Analysis of the Surface Quality of Steel Bars with Use of Approximation Models

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25870807%3A_____%2F16%3AN0000025" target="_blank" >RIV/25870807:_____/16:N0000025 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.hutnickelisty.cz" target="_blank" >http://www.hutnickelisty.cz</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of the Surface Quality of Steel Bars with Use of Approximation Models

Popis výsledku v původním jazyce

The article contains an analysis of the behaviour of the basic indicator of surface quality of bars on the basis of created physically adequate model describing heat and temperature conditions during casting of billets. On the basis of simplified physical interpretation an approximating dynamic cybernetic model was created for the measured surface temperature of cast billets, then from it a mathematical continuous and discrete model was created, and finally a regression model. Since the indicator of the surface quality of bars shows the character of probability of occurrence of the phenomenon, a multiple logistic regression model was used. For verification of appropriateness of the model we selected data from annealing of concrete operational heat of killed steel containing 0.18 wt. % C, 1.32 wt. % Mn and 0.33 wt. % Si at the outer casting strand No. 8 of the continuous casting machine No. 2 at the Trinec Iron and Steel Works, a.s., as well as from rolling of square billets of 150 150 mm to round bars with diameter of 70 mm on the continuous fine section rolling mill.

Název v anglickém jazyce

Analysis of the Surface Quality of Steel Bars with Use of Approximation Models

Popis výsledku anglicky

The article contains an analysis of the behaviour of the basic indicator of surface quality of bars on the basis of created physically adequate model describing heat and temperature conditions during casting of billets. On the basis of simplified physical interpretation an approximating dynamic cybernetic model was created for the measured surface temperature of cast billets, then from it a mathematical continuous and discrete model was created, and finally a regression model. Since the indicator of the surface quality of bars shows the character of probability of occurrence of the phenomenon, a multiple logistic regression model was used. For verification of appropriateness of the model we selected data from annealing of concrete operational heat of killed steel containing 0.18 wt. % C, 1.32 wt. % Mn and 0.33 wt. % Si at the outer casting strand No. 8 of the continuous casting machine No. 2 at the Trinec Iron and Steel Works, a.s., as well as from rolling of square billets of 150 150 mm to round bars with diameter of 70 mm on the continuous fine section rolling mill.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Hutnické listy

ISSN

0018-8069

e-ISSN

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Svazek periodika

LXIX

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

7

Strana od-do

3-9

Kód UT WoS článku

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EID výsledku v databázi Scopus

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