COMPARISON OF LIQUIDUS AND SOLIDUS TEMPERATURES OF CONTINUOUSLY CAST STEELS DETERMINED BY DIFFERENT THERMO-ANALYTICAL METHODS

1 GRYC Karel
Co-authors:
2 MICHALEK Karel 1 SOCHA Ladislav 2 STROUHALOVÁ Michaela 2 SMETANA Bedřich
Institutions:
1 The Institute of Technology and Business in České Budějovice, České Budějovice, Czech Republic, EU, gryc@mail.vstecb.cz
2 VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, karel.michalek@vsb.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
128-135
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
58 views / 31 downloads
Abstract

Thermo-analytical methods are commonly used for phase transformation temperature identification in a lot of science and industrial applications. Currently, there are most frequently methods based on very small samples analyses like a differential scanning calorimetry (DSC) and/or a differential thermal analysis (DTA) realised for various materials mostly in combination with a thermo-gravimetry (DSC/TG; DTA/TG respectively). The aim of such methods of tiny samples is to fit a transformation process without an influence of the sample mass and to get universal like conclusions. On the other hand, older direct thermal analytical method generally done on tens grams and larger samples are not so popular now excluding few applications regarding to cast iron and/or non-ferrous metals and their modifying process monitoring. However, simultaneous utilisation of both mentioned methods during determination of real steel liquidus (TL) and solidus (TS) temperatures leads to suppressing their individual disadvantages and enable to fit the results for such heterogeneous material like steel in the best possible way. The paper is focused on the discussion of TL and TS of 18 continuously cast steels analysed in the frame of No. LO1203 "Regional Materials Science and Technology Centre - Feasibility Program”. The submitted evaluation shows an importance of the parallel utilization of methods, accuracy and reproducibility of the results and also the deviations of the experimentally determined TL and TS and empirically calculated values of the industrial partner and values obtained by thermodynamic calculations.

Keywords: Steel, solidus temperature, liquidus temperature, thermal analysis, thermodynamic calculations
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