EFFECT OF THE SPEED OF FEEDSTOCK ON HEAT TRANSFER COEFFICIENT DURING DESCALING IN HOT ROLLING

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F17%3APU124004" target="_blank" >RIV/00216305:26210/17:PU124004 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

EFFECT OF THE SPEED OF FEEDSTOCK ON HEAT TRANSFER COEFFICIENT DURING DESCALING IN HOT ROLLING

Popis výsledku v původním jazyce

Hydraulic descaling is essential to obtaining a high-quality surface in hot-rolled steel. Descaling removes mill scales (mainly iron oxides) from the surface using high-performance water jets which break the structure of the scales and washes them off the steel strip. The strip is then hot rolled. The speed of the feedstock in a mill directly affects the productivity of the line but can negatively affect the surface quality of the rolled steel, since part of the surface may not be descaled properly if the feedstock moves too quickly. Descaling itself combines both mechanical and thermal effects. The available literature attributes merits to both types of effect, and both are always present in the process. The process of descaling was examined in experiments with a standard descaling nozzle for speeds from 0.1 m/s to 2 m/s. The position-dependent values were computed by an inverse task and the heat transfer coefficient was obtained. The experiment with the slowest speed showed a very intense and relatively long-lasting cooling. A change of cooling regime was observed for speeds up to 0.5 m/s, where the average heat transfer coefficient gradually decreased with the speed. The article summarizes these findings and gives insight into various aspects of the hot rolling process.

Název v anglickém jazyce

EFFECT OF THE SPEED OF FEEDSTOCK ON HEAT TRANSFER COEFFICIENT DURING DESCALING IN HOT ROLLING

Popis výsledku anglicky

Hydraulic descaling is essential to obtaining a high-quality surface in hot-rolled steel. Descaling removes mill scales (mainly iron oxides) from the surface using high-performance water jets which break the structure of the scales and washes them off the steel strip. The strip is then hot rolled. The speed of the feedstock in a mill directly affects the productivity of the line but can negatively affect the surface quality of the rolled steel, since part of the surface may not be descaled properly if the feedstock moves too quickly. Descaling itself combines both mechanical and thermal effects. The available literature attributes merits to both types of effect, and both are always present in the process. The process of descaling was examined in experiments with a standard descaling nozzle for speeds from 0.1 m/s to 2 m/s. The position-dependent values were computed by an inverse task and the heat transfer coefficient was obtained. The experiment with the slowest speed showed a very intense and relatively long-lasting cooling. A change of cooling regime was observed for speeds up to 0.5 m/s, where the average heat transfer coefficient gradually decreased with the speed. The article summarizes these findings and gives insight into various aspects of the hot rolling process.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Sborník konference METAL 2017

ISBN

978-80-87294-73-4

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

261-266

Název nakladatele

Tanger, Ostrava

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

24. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000434346900086