Identification of friction and heat partition model at the tool-chip-workpiece interfaces in dry cutting of an Inconel 718 alloy with cBN and coated carbide tools

• Autorzy: Zemzemi F. , Rech J. , Salem W. B. , Dogui A. , Kapsa P.

Identyfikatory

DOI

10.2478/amst-2014-0001

Warianty tytułu

PL

Identyfikacja tarcia i model podziału ciepła w strefie kontaktu wiór-ostrze-materiał obrabiany w toczeniu na sucho nadstopu Inconel 718 narzędziami z CBN i węglików spiekanych z naniesionymi powłokami

• Języki publikacji: EN

Abstrakty

EN

This paper aims at characterizing the frictional behaviour at the cutting tool-workmaterial interface during the dry machining of a Inconel 718 in its aged state with various coated carbide tools and c-BN tools. A specially designed open tribometer has been used to characterize friction coefficient, heat partition coefficient under extreme conditions corresponding to the ones occurring in cutting. The tribometer provides the evolution of the apparent friction coefficient and of the heat partition coefficient for a large range of sliding velocity and contact pressure. It has been shown that friction coefficient as well as heat partition coefficient decrease with sliding velocity or contact pressure. A threshold effect of the contact pressure has been highlighted. On the contrary, any sensitivity to coatings deposited on carbide has been observed, whereas c-BN leads to very low friction coefficients.

PL

W pracy określono charakterystykę tarciowego zachowania się strefy kontaktu wiór-ostrze obrabianego w toczeniu na sucho nadstopu Inconel 718 po starzeniu narzędziami wykonanymi z różnych gatunków węglików spiekanych z naniesionymi powłokami i polikrystalicznego CBN. Zaprojektowano i wykonano tribometr do wyznaczania wartości współczynnika tarcia i współczynnika podziału ciepła. Badania prowadzono w warunkach ekstremalnych zbliżonych do występujących w procesie skrawania na sucho. Tribometr umożliwia pomiary w czasie wartości pozornego współczynnika tarcia i przepływ ciepła dla dużego zakresu wartości prędkości skrawania i nacisku normalnego. Wykazano, że zarówno współczynnik tarcia, jak i podziału ciepła zmniejszają się przy wzroście prędkości i siły normalnej skrawania. Określono graniczny efekt nacisku kontaktowego. Nie stwierdzono wpływu rodzaju powłoki na ostrzu z węglika spiekanego na wartość współczynnika tarcia. Natomiast skrawanie narzędziami z ostrzem p-CBN prowadzi do uzyskania bardzo małej wartości współczynnika tarcia.

Słowa kluczowe

EN

Inconel 718; cutting; friction; heat partition coefficient; cubic boron nitride; coatings; carbides

PL

Inconel 718; skrawanie; tarcie; współczynnik podziału ciepła; regularny azotek boru CBN; powłoki; węgliki spiekane

• Wydawca: Komitet Budowy Maszyn PAN ; De Gruyter
• Czasopismo: Advances in Manufacturing Science and Technology
• Rocznik: 2014
• Tom: Vol. 38, nr 1
• Strony: 5--22
• Opis fizyczny: Bibliogr. 24 poz., fot., rys.

Twórcy

autor

Zemzemi F.

• Université de Monastir, Ecole Nationale d’Ingénieurs de Monastir, Laboratoire de Génie Mécanique, Monastir, Tunisia

autor

Rech J.

• Université de Lyon, ENISE, LTDS, CNRS UMR 5513, 58 Rue Jean Parot, 42000 Saint-Etienne, France

autor

Salem W. B.

• Université de Monastir, Ecole Nationale d’Ingénieurs de Monastir, Laboratoire de Génie Mécanique, Monastir

autor

Dogui A.

• Université de Monastir, Ecole Nationale d’Ingénieurs de Monastir, Laboratoire de Génie Mécanique, Monastir

autor

Kapsa P.

• Université de Lyon, Ecole Centrale de Lyon, LTDS, CNRS UMR 5513, Ecully, Tel.: [phone]; fax: [phone]

Bibliografia

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Uwagi

EN

Authors would like to express their gratitude to the AUBERT & DUVAL Company for the furniture of the Inconel 718 alloy.