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Tribological Testing of Some Potential PVD and CVD Coatings for Steel Wire Drawing Dies
Högskolan Dalarna, Akademin Industri och samhälle, Materialvetenskap.
Högskolan Dalarna, Akademin Industri och samhälle, Materialvetenskap.
2010 (engelsk)Inngår i: Nordtrib 2010, Storforsen, 2010Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Cemented carbide is today the most frequently used drawing die material in steel wire drawing applications. This is mainly due to the possibility to obtain a broad combination of hardness and toughness thus meeting the requirements concerning strength, crack resistance and wear resistance set by the wire drawing process. However, the increasing cost of cemented carbide in combination with the possibility to increase the wear resistance of steel through the deposition of wear resistant CVD and PVD coatings have enhanced the interest to replace cemented carbide drawing dies with CVD and PVD coated steel wire drawing dies. In the present study, the possibility to replace cemented carbide wire drawing dies with CVD and PVD coated steel drawing dies have been investigated by tribological characterisation, i.e. pin-on-disc and scratch testing, in combination with post-test observations of the tribo surfaces using scanning electron microscopy, energy dispersive X-ray spectroscopy and 3D surface profilometry. Based on the results obtained, CVD and PVD coatings aimed to provide improved tribological performance of steel wire drawing dies should display a smooth surface topography, a high wear resistance, a high fracture toughness (i.e. a high cracking and chipping resistance) and intrinsic low friction properties in contact with the wire material. Also, the steel substrate used must display a sufficient load carrying capacity and resistance to thermal softening. Of the CVD and PVD coatings evaluated in the tribological tests, a CVD TiC and a PVD CrC/C coating displayed the most promising results.

sted, utgiver, år, opplag, sider
Storforsen, 2010.
Emneord [en]
Wire drawing, drawing die, bearing steel, PVD, CVD, coatings, friction, wear
HSV kategori
Forskningsprogram
Stålformning och ytteknik
Identifikatorer
URN: urn:nbn:se:du-4858OAI: oai:dalea.du.se:4858DiVA, id: diva2:522147
Konferanse
Nordtrib 2010, Storforsen, 8-11 juni, 2010
Tilgjengelig fra: 2010-06-23 Laget: 2010-06-23 Sist oppdatert: 2013-01-18bibliografisk kontrollert

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