A new scuffing shock test method for the determination of the resistance to scuffing of coated gears

• Autorzy: Tuszynski W. , Michalczewski R. , Szczerek M. , Kalbarczyk M.
• Języki publikacji: EN

Abstrakty

EN

An improvement in the scuffing resistance of toothed gears is achievable by e.g. the deposition of thin, hard coatings onto the gear teeth. However, the testing of the scuffing resistance of coated gears requires the application of specialised test methods. This paper presents a new test method, designed by the authors, called “gear scuffing shock test for coatings”. This method is based on the test method denoted as FZG S-A10/16,6R/110 developed at the Technical University of Munich. Because the FZG test method is dedicated exclusively to lubricating oils, its application for testing coated gears required introducing significant modifications. The developed method has been verified during the testing of the scuffing resistance of gears coated with the low-friction a-C:H:W coating and composite low-friction MoS2/Ti coating. Various material combinations were tested: coating–coating (both gears coated), coating-steel, steel-coating, and for reference steel–steel (both gears uncoated). Mineral, automotive gear oil of API GL-5 performance level, and SAE 80W-90-viscosity grade was used for lubrication. It has been shown that this test method can be successfully applicable to test the scuffing resistance of coated gears - it has a resolution good enough to differentiate between the tested material combinations.

Słowa kluczowe

EN

gear; gear scuffing shock test; low-friction coating; gear test rig; scoring

PL

biegi; tarcie; współczynnik tarcia

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2012
• Tom: Vol. 12, no. 4
• Strony: 436--445
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Tuszynski W.

• Institute for Sustainable Technologies - National ResearchInstitute (ITeE-PIB), Tribology Department, ul. Pulaskiego 6/10, 26-600 Radom, Poland

autor

Michalczewski R.

• Institute for Sustainable Technologies - National ResearchInstitute (ITeE-PIB), Tribology Department, ul. Pulaskiego 6/10, 26-600 Radom, Poland

autor

Szczerek M.

• Institute for Sustainable Technologies - National ResearchInstitute (ITeE-PIB), Tribology Department, ul. Pulaskiego 6/10, 26-600 Radom, Poland

autor

Kalbarczyk M.

• Institute for Sustainable Technologies - National ResearchInstitute (ITeE-PIB), Tribology Department, ul. Pulaskiego 6/10, 26-600 Radom, Poland

Bibliografia

• [1] B.-R. Hohn, P. Oster, U. Schedl, Pitting load capacity test on the FZG gear test rig with load-spectra and one-stage investigations, Tribotest Journal 5-4 (1999) 417–430.
• [2] M. Szczerek, W. Tuszynski, A method for testing lubricants under conditions of scuffing. Part I. Presentation of the method, Tribotest Journal 8-4 (2002) 273–284.
• [3] W. Piekoszewski, M. Szczerek, W. Tuszynski, The action of lubricants under extreme pressure conditions in a modified four-ball tester, Wear 249 (2001) 188–193.
• [4] W. Tuszynski, R. Michalczewski, W. Piekoszewski, M. Szczerek, Effect of ageing automotive gear oils on scuffing and pitting, Tribology International 41 (2008) 875–888.
• [5] R.P.S. Bisht, S. Singhal, A laboratory technique for the evaluation of automotive gear oils of API GL-4 level, Tribotest Journal 6-1 (1999) 69–77.
• [6] FVA Information Sheet No. 243 Status June 2000, Method to assess the scuffing load capacity of lubricants with high EP performance using an FZG gear test rig.
• [7] B.-R. Hohn, K. Michaelis, C. Eberspacher, L. Schlenk, A scuffing load capacity test with the FZG gear test rig for gear lubricants with high EP performance, Tribotest Journal 5-4 (1999) 383–390.
• [8] K. Michaelis, B.-R. Hohn, C. Graswald, Scuffing tests for API GL-1 to GL-5 gear lubricants, in: Proceedings of the 13th International Colloquium Tribology, 2002.
• [9] K. Michaelis, B.-R. Hohn, P. Oster, Influence of lubricant on gear failures test methods and application to gearboxes in practice, Tribotest Journal 11-1 (2004) 43–56.
• [10] B.-R. Hohn, P. Oster, T. Tobie, K. Michaelis, Test methods for gear lubricants, Goriva i maziva 47-2 (2008) 141–152.
• [11] W. Tuszynski, Performance classification of automotive gear oils using the gear scuffing shock test, Tribologia 2 (2009) 259–274 in Polish.
• [12] M. Kalin, J. Vizintin, The tribological performance of DLC-coated gears lubricated with biodegradable oil in various pinion/gear material combinations, Wear 259 (2005) 1270–1280.
• [13] R.C. Martins, Paulo S. Moura, J.O. Seabra, MoS Ti low-friction coating for gears, Tribology International 39 (2006) 1686–1697.
• [14] R. Martins, R. Amaro, J. Seabra, Influence of low friction coatings on the scuffing load capacity and efficiency of gears, Tribology International 41 (2008) 234–243.
• [15] M. Szczerek, R. Michalczewski, W. Piekoszewski, The problems of application of PVD/CVD thin hard coatings for heavy-loaded machine components, in: Proceedings of the ASME/STLE International Joint Tribology Conference, 2007.
• [16] R. Michalczewski, W. Piekoszewski, M. Szczerek, W. Tuszynski, The lubricant-coating interaction in rolling and sliding contacts, Tribology International 42 (2009) 554–560.
• [17] R. Michalczewski, W. Piekoszewski, M. Szczerek, W. Tuszynski, Scuffing resistance of DLC coated gears lubricated with ecological oil, Estonian Journal of Engineering 15-4 (2009) 367–373.