RESEARCH ON TRIBOLOGICAL BEHAVIOR OF Cr3C2-25NiCr-COATED BRAKE DISC

Halä°l Kili㇠and Cenk Misirli ()
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Halä°l Kiliã‡: Department of Machine, Technical Sciences Vocational School, Kırklareli University, Kırklareli, Turkey
Cenk Misirli: Department of Mechanical Engineering, Trakya University, Edirne, Turkey

Surface Review and Letters (SRL), 2021, vol. 28, issue 10, 1-11

Abstract: This research presents the results of a comparative study to determine the friction and wear behavior of the high-velocity oxygen fuel (HVOF)-sprayed Cr3C2-25NiCr-coated brake disc. The friction and wear behavior of Cr3C2-25NiCr-coated brake disc (CD) and the sliding against the commercial brake pad were examined on a laboratory-scale disc-pad dynamometer and the findings were compared with those of reference brake disc (UCD). The coating was deposited by means of the HVOF process on a grey cast iron (GCI) substrate. Braking tests were performed according to the SAE-J2430 test standard. The as-sprayed coating was characterized for their microstructure and phase constitution by SEM/EDS and XRD. The results reveal that the coefficient of friction (COF) of CD and UCD varies between 0.42–0.57 and 0.44–0.62, respectively. The Cr3C2-25NiCr-coated brake disc was found to have exhibited a comparable COF and lower wear loss to the reference brake disc. The addition of a ceramic phase to the brake disc coating played an important role in reducing the COF to an acceptable range and improving the sliding wear resistance of the brake pair.

Keywords: Brake disc; braking effectiveness; ceramic coating; wear (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500979

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