The SEED technology: A new generation in Rheocasting

Permanent mould casting may be regarded as a near net shape manufacturing process where simple to very complex shaped engineering components are fabricated with high degree of precision in a metallic mould. In this group High Pressure Die Casting, HPDC, have attracted more attention because of its production rate, where both liquid and semisolid material (SSM) can be cast with a great degree of precision and versatility. In the HPDC of SSM processing, new process is described. The SEED process, Swirled Enthalpy Equilibration Device, consists of two steps: The initial step involves extracting specified amount of heat from the molten metal to generate liquid-solid slurry, i.e. mushy structure, followed by drainage of remaining liquid to produce a compact feedstock for rheocasting operation. In this paper microstructural evolution during the process and some initial casting result of automotive components also reported.S. Nafisi, O. Lashkari, R. Ghomashchi, J. Langlais, and B. Kulunkhttp://www.metsoc.org/conferences/com2005/symposia/schedule.as

Impact of swirling and superheat on microstructural evolution of 356 alloy in SEED slurry on-demand process

O. Lashkari, Sh. Nafisi, R. Ghomashchi, A. Charette, J. Langlais, B. Kulun