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Sliding wear behavior of different HVOF sprayed cermet coatings

V. A. ŞERBAN1, D. UŢU1,* , I. HULKA1, C. OPRIŞ1

Affiliation

  1. University “Politehnica” Timisoara, Mechanical Engineering Faculty, Timisoara, Romania

Abstract

The current study is focused on cermet based WC hard coatings, materials that are extensively used in applications requiring wear resistance. Two different powders WC-20%CrC-7%Ni and WC-10%Co-4%Cr were thermally sprayed on low-carbon steel substrates using the high-velocity oxygen-fuel (HVOF) process. The used powders were spheroidized having the grain sizes in the range of -10+2μm. Both coatings were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) in order to study their morphology and phases. The sliding wear resistance was determined using the pin-on-disk method. Comparative results showed that the WC-CoCr coating has better wear properties than the WC-CrC-Ni coating..

Keywords

Cermet coatings, Sliding wear resistance, HVOF spraying.

Citation

V. A. ŞERBAN, D. UŢU, I. HULKA, C. OPRIŞ, Sliding wear behavior of different HVOF sprayed cermet coatings, Optoelectronics and Advanced Materials - Rapid Communications, 6, 7-8, July-August 2012, pp.746-749 (2012).

Submitted at: March 28, 2012

Accepted at: July 19, 2012