基于半固态加入P对过共晶铝合金制备方法的研究

Based on semi-solid join P-the hypereutectic Al-Si alloy preparation methods of research

文章提出了一个在半固态时用磷做变质剂作为细化处理,磷在合金液中易与铝反应生产熔点较高的、细小的AlP化合物,作为Si结晶时的异质核心,促使原来熔液中硅晶胚和原子集团快速生长至晶核尺寸,故使熔液中晶核数量大增,实现细化目标。而过共晶型铝硅合金含硅量高达17%-26%,具有合金密度小,线膨胀系数低、抗磨、体积稳定性的特点,耐热、耐腐蚀性,是理想的活塞材料。

This paper proposes based on In semi-solid forming technology,phosphorus did refining treatment as the alterative,the reaction between phosphorus and aluminum in the liquid alloy was easy to produce small AlP compound with high melting point.As the heterogeneous core of Si crystallization,phosphorus prompted silicon embryos and atomic group in the original melting liquid rapid growing to the nucleus size,and becoming the nuclei,so that the number of nuclei was significantly increased in the molten,and the refined goal was achieved.and In hypereutectic Al-Si alloy,the content of silicon is up to 17%-26%,with the characteristics of small alloy density,low coefficient of linear expansion,good abrasion resistance,volume stability,good heat resistance and corrosion resistance,so hypereutectic Al-Si alloy is the ideal piston materials.