The wear of WC-Co drill bits during rotary-percussive drilling of reinforced concrete
| Autor: | Steven Moseley, Jan Allaart, Siavash Momeni, Michael Ante |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Drill business.industry 020502 materials Rebar Drilling 02 engineering and technology Structural engineering Reinforced concrete law.invention 020303 mechanical engineering & transports 0205 materials engineering 0203 mechanical engineering law Drill bit Reinforcement business Intensity (heat transfer) |
| Zdroj: | International Journal of Refractory Metals and Hard Materials. 62:202-209 |
| ISSN: | 0263-4368 |
| DOI: | 10.1016/j.ijrmhm.2016.08.006 |
| Popis: | The wear mechanisms of WC-Co hardmetal drill bits during rotary-percussive drilling of reinforced concrete depend a number of factors such as the loading spectrum (thermo-mechanical stresses); workpiece material (type of concrete and reinforcement steel); hardmetal grade (WC-grainsize and Co-content); and drill bit geometry (design and location on the drill bit). Differences in wear mechanisms and wear intensity are evident, being highly dependent on the factors listed above. Additionally, the extreme conditions acting on the cutting edges during drilling of reinforcement steel (rebar) within the concrete induce significant microstructural and metallurgical changes within the near-surface regions of the drill bit. In this work, experimental studies have documented, analysed and quantified the active wear mechanisms in this complex and challenging application. A wide range of experimental variables have been investigated covering the large proportion of real-world cases encountered in the application of these drill bits on the construction site. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect