Cementite Precipitation of a H21 Tool Steel after Hot Compression and Double Temper

Abstract:

The cementite precipitation behavior in the martensite and banite of the H21 tool steel under high temperature axisymmetric compression test and double temper was investigated. The main purpose on this work is to develop a better understanding regarding the transformation mechanism of bainite and martensite in a H21 tool steel. The selected deformation temperatures were 1100 ^oC and 1000 ^oC and the double temper process was carried out at 650 ^oC for 1 hour respectively. The results showed that the cementite was sensitive to the stress. The applied stress has affected the Fe₃C precipitation behaviour by decreasing the number of variants carbides in tempered martensite and decreasing the number of a single variant carbides in tempered lower bainite. The results were in agreement with a displacive mechanism of martensite and bainite transformation. It was also found that hot deformation temperatures selected in this work have the same contribution in decreasing number of variant carbides in tempered martensite and decreasing number of single variant carbides occurred in tempered lower bainite.

• Periodical: Advanced Materials Research (Volume 1043)
• Pages: 154-158
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1043.154
• Online since: October 2014
• Authors: Meilinda Nurbanasari*, Panos Tsakiropoulos, Eric J. Palmiere
• Keywords: Axisymmetric Compression, Bainite, Cementite, Martensite, Tool Steel

References

[1] J. Liu, H. Chang, R. Wu, T.Y. Hsu, and X. Ruan: Mater. Charac. 45 (2000), p.175.

[2] V.M. Khlestov, E.V. Konopleva, and H.J. Mcqueen: J. Can. Metall. Q. 37 (1998), p.75.

[3] J.M. Vitek, and R.L. Klueh: Metall. Trans 14A (1983), p.1047.

[4] L.C. Chang, and H.K.D.H. Bhadeshia: J. Mater. Sci. 31 (1996), p.2145.

[5] J.W. Stewart, R.C. Thompson, and H.K.D.H. Bhadeshia: J. Mater. Sci. 29 (1994), p.6079.

[6] A. Matsuzaki, H.K.D.H. Bhadeshia, and H. Harada, in Proceedings of G.R. Speich Symposium, Montreal Iiron and Steel Society, AIME, Warrendale, PA, USA, (1992), p.47.

[7] M. Nurbanasari, P. Tsakiropoulos, and E.J. Palmiere: Mater. Sci. Eng. A 570 (2013), p.92.

[8] G. Krauss, Tempering of Martensite in Carbon Steels, in: E. Pereloma, D.V. Edmonds (Eds. ) Phase Transformations in Steels, Woodhead Publishing, Cambridge (2012) p.126.

DOI: 10.1533/9780857096111.1.126

[9] H.K.D.H. Bhadeshia: Bainite in Steels: Stress and Strain Effect, Institut of Materials, London (2001), p.201.

[10] H.K.D.H. Bhadeshia: Acta Metall. 28 (1980), p.1103.

[11] G.B. Olson, and M. Cohen: Metall. Trans A, 14A (1983), p.1057.

[12] M. Umemoto, S. Bando, and I. Tamura, Proc. Int. Conf. on Martensitic Transformations. (ICOMAT '86), Japan Institute of Metals, (1986), p.595.

[13] H.K.D.H. Bhadeshia, S.A. David, J.M. Vitek, and R.W. Reed: Mater. Sci. Tech. 7 (1991), p.686.

[14] J.W. Christian: Metal Trans 13A (1982), p.509.

[15] H.K.D.H. Bhadeshia, Hot Workability of Steels and Light Alloys-Composites, eds. H.J. McQueen, E.V. Konpleva and N.D. Ryan, Canadian Institute of Mining, Minerals and Petroleum, Montreal, Canada, (1996), p.543.

[16] J.R. Patel, and M. Cohen: Acta MetaIl (1953), p.531.