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Adhesion tendency of PVD TiAlN coatings at elevated temperatures during reciprocating sliding against carbon steel
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.
R&D Materials and Technology Development, Seco Tools AB, Fagersta.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0003-1162-4671
R&D Materials and Technology Development, Seco Tools AB, Fagersta.
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2015 (Engelska)Ingår i: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 330-331, s. 209-222Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This work focussed on assessing the contact conditions driving the adhesion tendency of PVD TiAlN coated cemented carbide during reciprocating sliding against a normalized AISI 4137 carbon steel. A special emphasis is given to the surface topography of the coating. Results are analysed in terms of friction and material transfer over a large range of temperatures (up to 800 °C) and contact pressures. The post-test surface analysis of the specimens is conducted in order to understand the tribological behaviour and elucidate the formation mechanisms of transfer layers. A numerical model is developed to assess the amount of heat effectively transmitted into the first bodies and the temperature of the surfaces in contact.Whereas temperatures close to 400 °C ensure the formation of a stable tribofilm reducing friction, the highest temperatures lead to unstable frictional behaviour. Coating surface topography has been seen to be a major parameter driving material transfer during the first stages of the contact and the formation of a transfer layer. Thin and homogeneous layers are almost instantaneously formed with a polished surface whereas some time is required with a rougher one to form a film. A large amount of the frictional power is dissipated into these layers and high temperatures can be reached at the surface due to frictional heating. Contact pressure is found to be a parameter promoting transfer and oxidation

Ort, förlag, år, upplaga, sidor
2015. Vol. 330-331, s. 209-222
Nationell ämneskategori
Tribologi (ytteknik omfattande friktion, nötning och smörjning)
Forskningsämne
Maskinelement
Identifikatorer
URN: urn:nbn:se:ltu:diva-34750DOI: 10.1016/j.wear.2015.01.026ISI: 000357438000024Scopus ID: 2-s2.0-84937829854Lokalt ID: 9079582a-f131-4dda-926a-ec58f1b1e897OAI: oai:DiVA.org:ltu-34750DiVA, id: diva2:1008001
Konferens
Intenational Conference on Wear Materials : 12/04/2015 - 16/04/2015
Anmärkning

Validerad; 2015; Nivå 1; 20150609 (andbra); Konferensartikel i tidskrift

Tillgänglig från: 2016-09-30 Skapad: 2016-09-30 Senast uppdaterad: 2018-08-16Bibliografiskt granskad

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Courbon, CedricHardell, JensPrakash, Braham

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