(1. 西安交通大学 理学院, 西安 710049；
2. 太原科技大学 材料分院, 太原 030024)
摘 要: 建立了单辊快淬凝固过程的数值分析模型， 将真空室、 冷却辊和样品带作为一个整体换热系加以考虑， 以厚度为60 μm的Cu-25%Cr合金快淬带为模拟对象， 对其凝固过程进行了分析研究。 由冷却曲线和温度场曲线模拟结果可知， 带子的凝固时间为1.0×10-4 s； 单辊快淬的平均冷却速度在106 K/s数量级， 且凝固潜热的释放不会明显地引起冷却过程的温度回升； 带子的凝固速度在0.010~0.394 m/s范围之内随凝固时间的延长逐渐由大变小。 通过比较模拟结果和实验结果， 且参考已有研究结论， 证明了该模型的正确性， 得到了Cu-Cr体系的一些凝固规律和凝固参数。
关键字: CuCr合金; 凝固模拟; 快速凝固; 熔体快淬
（ 1. Physics Institute, Xi'an Jiaotong University,
Xi'an 710049, China;
2. Materials Institute, Taiyuan Science and Technology University, Taiyuan 030024, China）
Abstract: The numerical simulation model of single roller melt-spinning for solidification process of Cu-25%Cr alloy was built, and the vacuum chamber, cooling roller and sample were taken into account as a holistic heat system. By the cooling curve and the temperature field, it can be known that, the solidification time of ribbon is 1.0×10-4 s, the even solidification rate of ribbon with 60 μm thickness is about 106 K/s, and the temperature of cooling process does not obviously go back by the release of solidification latent heat. The solidification rate of ribbon is at 0.010-0.394 m/s, and it changes from high to low with the prolonged solidification time. The simulative results are compared with the experimental and published ones, the validity of the model has been testified, some solidification rules and parameters of Cu-Cr alloys were firstly gotten.
Key words: CuCr alloy; solidification simulation; rapid solidification; melt-spinning
