Perspective Material-Technological Process to Increase the Lifetime of the Blades of Hydraulic Machines

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00239497" target="_blank" >RIV/68407700:21220/15:00239497 - 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

Perspective Material-Technological Process to Increase the Lifetime of the Blades of Hydraulic Machines

Popis výsledku v původním jazyce

The paper deals with erosion influence which, besides to corrosion and cavitation, significantly contributes to failure of functioning parts of water turbines materials. The possibilities of material transformation or the application of a variety of surface treatments leading to an increased wear resistance, thus achieving a longer service life of the hydraulic turbine, are discussed here. Besides the traditional materials used in the manufacture of hydraulic turbines blades, (chrome-nickel corrosion resistant steel 1.4313 also marked as COR 13-4 and spheroidal graphite cast iron) materials whose parameters allow to assume a possibility of improving the wear resistance were evaluated as well. This includes Hardox 400, 1.4301 and 1.0570 type steels and spheroidal graphite cast iron in the state of ADI. The 1.0570 steel served as a base material for evaluation of HVOF spraying of polyurethane (PU) and the ceramic coating. The testing was carried out on a specially constructed test rig simulating erosive wear of the blades. Evaluation was made on the basis of the wear progress and measurements of the weight loss over time. From the subsequent evaluation of the worn surface quality using electron microscopy, the presence of cavitation wear accelerating the overall process of degradation was confirmed as well. Based on the performed tests it is possible to say that a suitable selection of materials or surface treatment can significantly improve the wear resistance. Overall lifetime prolongation of water turbines blades will depend on the superposition of all modes of wear, which are present in a specific case.

Název v anglickém jazyce

Perspective Material-Technological Process to Increase the Lifetime of the Blades of Hydraulic Machines

Popis výsledku anglicky

The paper deals with erosion influence which, besides to corrosion and cavitation, significantly contributes to failure of functioning parts of water turbines materials. The possibilities of material transformation or the application of a variety of surface treatments leading to an increased wear resistance, thus achieving a longer service life of the hydraulic turbine, are discussed here. Besides the traditional materials used in the manufacture of hydraulic turbines blades, (chrome-nickel corrosion resistant steel 1.4313 also marked as COR 13-4 and spheroidal graphite cast iron) materials whose parameters allow to assume a possibility of improving the wear resistance were evaluated as well. This includes Hardox 400, 1.4301 and 1.0570 type steels and spheroidal graphite cast iron in the state of ADI. The 1.0570 steel served as a base material for evaluation of HVOF spraying of polyurethane (PU) and the ceramic coating. The testing was carried out on a specially constructed test rig simulating erosive wear of the blades. Evaluation was made on the basis of the wear progress and measurements of the weight loss over time. From the subsequent evaluation of the worn surface quality using electron microscopy, the presence of cavitation wear accelerating the overall process of degradation was confirmed as well. Based on the performed tests it is possible to say that a suitable selection of materials or surface treatment can significantly improve the wear resistance. Overall lifetime prolongation of water turbines blades will depend on the superposition of all modes of wear, which are present in a specific case.

Druh

C - Kapitola v odborné knize

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/LO1207" target="_blank" >LO1207: Podpora udržitelnosti Inovačního centra diagnostiky a aplikace materiálů na ČVUT-FS v Praze</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

From Functionalized Nanostructures Towards Engineered Macrostructures

ISBN

978-80-88113-20-1

Počet stran výsledku

12

Strana od-do

119-130

Počet stran knihy

183

Název nakladatele

Epika

Místo vydání

Jindřichův Hradec

Kód UT WoS kapitoly

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