Comparative analysis of tribological behavior of plasma- and high-velocity oxygen fuel-sprayed WC-10Co-4Cr coatings

Purpose The purpose of this study is to prepare WC-10Co-4Cr coatings using two processes of plasma spraying and high-velocity oxygen fuel (HVOF) spraying. The decarburization behaviors of the different processes are analyzed individually. The microstructural characteristics of the as-sprayed coatings are presented and the wear mechanisms of the different WC–10Co–4Cr coatings are discussed in detail. Design/methodology/approach The WC–10Co–4Cr coatings were formed on the surface of Q235 steel by plasma and HVOF spraying. Findings Plasma spraying causes more decarburizing decomposition of the WC phase than HVOF spraying. In the plasma spraying process, η(Cr25Co25W8C2) phase appears and the C content decreases from the top surface of the coating to the substrate. Practical implications In this study, two WC–10Co–4Cr coatings on Q235 steel prepared by plasma and HVOF spraying were compared with respect to the sliding wear behavior. Originality/value The wear mechanisms of the plasma- and HVOF-sprayed coatings were abrasive and oxidation, respectively.

[1]  F. Ye,et al.  Improvement on mechanical properties and wear resistance of HVOF sprayed WC-12Co coatings by optimizing feedstock structure , 2014 .

[2]  A. Pilkington,et al.  The Dry Sliding Wear Behavior of HVOF-Sprayed WC: Metal Composite Coatings , 2014, Journal of Materials Engineering and Performance.

[3]  M. Salehi,et al.  Effect of Grinding on the Residual Stress and Adhesion Strength of HVOF Thermally Sprayed WC–10Co–4Cr Coating , 2014 .

[4]  Marcello Conte,et al.  Frictional heating calculation based on tailored experimental measurements , 2014 .

[5]  Sheng Hong,et al.  High-velocity oxygen-fuel spray parameter optimization of nanostructured WC–10Co–4Cr coatings and sliding wear behavior of the optimized coating , 2014 .

[6]  N. Sacks,et al.  Performance characterization of metallic substrates coated by HVOF WC-Co , 2013 .

[7]  W. Żórawski.  The microstructure and tribological properties of liquid-fuel HVOF sprayed nanostructured WC–12Co coatings , 2013 .

[8]  Harmesh Kumar,et al.  Slurry erosion behaviour of HVOF sprayed WC―10Co―4Cr and Al2O3 + 13TiO2 coatings on a turbine steel , 2012 .

[9]  S. Bhandari,et al.  Slurry Erosion Performance Study of Detonation Gun-Sprayed WC-10Co-4Cr Coatings on CF8M Steel Under Hydro-Accelerated Conditions , 2012, Journal of Thermal Spray Technology.

[10]  V. Șerban,et al.  Comparison of Structure and Wear Properties of Fine-Structured WC-CoCr Coatings Deposited by HVOF and HVAF Spraying Processes , 2012 .

[11]  P. Bandyopadhyay,et al.  Plasma and HVOF sprayed WC–Co coatings as hard chrome replacement solution , 2012 .

[12]  G. Gou,et al.  Effects of Cr on Microstructure and Hardness of HVOF-Sprayed WC-Co Coating , 2011 .

[13]  Hui-di Zhou,et al.  Effect of Atmospheric Plasma Spraying Power on Microstructure and Properties of WC-(W,Cr)2C-Ni Coatings , 2011 .

[14]  E. Sánchez,et al.  Influence of Plasma Intensity on Wear and Erosion Resistance of Conventional and Nanometric WC-Co Coatings Deposited by APS , 2011 .

[15]  Kanchan Kumari,et al.  Effect of microstructure on abrasive wear behavior of thermally sprayed WC–10Co–4Cr coatings , 2010 .

[16]  H. Mindivan.  Wear behavior of plasma and HVOF sprayed WC-12Co + 6% ETFE coatings on AA2024-T6 aluminum alloy , 2010 .

[17]  G. Montavon,et al.  In-flight and upon impact particle characteristics modelling in plasma spray process , 2010 .

[18]  J. Tirillò,et al.  Microstructure and Wear Behavior of Plasma-Sprayed Nanostructured WC–Co Coatings , 2013 .

[19]  K. Sempf,et al.  Thermophysical and Microstructural Studies on Thermally Sprayed Tungsten Carbide-Cobalt Coatings , 2011 .