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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (24권2호 85-93)

Effects of P Addition and Fading Time on the Primary Si Microstructure Changes of Hypereutectic Al-Si Alloy

과공정 Al-Si합금의 초정 Si 미세조직변화에 미치는 P 첨가와 fading 시간의 영향

Joo-Yul Park, Eok-Soo Kim*, Kwang-Hak Lee

Ulsan University, *Dong Nam precision Co.


Mechanical property of hypereutectic Al-Si alloy is changed according to size and distribution of primary Si. Consequently, the study on the refinement for primary Si is progressed for a long time. But such effect of refinement comes out fading phenomena with the lapse of time. Therefore, this study investigated the optimum condition of primary Si refinement for hypereutectic Al-Si alloy. And we observed various primary Si size with P's fading phenomena. The experiment results were as follows. For experiment of primary Si refinement, we made hypereutectic Al-Si alloy with various amounts of P addition. As a result of experiment, we obtained the fine microstructure at 0.01wt.%P. And the optimum condition of P addition, for preventing from growth of primary Si by P fading, is estimated 0.1wt.%P.


Hypereutectic Al-Si Alloy, Refinement, P Addition, Fading Time