离心力场制备高硅铝合金材料的组织特征研究

Microstructure of high-silicon aluminum alloys prepared by centrifugal force-field technology

采用高加速离心力场制备技术与金相分析手段,结合离心力场数学模型的建立与分析,揭示高硅铝合金材料的组织特征。结果表明:重度小的初晶硅颗粒向筒形件内侧迁移,大颗粒分布在最内侧,小颗粒分布在次内侧;重度大的含铁、镍等化合物颗粒向筒形件外侧迁移,大颗粒分布在最外侧,小颗粒分布在次外侧。而重度小的Mg2Si颗粒受形成条件的制约其分布特征与初晶硅相比有所不同。

The microstructure characteristics of high-silicon aluminum alloys were studied using high accelerating centrifugal forcefield technology, optical microscopy and mathematics models. The results show that the primary Si particles with small gravity coefficient move to the inner side of cylinder, the bigger particles move to the most inner side, and the smaller ones move to the next side; the compound with Fe, Ni and so on, which has big gravity, moves to the outside of cylinder, the bigger particles move to the most outside of cylinder, and the smaller ones move to the next side. But the distribution of Mg2Si phases with small gravity coefficient is different from that of primary Si particles because of the restriction of crystal condition.