Construction of the Facility for Aluminium Alloys Electromagnetic Stirring During Casting

Morphology and Distribution of α-Al and Mn-rich Phases in Al-Si-Mn Alloys under an Electromagnetic Stirring

“…An electric furnace was used for alloys melting (min. 1.5 h at 800-805 °C) from pure components: Mn (99.98% NewMet House, Essex, UK), Si (99.9999% NewMet House) and Al (99.999% HMW Hauner GmbH & Co. KG, Röttenbach, Germany), without any modifier, with argon degassing and flushing the crucible [12]. The cylindrical sample diameter of 38 mm was determined by graphite crucible, whilst the height of 65 mm in order to keep similar cooling conditions (solidification time).…”

“…The cylindrical sample diameter of 38 mm was determined by graphite crucible, whilst the height of 65 mm in order to keep similar cooling conditions (solidification time). After 1.5 melting, the crucible filled with studied alloy was moved on the solidification position [12], where insulation (Fiberfrax, Unifrax, USA) allowed slow cooling and low temperature gradient, and electric coils were applied in order to generate melt flow during whole solidification. Temperature measurements [12][13][14][15] in the center and at the edge of sample and in the crucible, showed cooling rate R800-liq = 0.525 (K/s) and temperature gradient G800-liq = 0.194 (K/mm) without stirring.…”

“…The electric coils powered by autotransformer at frequency of 50Hz, voltage of 45V and electric current of 10A, generated rotating magnetic field (RMF) with 11 mT measured with Gaussmeter (MF100, Extech Instruments, US) [12].…”