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Characterization of surface degradation and wear damage Of cemented carbide in rock drilling
Dalarna University, School of Technology and Business Studies, Materials Technology. (Materials Technology)ORCID iD: 0000-0001-7938-9909
Dalarna University, School of Technology and Business Studies, Materials Technology.ORCID iD: 0000-0002-4359-4967
Sandvik Mining and Rock Technology, Rock Tools division, Sweden; Department of Engineering Sciences, Uppsala University, Sweden.ORCID iD: 0000-0003-1471-8307
Dalarna University, School of Technology and Business Studies, Materials Technology.
2018 (English)In: The 18th Nordic Symposium on Tribology – NORDTRIB 2018 / [ed] Prof. Staffan Jacobson, 2018Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

In this work, worn top hammer drill bit buttons after underground drifting in Granodiorite are analysed using scanning electron microscopy (SEM), Auger electron spectroscopy (AES) and electron backscatter diffraction (EBSD) to understand the dominant surface failure and wear mechanisms on the flank wear land region, i.e. the outer side of the gauge row cemented carbide buttons. SEM shows that the worn surface of the flank wear land is partly covered with islands of a thin rock material transfer layer and that the exposed cemented carbide show deformed, cracked and fragmented WC grains. AES gives that the transferred rock material is mainly located on the surface but may penetrate into cemented carbide microstructure to a depth of 1-2 WC grain diameters. Finally, EBSD reveals that the deformation of the cemented carbide in the flank wear land region is located to a thin zone, about ~10 μm in depth.

Place, publisher, year, edition, pages
2018.
Keywords [en]
Wire drawing; Cemented carbide; Surface degradation; Wear mechanisms
National Category
Materials Engineering
Research subject
Steel Forming and Surface Engineering
Identifiers
URN: urn:nbn:se:du-28028OAI: oai:DiVA.org:du-28028DiVA, id: diva2:1228409
Conference
The 18th Nordic Symposium on Tribology – NORDTRIB 2018, 18-21 June 2018, Uppsala University, Uppsala, Sweden
Projects
Mikrostrukturell design av hårdmetall för bergborrtillämpningar
Funder
Knowledge Foundation, 20160132Available from: 2018-06-28 Created: 2018-06-28 Last updated: 2018-06-28Bibliographically approved

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