Detail publikačního výsledku

State of the art of metal reoxidation study of iron castings

ELBEL, T.; ŠENBERGER, J.; ZÁDĚRA, A.; VLADÍK, R.

Original Title

State of the art of metal reoxidation study of iron castings

English Title

State of the art of metal reoxidation study of iron castings

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

Metal reoxidation causes a number of iron castings defects, particularly when pouring them in green-sand moulds. One of them is pinholes the occurrence of which is explained by several hypotheses. One of possible causes is reoxidation processes in the foundry mould cavity. During its flowing in the gating system and in the mould cavity the liquid metal gets into contact with oxygen from air and water vapour. Secondary oxidation of elements takes place in sequence of their affinity to oxygen. Therefore the authors were aimed at cast irons. Besides indirect methods the reoxidation was researched mainly by direct measurement of oxygen activity during filling of a mould up to solidus temperature. Continuous monitoring of oxygen activity changes in a foundry mould is an original solution since other authors have done their measurements only in a furnace with disposable sensors. Obtained results have confirmed that oxygen activity measurement can serve to the casting quality control. But it is little sensitive for explanation of processes running in a cavity during metal casting.

English abstract

Metal reoxidation causes a number of iron castings defects, particularly when pouring them in green-sand moulds. One of them is pinholes the occurrence of which is explained by several hypotheses. One of possible causes is reoxidation processes in the foundry mould cavity. During its flowing in the gating system and in the mould cavity the liquid metal gets into contact with oxygen from air and water vapour. Secondary oxidation of elements takes place in sequence of their affinity to oxygen. Therefore the authors were aimed at cast irons. Besides indirect methods the reoxidation was researched mainly by direct measurement of oxygen activity during filling of a mould up to solidus temperature. Continuous monitoring of oxygen activity changes in a foundry mould is an original solution since other authors have done their measurements only in a furnace with disposable sensors. Obtained results have confirmed that oxygen activity measurement can serve to the casting quality control. But it is little sensitive for explanation of processes running in a cavity during metal casting.

Keywords

metal reoxidation, oxygen activity measurements, iron castings

Key words in English

metal reoxidation, oxygen activity measurements, iron castings

Authors

ELBEL, T.; ŠENBERGER, J.; ZÁDĚRA, A.; VLADÍK, R.

Released

15.11.2007

ISBN

1897-2764

Periodical

Archives of materials Science and Engineering

Volume

28

Number

11

State

Republic of Poland

Pages from

649

Pages to

652

Pages count

4

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@article{BUT43957,
  author="Tomáš {Elbel} and Jaroslav {Šenberger} and Antonín {Záděra} and Radoslav {Vladík}",
  title="State of the art of metal reoxidation study of iron castings",
  journal="Archives of materials Science and Engineering",
  year="2007",
  volume="28",
  number="11",
  pages="649--652",
  issn="1897-2764"
}