Communication Dans Un Congrès Année : 2024

Numerical simulation of the impact of gas type on supersonic gas flow in a VIGA atomizer for metal powder production

Résumé

Gas atomization is currently the main method of powder production for metal additive manufacturing. The Vacuum Induction Melting Gas Atomization (VIGA) is a close-coupled process used to produce spherical powders for all non-reactive materials melted by induction in a crucible. In this process, a supersonic gas jet impinges on a stream of molten metal, atomizing it into small droplets forming powders once solidification has taken place.

A numerical model is developed to simulate gas flow patterns through and downstream of the VIGA nozzle. The influence of the type of gas (argon or nitrogen) on gas flow behaviour in the atomization chamber is investigated. The results show that nitrogen provides a higher velocity than argon, reduces gas consumption in the system and could be beneficial for the production of smaller droplets. The underlying mechanisms and implications for operation of the atomizer will be discussed.

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Dates et versions

hal-05354247 , version 1 (12-11-2025)

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  • HAL Id : hal-05354247 , version 1

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Baraa Qaddah, P Chapelle, B. Dussoubs, Nicolas Rimbert, Alexandre Piaget, et al.. Numerical simulation of the impact of gas type on supersonic gas flow in a VIGA atomizer for metal powder production. Euro Powder Metallurgy 2024 Congress & Exhibition, Sep 2024, Malmö, Sweden. ⟨hal-05354247⟩
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