Paper Title:
Influence of Repeated Quenching After Carburizing on Prior Austenite Grain Size
  Abstract

High strengths and impact values are required for carburizing steels used for automotive drive train parts. It is well known that the finer-grain microstructures are favorable for these properties. In this study, with a view to effective refining of grain size with controlling the alloying elements, influence of Mn and Cr content on prior austenite grain size after carburizing and repeated quenching was investigated on Ti-modified carburizing steels with ferrite and pearlite microstructure. It was found that the increase in Mn and Cr contents in steels were effective for the grain refining. These effects were attributed to fine ferrite and pearlite microstructure caused by the lowered Ar3 point due to higher Mn content, and retarding the grain growth of austenite by the fine dispersion of carbides in the carburized layer of specimen due to higher Cr content.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
2345-2348
DOI
10.4028/www.scientific.net/MSF.561-565.2345
Citation
T. Fujimatsu, M. Nishikawa, K. Hashimoto, A. Yamamoto, "Influence of Repeated Quenching After Carburizing on Prior Austenite Grain Size", Materials Science Forum, Vols. 561-565, pp. 2345-2348, 2007
Online since
October 2007
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