Machining of Fibre and Particle-Reinforced Aluminium

Summary The machining of metal matrix composites causes problems because the tool wear, due to the hardness of the ceramic fibres and particles, is extremly high. The use of high speed steel tools (HSS) is not possible. Polycrystalline diamond (PCD) tipped tools are often necessary to guarantee a dimensional stability and an economic machining. To diminish the tool wear the relation of the particle size, the PCD-grain size and the feed rate is important. The application of a coolant or lubricant can effect a higher cool wear. In spite of the extreme tool wear the machining quality is often better than in the case of not reinforced aluminium.