INFLUENCE OF HEATING RATE ON THE LIQUIDUS TEMPERATURE MEASURED BY DTA METHOD FOR FECCR BASED SYSTEMS

1,2 ZLÁ Simona
Co-authors:
1 KAWULOKOVÁ Monika 1 DROZDOVÁ Ľubomíra 1,2 SMETANA Bedřich 1,2 DOBROVSKÁ Jana 1,2 VONTOROVÁ Jiřina 1,2 VÁŇOVÁ Petra 1 JANALÍKOVÁ Veronika
Institutions:
1 VŠB-TUO, Faculty of Metallurgy and Materials Engineering (FMME), Ostrava, Czech Republic, EU, simona.zla@vsb.cz
2 Regional Materials Science and Technology Centre (RMSTC), simona.zla@vsb.cz
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
139-144
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
49 views / 23 downloads
Abstract

This paper deals with the influence of the experimental conditions settings of the chosen DTA method on obtained data. The article is focused on the study of heating rate effect on shifting of liquidus temperature (TL) of Fe-CCr based systems (steels). Heating rate belongs to the frequently and easily changing parameter and its influence on the obtained data is substantial. DTA measurements were realised using the SETARAM Setsys 18TM laboratory system. The samples (steels) were analysed at selected controlled heating rates (1, 2, 5, 10 and 20 K / min). It has been found that the value of liquidus temperature shifted with the increasing heating rate towards to the higher values and this dependence was expressed. Application of obtained results can substantially contribute to minimising the influence of the used heating rate mode on the liquidus and enables an extrapolation to the so called "zero" heating rate. It is thus possible to obtain for the investigated systems the liquidus temperatures close to the equilibrium temperatures without necessity of making set of experimental measurements, which is highly time-consuming.

Keywords: DTA, heating rate, liquidus temperature, steel
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