Experimental verification and validation of the phase transformation model used for optimization of heat treatment of rails

Roman Kuziak¹, Ryszard Molenda¹, Andrzej Wrożyna¹, Jan Kusiak², Maciej Pietrzyk²

¹Institute for Ferrous Metallurgy, ul. K. Miarki 12, 44-100 Gliwice, Poland.
²AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland.

DOI:

https://doi.org/10.7494/cmms.2014.1.0475

Abstract:

Dilatometric tests for the eutectoid steel were performed and the results were used for identification of the phase transformation model for this steel. Physical simulations of controlled heat treatment of rail head were performed. Microstructure and properties after various thermal cycles were determined and these data were used to validate the model of controlled cooling of rails. As a consequence, a reliable model which predicts temperature field during cooling, kinetics of phase transformations, microstructural parameters and mechanical properties of the product was developed. This model can be applied to solve the optimization task formulated with the objective of searching for the cooling process parameters, which give as low as possible interlamellar spacing in pearlite, microstructure free of bainite and heterogeneous hardness distribution in the rail head.

Cite as:

Kuziak, R., Molenda, R., Wrożyna, A., Kusiak, J., & Pietrzyk, M. (2014). Experimental verification and validation of the phase transformation model used for optimization of heat treatment of rails. Computer Methods in Materials Science, 14(1), 53 – 63. https://doi.org/10.7494/cmms.2014.1.0475

Article (PDF):

Keywords:

Pearlitic steels, Rails, Controlled cooling, Modelling, Validation

Publication dates:

Received: 28.10.2012, accepted: 02.12.2012, published:

Publication type:

Original scientific paper

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