Paper Title:
Improved FE Modeling of Center Crack Occurrence in Tube Rounds during Two-Roll Rotary Rolling Process
  Abstract

Using Oyane ductile fracture criterion, a 2-D coupled thermo-mechanical simulation of center crack occurrence in round billet during 2-roll rotary rolling process is presented with the aid of FE code MSC.Superform. Based on an existing flat-die-model, an improved FE model is advanced, in which not only the influence of roll feed angle and entry cone angle but also the diameter of the piercing roll on the process are taken into account. By adopting the parameters of the Diescher piercer in 140mm Mandrel Mill of Bao Steel in China, the distribution and development of strain/stress in tube rounds are analyzed, and the eigenvalue of ductile fracture as well. The critical percentage of diameter reduction is obtained from the simulation. The result shows a good agreement with the experimental value, and therefore is of widely guiding significance to practical process for rationally formulating deformation parameters of steel tube piercing.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1895-1898
DOI
10.4028/www.scientific.net/MSF.561-565.1895
Citation
S. Z. Li, J. Xu, X.G. Duan, J.M. Zheng, J.G. Xue, F. Pan, "Improved FE Modeling of Center Crack Occurrence in Tube Rounds during Two-Roll Rotary Rolling Process", Materials Science Forum, Vols. 561-565, pp. 1895-1898, 2007
Online since
October 2007
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$32.00
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