Author/Authors :
Bonny، نويسنده , , K. and De Baets، نويسنده , , P. and Van Wittenberghe، نويسنده , , J. and Perez Delgado، نويسنده , , Y. and Vleugels، نويسنده , , J. and Van der Biest، نويسنده , , O. and Lauwers، نويسنده , , B.، نويسنده ,
Abstract :
Tribological characteristics of fine-grained WC–8 wt%Ni with different surface finishing conditions corresponding to sequential wire electrical discharge machining (wire-EDM) or grinding were investigated by performing dry reciprocating sliding experiments on TE77 pin-on-plate equipment with WC–6 wt%Co as mating material. Surface finishes and wear surfaces were characterized using surface topography scanning, SEM analysis and EDX spectrometry. The decreased wear resistance due to wire-EDM could be linked to flexural strength properties as well as XRD measurements revealing tensile residual stresses on wire-EDM surfaces, in contrast with the compressive stress state on ground surfaces. Substantial improvement of wear resistance was accomplished with finer-executed EDM steps.
Keywords :
Pin-on-plate , WC-Ni cemented carbide , Wire-EDM , Dry reciprocating sliding
