Publication detail
EXPERIMENTAL VERIFICATION OF A MODEL OF STEEL REOXIDATION
ZÁDĚRA, A. KRUTIŠ, V. ŠENBERGER, J. KOVÁČ, M. KOLDA, V.
Czech title
Experimentální ověření modelu reoxidace
English title
EXPERIMENTAL VERIFICATION OF A MODEL OF STEEL REOXIDATION
Type
journal article - other
Language
cs
Original abstract
Reoxidation of steel is a term for summary designation of secondary and tertiary oxidation of steel occurring during keeping the metal in a ladle after tapping it from a furnace and during casting in a mould cavity. During reoxidation the oxygen concentration and its activity in a casting are growing. In case that oxygen activity exceeds the equilibrium activity of oxygen with carbon the casting part or the whole casting can be afflicted with gas cavities of carbon monoxide. With higher oxygen activity the formations of oxides of elements with lower deoxidation ability (Mn, Si) continues. Those oxides can form in castings the extensive slaggy formations in their volume or on the casting surface designated as secondary slag inclusions. Thus the steel reoxidation directly influences surface and internal quality of steel castings and consequently the manufacturing costs too.
Czech abstract
Reoxidation of steel is a term for summary designation of secondary and tertiary oxidation of steel occurring during keeping the metal in a ladle after tapping it from a furnace and during casting in a mould cavity. During reoxidation the oxygen concentration and its activity in a casting are growing. In case that oxygen activity exceeds the equilibrium activity of oxygen with carbon the casting part or the whole casting can be afflicted with gas cavities of carbon monoxide. With higher oxygen activity the formations of oxides of elements with lower deoxidation ability (Mn, Si) continues. Those oxides can form in castings the extensive slaggy formations in their volume or on the casting surface designated as secondary slag inclusions. Thus the steel reoxidation directly influences surface and internal quality of steel castings and consequently the manufacturing costs too.
English abstract
Reoxidation of steel is a term for summary designation of secondary and tertiary oxidation of steel occurring during keeping the metal in a ladle after tapping it from a furnace and during casting in a mould cavity. During reoxidation the oxygen concentration and its activity in a casting are growing. In case that oxygen activity exceeds the equilibrium activity of oxygen with carbon the casting part or the whole casting can be afflicted with gas cavities of carbon monoxide. With higher oxygen activity the formations of oxides of elements with lower deoxidation ability (Mn, Si) continues. Those oxides can form in castings the extensive slaggy formations in their volume or on the casting surface designated as secondary slag inclusions. Thus the steel reoxidation directly influences surface and internal quality of steel castings and consequently the manufacturing costs too.
Keywords in Czech
ocelové odlitky, sekundární oxidace, aktivita kyslíku
Keywords in English
steel casting, secondary oxidation, oxygen activity
RIV year
2009
Released
18.04.2009
Publisher
Vysoká škola báňská - TU Ostrava
Location
Ostrava
ISSN
1210-0471
Journal
Transaction of the VŠB-Technical university of Ostrava, Mechanical series
Volume
52
Number
2
Pages from–to
355–362
Pages count
8
BIBTEX
@article{BUT49521,
author="Antonín {Záděra} and Vladimír {Krutiš} and Jaroslav {Šenberger} and Marek {Kováč} and Vlastimil {Kolda},
title="Experimentální ověření modelu reoxidace",
journal="Transaction of the VŠB-Technical university of Ostrava, Mechanical series",
year="2009",
volume="52",
number="2",
month="April",
pages="355--362",
publisher="Vysoká škola báňská - TU Ostrava",
address="Ostrava",
issn="1210-0471"
}