Ca-Behandlung bei Si-freien Stahlgüten

Translated title of the contribution: Ca-treatment on Si-free steel grades

Daniel René Ramaseder

Research output: ThesisMaster's Thesis


Ca-treatment is an important aid to avoid clogging and to modify sulphides. The leading Austrian steel producer voestalpine Stahl GMBH in Linz treats Si-alloyed steel with CaSi wire to reduce the sulphur content in steel grades for gas tubes. Due to steadily increasing quality demands sulphide and oxide inclusions steels for galvanized hot-rolled strip have also to be modified. This type of steel grades is Si-free in order to guarantee the zinc coating adherence. This excludes CaSi wire for the Ca-treatment. An alternative to CaSi is CaFe wire. The aim of this work is to investigate the role of two different CaFe wires in the production of Si-free hot-rolled strip steel grades in theory and under industrial scale conditions. Main content of the practical work is the investigation of the Ca-treatment on the steel composition during and after ladle treatment, the recovery of the fed Calcium wire and the influence of the Ca-treatment on the modification of the non-metallic inclusions in the hot rolled band.
Translated title of the contributionCa-treatment on Si-free steel grades
Original languageGerman
  • Egger, Martin Wilhelm, Supervisor (external)
  • Bernhard, Christian, Supervisor (internal)
Award date17 Dec 2010
Publication statusPublished - 2010

Bibliographical note

embargoed until 16-11-2015


  • Ca-treatment
  • sulphide modification
  • CaFe
  • steel cleanliness

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