Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Analysis of Deformation of Automotive Helical Gear in Heat Treatment of Carburized Quenching

차량용 헬리컬기어의 침탄 열처리 변형해석

  • Received : 2010.07.27
  • Accepted : 2010.09.10
  • Published : 2010.11.01
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Abstract

Heat treatment with carburized quenching process is widely used for automotive helical gear to improve its surface properties of hardness and strength. However, the gear can be deformed with the process over the allowable tolerance, which possibly makes noise, vibration and heat problems in operation. In this study, deformation of helical gear during heat treatment of carburized quenching was analyzed with a numerical method, incorporating coupled calculations of thermal conduction, carbon diffusion, phase transformation and thermal stresses. With the analysis, the effect of coolant temperature in quenching on the deformation was investigated. The result of the analysis revealed that the higher the coolant temperature became, the more change of helix angle and the more compressive stresses in the surface generated, because of delayed generation of martensite in the part.

Keywords

References

  1. Kamouneh, A. A., Ni, J., Stephenson, D. and Vriesen, R., "Investigation of work hardening of flat-rolled helical-involute gears through grain-flow analysis, FE-modeling, and strain signature," Int. J. of Machine Tools & Manufacture, Vol. 47, No. 7-8, pp. 1285-1291 , 2007. https://doi.org/10.1016/j.ijmachtools.2006.08.014
  2. Kim, H. J., Choi, S. C., Lee, D. J. and Kim, H. Y., "Analysis of the Carburizing Heat Treatment Process for SNCM Alloy Steel Using the Finite Element Method," Tran. of the KSME(A), Vol. 20, No. 10, pp. 1284-1292, 2006.
  3. Cho, J. R., Kang, W. J., Kim, M. G., Lee, J. H., Lee, Y. S. and Bae, W. B., "Distortions induced by heat treatment of automotive bevel gears," J. of Materials Processing Technology, Vol. 153-154, pp. 476-481, 2004. https://doi.org/10.1016/j.jmatprotec.2004.04.131
  4. Antoniadis, A., Vidakis, N. and Bilalis, N., "A simulation model of gear skiving," J. of Materials Processing Technology, Vol. 146, No. 2, pp. 213-220, 2004. https://doi.org/10.1016/j.jmatprotec.2003.10.019
  5. Ju, D. Y., Liu, C. and Inoue, T., "Numerical modeling and simulation of carburized and nitrided quenching process," J. of Mat. Pro. Tech., Vol. 143-144, pp.880-885, 2003. https://doi.org/10.1016/S0924-0136(03)00378-9
  6. Youn, I. J., Lyu, S. K., An, C. W. and Ahn, I. H., "Characteristic on the Heating Deformation of Sleeve by Heating Method," J. of the Korean Society of Safety, Vol. 21, No. 3, pp. 1-7, 2006.
  7. Sugianto, A., Narazaki, M., Kogawara, M., Shirayori, A., Kim, S. Y. and Kubuta, S., "Numerical simulation and experimental verification of carburizing-quenching process of SCr420H steel helical gear," J. of Mat. Pro. Tech., Vol. 209, No. 7, pp. 3597-3609, 2009. https://doi.org/10.1016/j.jmatprotec.2008.08.017
  8. Song, G. S., Liu, X. H., Wang, G. D. and Xu, X. Q., "Numerical Simulation on Carburizing and Quenching of Gear Ring," Int. J. of Iron and Steel Research, Vol. 14, No. 6, pp. 47-52, 2007. https://doi.org/10.1016/S1006-706X(07)60089-2
  9. Inoue, T., Yamaguchi, T. and Wang, Z., "Stresses and Transformations Occurring in Quenching of Carburized Steel Gear Wheel,'' Mater. Sci. Technol., Vol. 1, No. 10, pp. 872-876, 1985. https://doi.org/10.1179/026708385790124044
  10. Lyu, S. K., "Effects of Heat-treatment on the Bending Fatigue Strength of SNC815 Carburized Spur Gear," J. of the Korean Society for Precision Engineering, Vol. 11, No. 6, pp. 12-19, 1994.
  11. Linnert, G. E., "Welding Metallurgy(3rd ed.)," Vol. 2, American Welding Society, pp. 334-337, 1967.
  12. Kim, W. I., Kim, H. S. and Shin, K. H., "New Mechanical manufacturing Process," Moonundang, pp. 115-116, 1997.
  13. Lyu, S. K., Nam, T. H. and Lee, J. Y., "A Study on the Effect of Heat-treatment on the Fatigue Strength of SNC815 Spur Gears," J. of the Korean Society Heat Treatment, Vol. 13, No. 1, pp. 21-26, 2000.