한국주조공학회

The effect of C2Cl6 for preventing to the surface oxidation and ignition of molten Mg alloy was studied with metallographic analysis, X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The alloy used for this study was AM100A Mg casting alloy with high strength. In order to investigate the surface protective characteristic of this molten alloy by C2Cl6 addition, we added them into molten AM100A alloy at 700oC and then the melts were slowly cooled under a protective atmosphere of air containing Ar gas and C2Cl6 flux addition. The result found that the surface oxidation and ignition reaction of molten AM100A Mg alloy by adding C2Cl6 flux was more slowly occurred than that of the only a protective atmosphere of containing Ar gas with increasing time. This result was due to a dense protective film formed containing MgCl2 on surface of molten Mg alloy during casting and solidification. The MgCl2 was formed by a reaction of C2Cl6 with molten Mg.

Ignition, Protective film, C2Cl6 flux.