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Abrasive wear of tungsten carbide—cobalt composites. I. Rotary drilling tests

Authors
Journal
Materials Science and Engineering
0025-5416
Publisher
Elsevier
Publication Date
Volume
13
Issue
2
Identifiers
DOI: 10.1016/0025-5416(74)90175-x

Abstract

Abstract Studies have been made of the wear mechanisms operative during rotary drilling of abrasive rock using tungsten carbide-cobalt tools of varying abrasion and fractire resistance. For rock drilling grades, containing from 8 to 12% cobalt, wear occurs both by cobalt erosion and by gross fracture of the carbide skeleton. Although fracture is likely to account for the greater proportion of the weight loss, the wear rate is larger for composites having the greatest fracture resistance and lowest abrasion resistance. The apparent anomaly suggests that the two observed mechanisms may be stages in an overall mechanism.

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