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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

C - Chapter in a specialist book

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

<a href="/en/project/LO1207" target="_blank" >LO1207: Support of Sustainability of the Innovation Centre of Diagnostics and Applications of Materials at CTU-FME in Prague</a><br>

Continuities

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

Publication year

2015

Confidentiality

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

Book/collection name

From Functionalized Nanostructures Towards Engineered Macrostructures

ISBN

978-80-88113-20-1

Number of pages of the result

12

Pages from-to

119-130

Number of pages of the book

183

Publisher name

Epika

Place of publication

Jindřichův Hradec

UT code for WoS chapter

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