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A new view of the deterioration and wear of cemented carbide rock drill buttons
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences.
Manuscript (Other academic)
URN: urn:nbn:se:uu:diva-91635OAI: oai:DiVA.org:uu-91635DiVA: diva2:164433
Available from: 2004-04-15 Created: 2004-04-15 Last updated: 2010-01-13Bibliographically approved
In thesis
1. On the Nature of Cemented Carbide Wear in Rock Drilling
Open this publication in new window or tab >>On the Nature of Cemented Carbide Wear in Rock Drilling
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

WC/Co cemented carbide is a composite material for highly demanding wear applications. The unique combination of hardness (from the WC-phase) and toughness (from the binder Co) gives a material especially suitable for rock drilling. This thesis, investigates the deterioration and wear of these cemented carbide buttons and the correlation to different rock types.

To better understand the nature of the wear of the cemented carbide buttons, the counter surface –the rock- has also been studied. A range of important rock types has been investigated with respect to hardness distribution and scratch response in a micro scale and friction properties when slid against cemented carbides.

The cemented carbide may deteriorate due to a number of mechanisms. The effect of fatigue in the structure was studied in TEM and particle erosion response was used to probe the corresponding mechanical degradation.

Further, homing cross sectioning has been developed and used as a new technique to investigate the presence of weak zones in the surface layer of a drill button. It was found that rock penetration into this layer is a very common mechanism, with profound implications for the nature of the wear.

High resolution scanning electron microscopy has been extensively used to map the deterioration and wear of numerous drill buttons, worn against different rock types in different kinds of drilling applications. Finally, the collected data on the surface damage, the reptile skin formation, the rock intrusion and the properties of the rock are assembled into a new view of the deterioration and wear of cemented carbide in rock drilling.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2004. 74 p.
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 964
Materials science, cemented carbide, wear, rock drilling, rock, Materialvetenskap
National Category
Materials Engineering
urn:nbn:se:uu:diva-4223 (URN)91-554-5939-0 (ISBN)
Public defence
2004-05-07, Siegbahnsalen, Ångströmlaboratoriet, Polacksbacken, Uppsala, 10:15
Available from: 2004-04-15 Created: 2004-04-15Bibliographically approved

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