Publication detail
IMPACT OF OXIDE SCALE ON HEAT TREATMENT OF STEELS
RAUDENSKÝ, M. CHABIČOVSKÝ, M. HRABOVSKÝ, J.
Czech title
Vliv vrstvy okují na tepelné zpracování ocelí
English title
IMPACT OF OXIDE SCALE ON HEAT TREATMENT OF STEELS
Type
conference paper
Language
en
Original abstract
Oxidation is an inherent aspect of steel production and heat treatment. Oxide scale layers commonly impact surface quality and material loss during steel processing. This paper is focused on the study of the influence of the oxide layer on cooling intensity. Spray cooling of a hot steel surface is considered. Typical examples are secondary cooling in continuous casting, interstand and run-out table cooling at hot rolling, and heat treatment and other metallurgical processes where controlled temperature regimes are required. Cooling intensity is primarily affected by spray parameters such as pressure and coolant impingement density. Though not frequently reported, even thin layers of oxides can significantly modify cooling intensity. This effect is prevalent when cooling steel surfaces at high surface temperatures. The influence of oxide scale layers on cooling intensity was studied using experimental measurements and numerical analysis. Experimental measurements compare the cooling of scale-free surfaces and oxidized surfaces. Experimental investigations show a difference in the cooling intensity. Numerical analyses were prepared to simulate sample cooling with different oxide scale layers and thermal conductivity. Even a scale layer of several microns can significantly modify the cooling intensity.
Czech abstract
Oxidace (tvorba okují) je neodmyslitelnou součástí výroby oceli a tepelného zpracování oceli. Vrstva okují ovlivňuje kvalitu povrchu a má též za následek úbytek materiálu při procesu výroby oceli. Tento článek se zabývá vlivem vrstvy okují na intenzitu chlazení při sprchovém chlazení. Typickými příklady jsou sekundární chlazení při kontinuálním odlévání oceli, mezistolicové chlazení při válcování za tepla a tepelné zpracování či jiné metalurgické procesy při kterých je třeba dodržovat teplotní režimy. Intensita chlazení je primárně ovlivňována parametry sprchového chlazení, jako je tlak a hustota dopadající vody. Ačkoli se v literatuře téměř nezmiňuje tak i tenká vrstva okují může významně ovlivnit intensitu chlazení. Toto je převládající při chlazení ocelových povrchů za vysokých teplot. Vliv vrstvy okují na intensitu chlazení byl studován experimentálně a za pomocí numerické simulace. Experimentální měření porovnává chlazení nezokujeného a zokujeného povrchu. Experimentální měření ukázalo rozdíl v chladících intenzitách. Numerická simulace studovala chlazení s různou tloušťkou vrstvy okují a různou vodivostí vrstvy okují.
English abstract
Oxidation is an inherent aspect of steel production and heat treatment. Oxide scale layers commonly impact surface quality and material loss during steel processing. This paper is focused on the study of the influence of the oxide layer on cooling intensity. Spray cooling of a hot steel surface is considered. Typical examples are secondary cooling in continuous casting, interstand and run-out table cooling at hot rolling, and heat treatment and other metallurgical processes where controlled temperature regimes are required. Cooling intensity is primarily affected by spray parameters such as pressure and coolant impingement density. Though not frequently reported, even thin layers of oxides can significantly modify cooling intensity. This effect is prevalent when cooling steel surfaces at high surface temperatures. The influence of oxide scale layers on cooling intensity was studied using experimental measurements and numerical analysis. Experimental measurements compare the cooling of scale-free surfaces and oxidized surfaces. Experimental investigations show a difference in the cooling intensity. Numerical analyses were prepared to simulate sample cooling with different oxide scale layers and thermal conductivity. Even a scale layer of several microns can significantly modify the cooling intensity.
Keywords in Czech
okuje, oxidy, Leidenfrostova teplota, sprchové chlazení, intensita chlazení
Keywords in English
scale, oxide, Leidenfrost temperature, spray cooling, cooling intensity
RIV year
2014
Released
21.05.2014
Publisher
Tanger Ltd.
Location
Ostrava
ISBN
978-80-87294-54-3
ISSN
NEUVEDENO
Book
METAL 2014, 23rd International Conference on Metallurgy and Materials, Conference Proceedings
Pages from–to
553–558
Pages count
6
BIBTEX
@inproceedings{BUT107767,
author="Miroslav {Raudenský} and Martin {Chabičovský} and Jozef {Hrabovský},
title="IMPACT OF OXIDE SCALE ON HEAT TREATMENT OF STEELS",
booktitle="METAL 2014, 23rd International Conference on Metallurgy and Materials, Conference Proceedings",
year="2014",
month="May",
pages="553--558",
publisher="Tanger Ltd.",
address="Ostrava",
isbn="978-80-87294-54-3",
issn="NEUVEDENO"
}