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研究了不同冷却速度下 CuCr25 合金的微观组织和凝固过程。随着冷却速度的增加,CuCr25 合金的微观组织将变得越来越细。当冷却速度达到 107K/s 时, 可获得纳米结构的微观组织。当冷却速度<103K/s 时, CuCr25 合金的凝固过程为普通凝固过程;如果冷却速度>104K/s, 其凝固过程为液相分解凝固过程。在快速凝固过程中,CuCr25 合金中没有新相形成。但是,Cu 在富 Cr 相中和 Cr 在富 Cu 相中的溶解度有所增加。
The microstructure and solidification process of CuCr25 alloy at different cooling rates were studied. As the cooling rate increases, the microstructure of CuCr25 alloy will become finer and finer. When the cooling rate reaches 107K / s, nanostructured microstructure can be obtained. When the cooling rate is less than 103K / s, the solidification process of the CuCr25 alloy is an ordinary solidification process. If the cooling rate is more than 104K / s, the solidification process is the liquid phase decomposition and solidification process. During rapid solidification, no new phase was formed in the CuCr25 alloy. However, the solubility of Cu in the Cr-rich phase and Cr in the Cu-rich phase increases.