Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls
When regarding as-cast microstructures of highly alloyed metals, microsegregation of alloying elements is a common feature resulting from non-equilibrium conditions during solidification. The aim of this work is to predict the occurrence and severity of microsegregation in highly alloyed, centrifuga...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2018-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391700031K.pdf |
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| author | Klančnik U. Košec B. Mrvar P. Medved J. |
| author_facet | Klančnik U. Košec B. Mrvar P. Medved J. |
| author_sort | Klančnik U. |
| collection | DOAJ |
| description | When regarding as-cast microstructures of highly alloyed metals, microsegregation of alloying elements is a common feature resulting from non-equilibrium conditions during solidification. The aim of this work is to predict the occurrence and severity of microsegregation in highly alloyed, centrifugally cast high speed steel used for rolls. The prediction was performed using thermodynamic Scheil-Gulliver modelling with Thermo-Calc software. The modelled predictions were then compared with differential scanning calorimetry, X-ray diffraction, light and electron microscopy with energy dispersive spectroscopy, all performed on an as-cast roll shell. Results show that chromium, molybdenum and vanadium have the highest tendency to microsegregation. Vanadium tends to form negative microsegregation, while molybdenum and chromium form positive microsegregation. Scanning electron microscopy revealed the presence of complex eutectic carbides, confirming the Scheil-Gulliver non-equilibrium solidification path via two main successive eutectic reactions. |
| format | Article |
| id | doaj-art-d98617ed2f8c47c48c2436b363703925 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-d98617ed2f8c47c48c2436b3637039252025-02-02T03:17:20ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752018-01-01541596610.2298/JMMB170109031K1450-53391700031KNon-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rollsKlančnik U.0Košec B.1Mrvar P.2Medved J.3Valji, d.o.o., Štore, SloveniaValji, d.o.o., Štore, SloveniaUniversity of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and Metallurgy, Ljubljana, SloveniaUniversity of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and Metallurgy, Ljubljana, SloveniaWhen regarding as-cast microstructures of highly alloyed metals, microsegregation of alloying elements is a common feature resulting from non-equilibrium conditions during solidification. The aim of this work is to predict the occurrence and severity of microsegregation in highly alloyed, centrifugally cast high speed steel used for rolls. The prediction was performed using thermodynamic Scheil-Gulliver modelling with Thermo-Calc software. The modelled predictions were then compared with differential scanning calorimetry, X-ray diffraction, light and electron microscopy with energy dispersive spectroscopy, all performed on an as-cast roll shell. Results show that chromium, molybdenum and vanadium have the highest tendency to microsegregation. Vanadium tends to form negative microsegregation, while molybdenum and chromium form positive microsegregation. Scanning electron microscopy revealed the presence of complex eutectic carbides, confirming the Scheil-Gulliver non-equilibrium solidification path via two main successive eutectic reactions.http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391700031K.pdfmicrosegregationhigh speed steelScheil-Gulliver modeldifferential scanning calorimetry |
| spellingShingle | Klančnik U. Košec B. Mrvar P. Medved J. Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls Journal of Mining and Metallurgy. Section B: Metallurgy microsegregation high speed steel Scheil-Gulliver model differential scanning calorimetry |
| title | Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls |
| title_full | Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls |
| title_fullStr | Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls |
| title_full_unstemmed | Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls |
| title_short | Non-equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls |
| title_sort | non equilibrium solidification and microsegregation in centrifugally cast high speed steel for rolls |
| topic | microsegregation high speed steel Scheil-Gulliver model differential scanning calorimetry |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391700031K.pdf |
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