· Aleaciones ligeras ·
Soo-han Park and Bo-young Hur
Gyeongsang National University, S Korea
67th World Foundry Congress
The rheological characteristics are the most important factors in casting
process and metallic foam manufacturing especially. The surface tension
(by the ring method) and the viscosity (by the rotation method) of molten
Mg alloys (AZ91 and AM60) have been measured under pure Ar or SF6
+CO2 atmosphere. The surface tension and the viscosity of Mg alloys were
investigated in the temperature range of 600-850oC, and the effects of the
additional elements were investigated at the 660~680℃. The result show
that the surface tension and viscosity of these alloys decrease with
increasing temperature together. The viscosity of the AZ91 is about 6.12 ±
0.5 cp and AM60 is 4.91 ± 0.4 cp. The effect of additional elements has
the tendency that is the surface tension decreased and the viscosity increased.
