HIGH TEMPERATURE EROSION WEAR OF CERMET PARTICLES REINFORCED SELF-FLUXING ALLOY MATRIX HVOF SPRAYED COATINGS

Andrei Surzhenkov, Dmitry Goljandin, Rainer Traksmaa, Mart Viljus, Kristofer Talviste, Aare Aruniit, Jyrki Latokartano, Priit Kulu

Abstract


In the present paper, the resistance of high velocity oxy-fuel (HVOF) sprayed TiC-NiMo and Cr3C2-Ni cermet particles reinforced NiCrSiB self-fluxing alloy matrix coatings to high temperature erosion wear is studied. Microstructure of the coatings was examined by SEM, phase composition was determined by XRD. A four-channel centrifugal particle accelerator was applied to study the high temperature erosion wear of the coatings. The impact angles were 30 and 90 degrees, initial particle velocity was 50 m/s, temperature of the test - 650 degrees. Volume wear of the coatings was calculated and compared to the respective values of the reference materials. Wear mechanisms were studied by SEM.

DOI: http://dx.doi.org/10.5755/j01.ms.21.3.7617


Keywords


self-fluxing alloy; cermet; composite coating; high temperature wear; erosion wear

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Print ISSN: 1392–1320
Online ISSN: 2029–7289