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Influence of wire-EDM on high temperature sliding wear behavior of WC10Co(Cr/V) cemented carbide

(BQ) This paper reports the friction and wear response of WC–10%Co(Cr/V) cemented carbide with different surface finishes, attained by grinding (G) and wire-EDM, respectively, during sliding experiments at 400 °C. | Int. Journal of Refractory Metals and Hard Materials 41 (2013) 198–209 Contents lists available at ScienceDirect Int. Journal of Refractory Metals and Hard Materials journal homepage: www.elsevier.com/locate/IJRMHM Influence of wire-EDM on high temperature sliding wear behavior of WC10Co(Cr/V) cemented carbide Y. Pérez Delgado a, P. De Baets a, K. Bonny a, V. Carretero Olalla b, J. Vleugels c, B. Lawers d, M.H. Staia a,⁎ a Ghent University, Mechanical Construction and Production Department, Technologiepark 903, Zwijnaarde, B-9052, Gent, Belgium Ghent University, Department of Materials Science and Engineering, Technologiepark 903, Zwijnaarde, B-9052, Gent, Belgium Catholic University of Leuven (K.U. Leuven), Metallurgy and Materials Engineering Department, Kasteelpark Arenberg 44, BE-3001, Leuven, Belgium d Catholic University of Leuven (K.U. Leuven), Mechanical Engineering Department, Celestijnenlaan 300 B, BE-3001, Leuven, Belgium b c a r t i c l e i n f o Article history: Received 19 January 2013 Accepted 28 March 2013 Keywords: Sliding wear Wire EDM cemented carbide High temperature wear Friction coefficients Wear mechanisms Sliding contact Residual stresses a b s t r a c t This paper reports the friction and wear response of WC–10%Co(Cr/V) cemented carbide with different surface finishes, attained by grinding (G) and wire-EDM, respectively, during sliding experiments at 400 °C. For comparison, tests under the same conditions were carried out at 25 °C. The wear experiments were performed under a normal force of 14 N, which produced a Hertzian maximum pressure of 3.10 GPa, and a sliding speed of 0.3 m/s against WC–6%Co(Cr/V) balls of 6 mm diameter. At 25 °C the average values of the friction coefficients were 0.36 ± 0.04 and 0.39 ± 0.06 for the ground and wire-EDM surface finishes, respectively. The mechanical behavior of both systems at 25 °C was assessed by carrying out analytical calculations of the stress field created by a circular sliding contact under a