The problems of resistance to scuffing of heavily loaded lubricated friction joints with WC/C-coated parts
Author:
Michalczewski Remigiusz,Piekoszewski Witold,Tuszynski Waldemar,Szczerek Marian
Abstract
Purpose
– The purpose of this paper was to explore the mechanisms of scuffing propagation of heavily loaded lubricated friction pair elements coated with low-friction WC/C coating for various material combinations.
Design/methodology/approach
– The investigations were performed for low-friction coatings WC/C (a-C:H:W) deposited by the reactive sputtering physical vapour deposition (PVD) process. Experiments were carried out using a four-ball tester with continuously increasing loads. Tests were conducted for the following four material combinations: steel/steel tribosystem (all balls uncoated); steel/coating tribosystem (one upper ball uncoated/three lower balls WC/C-coated); coating/steel tribosystem (one upper ball WC/C-coated/three lower balls uncoated); and coating/coating tribosystem (all balls WC/C-coated).
Findings
– The better scuffing resistance is achieved by coating only one element (coating/steel tribosystem) than all elements (coating/coating tribosystem). The description of scuffing propagation for all investigated tribosystems was done. The high scuffing resistance of the coating/steel tribosystem resulted from reducing the adhesion between rubbing surfaces due to low chemical affinity (similarities) between the steel and the coating material and the presence of solid lubricant in the friction zone.
Practical implications
– In all cases, when a coating is applied, an increase in scuffing resistance is observed. However, it is better to coat only one element than all. Furthermore, the scuffing resistance for the coating/steel tribosystem is significantly higher than for the steel/coating tribosystem.
Originality/value
– The main value of this paper is description of scuffing propagation and revealing the new aspects in application of low-friction WC/C coating for heavily loaded lubricated friction pair elements. The overlapping ratio has been defined as an important factor influencing the scuffing resistance of the coated tribosystems.
Subject
Surfaces, Coatings and Films,General Energy,Mechanical Engineering
Reference23 articles.
1. Antonov, M.
,
Hussainova, I.
,
Sergejev, F.
,
Kulu, P.
and
Gregor, A.
(2008), “Assessment of gradient and nanogradient PVD coatings behaviour under erosive, abrasive and impact wear conditions”, Wear, Vol. 267 Nos. 5/8, pp. 898-906. 2. Bayón, R.
,
Zubizarreta, C.
,
Nevshupa, R.
,
Rodriguez, J.C.
,
Fernández, X.
,
de Gopegui, U.R.
and
Igartua, A.
(2011), “Rolling-sliding, scuffing and tribocorrosion behaviour of PVD multilayer coatings for gears application”, Industrial Lubrication and Tribology, Vol. 63 No. 1, pp. 17-26. 3. Bowman, W.F.
and
Stachowiak, G.W.
(1996), “A review of scuffing models”, Tribology Letters, Vol. 2 No. 2, pp. 113-131. 4. Bujak, J.
and
Michalczewski, R.
(2011), “Characterization and properties of low-friction, multilayered Cr-doped diamond-like carbon coatings prepared by pulse biased filtered cathodic arc de-position”, Proceeding of IMechE Part J: Journal of Engineering Tribology, Vol. 225 No. 8, pp. 875-882. 5. Erdemir, A.
(2005), “A crystal chemical approach to the formulation of self-lubricating nanocomposite coatings”, Surface and Coatings Technology, Vol. 200 Nos. 5/6, pp. 1792-1796.
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献
|
|