Analysis of breakout of concast steel slab via criteria of similarity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F13%3APU103686" target="_blank" >RIV/00216305:26210/13:PU103686 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Analysis of breakout of concast steel slab via criteria of similarity

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

—

Project

<a href="/en/project/GAP107%2F11%2F1566" target="_blank" >GAP107/11/1566: Analysis of influence of metallurgical-material and technological parameters of concast steel blanks on their quality and process stability</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

METAL 2013 Conference Proceedings

ISBN

978-80-87294-39-0

ISSN

—

e-ISSN

—

Number of pages

2

Pages from-to

32-33

Publisher name

Tanger

Place of publication

Ostrava

Event location

Brno

Event date

May 15, 2013

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—