Open AccessDry sliding friction and wear response of WC-Co hardmetal pairs in linearly reciprocating and rotating contact
Author(s) -
Yeczain Pérez Delgado,
Koenraad Bonny,
Patrick De Baets,
Patric Daniel Neis,
Vanessa Rodriguez Fereira,
Olivier Malek,
Fei Zhang,
Bert Lauwers
Publication year - 2011
Publication title -
sustainable construction and design
Language(s) - English
Resource type - Journals
eISSN - 2295-9092
pISSN - 2032-7471
DOI - 10.21825/scad.v2i1.20430
Subject(s) - reciprocating motion , polishing , materials science , abrasion (mechanical) , tribology , composite material , metallurgy , profilometer , friction coefficient , normal force , surface roughness , mechanical engineering , engineering , gas compressor , physics , mechanics
This paper presents an experimental evaluation of friction and wear properties of WC-Cocemented carbides. A comparison is made between unlubricated rotating and linearly reciprocating pin-onplate sliding pairs. The plate specimens were WC-10wt%Co grades surface finished by polishing orsequential wire-EDM steps, whereas WC-6wt%Co pins were used as counter body. The tests were carriedout at room temperature using a sliding speed of 0.30m/s and mean Hertzain contact pressures of 1.76 and2.08 GPa, i.e., normal contact loads of 15N and 25N, respectively. The worn surfaces on plate sampleswere quantified in terms of 2–D wear profiles obtained by means of surface topography scanningequipment. Wear mechanisms such as polishing and abrasion were identified using optical microscopy.Inferior tribological characteristics for wire-EDM surface finish compared to polishing were found. Higherfriction coefficient and wear levels were measured in unidirectional rotating sliding experiments comparedto linearly reciprocating test conditions.