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Examination of wear damage to rock-mining hardmetal drill bits
National Physical Laboratory, Teddington, UK.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. Sandvik Coromant, Sandvik Rock Tools.
Sandvik Coromant, Sandvik Rock Tools.
National Physical Laboratory, Teddington, UK.
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2017 (English)In: International journal of refractory metals & hard materials, ISSN 0958-0611, E-ISSN 2213-3917, Vol. 66, p. 1-10Article in journal (Refereed) Published
Abstract [en]

WC/Co mining bits from a drill head used for drilling holes for roof support bolts in a mine were examined using a focused ion beam scanning electron microscope (FIB-SEM). This was combined with energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analyses to study the chemical interaction between the drill bit and the rock. It was found that at the surface of the buttons there was depletion of cobalt, change in chemistry of the remaining binder regions, and changes to the morphology of the WC grains. Tribochemistry calculations were done to understand the possible formation of silicides at the surface of the drill bits, and thus emphasise the importance of quartz content in rock on wear. The evidence of mechanical damage combined with chemical reactions is another step towards understanding the complete wear process in hardmetal mining tools.

Place, publisher, year, edition, pages
2017. Vol. 66, p. 1-10
Keywords [en]
Rock drilling, Impact wear, Hardmetals, Tribochemistry, X-ray diffraction, FIBSEM
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:uu:diva-339504DOI: 10.1016/j.ijrmhm.2017.01.013ISI: 000418222000001OAI: oai:DiVA.org:uu-339504DiVA, id: diva2:1175958
Available from: 2018-01-19 Created: 2018-01-19 Last updated: 2018-01-19Bibliographically approved

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Norgren, Susanne

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