固态Cu-9P合金在液态铝中溶解过程的研究

Study on Dissolution Process of Solid Cu-9P Alloy in Liquid Aluminum

以固态Cu-9P合金(质量分数,%)为对象,研究了 973 K时固态Cu-9P在铝液内的溶解过程。通过静态溶解和水淬实验得到了保留溶解过程信息的凝固组织。采用ZEISS Axio Vert.A1光学金相显微镜、扫描电子显微镜(scanning electron microscope,SEM)对凝固组织进行了分析。研究发现,固态Cu-9P合金在铝液内溶解时,随着溶解时间的延长,固液界面上Cu-9P合金一侧易形成单相Cu3P,固液界面前沿富集有颗粒和层状的AIP。总结了固态Cu-9P合金在铝熔体的溶解过程,揭示了溶解速度慢的根本原因。

The solid Cu-9P alloy was as the research object, and the dissolution process of solid Cu-9P in molten aluminum at 973 K was studied. Through static dissolution and water quenching experiments, the solidification structure t hat retains the dissolution process information was obtained. ZEISS Axio Vert.A1 optical metallographic microscope and scanning electron microscope(SEM) were used to analyze the solidified structure. The results show that when the solid Cu-9P alloy is dissolved in molten aluminum, with the extension of the dissolution time, single-phase Cu3P is easily formed on the side of the Cu-9P alloy on the solid-liquid interface, and the front of the solid-liquid interface is enriched with particles and layered AlP. The dissolution process of solid Cu-9P alloy in aluminum melt was summarized, and the root cause of the slow dissolution rate was revealed.