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Modelling the continuous cooling transformation diagram of engineering steels using neural networks

Part I: Phase regions
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Published/Copyright: February 15, 2022

Abstract

A neural network model for the calculation of the phase regions of the continuous cooling transformation (CCT) diagram of engineering steels has been developed. The model is based on experimental CCT diagrams of 459 low-alloy steels, and calculates the CCT diagram as a function of composition and austenitisation temperature. In considering the composition, 9 alloying elements are taken into account. The model reproduces the original diagrams rather accurately, with deviations that are not larger than the average experimental inaccuracy of the experimental diagrams. Therefore, it can be considered an adequate alternative to the experimental determination of the CCT diagram of a certain steel within the composition range used. The effects of alloying elements can be quantified, either individually or in combination, with the model. Nonlinear composition dependencies are observed.


Dr. Ir. Jilt Sietsma Rotterdamseweg 137, 2628 AL Delft, The Netherlands Tel:: +31 15 278 2284 Fax: +31 15 278 6730

  1. Financial support of the ECSC D3 committee is gratefully acknowledged.

References

1 Van Leeuwen, Y.: Moving interfaces in plain carbon steels, a phase transformation model, Ph. D. Thesis, Delft University of Technology, Delft (2000).Search in Google Scholar

2 Parker, S.V.: Modelling of phase transformations in hot-rolled steels, Ph. D. Thesis, University of Cambridge, Cambridge (1997).Search in Google Scholar

3 Marden, D.A.R.; Goldstein, J.I. (eds.): Phase transformations in ferrous alloys, AIME, New York (1983) 128.Search in Google Scholar

4 Krielaart, G.P. : Primary ferrite formation from supersaturated austenite, Ph. D. Thesis, Delft University of Technology, Delft (1995).Search in Google Scholar

5 Vermeulen, W.G.; Morris, P.F.; De Weijer, A.P.; Van der Zwaag, S.: Steel Res. 68 (1997) 72.10.1002/srin.199700545Search in Google Scholar

6 Van der Wolk, P.J.; Wang, J.; Sietsma, J.; Van der Zwaag, S.: Z. Metallkd. (2002), Part II, 1208.10.3139/146.021208Search in Google Scholar

7 Cias, W.W.: Phase transformation kinetics and hardenability of medium-carbon alloy steels, Climax Molybdenum Company, Greenwich (1973).10.1007/BF02669365Search in Google Scholar

8 Doane, D.V.; Kirkaldy J.S. (eds.): Hardenability concepts with applications to steels, AIME, New York (1978) 163.Search in Google Scholar

9 Thelming, K.E.: Steel and its heat treatments, Butterworths, London (1975) 85–99.Search in Google Scholar

10 Van der Wolk, P.J.: Modelling the CCT diagram of engineering steels using neural networks, Ph. D. Thesis, Delft University of Technology, Delft (2001).Search in Google Scholar

11 Anon: Atlas zur Wärmebehandlung der Stähle, Verlag Stahleisen GmbH, Düsseldorf (1954).Search in Google Scholar

12 Anon: Iron and Steel Research Institute of Anshan Iron & Steel Company, Metallurgy Industry Publishers, Beijing (1992).Search in Google Scholar

13 Anon: Atlas of Continuous Cooling Diagrams for Vanadium Steels, Vanitec, Kent (1985).Search in Google Scholar

14 Hecht-Nielsen, R.: Neurocomputing, Addison-Wesley Publishing Company, Reading (1990).Search in Google Scholar

15 Kennard, R. W.; Stone, L. A.: Technometrics 11 (1969) 137–149.10.1080/00401706.1969.10490666Search in Google Scholar

16 Van Straaten, R.: M. Sc. Thesis, Delft University of Technology, Delft (2000).Search in Google Scholar

17 Reynolds, W.T.; Li, F.Z. et al.: Met. Trans. A 21 (1999) 1433–1463.10.1007/BF02672561Search in Google Scholar

18 Pacyna, J.; Paluszkiewicz, T.: Steel Res. 59 (1988) 34–42.10.1002/srin.198800271Search in Google Scholar

19 Oi, K.; Lux, C.: Acta Mater. 48 (2000) 2147–2155.10.1016/S1359-6454(00)00041-0Search in Google Scholar

Received: 2002-06-01
Published Online: 2022-02-15

© 2002 Carl Hanser Verlag, München

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