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Influence of the diamond size and diamond distribution on the wear behavior of sintered diamond-metal composites during the machining of reinforced concrete - Investigations by computer tomography and statistical evaluations

  • : Wolfgang Tillmann1, Dirk Biermann2, Claus Weihs3, Manuel Pinho Ferreira1, Michael Kansteiner2, Swetlana Herbrandt3, Jens Nellesen1
  • : 1Institute of Materials Engineering, TU-Dortmund, 2Institute of Machining Technology, TU-Dortmund, 3Chair of Computational Statistics, TU-Dortmund
  • : PDF Download
  • : 2015


Due to their outstanding wear resistance and hardness, diamond tools are mainly used for the machining of stone and concrete. These diamond cutting tools consist of small diamond grinding segments, which are fabricated powder-metallurgically. This production route combines a very ductile metallic binder component in which diamonds are embedded. Additionally, the sintering process of these composite materials offers a high degree of flexibility. The amount of diamonds, the grain size and the metal matrix powder used can be fully adapted to the materials’ characteristics of the machined concrete or stone. Although sintering and hot pressing are state of the art for the diamond tool production, the wear mechanisms on heterogeneous materials is difficult to evaluate with physical methods. Therefore, this paper focuses on a statistical method to investigate the influences of the diamond size, amount and the computer tomographically calculated diamond distribution on machining parameters such as wear and forces.


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