Detail publikace

Contribution to Deoxidation of Austenitic Steels in a Vacuum Induction Furnace with Carbon

ŠENBERGER, J. PERNICA, V.

Originální název

Contribution to Deoxidation of Austenitic Steels in a Vacuum Induction Furnace with Carbon

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Deoxidation of steel with carbon under reduced pressure is often used for increasing the steel purity. Suitable units for this purpose in foundries are vacuum induction furnaces. Possibilities of increasing the steel purity by deoxidation with carbon in the vacuum induction furnace were studied for the steel for the petrochemistry of specific composition 25Cr/35Ni. The charge composed of the return material only was melted in the air. During melting the charge oxidized and the oxidizing slag formed. Chemical composition of steel, morphology, chemical composition of inclusions in the steel and chemical composition of slag after vacuuming were studied on the basis of samples taken before and after vacuuming. Temperature and oxygen activity were measured before and after vacuuming. Globular inclusions with dominant content of silicon and manganese were observed in steel before and after vacuuming. Contents of total oxygen in steel didn’t change significantly during vacuuming. On the basis of composition of inclusions and measured oxygen activity the activity of Cr2O3 in inclusions was calculated. A slag sample was taken after vacuuming and equilibrium oxygen activity in steel with regard to the Cr2O3 content in the slag was estimated from the slag composition. Equilibrium oxygen activity in relation to the Cr2O3 content in the slag was higher than equilibrium activity measured in the steel. For this reason it is not possible, under the studied conditions, to decrease oxygen content in steel during vacuuming.

Klíčová slova

Vacuum induction furnace, Deoxidation with carbon, Steel for petrochemistry, Oxygen activity, Total oxygen

Autoři

ŠENBERGER, J.; PERNICA, V.

Rok RIV

2015

Vydáno

23. 4. 2015

Nakladatel

Polish Academy of Sciences

Místo

Katowice-Gliwice

ISSN

1897-3310

Periodikum

Archives of foundry engineering

Ročník

15

Číslo

2

Stát

Polská republika

Strany od

105

Strany do

109

Strany počet

5

URL

http://www.afe.polsl.pl/index.php/pl/4101/contribution-to-deoxidation-of-austenitic-steels-in-a-vacuum-induction-furnace-with-carbon.pdf

BibTex

@article{BUT120442,
  author="Jaroslav {Šenberger} and Vítězslav {Pernica}",
  title="Contribution to Deoxidation of Austenitic Steels in a Vacuum Induction Furnace with Carbon
",
  journal="Archives of foundry engineering",
  year="2015",
  volume="15",
  number="2",
  pages="105--109",
  doi="10.1515/afe-2015-0048",
  issn="1897-3310",
  url="http://www.afe.polsl.pl/index.php/pl/4101/contribution-to-deoxidation-of-austenitic-steels-in-a-vacuum-induction-furnace-with-carbon.pdf"
}