Effect of AlP master alloy on grain refinement of primary silicon in eutectic Al-Si alloys

Xigui Song, Xiufang Bian,Xiaogang Qi, Xiangfa Liu, Junyan Zhang, Baopei Wang, and Limin Zhu1) Laboratory of Liquid Structures and Heredity of Materials, Shandong University, Jinan 250061, China2) Shandong Bohai Piston Group, Binzhou 256631, China

摘 要：<正> To obtain the finer primary silicon crystals, the proprietary Al-P master alloy was adopted to modify the eutectic Al-Si alloys and the most suitable modification process was made in the experiments. The SEM （Scanning Electron Microscope） and DSC （Differential Scanning Calorimeter） analysis indicate that the Al-P modifier has more advantages over Cu-P and Fe-P modifier in easily addition, no elemental alteration and less undercooling of primary silicon’s solidification, which suggests the Al-P master alloy is an effective modifier of eutectic Al-Si alloys.

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