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STUDY OF KINETICS PHASE TRANSFORMATIONS AFTER PLASTIC DEFORMATION OF RAIL STEEL CLASS IH ALLOYED WITH CHROMIUM

1 KAWULOK Rostislav
Co-authors:
1 SCHINDLER Ivo 1 KAWULOK Petr 1 KAWULOK Vojtěch 2 PODOLÍNSKÝ Petr 2 KUREK Václav 1 RUSZ Stanislav 1 OPĚLA Petr
Institutions:
1 VSB - Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Ostrava, Czech Republic, EU rostislav.kawulok@vsb.cz, ivo.schindler@vsb.cz, petr.kawulok@vsb.cz, vojtech.kawulok.st@vsb.cz, stanislav.rusz2@vsb.cz, petr.opela@vsb.cz
2 TŘINECKÉ ŽELEZÁRNY, a. s., Třinec, Czech Republic, EU Petr.Podolinsky@trz.cz, Vaclav.Kurek@trz.cz
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
403-408
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
556 views / 326 downloads
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Abstract

The paper is aimed at evaluation of effect previous plastic deformation on transformation kinetics of rail steel class IH alloyed with chromium. The CCT and DCCT diagrams were assembled on the basis of dilatometric tests with and/or without an influence of the previous deformation. To the experiment execution the dilation module of the plastometer Gleeble 3800 was used. The Accuracy of the diagrams was faced with metallographic analysis and measurement of hardness. The obtained results were compared with the results of in-process measurement of rail rolling mill Třinecké železárny Inc. This confirmed the theory that in the case of steels which are intended for rolling rails, no influence of the previous deformation the crucial influence pearlitic transformation in terms of time, but in the case of higher cooling rate has deformation an appreciable effect on shift temperature intervals of pearlite formation.

Keywords: Rail steel, phase transformation of steel,CCT and DCCT diagrams, dilatometric tests, Gleeble 3800

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