du.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Surface degradation mechanisms of cemented carbide drill buttons in iron ore rock drilling
Dalarna University, School of Technology and Business Studies, Materials Technology. Ångström Tribomaterials Group, Uppsala University. (Tribologi)
Dalarna University, School of Technology and Business Studies, Materials Technology. (Tribologi)ORCID iD: 0000-0002-4359-4967
Show others and affiliations
2017 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577Article in journal (Refereed) In press
Abstract [en]

The wear behavior of cemented carbide rock drill buttons is influenced by many factors, which include the composition and microstructure of the cemented carbide material, the nature of the rock material, and the conditions of the rock drilling operation. Depending on the type of rock and on the drilling procedure used, the cemented carbide is exposed to substantially differing mechanical and thermal conditions. In the present study, the surface degradation and wear mechanisms of cemented carbide drill buttons exposed to iron ore rock drilling have been characterized based on a combination of high resolution scanning electron microscopy (SEM), focused ion beam cross-sectioning (FIB), energy-dispersive X-ray spectroscopy (EDS) and electron back scatter diffraction (EBSD).The results show a significant difference in surface degradation and wear between the front and peripheral buttons of the drill bits. While the front buttons display a relatively smooth worn surface with shallow surface craters the peripheral buttons display a reptile skin pattern, i.e. plateaus, 200-300. μm in diameter, separated by valleys, typically 40-50. μm wide and 15-30. μm deep, The reptile skin pattern is obtained in regions where the peripheral buttons are in sliding contact against the drill hole walls and exposed to high surface temperatures caused by the frictional heating. The results indicate that the reptile skin pattern is related to friction induced thermal stresses rather than mechanical contact stresses, i.e. the reptile skin pattern is formed due to thermal fatigue, rather than mechanical fatigue, caused by the cyclic frictional heating generated at the cemented carbide button/iron ore interface.

Place, publisher, year, edition, pages
Elsevier Ltd , 2017.
Keyword [en]
Cemented carbide, Iron ore, Reptile skin, Rock drilling, Wear mechanisms, Atmospheric temperature, Carbide tools, Carbides, Degradation, Drills, Energy dispersive spectroscopy, Fasteners, Friction, Ion beams, Iron, Iron ores, Ores, Photodegradation, Rock drills, Rocks, Scanning electron microscopy, Stresses, Tribology, Wear of materials, X ray spectroscopy, Cemented carbides, Electron back scatter diffraction, Energy dispersive X ray spectroscopy, High-resolution scanning electron microscopies, Mechanical contact, Surface degradation, Surface temperatures
National Category
Materials Engineering
Research subject
Steel Forming and Surface Engineering
Identifiers
URN: urn:nbn:se:du-24700DOI: 10.1016/j.wear.2017.03.004Scopus ID: 2-s2.0-85015717944OAI: oai:DiVA.org:du-24700DiVA: diva2:1087893
Available from: 2017-04-10 Created: 2017-04-10 Last updated: 2017-04-10Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Olsson, MikaelYvell, Karin
By organisation
Materials Technology
In the same journal
Wear
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 206 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf