Investigation on the Formation of Reversed Austenite in QT Treatment

Abstract:

Microstructures of 9Ni steel quenched at different temperatures were obtained, and a simulated tempering at different temperature was implemented with the DIL850A dilatometer, then the effect of initial microstructure before tempering on the formation of reversed austenite was studied. Results show that the formation of reversed austenite during tempering becomes easier with the decrease of quenching temperature and the increasing of tempering temperature, but the stability may deteriorates with the rapid increasing of reversed austenite in content. Overall, the amount of reversed austenite mainly depends on the tempering temperature, and its formation rate is affected by the quenching temperature because refined quenching microstructure can promote the formation of reversed austenite observably.

• Periodical: Advanced Materials Research (Volume 1081)
• Pages: 219-223
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1081.219
• Online since: December 2014
• Authors: Yue Hui Yang*, Jing Li, Shao Qiang Yuan, Guo Li Liang
• Keywords: 9Ni Steel, Quenching Microstructure, Reversed Austenite

References

[1] B. Fultz, J.I. Kim, Y.H. Kim: Metall. Trans. A Vol. 16(1985), p.2237.

[2] M. Lei, Y.Y. Guo: Acta Metall. Sin. Vol. 25(1989), p.13.

[3] K.J. Kim, L.H. Schwartz: Mater. Sci. Eng., A Vol. 33(1978), p.5.

[4] J.R. Strife, D.E. Passoja: Metall. Trans. A Vol. 11(1980), p.1341.

[5] B. Fultz, J.I. Kim, Y.H. Kim: Metall. Trans. A Vol. 17(1986), p.967.

[6] N. Nakada, J. Syarif, T. Tsuchiyama: Mater. Sci. Eng., A Vol. 374( 2004), p.137.

[7] F.T. Zhang, J.Y. Wang, Y.Y. Guo: Acta Metall. Sin. Vol. 20(1984), p.405.

[8] Y.H. Yang, Q.W. Cai, H.B. Wu: Acta Metall. Sin. Vol. 45(2009), p.270.

[9] Y.H. Yang, Q.W. Cai, D. Tang: Int. J. Miner. Metall. Mater. Vol. 17(2010), p.587.

[10] R. Rautioaho, P. Karjalainen, M. Moilanen: J. Magn. Magn. Mater. Vol. 68 (1987), p.321.