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INFLUENCE OF EXPERIMENTAL CONDITIONS OF THE DIRECT THERMAL ANALYSIS METHOD ON THE COURSE OF COOLING FOR SELECTED METALLIC SYSTEMS

1 GRYC Karel
Co-authors:
1 STROUHALOVÁ Michaela 2 SMETANA Bedřich 2 KAWULOKOVÁ Monika 2 ZLÁ Simona 1 MICHALEK Karel 2 KALUP Aleš
Institutions:
1 VŠB - Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Department of Metallurgy and Foundry, and Regional Materials Science and Technology Centre, Ostrava, Czech Republic, EU, karel.gryc@vsb.cz, michaela.strouhalova@vsb.cz, ladislav.socha@vsb.cz, karel.michalek@vsb.cz
2 VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Department of Physical Chemistry and Theory of Technological Processes, and Regional Materials Science and Technology Centre, Ostrava, Czech Republic, bedrich.smetana@vsb.cz, monika.kawulokova@vsb.cz, simona.zla@vsb.cz, ales.kalup@vsb.cz
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
123-128
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
466 views / 216 downloads
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Abstract

The paper is devoted to the study of the influence of experimental conditions of the direct thermal analysis method for use in high-temperature thermal analysis equipment Netzsch STA 449 F3 JUPITER during controlled cooling mode.The first part of the article is focused on monitoring of the effect of experimental conditions on the solidification point of the standard material nickel (a purity of 99.995 %) and the total shape of cooling curve. On the basis of experimental measurements, a deviation obtained by interpreting the cooling curves for various cooling rates (5; 10; 15 and 20 °C min-1) for nickel samples of various weights (5; 10; 15 and 20 g) from the generally recognized melting / solidification point of nickel (1455 °C) can be quantified.Besides the identification of the influence of experimental conditions on the temperature of solidification and the total cooling curve of nickel shape during solidification, the paper focuses attention on the mapping and interpreting the response found during the solidification of steel sample and the resulting to liquidus (TL) and solidus (TS) temperature of this steel. Findings from the discussion about the influence of experimental conditions on the solidification point of nickel and shape of cooling curve are implemented in a contribution to the method of identifying the solidus and liquidus temperature at selected real steel grades.

Keywords: nickel, steel, direct thermal analysis, cooling curve, solidification

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