Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2008, Vol. 29 ›› Issue (2): 221-224.DOI: -

• OriginalPaper • Previous Articles     Next Articles

Effect of Nb on low-carbon Si-Mn steel during continuous cooling transformation

Shang, Yan (1); Ding, Hua (1); Li, Long (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-02-15 Published:2013-06-22
  • Contact: Shang, Y.
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Abstract: The continuous cooling transformation (CCT) tests of low-carbon Si-Mn steel were conducted on Gleeble 1500 thermal simulator with and without Nb addition, and the relevant curves were plotted under deformed and undeformed conditions. The results showed that the undeformed CCT curves mostly go down due to the effect of Nb addition that lowers the phase transformation temperature of ferrite (Ar3), while the deformed CCT curves go up due to the effect of strain-induced precipitates as Nb(C, N), which raises Ar3 hence lowers the starting cooling rate in banite transformation. Moreover, ferrite grains were refined obviously with the addition of Nb under deformed conditions, thus hardening greatly the tested steel.

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