Quality of any cast material depends on a great extent on the amount of defects (porosity or cracks), which often suffers from gas porosity due to the presence of hydrogen in the molten metal. A clear example of this can be seen in the automotive sector (newly developed electric and hybrid vehicles where light-alloys play an important role in the vehicle weight thus affecting their autonomy).

a) Computed tomography and b) metallography of an UDIP SAMPLE. Red spots reflect hydrogen presence.

The current degassing techniques, based on the purge of a gas mixture through the melt have been proved to be expensive and harmulf to one’s health (often containing chlorine or fluoride) and have shown limited efficiency.

Ultragassing project targets at applying an ULTRASONIC DEGASSING TREATMENT on light-alloys, thus enhancing significantly the value of the components produced by the EU foundries in terms of safety and quality of their cast parts.

The main INNOVATIONS tackled within the project are the following:

  • Complete elimination of harmul and environmentally unfriendly gases
  • Elimination of rotational, porous and fragile contaminant components
  • Optimized scheme that allows short treatment time with maximum benefit
  • Applicability to both continous and batch processes
  • Applicability to a wide range of casting processes and liquid metals
  • Removal of oxides in addition to dissolved gases

“The research leading to these results has received funding from the European Union’s Seventh Framework Programme managed by REA-Research Executive Agency http://ec.europa.eu/research/rea (FP7/2007-2013) under grant agreement n° 286344″.