Paper Title:
The Effect of Transformation Plasticity on Prediction of Tooth Distortion of Heat-Treated Helical Gear
  Abstract

The displacement profile in a shank and dedendum-addendum circle of helical gear made of through-hardened S45C carbon steel and carburized-hardened SCr420H low alloy steel by gas carburizing was measured and predicted using a finite element method of DEFORM-HT. Both gears were quenched into same oil quenchant. Heat Transfer Coefficient (HTC) was taken by measuring thermal history inside of firstly silver probe and secondly stainless steel SUS304 gear blank. Uniform HTC of silver probe was calculated by lumped heat capacity method, whereas zone-based HTC of SUS304 gear blank was calculated by iterative modification method. Transformation plasticity was included and excluded to predict the tendency of distortion. Simulation results were analyzed and compared to the experimental results to validate the influence of transformation plasticity on the prediction of distortion during the martensitic and bainitic/pearlitic transformation. However, more accurate distortion profiles require detailed HTC by taking thermal history on the surface of the tooth.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1853-1856
DOI
10.4028/www.scientific.net/MSF.561-565.1853
Citation
A. Sugianto, M. Narazaki, M. Kogawara, S.Y. Kim, S. Kubota, "The Effect of Transformation Plasticity on Prediction of Tooth Distortion of Heat-Treated Helical Gear", Materials Science Forum, Vols. 561-565, pp. 1853-1856, 2007
Online since
October 2007
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$32.00
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