Publication detail

Heterogeneity of Continuously Cast Steel Slab Shortly Before Breakout

STRÁNSKÝ, K. DOBROVSKÁ, J. KAVIČKA, F. SEKANINA, B. ŠTĚTINA, J.

Original Title

Heterogeneity of Continuously Cast Steel Slab Shortly Before Breakout

Type

conference paper

Language

English

Original Abstract

The paper presents heterogeneous chemical composition of the steel slab, which was determined during short-time operation of continuous casting machine after flying tundish change. Before this exchange the steel A was cast (0.41 wt.% C and 0.95 wt.% Cr), shortly after the exchange continuous casting of the steel B (0.17 wt.% C and 0.70 wt.% Cr) started. After 20 minutes the continuous casting machine automatically stopped, because in the straightening zone, between the 7th and the 8th segment a breakout had occurred. Part of the slab was taken from the place of breakout for more precise determination of the position of breakout. It served also for taking the test samples for analysis of local chemical composition. It was expected that basic information on chemical heterogeneity of both steels A and B will be obtained, as well as information on exchange of mass between these two steels, which occurred some 20 minutes before stopping of the continuous casting machine. The reason was that structural state of both steels contained at the moment of breakout both solid and liquid phases. Intermixing zone enabled comparatively rapid mixing of masses of both steels A and B. Apart from obtaining basic experimental concept of chemical heterogeneity of continuous cast slab connected with breakout it was expected that it would be possible to make a semi quantitative evaluation of the extent of mixing of both melts A and B in this very short time interval.

Keywords

concast slab, chemical composition, heterogeneity, breakout

Authors

STRÁNSKÝ, K.; DOBROVSKÁ, J.; KAVIČKA, F.; SEKANINA, B.; ŠTĚTINA, J.

RIV year

2012

Released

23. 5. 2012

Publisher

Tanger

Location

Ostrava

ISBN

978-80-87294-31-4

Book

METAL 2012 Conference proceedingd (CD-ROM)

Edition

1

Pages from

148

Pages to

153

Pages count

6

BibTex

@inproceedings{BUT94416,
  author="Karel {Stránský} and Jana {Dobrovská} and František {Kavička} and Bohumil {Sekanina} and Josef {Štětina}",
  title="Heterogeneity of Continuously Cast Steel Slab Shortly Before Breakout",
  booktitle="METAL 2012 Conference proceedingd (CD-ROM)",
  year="2012",
  series="1",
  pages="148--153",
  publisher="Tanger",
  address="Ostrava",
  isbn="978-80-87294-31-4"
}