WORKPIECE WEAR MECHANISMS IN DEFORMATION PROCESSING:

by Gilbert J. Baker and  Roger N. Wright; 

Abstract:

Workpiece wear, as opposed to tool wear, has received little attention in deformation processing analysis, except perhaps for the relatively

gross losses associated with sticking friction. This paper focuses on the subtle, but important, liberation of particles from the workpiece

surface (sometimes called "fines"). Emphasis is placed on copper wire drawing, where fines are a major issue vis-�-vis lubrication, surface

quality, and subsequent insulation application. Detailed laboratory study reveals that fine generation involves the classical mechanisms of

delamination wear and rapid wear. In the case of copper wire drawing, delamination wear involves damage to the near-surface from prior processing.

The rapid wear observed is consistent with a modified Archard equation. Delamination wear is retarded by the application of back

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