Detail publikace

Analysis of breakout of concast steel slab via criteria of similarity

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

Originální název

Analysis of breakout of concast steel slab via criteria of similarity

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

The so called secondary cooling zone is an important part of the CCM. In this zone a breakout may occur due to an increase of the local and temperature heterogeneity of steel, due to an increase of the stress caused by bending of the slab and by high local concentration of non-metallic slag inclusions. Changes of the chemical composition of the steel during continuous casting are particularly dangerous. In the event that two melts are cast one right after another, i.e. if the melt of the steel with chemical composition A ends and it is immediately followed by the steel B, it may automatically stop the CCM and an atypical breakout may take place. With use of dimensional analysis altogether 8 criteria of similarity were derived according to the PI-theorem. Important data in temperature field of the slab were calculated by the original model. Numerical values of eight criteria were determined for the steels A and B. This application of the theory of physical similarity clearly proved markedly increased tendency of the steel B to breakouts in comparison with the steel A. In order to prevent repetition of this accident of caster for another pair of steels cast immediately one after another, it is necessary to assess the derived individual criteria of similarity for both steels and other operations with these criteria. The way to reduce the risk of breakouts may be found mainly in the change of thermo-physical properties of both steels, consisting primarily of reduction of differences of their chemical composition.

Klíčová slova

concast slab, chemical composition, heterogeneity, breakout

Autoři

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

Rok RIV

2013

Vydáno

15. 5. 2013

Nakladatel

Tanger

Místo

Ostrava

ISBN

978-80-87294-39-0

Kniha

METAL 2013 Conference Proceedings

Edice

1

Strany od

32

Strany do

33

Strany počet

2

BibTex

@inproceedings{BUT99734,
  author="František {Kavička} and Karel {Stránský} and Jana {Dobrovská} and Bohumil {Sekanina} and Josef {Štětina} and Miloš {Masarik}",
  title="Analysis of breakout of concast steel slab via criteria of similarity",
  booktitle="METAL 2013 Conference Proceedings",
  year="2013",
  series="1",
  pages="32--33",
  publisher="Tanger",
  address="Ostrava",
  isbn="978-80-87294-39-0"
}