Subscribe to the EPMA Mailing List

The Influence Of Loading Spectrum, Workpiece Material, Hardmetal Grade And Drillbit Design On The Wear And Fracture Mechanisms Of Drillbits During Rotary-Percussive Drilling Of Reinforced Concrete: Experimental Studies And FEM

  • : Steven Moseley1, Siavash Momeni1, Carsten Peters1, Jan Allaart1
  • : 1Hilti AG
  • : PDF Download
  • : 2016

Abstract

The wear and fracture mechanisms of WC-Co hardmetal drillbits during rotary-percussive drilling of reinforced concrete vary greatly depending on 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 drillbit geometry (design and location on the drillbit). 

Clear differences in both 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 drillbit.

In this work, experimental studies supported by Finite Element Modelling (FEM) have documented, analysed and quantified the active wear (and fracture) mechanisms in this complex and challenging application. A wide range of experimental variables have been investigated and modelled, covering the large proportion of real-world cases being presented.

€25.00

Non-EPMA member price shown. If you are an EPMA member please log in for your discount.
If you are logged in as a member but are still seeing this message, please contact us at website@epma.com.
If you would like to find out about becoming an EPMA member, click here.
This product is currently only available to purchase via this website to companies with a valid EU VAT Number. If you are an individual or company without an EU VAT number wishing to purchase this, please contact EPMA directly at publications@epma.com. Alternatively, past Euro PM papers are available via ProQuest and Elsevier.
*
* This field is required

Other publications you may be interested in:

Go To Top