Publication detail

Experimentální ověření modelu reoxidace

ZÁDĚRA, A. KRUTIŠ, V. ŠENBERGER, J. KOVÁČ, M. KOLDA, V.

Original Title

Experimentální ověření modelu reoxidace

English Title

EXPERIMENTAL VERIFICATION OF A MODEL OF STEEL REOXIDATION

Type

journal article - other

Language

Czech

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.

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

ocelové odlitky, sekundární oxidace, aktivita kyslíku

Key words in English

steel casting, secondary oxidation, oxygen activity

Authors

ZÁDĚRA, A.; KRUTIŠ, V.; ŠENBERGER, J.; KOVÁČ, M.; KOLDA, V.

RIV year

2009

Released

18. 4. 2009

Publisher

Vysoká škola báňská - TU Ostrava

Location

Ostrava

ISBN

1210-0471

Periodical

Transaction of the VŠB-Technical university of Ostrava, Mechanical series

Year of study

52

Number

2

State

Czech Republic

Pages from

355

Pages to

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",
  pages="355--362",
  issn="1210-0471"
}