In-line heat treatment of flat products

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU119132" target="_blank" >RIV/00216305:26210/16:PU119132 - 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

In-line heat treatment of flat products

Popis výsledku v původním jazyce

An in-line heat treatment of rolled materials is becoming frequently used by hot rolling plants. This method achieves the required material structure without the necessity of reheating. This paper describes a design procedure of spray cooling sections for obtaining demanded structure and mechanical properties of steel flat products. The design involves several important parts. First, it is necessary to obtain boundary conditions for the numerical model. Several types of nozzles are tested and dependences of the heat transfer coefficient on the surface temperature are obtained. After that, the cooling process is simulated using obtained boundary conditions. The required cooling regime and appropriate type and size of nozzles are selected with the knowledge of the CCT diagram and simulations results. The selected heat treatment regime is then validated on the small sample quenching test. The regime is modified if it is necessary. Finally, the full scale sample is heat treated on the new experimental stand which was developed at the Brno University of Technology. This experimental stand allows cooling of the moveable sample by two types of nozzles. First, it is cooled by intensive spray for short time period and then it is cooled by soft spray. The stand is able to stop the cooling and temper the sample. This paper presents laboratory results of the heat treatment of S355 steel which was spray quenched and self-tempered (the hot core tempers the quenched outer part) at the temperature 600 °C.

Název v anglickém jazyce

In-line heat treatment of flat products

Popis výsledku anglicky

An in-line heat treatment of rolled materials is becoming frequently used by hot rolling plants. This method achieves the required material structure without the necessity of reheating. This paper describes a design procedure of spray cooling sections for obtaining demanded structure and mechanical properties of steel flat products. The design involves several important parts. First, it is necessary to obtain boundary conditions for the numerical model. Several types of nozzles are tested and dependences of the heat transfer coefficient on the surface temperature are obtained. After that, the cooling process is simulated using obtained boundary conditions. The required cooling regime and appropriate type and size of nozzles are selected with the knowledge of the CCT diagram and simulations results. The selected heat treatment regime is then validated on the small sample quenching test. The regime is modified if it is necessary. Finally, the full scale sample is heat treated on the new experimental stand which was developed at the Brno University of Technology. This experimental stand allows cooling of the moveable sample by two types of nozzles. First, it is cooled by intensive spray for short time period and then it is cooled by soft spray. The stand is able to stop the cooling and temper the sample. This paper presents laboratory results of the heat treatment of S355 steel which was spray quenched and self-tempered (the hot core tempers the quenched outer part) at the temperature 600 °C.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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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

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings European Conference on Heat Treatment 2016 and 3rd International Conference on Heat Treatment and Surface Engineering in Automotive Applications, 11 – 13 May 2016, Prague, Czech Republic

ISBN

978-80-904462-9-8

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

Asociace pro tepelné zpracování kovů

Místo vydání

Čerčany

Místo konání akce

Praha

Datum konání akce

11. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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