Descaling by Pulsating Water Jet

Kód výsledku v IS VaVaI

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RIV/00216305:26210/10:PU87018

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Descaling by Pulsating Water Jet

Popis výsledku v původním jazyce

Descaling is the process when scales are removed by water jet. In Academy of science in Ostrava, they have patented device called pulsator which can add to the water some extra energy in the form of high-frequency pressure pulses which disintegrate flat water jet. This paper deals with a new study of removing scales using pulsations and its comparison with descaling process without pulsating water jet. There are two main factors the thermal shock and the impact pressure applied by the impinging water onto the surface. During cold rolling is important only impact pressure. The descaling by pulsating water jet was also tested on the sheets generally used during cold rolling, because pulses create very short pressure peaks in the impact area higher than 300 MPa. While during the descaling without pulses is impact pressure approximately 1 - 5 MPa. Heat transfer and descaling tests were performed on carbon steel plate and steel sheet with a high percentage of silicon. Just these scales are very difficult for removing from the surface. It was found out that the pulsations have influence on the heat transfer and removing scales from the hot surfaces of steel. Tests for descaling on the cold sheets showed that the scale layer is thinner for the case of pulsating water jet with comparison to the scale thickness after descaling by the non pulsating water jet.

Název v anglickém jazyce

Descaling by Pulsating Water Jet

Popis výsledku anglicky

Descaling is the process when scales are removed by water jet. In Academy of science in Ostrava, they have patented device called pulsator which can add to the water some extra energy in the form of high-frequency pressure pulses which disintegrate flat water jet. This paper deals with a new study of removing scales using pulsations and its comparison with descaling process without pulsating water jet. There are two main factors the thermal shock and the impact pressure applied by the impinging water onto the surface. During cold rolling is important only impact pressure. The descaling by pulsating water jet was also tested on the sheets generally used during cold rolling, because pulses create very short pressure peaks in the impact area higher than 300 MPa. While during the descaling without pulses is impact pressure approximately 1 - 5 MPa. Heat transfer and descaling tests were performed on carbon steel plate and steel sheet with a high percentage of silicon. Just these scales are very difficult for removing from the surface. It was found out that the pulsations have influence on the heat transfer and removing scales from the hot surfaces of steel. Tests for descaling on the cold sheets showed that the scale layer is thinner for the case of pulsating water jet with comparison to the scale thickness after descaling by the non pulsating water jet.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2010, 19th International Conference on metallurgy and Materials

ISBN

978-80-87294-17-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

43-48

Název nakladatele

Tanger spol. s r.o.

Místo vydání

Rožnov pod Radhoštěm

Místo konání akce

Rožnov pod Radhočtěm

Datum konání akce

18. 5. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000286658700034