MoS2/WS2/FineLPN Composite Layers – a New Approach to Low Frictional Coatings for Piston Rings

• Autorzy: Kula Piotr , Pietrasik Robert , Pawęta Sylwester , Komorowski Jarosław

Identyfikatory

DOI

10.5604/01.3001.0016.1024

Warianty tytułu

PL

Warstwy kompozytowe MoS2/WS2/FineLPN – nowe podejście do powłok o niskim tarciu na pierścienie tłokowe

• Języki publikacji: EN

Abstrakty

EN

In the search for alternative processes of technologically difficult and environmentally dangerous galvanic chromium coatings on cast iron piston rings, composite coatings of low-friction nanoparticles MoS2, WS2and/or rGO embedded in a hard matrix of iron nitrides have been investigated. Laboratory tribological and operational tests on a real aircraft engine have been carried out to select the optimal technological parameters and microstructures of low frictional layers. A dry friction coefficient of 0.13 has been obtained for the best of the processes, i.e., four times lower than for raw reference samples (0.55). According to that technological option, the low-friction layers were produced for a set of rings for three cylinders of a Boxer aircraft engine and tested comparatively in an operational test with the rings in the other three cylinders. The experimental engine has passed the operational test obtaining the assumed power performance, fuel consumption and admission criteria of exhaust purity and oil purity.

PL

W poszukiwaniu alternatywnych procesów dla trudnych technologicznie i niebezpiecznych dla środowiska galwanicznych powłok chromowych na żeliwnych pierścieniach tłokowych badano powłoki kompozytowe z niskotarciowych nanocząstek MoS2, WS2 i/lub rGO osadzonych w twardej osnowie z azotków żelaza. Przeprowadzono laboratoryjne badania tribologiczne oraz próby eksploatacyjne na rzeczywistym silniku lotniczym w celu doboru optymalnych parametrów technologicznych i mikrostruktur warstw o niskim współczynniku tarcia. Dla najlepszego z procesów uzyskano współczynnik tarcia suchego na poziomie 0,13, czyli czterokrotnie niższy niż dla surowych próbek referencyjnych (0,55). Zgodnie z tą opcją technologiczną wytworzono warstwy o niskim współczynniku tarcia dla zespołu pierścieni do trzech cylindrów silnika lotniczego Boxer i przetestowano je porównawczo w próbie eksploatacyjnej z pierścieniami chromowanymi w pozostałych trzech cylindrach, uzyskując założone parametry mocy, zużycie paliwa oraz kryteria dopuszczenia czystości spalin i oleju.

Słowa kluczowe

EN

piston rings; nitriding; low friction; wear

PL

pierścienie tłokowe; azotowanie; warstwa niskotarciowa; zużycie

• Wydawca: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
• Czasopismo: Tribologia
• Rocznik: 2022
• Tom: nr 3
• Strony: 49--58
• Opis fizyczny: Bibliogr. 34 poz., rys., wykr., wz.

Twórcy

autor

Kula Piotr

• Hart-Tech Ltd., 45 Niciarniana Street, 92-320 Lodz, Poland 2 Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowski Street, 90-924 Lodz, Poland.

• https://orcid.org/0000-0002-1796-9155

autor

Pietrasik Robert

• Hart-Tech Ltd., 45 Niciarniana Street, 92-320 Lodz, Poland 2 Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowski Street, 90-924 Lodz, Poland.

• https://orcid.org/0000-0001-8186-9231

autor

Pawęta Sylwester

• Hart-Tech Ltd., 45 Niciarniana Street, 92-320 Lodz, Poland 2 Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowski Street, 90-924 Lodz, Poland.

• https://orcid.org/0000-0002-5994-161X

autor

Komorowski Jarosław

• F.P.T. PRIMA SA, 17 Lisciasta Street, 91-357 Lodz, Poland

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).