Untersuchung der Auswirkung von Elektrodenqualität und Schlackenadditiven auf den Reinheitsgrad und den Energieverbrauch eines elektroschlacke umgeschmolzenen X38 CrMoV 5-1 Warmarbeitsstahles

Translated title of the contribution: An investigation about the effect of electrode quality and slag additives on the steel purity and the energy consumption of an electroslag remelted X38 CrMoV 5-1 hot-work tool steel

Patrick Kienesberger

Research output: ThesisMaster's Thesis

Abstract

Continuously rising demands to steel products increase the necessity of applying special melting techniques like electro-slag remelting (ESR). This process is mainly characterised by the remelting slag which influences not only the product's cleanliness but also the energy consumption of the ESR process. Consequently, the electric conductivity of the slag is gaining in importance. Nonetheless, the metallurgic features of the slag with regard to steel cleanliness improvement must not deteriorate with varying conductivities. The present work outlines the influence of electrode quality and slag on steel cleanliness and energy consumption. The examined steel was a X38 CrMoV 5-1 which was remelted in an open ESR process. In order the characterise the electric conductivity, standard slags with defined amounts of additives were analysed with an electric conductivity measuring unit at the Chair of the Metallurgy at the University of Leoben. Since the electric and chemical properties of the slags possibly change during remelting, they were tested before and after the remelting process. Additionally, the pool of the remelted blocks was analysed to show a potential influence of varying slag compositions on the solidification structure.
Translated title of the contributionAn investigation about the effect of electrode quality and slag additives on the steel purity and the energy consumption of an electroslag remelted X38 CrMoV 5-1 hot-work tool steel
Original languageGerman
QualificationDipl.-Ing.
Supervisors/Advisors
  • Schützenhöfer, Wolfgang, Co-Supervisor (external), External person
  • Krieger, Wilfried, Supervisor (internal)
  • Korp, Jörg, Co-Supervisor (internal)
Award date14 Dec 2007
Publication statusPublished - 2007

Bibliographical note

embargoed until null

Keywords

  • electoslag-remelting hot-work tool stell electric conductivity pool profile inclusion content

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