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Factors affecting prior austenite grain size in low alloy steel

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Abstract

The effect of varying normalising and hardening temperatures on the prior austenite grain size in a low alloy Cr–Mo–Ni–V steel has been examined. An initial relative insensitivity of grain size to increasing austenitising temperature was observed followed by a sudden growth of grains at approximately 1000 °C. A detailed study of the precipitates in the steel showed the presence of a bimodal size distribution of vanadium carbides. The grain size increase is attributed to a decrease in volume fraction and an increase in size of V4C3 particles with increasing temperature.

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Acknowledgements

The present research is sponsored by the Hellenic Ministry of National Education and Religious Affairs and the European Union within the framework of the Operational Programme for Education and Initial Vocational Training (O.P. “Education”) -the latter being cofinanced by the European Social Fund, the European Regional Development Fund and national resources

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Applied Science of West Macedonia, Pl. 25 Martiou 5, Koila, 50100, Kozani, Greece

    S. Maropoulos & S. Karagiannis

  2. Materials Science Centre, University of Manchester, Grosvenor Street, Manchester, M1 7HS, UK

    N. Ridley

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  1. S. Maropoulos
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  2. S. Karagiannis
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  3. N. Ridley
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Correspondence to S. Maropoulos.

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Maropoulos, S., Karagiannis, S. & Ridley, N. Factors affecting prior austenite grain size in low alloy steel. J Mater Sci 42, 1309–1320 (2007). https://doi.org/10.1007/s10853-006-1191-4

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  • DOI: https://doi.org/10.1007/s10853-006-1191-4

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