(1. 西安交通大學(xué) 理學(xué)院, 西安 710049；
2. 太原科技大學(xué) 材料分院, 太原 030024)
摘 要: 建立了單輥快淬凝固過(guò)程的數(shù)值分析模型， 將真空室、 冷卻輥和樣品帶作為一個(gè)整體換熱系加以考慮， 以厚度為60 μm的Cu-25%Cr合金快淬帶為模擬對(duì)象， 對(duì)其凝固過(guò)程進(jìn)行了分析研究。 由冷卻曲線和溫度場(chǎng)曲線模擬結(jié)果可知， 帶子的凝固時(shí)間為1.0×10-4 s； 單輥快淬的平均冷卻速度在106 K/s數(shù)量級(jí)， 且凝固潛熱的釋放不會(huì)明顯地引起冷卻過(guò)程的溫度回升； 帶子的凝固速度在0.010~0.394 m/s范圍之內(nèi)隨凝固時(shí)間的延長(zhǎng)逐漸由大變小。 通過(guò)比較模擬結(jié)果和實(shí)驗(yàn)結(jié)果， 且參考已有研究結(jié)論， 證明了該模型的正確性， 得到了Cu-Cr體系的一些凝固規(guī)律和凝固參數(shù)。
關(guān)鍵字: CuCr合金; 凝固模擬; 快速凝固; 熔體快淬
（ 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
