Overcooling in overlap areas during hydraulic Descaling
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU119879" target="_blank" >RIV/00216305:26210/16:PU119879 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.17222/mit.2015.164" target="_blank" >http://dx.doi.org/10.17222/mit.2015.164</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17222/mit.2015.164" target="_blank" >10.17222/mit.2015.164</a>
Alternative languages
Result language
angličtina
Original language name
Overcooling in overlap areas during hydraulic Descaling
Original language description
The production and processing of high-quality grades of steel are connected with the oxidation at high temperatures. Unwanted scales are formed on the steel surface, which is usually heated to over 900 °C. These scales are often removed by hydraulic descaling during the production. In most cases where long, flat products are produced, one row of descaling nozzles is used. As these flat jet nozzles are arranged in a row, the water spray from one nozzle interferes with the spray from the neighboring nozzles. This zone is called an overlap area and often even more scales remain here after the descaling process. An increased amount of the scales left behind results in a lower quality of a final product. A typical configuration with an inclination and twist angle of 15° was studied. Heat-transfer coefficients (HTC) and surface temperatures were measured in the overlap area and compared with the values obtained from undisturbed areas. It was found that the overlap area is grossly overcooled. The results were compared with a new configuration, where the twist angle was changed to 0°, and it was found that the overcooling was significantly reduced. The temperature measurement showed that an increased thickness of the scales in the overlap area can also be caused by surface overcooling because the scales change the material properties with the temperature, and they are therefore more difficult to remove. The new configuration with the twist angle of 0° seems promising for improving the quality of hydraulic descaling.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materiali in tehnologije
ISSN
1580-2949
e-ISSN
1580-3414
Volume of the periodical
50
Issue of the periodical within the volume
4
Country of publishing house
SI - SLOVENIA
Number of pages
4
Pages from-to
575-578
UT code for WoS article
000381658000019
EID of the result in the Scopus database
2-s2.0-84983637813