ELECTROMAGNETIC AND THERMAL PHENOMENA IN THE CONTROLLED PHASE TRANSFORMATION MELTING PROCESS

Štefan Nagy - Mojmír Kollár

   This paper presents the electromagnetic and thermal phenomena during the melting process, with phase transformation control, of ferromagnetic alloys. The probes cast using this method will have a uniform structure, without micro-fissures. If the solid's part growth of the molten is controlled, we can stop the process that creates solidification centers, thus the material structure will be homogenous. A solution for this matter is given by the control of the solidification layer (phase transformation) using forced heating of the liquid part with eddy currents and forced cooling of the solid part. The evolution of the area with eddy currents and the cooled one, controls the phase transformation.

Keywords: eddy currents, electromagnetic field, thermal field, controlled phase transformation

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