Tribological Characteristics of Duplex Treated AISI 4140 Steel

Bojan Podgornik, Jose Vizintin, Helena Ronkainen, Kenneth Holmberg

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)


    In the present study samples of AISI 4140 steel pre-treated by plasma nitriding and coated by a hydrogen-free hard carbon film were investigated with respect to microhardness, surface roughness, residual stress, scratch adhesion and dry sliding wear resistance. To examine the influence of the nitrided zone on the performance of the coating-substrate composite, the coating was deposited on hardened as well as on plasma nitrided samples, nitrided under two different nitriding conditions.

    Wear tests showed that in all cases a hydrogen-free hard carbon coating produced a reduction in the coefficient of friction of about one order of magnitude. Wear scar profiling and weight loss calculations showed that the wear resistance of the duplex treated steel was dramatically improved compared to uncoated steel. It was also found that nitriding of the substrate improves the wear resistance of the hydrogen-free hard carbon coating compared to the coating deposited on a hardened substrate.
    Original languageEnglish
    Title of host publicationThinning Films and Tribological Interfaces
    Subtitle of host publicationProceedings of the 26th Leeds-Lyon Symposium on Tribology
    EditorsD. Dowson, M. Priest, C.M. Taylor, P. Ehret, T.H.C. Childs, G. Dalmaz, A.A. Lubrecht, Y. Berthier, L. Flamand, J.-M. Georges
    ISBN (Print)978-0-444-50531-6
    Publication statusPublished - 2000
    MoE publication typeA4 Article in a conference publication
    Event26th Leeds-Lyon Symposium on Tribology - University of Leeds, Leeds , United Kingdom
    Duration: 14 Sept 199917 Sept 1999

    Publication series

    SeriesTribology Series


    Conference26th Leeds-Lyon Symposium on Tribology
    Country/TerritoryUnited Kingdom


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