Paper Title:
Nitriding of a Nb-Microalloyed Thin Strip Cast Steel at 525°C
  Abstract

This study investigates the effect of N diffusion on a Nb-microalloyed steel made by twin roll casting at 525o C in a KNO3 salt bath. Nitriding up to 4 h increases the yield strength of the steel by ~50% with only a small drop in ductility, while 6 hours of nitriding causes brittle fracture. The improved mechanical performance after 4 hours of nitriding is thought to be a combined effect of solid solution strengthening of N diffusion and dispersion strengthening from extremely fine Nb-rich precipitates. Coarse features along grain boundaries consistently observed in steel nitrided for 6 hours are considered to be responsible for brittle fracture in samples nitrided for longer.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
106-109
DOI
10.4028/www.scientific.net/MSF.654-656.106
Citation
K. Y. Xie, C. Zhu, J. M. Cairney, S. P. Ringer, C. R. Killmore, F. J. Barbaro, J. G. Williams, "Nitriding of a Nb-Microalloyed Thin Strip Cast Steel at 525°C", Materials Science Forum, Vols. 654-656, pp. 106-109, 2010
Online since
June 2010
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Price
$32.00
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