Abstract
The effect of destabilisation and subcritical heat treatment on the impact toughness, hardness, and the amount and mechanical stability of retained austenite in a low carbon white cast iron have been investigated. The experimental results show that the impact energy constantly increases when the destabilisation temperature is raised from 950°C to 1200°C. Although the hardness decreases, the heat-treated hardness is still greater than the as-cast state. After destabilisation treatment at 1130°C, tempering at 200 to 250°C for 3 hours leads to the highest impact toughness, and secondary hardening was observed when tempering over 400°C. The amount of retained austenite increased with the increase in the destabilisation temperature, and the treatment significantly improves the mechanical stability of the retained austenite compared with the as-cast state. Tempering below 400°C does not affect the amount of retained austenite and its mechanical stability. But the amount of retained austenite is dramatically reduced when tempered above 400°C. The relationship between the mechanical properties and the microstructure changes was discussed.
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.References
C. P. Tabrett, I. R. Sare and M. R. Ghomashchi, Int.Mater.Rev. 41 (1996) 59.
D. J. Elwell, The British Foundryman 78 (1985) 342.
R. B. Gundlach, AFS Trans. 82 (1974) 309.
R. W. Durman, Foundry Trade Journal 134 (1973) 645.
C. P. Tabrett and I. R. Sare, Wear 203/204 (1997) 206.
H.-X. Chen, Z.-C. Chang, J.-C. Lu and H.-T. Lin, ibid. 166 (1993) 197.
J. K. Fulcher, T. H. Kosel and N. F. Fiore, ibid. 84 (1983) 313.
I. R. Sare, Metals Tech. 6 (1979) 412.
M. Radulovic, M. Fiset, K. Peev and M. Tomovic, J.Mater.Sci. 29 (1994) 5085.
K. H. Zum Gahr and D. V. Doane, Metall.Trans. 11A (1980) 613.
A. Kootsookos, J. D. Gates and R. A. Eaton, Cast Metals. 7 (1995) 239.
F. Maratray and A. Poulalion, AFS Trans. 90 (1982) 795.
H. S. Avery, in Proceedings of Materials for the Mining Industry, Vail, CO, edited by R. Q. Barr (Climax Molybdenum Company, 1974) p. 43.
S. Turenne, F. Lavallee and J. Masounave, J.Mater.Sci. 24 (1989) 3021.
I. R. Sare and B. K. Arnold, Metall.Mater.Trans. 26A (1995) 1785.
R. H. T. Dixon, JISI 197 (1961) 40.
J. I. Parks, AFS Trans. 86 (1978) 93.
J. M. Bereza, The British Foundryman 74 (1981) 205.
A. Kootsookos, PhD thesis, The University of Queensland, 1994
S. K. Hann, PhD thesis, The University of Queensland, 1998
K. H. Zum Gahr and G. T. Eldis, Wear 64 (1980) 175.
S. K. Hann and J. D. Gates, J.Mater.Sci. 32 (1997) 1249.
J. T. H. Pearce, AFS Trans. 92 (1984) 599.
M.-X. Zhang, P. M. Kelly, L. K. Bekessy and J. D. Gates, Mater.Chara. 45 (2000) 39.
M.-X. Zhang and P. M. Kelly, ibid. 40 (1998) 159.
C. S. Roberts, J.Met. 5 (19533) 203.
C. J. Ball, R. G. Blake and A.Jostsons, Metals Forum 2/3 (1985) 109.
M-X. Zhang and P. M. Kelly, Acta Mater, submitted.
G. Thomas, Metall.Trans. 2A (1971) 2373.
K. H. Zum Gahr and W. G. Scholz, J.Metals 32 (1980) 38.
B. M. Hebbar and S. Seshan, Trans.AFS 102 (1994) 349.
M. E. Garber, E. V. Rozhkova and I. I. Tsypin, Met.Sci.Heat Treat. 5 (1969) 11.
S. Parent and J. C. Margerie, AFS Trans. 80 (1972) 393.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Zhang, MX., Kelly, P.M. & Gates, J.D. The effect of heat treatment on the toughness, hardness and microstructure of low carbon white cast irons. Journal of Materials Science 36, 3865–3875 (2001). https://doi.org/10.1023/A:1017949600733
Issue Date:
DOI: https://doi.org/10.1023/A:1017949600733