Elsevier

Scripta Materialia

Volume 57, Issue 2, July 2007, Pages 109-112
Scripta Materialia

Nb(C,N) precipitation kinetics in the bainite region of a low-carbon Nb-microalloyed steel

https://doi.org/10.1016/j.scriptamat.2007.03.041Get rights and content

Nb(C,N) precipitation in the bainite region (580–660 °C) of a low-carbon Nb-microalloyed steel was investigated by electrical resistivity and transmission electron microscopy. Nb(C,N) particles started precipitating after 100–200 s at isothermal temperatures after bainite transformation and cementite formation, and precipitation finished in 1000–2000 s. The precipitation-time–temperature diagram of Nb(C,N) in the bainite region of a low-carbon microalloyed steel was a type of C-curve, with a nose temperature of about 615 °C.

References (19)

  • S.G. Hong et al.

    Scripta Mater.

    (2002)
  • K.B. Kang et al.

    Scripta Mater.

    (1997)
  • J.S. Park et al.

    Scripta Mater.

    (2007)
  • T. Gladman

    Ironmaking Steelmaking

    (1989)
  • H.-J. Kestenbach et al.

    Mater. Sci. Tech.

    (2006)
  • S.S. Hansen et al.

    Metall. Trans. A

    (1980)
  • G. Fitzsimons et al.

    Metall. Trans. A

    (1984)
  • C.S. Janampa, PhD Thesis, University of Sheffield,...
  • S.F. Medina et al.

    ISIJ Int.

    (1993)
There are more references available in the full text version of this article.

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