TRIBOLOGICAL PROPERTIES OFCrNCOATING UNDER LUBRICATION CONDITIONS

Janusz Lubas ()
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Janusz Lubas: Institute of Technology, Rzeszow University, Rejtana Street16A, 35-959 Rzeszow, Poland

Surface Review and Letters (SRL), 2012, vol. 19, issue 04, 1-7

Abstract: The paper presents research results of the influence ofCrNcoating on the friction parameters in friction pairs under lubricated friction conditions. The formedCrNhomogeneous coating andCrN-steel 46Cr2 "ring" structure coating was matched under test conditions with a counterpart made from SAE-48 and SAE-783 bearing alloys. Tested sliding pairs were lubricated with 5W/40 Lotos synthetic engine oil. The tribological test was conducted on block-on-ring tester. The applied modification technologies of the surface layer of steel allowed for obtaining construction materials with pre-determined tribological characteristics required for the elements of friction pairs in lubricated contact. The results of the tests proved the possibility of implementingCrNcoating in friction pairs, which work under mixed friction conditions. The results showed differences in the wear of bearing alloy, as the effect of the interaction between the co-operating surface layers and of the physiochemical changes of their surfaces, induced by external forces. The smallest wear of the bearing alloy occurs during the cooperation with the nitrided layer, whereas the largest wear occurs during the cooperation with the homogenousCrNcoating. TheCrNcoating-46Cr2 steel "ring structure" decreases friction resistance during the start-up of the sliding pair, as well as lowers the level of the friction force and temperature in the friction area during co-operation with SAE-783 bearing alloys.

Keywords: Wear; sliding friction; surface treatment; CrN; PVD (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1142/S0218625X12500424

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