Content uploaded by Thomas Pabel
Author content
All content in this area was uploaded by Thomas Pabel on Sep 18, 2015
Content may be subject to copyright.
The effect of ultrasonic degassing on the quality and properties of components produced by low and high pressure die casting
Abstract
Introducing ultrasound in molten aluminium is known to be an efficient means of melt degassing without the need to use expensive gases and rotating parts. In this paper the performance of ultrasonic degassing with regard to the quality and tensile properties of cast parts is compared with conventional Ar rotary degassing for two common casting techniques, low-pressure and high-pressure die casting. A significant reduction in dross formation is observed after the ultrasonic degassing treatment than after the conventional Ar rotary degassing. The mechanical properties and porosity level of components produced by low pressure die casting and high pressure die casting after both degassing techniques are determined. The results show that the components produced after ultrasonic degassing have similar tensile properties and porosity level as the components degassed with the conventional Ar rotary degassing.
... Ultrasonic degassing is an alternative degassing method that revealed favourable results. The potential of this technology has been supported by several published studies, showing the effectiveness of the ultrasonic treatment in molten aluminium alloys [5][6][7][8][9][10][11][12]. Ultrasonic degassing uses ultrasonic vibrations to generate oscillating pressures in molten aluminium, producing cavitation phenomena and creating fine bubbles. ...
ResearchGate has not been able to resolve any references for this publication.