Shape control of rectangular aluminum ingot by electromagnetic casting and its quality

Aluminum alloy ingots with various rectangular sections were fabricated by controlling the magnetic field which was changed by the inductance of external coil. The intensity of magnetic field which was increased greatly near the corner of rectangular electromagnetic coil was locally restrained by the corner screen. The effect of corner screen on the magnetic field distribution was clarified by the numerical analysis. The fabricated ingot had the lustered and smooth surface which was a typical feature for electromagnetic casting. The cross section of ingot resembled the inside shape of electromagnetic coil except for the ingot corner. The mechanical properties of fabricated ingot had little difference from DC cast.