· Aleaciones ligeras ·
Sang-Man Kim, Jung-Pyung Choi†, *Tae-Woon Nam, and Eui-Pak Yoon
Research Institute of Steel Processing & Application (RISPA), *Hanyang Univ., Ansan, Korea
67th World Foundry Congress
This paper investigates the effect of Bubbling and AlCuP on primary Si
size in Al-18%Si alloy. Bubbling process and AlCuP treatment are
effective for refining primary Si in hypereutectic Al-Si alloy. Both the
bubble and AlCuP can be used as nucleation sites of primary Si. Many
nucleation sites can make the size of primary Si decreased. So, this
experiment suggests that the mix using of bubbling process and AlCuP
treatment are more effective for nucleation site of primary Si. For deciding
the optimum treatment order, the experiments are processed 3 kinds of
order with varying stirring time and holding temperature; 1)AlCuP
treatment and then bubbling process, 2)simultaneously using of bubbling
process and AlCuP treatment, 3)bubbling process and then AlCuP
treatment.
