Paper Title:
Optimization of Heat Treatment Parameters of Mo-Free High-Cr Cast Iron Mill Balls
  Abstract

A Mo-free high-Cr cast iron with superior impact-wear resistance was tried to develop for mill balls by alloy design and subsequent heat treatment. The Cr/C ratio was varied up to 7.7 in order to minimize and eventually eliminate Mo addition, still ensuring hardenability. For the proper balance between abrasion resistance and toughness, the combined effects of each heat treatment parameters on the mechanical properties were systematically investigated using Taguchi method and response surface method (RSM), well recognized as powerful tools of the designs of experiments (DOE). It was found that hardness and impact energy were mainly affected by tempering and destabilization conditions, respectively. It is noted that high impact energy of 5.2 J/cm2 was obtained without deteriorating hardness (54 HRc) during the verification experiments under the heat treatment condition optimized by the DOE analyses.

  Info
Periodical
Advanced Materials Research (Volumes 26-28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
913-916
DOI
10.4028/www.scientific.net/AMR.26-28.913
Citation
S. M. Lee, B. H. Kim, J. S. Shin, B.M. Moon, "Optimization of Heat Treatment Parameters of Mo-Free High-Cr Cast Iron Mill Balls", Advanced Materials Research, Vols. 26-28, pp. 913-916, 2007
Online since
October 2007
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$32.00
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