Étude du choix structurel d'outils coupants en diamant revetu ou polycristallin massif pour l'usinage compétitif et environnemental des composites à matrice métallique et renfort céramique particulaire (CMMP AI/SiC.)

Abstract : The objective of this work is to study the machinability of CMMP as a structural material in substitution for refractory alloys and to understand the mechanisms generating dust related to their dry machining. The different levels of reinforcement of CMM (5, 15, 25, 35% of SiCp) and the variety of PCD tools and nanostructured diamond coatings studied, assessed in a first step the structural choice of tools in relationship with the industrial feasibility of their use in high speed dry machining of CMM Al / SiC. The feasibility study and recommendation tool were made taking into account different criteria: the energy, the structural and environmental quality. Damage modes and the performance of cutting tools have been observed and analyzed in tests of wear and durability. The presence of adhesive wear mode followed by an abrasive consumption interface increases the importance of the structure of the tool (homogeneity, multiple interfaces ...) The dust emission is finally analyzed in terms of structural modification of the composite material (heat treatment) and the reinforcement rate. Environmental sustainability of its machining is also assessed by an analysis of tool life. The process of dust generation is strongly related to tools behaviour, and the predominance of friction phenomena that arise at the tool / chip interface.
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https://pastel.archives-ouvertes.fr/pastel-00005407
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Submitted on : Tuesday, September 29, 2009 - 8:00:00 AM
Last modification on : Wednesday, November 29, 2017 - 9:42:52 AM
Long-term archiving on : Friday, September 10, 2010 - 1:44:33 PM

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Arnaud Kremer. Étude du choix structurel d'outils coupants en diamant revetu ou polycristallin massif pour l'usinage compétitif et environnemental des composites à matrice métallique et renfort céramique particulaire (CMMP AI/SiC.). Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2009. Français. ⟨NNT : 2009ENAM0009⟩. ⟨pastel-00005407⟩

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