Influence of electrical discharge machining on the reciprocating sliding friction and wear response of WC-Co cemented carbides

被引:26
作者
Bonny, K. [1 ]
De Baets, P. [1 ]
Ost, W. [1 ]
Huang, S. [2 ]
Vleugels, J. [2 ]
Liu, W. [3 ]
Lauwers, B. [3 ]
机构
[1] Univ Ghent, Dept Mech Construct & Prod, B-9000 Ghent, Belgium
[2] Catholic Univ Leuven KU Leuven, Dept Met & Mat Engn, MTM, B-3001 Louvain, Belgium
[3] Catholic Univ Leuven KU Leuven, Dept Mech Engn, PMA, B-3001 Louvain, Belgium
关键词
WC-Co cemented carbide; Wire-EDM; Dry reciprocative sliding wear; Pin-on-flat; SURFACE; BEHAVIOR; FRACTURE; MECHANISMS; STRENGTH; EDM;
D O I
10.1016/j.ijrmhm.2008.09.002
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The dry friction and wear behavior of a number of WC-Co cemented carbides. exhibiting 6 up to 12 wt.% cobalt as binder phase and average carbide grain sizes ranging from 0.3 up to 2.2 mu m, combined with various surface finishing variants of wire electrical discharge machining (EDM), was evaluated by performing linearly reciprocating pin-on-flat sliding experiments against WC-Co cemented carbide using normal contact loads of 15 N up to 35 N and a sliding velocity of 0.3 m/s. Post-mortem obtained wear volumes and volumetric wear rates were correlated to real-time recorded penetration depth curves versus sliding distance. Consecutive execution of gradually finer EDM regimes onto the WC-Co alloys was found to considerably enhance the wear performance. Scanning electron microscopy on the worn surfaces revealed the occurrence of several wear mechanisms, i.e., grain polishing, abrasion, grain cracking and surface binder removal, mainly depending on the original surface finish EDM regime. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:350 / 359
页数:10
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