Composite pistons for air compressor producing by mould casting method
Maciej Dyzia, Anna Dolata-Grosz, Jakub Wieczorek, Józef Śleziona, Michał Starczewski 1- 4 Politechnika Śląska, Wydział Inżynierii Materiałowej i Metalurgii, Katedra Technologii Stopów Metali i Kompozytów, ul. Krasińskiego 8, 40-019 Katowice, Poland 5 Złotecki Sp. z o.o., 88-111 Rojewo, Poland
Quarterly No. 2, 2007 pages 83-86
DOI:
keywords: aluminium alloy, ceramic particles, pistons, mould casting, structure
abstract The work concerns the possibility of application the composite materials in casts into metal mould to form the pistons for compressors. In cooperation with “Zlotecki” company was undertaken the test of casting in productive conditions the aluminium matrix composite reinforced with silicon carbide particles. In cycle of undertaken investigations were executed six composite pistons. All casts projected the shapes of mould exactly, and the preliminary evaluation of thickness and curvatures of sides fell out favorable. The conducted microstructural observations on the ground were affirmed the uniformly distribution of reinforcing particles on section of studied pistons. However it was observed the presence of porosity in structure, particularly in area of mould feeder. Porosity and agglomerates of particles be collected on internal sides of pistons. In turn the external areas, as and the structure of area opposite the feeder characterized the small porosity, about character of few emptiness the around evenly distributed ceramic particles. Both technological parameters and process of the matrix crystalization influence on the identified porosity. Realized technological tests confirmed the possibility of formation composite pistons from utilization the technology of mould casting.