摘要
利用自制的高纯铝定向凝固装置,研究了高纯铝定向凝固过程中固液界面的结构特性。结果表明:晶粒的形态决定了晶间的溶质浓度和偏析出的杂质元素向固液界面的排出速度,其径向分布与固-液界面相对应。由杂质元素分布图可以看出,使用电解铝液做提纯原料,在试验的工艺条件下,Ke值与K0值还有较大的差距,提纯效果的进一步提升需要精确设定温度梯度和冷却速率的工艺条件并有效稳定控制凝固过程的参数匹配。
A self-made high-pure aluminum directional solidification device is used to research the structure characteristics of solidliquid interface during solidification. The results show that the morphology of grain determines the solute concentration of the crystal and the discharge velocity of the impurity element to the solid-liquid interface, and its radial distribution is corresponding to solidliquid interface. It can be seen from the distribution diagram of impurity elements, using electrolytic aluminum liquid as the purification raw materials, under the condition of the test process, the Ke value and K0 value has larger gap, to further to improve the purification effect requires precise setting the process conditions of temperature gradient and cooling rate and stablely controlling of solidification process parameters matching effectively.
作者
戴飞
DAI Fei(Henan Zhongfu Industry StockCo.,Ltd.,Zhengzhou 451200,China)
出处
《铝加工》
CAS
2018年第3期4-8,共5页
Aluminium Fabrication
关键词
高纯铝
定向凝固
固-液界面
凝固速率
温度梯度
high-pure aluminum
directional solidification
solid-liquid interface
solidification rate
temperature gradient
