Influence of casting speed on centerline porosity formation in continuously cast round steel billets
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F17%3A10237335" target="_blank" >RIV/61989100:27360/17:10237335 - isvavai.cz</a>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Influence of casting speed on centerline porosity formation in continuously cast round steel billets
Popis výsledku v původním jazyce
During continuous casting of steel, a centerline porosity formation frequently occurs and participates on decrease of internal quality of continuously cast billets. To avoid the centerline porosity formation, a description of casting parameters connection with centerline porosity is necessary. This paper is focused on study of casting speed influence on centerline porosity formation in continuously cast round steel billets through a numerical modelling. Centerline porosity formation is closely related with solidification of billet which can be affected by casting speed change. Usually, in real conditions, the change of casting speed includes a change of cooling conditions both in primary and secondary zone. For determination of influence of technological parameter on observed quantitative parameters of billet, only casting speed was changed during numerical modelling while keeping cooling intensity. With relation of casting speed changes, the attention was paid also on metallurgical length which effects centerline porosity formation. Metallurgical length shortening should lead to reduction of centerline porosity formation. In accordance with literature knowledge, the increasing of fraction solid due to decreasing of casting speed was confirmed. Fraction solid increasing was caused by increase of time which billet spent in cooling zones. Mentioned fact affected positively metallurgical length shortening. Centerline porosity was evaluated by liquid pressure in centerline region of billet. The porosity formation can be assumed at zero liquid pressure in centerline region. It was found out that with decrease of casting speed, the liquid pressure in centerline region increased. Thus, occurrence of centerline porosity decreases with decrease of casting speed.
Název v anglickém jazyce
Influence of casting speed on centerline porosity formation in continuously cast round steel billets
Popis výsledku anglicky
During continuous casting of steel, a centerline porosity formation frequently occurs and participates on decrease of internal quality of continuously cast billets. To avoid the centerline porosity formation, a description of casting parameters connection with centerline porosity is necessary. This paper is focused on study of casting speed influence on centerline porosity formation in continuously cast round steel billets through a numerical modelling. Centerline porosity formation is closely related with solidification of billet which can be affected by casting speed change. Usually, in real conditions, the change of casting speed includes a change of cooling conditions both in primary and secondary zone. For determination of influence of technological parameter on observed quantitative parameters of billet, only casting speed was changed during numerical modelling while keeping cooling intensity. With relation of casting speed changes, the attention was paid also on metallurgical length which effects centerline porosity formation. Metallurgical length shortening should lead to reduction of centerline porosity formation. In accordance with literature knowledge, the increasing of fraction solid due to decreasing of casting speed was confirmed. Fraction solid increasing was caused by increase of time which billet spent in cooling zones. Mentioned fact affected positively metallurgical length shortening. Centerline porosity was evaluated by liquid pressure in centerline region of billet. The porosity formation can be assumed at zero liquid pressure in centerline region. It was found out that with decrease of casting speed, the liquid pressure in centerline region increased. Thus, occurrence of centerline porosity decreases with decrease of casting speed.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
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OECD FORD obor
20501 - Materials engineering
Návaznosti výsledku
Projekt
<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
METAL 2017: conference proceedings : 26th International Conference on Metallurgy and Materials : (reviewed version) : May 24th-26th 2017, Hotel Voroněž I, Brno, Czech Republic, EU
ISBN
978-80-87294-79-6
ISSN
—
e-ISSN
—
Počet stran výsledku
6
Strana od-do
235-240
Název nakladatele
Tanger
Místo vydání
Ostrava
Místo konání akce
Brno
Datum konání akce
24. 5. 2017
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
000434346900033