors studied super carburizing which is characterized by carbide dispersion in the case, especially processed with a plasma carburizing furnace. Firstly, the influence of the carburizing temperature and carburizing period on the carbide morphology was investigated and the optimum carburizing conditions were determined. Secondly, the fatigue strength and pitting resistance was evaluated using carbide dispersed specimens.
Gear fatigue tests and roller pitting tests show that the 0.18%C-0.5%Si-0.3%Mn-2.25%Cr-0.4%Mo steel super carburized by the plasma carburizing furnace and shot peened has a better pitting resistance than gears conventionally gas carburized and shot peened. Furthermore, as revealed by a gear pitting test that simulates real transmission, the combination of the steel and the process shows good pitting durability.
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Authors
Citation
Kimura, T., Hatano, A., Uchiyama, N., Yoshida, M. et al., "Improvement in Pitting Resistance of Transmission Gears by Plasma Carburizing Process," SAE Technical Paper 940727, 1994, https://doi.org/10.4271/940727.Also In
References
- Namiki K. Sugiura S. Umegaki S. Yoshida Y. Tani I. Electric Furnace Steel 61 1 January 1990
- Kobayashi M. Hasegawa K. Shot Peening Proc. 4th International Conference on Shot Peening Oct. 1990 Tokyo Japan 465 475
- Namiki K. Nakayama K. Iwano T. Kenmoku T. SAE Technical Paper Series, 880416 1988
- Staines A. Bell T. Bergmann H. Heat Treat 84 48.1 1984
- Grube W. Gay J. Metal. Trans 9A 1421 1429 October 1978
- Booth M. Coat. Surf. Treat.Corros. Wear Resist. 150 163 1984
- Jacobs M. H. Law T. J. Ribet F. Surface Engeneering 1 2 105 113 1985
- Goodman D. Simons T. Industrial Heating 11 14 1987
- Pehlivanturk N. Y. Inal O. T. Ozbaysal K. Surface and Coatings Technology 35 309 320 1988
- Wentland W.L. Yung J. Y. Ion Nitriding Ion Carburizing 2q45 1990
- Hombeck F. Rembges W. Heat. Treat. 84 51.1 51.9 1984
- Legge G Industrial Heating 26 30 March 1988
- Edenhofer B. Bless F. Peter W. Materials Science Forum 102-104 849 858 1992
- Goodman D. Shimons T. Industrial Heating 14 16 November 1989
- Asano I. Araki T. Ikawa Y. Materials Sciece and Engineering A140 461 468 1991
- Souchard J. P. Jacquot P. Buvron M. Materials Science and Engineering A140 454 460 1991
- Souchard J. P. Marc. Buvron P. Ion Nitriding Ion Carburizing 195 202 1990
- Pehlivanturk N. Y. Inai O. T. 179 188 1988
- Apple C. A. Krauss G. Metal. Trans. 4 1195 1200 May 1973