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Kronholz, 2010

Titel Diamantschleifsegmente zur trockenen Bearbeitung mineralischer Materialien
Autor/Autorin Kronholz, Christian
Verleger Essen : Vulkan-Verl.
Erscheinungsjahr 2010
Gesamttitel Werkstofftechnologische Schriftenreihe ; Bd. 2
Hochschulschrift Zugl.: Dortmund, Techn. Univ., Diss., 2010
ISBN 978-3-8027-8810-9
Sprache Deutsch (ger)
Schlagwörter Schneidkeramik; Diamant; Korund; Quarzglas; Teilchenverbundwerkstoff; Herstellung; Pulvermetallurgie; Temperaturverteilung; Werkzeugverschleiß; Mineralischer Werkstoff; Schleifen; Trockenbearbeitung
Bezugsquelle 31,50 € beim Vulkan-Verlag

ABSTRACT

This thesis looks at an innovative technology to lower the temperature of diamond segments during operation. This technique includes the addition of components with a low coefficient of thermal conductivity to the metal matrix, in order to eliminate water cooling of the tool.

The first part of this study analyzes the influence of the added heat damming particles (Al2O3, SiO2) of different grain sizes on the production process. Additionally, their impact on the final properties of the diamond segments was described. Porosity, microstructure analyses and the bending strength were determined as evaluation criteria. A further focus was on the identification of the phase boundaries of this heterogeneous material composite. X-ray diffraction analyses were carried out in order to examine the influence of the powder metallurgical production route on the chosen metallic binders (cobalt and bronze) and on the related transformations. Afterwards, a precise analysis of the phase region between the diamond and metallic binder as well as between the heat damming particles and the binder was conducted by means of transmission- and scanning electron microscope analyses. The findings were of major importance since the efficiency of the entire diamond segment is influenced by these factors.

Afterwards the effects of the additional particles on the heat distribution in the diamond segment were analyzed by a stationary setup as well as in grinding experiments under close-to-reality conditions. The wear behavior of these newly developed diamond segments and industrially produced segments was compared to each other. Finally, FEM-simulations were conducted and scrutinized to evaluate the heat distribution in the diamond segments close to the cutting edge and to test more heat damming materials and their effect on these newly designed diamond tools.


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