利用电磁悬浮和快淬实验研究Cu60Co30Cr10合金在亚稳不混溶区的液相分离和快速凝固特征。结果表明,合金的显微组织为富(Co,Cr)相分布在富Cu相基体中,且富(Co,Cr)相颗粒的形状和大小随着冷却速率的变化而有明显的区别。在悬浮凝固条件下冷却速率较低,富(Co,Cr)相较粗大,有明显的聚集粗化趋势,富(Cu)相中有大量富(Co,Cr)相枝晶。而在快淬凝固条件下富(Co,Cr)相明显细化,富(Cu)相中未发现富(Co,Cr)相枝晶形成,这可能与较高的冷却速率、较大的过冷度和较高的界面张力有关。 Study on Liquid Phase Separation and Rapid Solidification of Cu60Co30Cr10 Alloy in Metastable Immiscible Region by Electromagnetic Suspension and Rapid Quenching. The results show that the microstructure of the alloy is rich in (Co, Cr) phase distributed in the Cu-rich matrix and the shape and size of the (Co, Cr) -phase particles are obviously different with the cooling rate. Under the condition of suspension and solidification, the cooling rate is low, the Co (Co, Cr) phase is coarse, the tendency of aggregation and coarsening is obvious, and a large amount of rich (Co, Cr) phase dendrite is present in the Cu-rich phase. On the other hand, the rich (Co, Cr) phase is obviously refined under fast quenching and solidification, and no (Co, Cr) phase dendrite is found in the Cu-rich phase. This may be related to the higher cooling rate, Coldness and higher interfacial tension.