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INFLUENCE OF CHEMICAL CONTENT OF STEELS ON THE MS AND MF TEMPERATURES

1 Rusz Stanislav
Co-authors:
1 Schindler Ivo 2 DÄNEMARK Janusz 1 Kawulok Petr 1 Kawulok Rostislav 1 Opěla Petr
Institutions:
1 VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Ostrava, Czech Republic, EU, stanislav.rusz2@vsb.cz, ivo.schindler@vsb.cz, petr.kawulok@vsb.cz, rostislav.kawulok@vsb.cz, petr.opela@vsb.cz
2 Třinecké železárny, a.s., Třinec, Czech Republic, EU, janusz.danemark@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:
470-474
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:
493 views / 859 downloads
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Abstract

5 types of steel, which were differently alloyed with chromium, molybdenum and nickel, were examined. Determination of the temperatures martensite start temperature (Ms) and martensite finish (Mf) was performed by dilatometer with the use of the plastometer GLEEBLE 3800 and relevant CCT evaluation software. In all the steels alloyed with chromium and optionally with molybdenum it was possible to graphically localise the temperature, at which the curves Ms and Mf meet. The addition of nickel dramatically changes the situation, because at low cooling rates the martensitic area is very smoothly followed by bainitic region and determination of their boundaries is difficult. Determination of the temperatures Ms and Mf is important for the exact setting of refinement processes.

Keywords: Dilatometric test, Gleeble 3800, martensitic transformation temperature

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