Comparative study of two commonly used heat-treatment-free die-cast aluminum alloys
The C611 alloy developed by Alcoa and the Castasil 37 alloy developed by RHEIN-FELDEN in Germany were compared and studied.The results show that the solidification temperature range of Castasil 37 is smaller than that of C611,and the thermal cracking resistance is better,but the tempera-ture of the molten aluminum above 750 ℃ is required,otherwise it is easy to have cold separation.Castasil 37 has a finer and diffuse phase,higher tensile strength and yield strength,better elongation in vacuum die-casting,and C611 is insensitive to changes in wall thickness and vacuum conditions,and has better elongation.The thermal conductivity of the two alloys is the same at room temperature,and the thermal conductivity increases with the precipitation of solution alloy elements as the temperature in-creases.
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