Einfluss der Abkühlbedingungen auf die Bildung von Oberflächenrissen beim Stranggießen eines Nb - mikrolegierten Stahls

Translated title of the contribution: Influence of the cooling conditions on the formation of surface cracks in the continuous casting of a Nb - microalloyed steel

Roman Krobath

Research output: ThesisMaster's Thesis

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Abstract

This work describes a new test method for the experimental simulation of surface cracking during continuous casting. The IMC-B (In-Situ Material Characterisation - Bending) test ena-bles the investigation of samples which are formed straight from the liquid steel and are cooled to a bending temperature with defined cooling conditions. Afterwards, a 3 - point bending test is carried out, in which the sample is deformed at a constant temperature with defined strain rate and maximum strain. The first series of tests deals with the investigation of the second ductility trough of a Nb - microalloyed steel (straightening zone in continuous casting). Two different cooling strategies are simulated. The experiments are performed with different cooling conditions, bending temperatures and maximum strains. Finally the samples are subjected to metallographic examinations and the results are presented related to the cooling curves, detected surface cracks and differences in the microstructure.
Translated title of the contributionInfluence of the cooling conditions on the formation of surface cracks in the continuous casting of a Nb - microalloyed steel
Original languageGerman
QualificationDipl.-Ing.
Supervisors/Advisors
  • Krajewski, Pawel, Co-Supervisor (internal)
  • Bernhard, Christian, Supervisor (internal)
Award date19 Dec 2014
Publication statusPublished - 2014

Bibliographical note

embargoed until 08-12-2019

Keywords

  • continuous casting
  • surface cracks

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