Surface-fatigue tests conducted with AISI 9310 steel spur gears show surface-fatigue life of AISI 9310 steel spur gears increased as much as 400 percent by addition of small amount of phosphorus-type extreme-pressure (EP) additive in lubricant. Antiwear or EP additives either absorbed onto surface or react with surface to form protective coating or surface film. Boundary film provides barrier that prevents contact of metal surfaces and provides low shear strength, which reduces friction coefficient below base metal.


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    Title :

    Lubricants and Additives Affect Spur-Gear Fatigue


    Contributors:
    Scibbe, H. (author) / Townsend, D. (author) / Aron, P. (author) / Zaretsky, E. (author)

    Published in:

    Publication date :

    1986-09-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Effect of Surface Characteristics and Lubricants on Spur Gear Efficiency

    Anderson, N. | British Library Conference Proceedings | 2006


    Gear lubricants

    Mansion, H.D. | Engineering Index Backfile | 1942


    Fatigue life of spur and helical gear sets

    Townsend, D. P. / Zaretsky, E. V. / Coy, J. J. | NTRS | 1976


    Additives in Lubricants

    Kalil, Peter | SAE Technical Papers | 1961


    Epicyclic spur-gear trains

    Cryer, J. | Engineering Index Backfile | 1924