Twin disc micropitting tests

Tiina Ahlroos (Corresponding Author), Helena Ronkainen, Aino Helle, Risto Parikka, Jouko Virta, Simo Varjus

    Research output: Contribution to journalArticleScientificpeer-review

    23 Citations (Scopus)

    Abstract

    Gears are important power transmission components and their efficiency and durability strongly depend on their tribological performance. The demand for higher efficiency has further increased the requirements for controlled tribological performance of gear contacts. One of the typical tribological failures that gears experience is micropitting, which is a fatigue failure of the surface strongly associated with low lubricant film thickness. Micropitting is claimed to be the dominant life limitation for ground hardened gears operating under modest conditions. In this work the factors affecting micropitting performance of gears were studied. Twin disc experiments were carried out to investigate the effect of surface roughness, lubricant type and surface treatment on micropitting performance of two case hardening steels. The test results showed that the roughness of the gear has a major impact on the micropitting performance. Also the use of DLC coating or carbonitriding surface treatment and the use of ester type lubricant had a beneficial effect compared to untreated or mineral oil lubricated surfaces.
    Original languageEnglish
    Pages (from-to)1460-1466
    Number of pages7
    JournalTribology International
    Volume42
    Issue number10
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Gears
    lubricants
    Lubricants
    surface treatment
    Surface treatment
    Surface roughness
    Case hardening
    Carbonitriding
    mineral oils
    Mineral Oil
    power transmission
    Mineral oils
    Steel
    Power transmission
    durability
    hardening
    Film thickness
    esters
    Esters
    surface roughness

    Keywords

    • gears
    • micropitting
    • lubrication

    Cite this

    Ahlroos, Tiina ; Ronkainen, Helena ; Helle, Aino ; Parikka, Risto ; Virta, Jouko ; Varjus, Simo. / Twin disc micropitting tests. In: Tribology International. 2009 ; Vol. 42, No. 10. pp. 1460-1466.
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    abstract = "Gears are important power transmission components and their efficiency and durability strongly depend on their tribological performance. The demand for higher efficiency has further increased the requirements for controlled tribological performance of gear contacts. One of the typical tribological failures that gears experience is micropitting, which is a fatigue failure of the surface strongly associated with low lubricant film thickness. Micropitting is claimed to be the dominant life limitation for ground hardened gears operating under modest conditions. In this work the factors affecting micropitting performance of gears were studied. Twin disc experiments were carried out to investigate the effect of surface roughness, lubricant type and surface treatment on micropitting performance of two case hardening steels. The test results showed that the roughness of the gear has a major impact on the micropitting performance. Also the use of DLC coating or carbonitriding surface treatment and the use of ester type lubricant had a beneficial effect compared to untreated or mineral oil lubricated surfaces.",
    keywords = "gears, micropitting, lubrication",
    author = "Tiina Ahlroos and Helena Ronkainen and Aino Helle and Risto Parikka and Jouko Virta and Simo Varjus",
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    Ahlroos, T, Ronkainen, H, Helle, A, Parikka, R, Virta, J & Varjus, S 2009, 'Twin disc micropitting tests', Tribology International, vol. 42, no. 10, pp. 1460-1466. https://doi.org/10.1016/j.triboint.2009.05.023

    Twin disc micropitting tests. / Ahlroos, Tiina (Corresponding Author); Ronkainen, Helena; Helle, Aino; Parikka, Risto; Virta, Jouko; Varjus, Simo.

    In: Tribology International, Vol. 42, No. 10, 2009, p. 1460-1466.

    Research output: Contribution to journalArticleScientificpeer-review

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    T1 - Twin disc micropitting tests

    AU - Ahlroos, Tiina

    AU - Ronkainen, Helena

    AU - Helle, Aino

    AU - Parikka, Risto

    AU - Virta, Jouko

    AU - Varjus, Simo

    N1 - Project code: G4SU01153

    PY - 2009

    Y1 - 2009

    N2 - Gears are important power transmission components and their efficiency and durability strongly depend on their tribological performance. The demand for higher efficiency has further increased the requirements for controlled tribological performance of gear contacts. One of the typical tribological failures that gears experience is micropitting, which is a fatigue failure of the surface strongly associated with low lubricant film thickness. Micropitting is claimed to be the dominant life limitation for ground hardened gears operating under modest conditions. In this work the factors affecting micropitting performance of gears were studied. Twin disc experiments were carried out to investigate the effect of surface roughness, lubricant type and surface treatment on micropitting performance of two case hardening steels. The test results showed that the roughness of the gear has a major impact on the micropitting performance. Also the use of DLC coating or carbonitriding surface treatment and the use of ester type lubricant had a beneficial effect compared to untreated or mineral oil lubricated surfaces.

    AB - Gears are important power transmission components and their efficiency and durability strongly depend on their tribological performance. The demand for higher efficiency has further increased the requirements for controlled tribological performance of gear contacts. One of the typical tribological failures that gears experience is micropitting, which is a fatigue failure of the surface strongly associated with low lubricant film thickness. Micropitting is claimed to be the dominant life limitation for ground hardened gears operating under modest conditions. In this work the factors affecting micropitting performance of gears were studied. Twin disc experiments were carried out to investigate the effect of surface roughness, lubricant type and surface treatment on micropitting performance of two case hardening steels. The test results showed that the roughness of the gear has a major impact on the micropitting performance. Also the use of DLC coating or carbonitriding surface treatment and the use of ester type lubricant had a beneficial effect compared to untreated or mineral oil lubricated surfaces.

    KW - gears

    KW - micropitting

    KW - lubrication

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