Study on Preparation of Aluminum Phosphorus Modification Agent by High Temperature Dissolution Method and Its Modification Effect
Al-P alloy was prepared by high temperature dissolution method,and the average size of AlP was about 5 μm.The effect of cooling rate on the solidification microstructure of the Al-P alloy was studied.It was found that reducing the cooling rate would lead to the precipitation and growth of the AlP,which was not conducive to obtaining fine AlP.Increasing the cooling rate will lead to cracking of the AlP,which is conducive to obtaining finer AlP and is conducive to modification.The Al-P alloy had a good modification effect on hypereutectic Al-Si alloy,and could refine the primary silicon of the Al-15％Si alloy to 16.56 μm.
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