A Study on the Improvement of Durability of Gear Steel by Shot Peening

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In this paper the fatigue life of spur gear was investigated by changing the shot peening condition. From bending fatigue test depending on various shot peening intensity, fatigue characteristics were investigated. The causes of reduction in fatigue life were analyzed by observing the surface of gear with Scanning Electron Microscope(SEM), and impact of residual stress to fatigue characteristics was identified by measuring compressive residual stress depending peening intensity by depth. The results show that the optimum shot ball velocity is 65 m/s and optimum peening time is 8 minutes. From SEM image, the micro-crack was observed at the surface in case of over peening. This seems to be the factor which reduces fatigue life by decreasing compressive residual stress of surface.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

662-665

DOI:

10.4028/www.scientific.net/KEM.321-323.662

Citation:

D. S. Lee et al., "A Study on the Improvement of Durability of Gear Steel by Shot Peening", Key Engineering Materials, Vols. 321-323, pp. 662-665, 2006

Online since:

October 2006

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Price:

$35.00

[1] J. K. Xenophon: SAE Technical Paper Series 891932 (1989), pp.1-8.

[2] P. Zhang, J. Lindemann: Scripta Materialia, Vol. 52 (2005), pp.485-490.

[3] T. H. Kim, S. K. Cheong and Y.E. Shin: Journal of Korean Society of Mechanical Engineers (2002), pp.335-340.

[4] J.H. Nam, T.H. Kim, K.J. Lee, D.S. Lee and S.K. Cheong: Journal of Korean Society of Automotive Engineers, Vol. 3 (2004), pp.335-340.

[5] Sharma M.C.: Proc. of 6th International Fatigue Congress (1996), pp.1397-1402.

[6] S. K Cheong, S.H. Lee: Theory of shot peening process (Sae Hwa Publications, Korea 2001).

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