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Title: Surface finishing: Impact on tribological characteristics of WC-Co hardmetals
Authors: Bonny, K. ×
De Baets, P.
Quintelier, J.
Vleugels, Jef
Jiang, D.
Van der Biest, Omer
Lauwers, Bert
Liu, Weidong #
Issue Date: Jan-2010
Publisher: Elsevier sci ltd
Series Title: Tribology international vol:43 issue:1-2 pages:40-54
Abstract: Flat samples of WC-Co hardmetals with 6-12 wt%Co were surface finished by grinding polishing and wire-electro-discharge machining (EDM). Comparative dry reciprocating sliding experiments against WC-6wt%Co pins were performed using a Plint TE77 tribometer. Tribological characteristics were recorded online. Wear Surfaces were characterized by surface scanning topography and scanning electron microscopy. Wire-EDM'ed samples exhibited higher friction and wear compared to ground and polished equivalents. This trend was correlated to X-ray diffraction measurements revealing tensile residual surface stresses in WC after wire-EDM contrary to compressive surface stresses after grinding and polishing. However, finer executed EDM reduces friction and wear significantly. (C) 2009 Elsevier Ltd. All rights reserved.
URI: 
ISSN: 0301-679X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
Production Engineering, Machine Design and Automation (PMA) Section
× corresponding author
# (joint) last author

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