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Meeting Liquid Metal Processing & Casting Conference (LMPC 2019)
Symposium Liquid Metal Processing & Casting
Presentation Title Numerical Modelling and Optimization of the Electrode Induction Melting for Inert Gas Atomization (EIGA)
Author(s) Sergejs Spitans, Henrik Franz, Egbert Baake
On-Site Speaker (Planned) Sergejs Spitans
Abstract Scope Electrode Induction Melting Inert Gas Atomization (EIGA) is one of the leading processes for manufacturing of high-quality titanium, zirconium, niobium and precious metal alloy spherical powders for use in aerospace, medical, energy, chemical, electronic and other industries. To study the EIGA process a numerical model for the electrode induction melting has been developed by means of coupling between the Lorentz force and Joule heat calculation in ANSYS and a transient heat transfer, melting and turbulent free surface flow calculation (including droplet detachment) in FLUENT. Parameter studies revealing the impact of the induction coil design and process conditions on the electrode melting behaviour (melting stability and regime, droplet size and superheat) will be presented. Finally, using numerical modelling we have successfully tailored our EIGA systems for atomization of new refractory materials with especially high melting temperatures like Tantalum (3017℃, 40mm) and ensured the further scale-up of established process (Ti-6Al-4V, 150mm).
Proceedings Inclusion? Definite: At-meeting proceedings

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Measurement of the Spatio-Temporal Distribution of Arcs During Vacuum Arc Remelting and their Implications on VAR Solidification Defects
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