Abstract
The effect of Sc and Zr on the fluidity of A357 alloy was investigated using spiral fluidity resin sand molds. The results showed that the order of the fluidity was A357+Zr > A357+Sc > A357 > A357+Zr+Sc. The TDCP and the solidification temperature range were also discussed. With Sc and Zr addition, the TDCP and the solidification temperature range of the alloy were changed, which led to the changes of the fluidity. The order of TDCP was A357+Zr < A357+Sc < A357 < A357+Zr+Sc and the order of the solidification temperature range was A357+Zr < A357+Sc < A357 < A357+Zr +Sc. What’s more, △T2 (△T2=TP-TDCP, TP was pouring temperature) and △T1 (△T1=TN-TDCP, TN was α-Al nucleation temperature) were compared, and △T2 was better suited for fluidity investigation than △T1.
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