摘要
从形核理论出发,建立了金属结晶晶粒数的一般方程,利用VB编出的程序计算方程,并以Zn-5%Al合金为例对方程在不同冷却速度和润湿角因子下进行了计算分析。结果表明,金属确定后,当润湿角因子不变,晶粒数随着冷却速度的增大而增大,基本呈线性正比关系;当金属液在同一冷却速度下冷却时,晶粒数随着润湿角因子的增大而减小,晶粒数与润湿角因子基本呈以自然对数为底的负指数关系。
The general equation of the quantity of metal grain was established by the theory of nucleation. Taking Zn-5% Al lloy as an example, the equation was resolved at different cooling rate and wetting angle factor by VB program. The results show that when the wetting angle factor does not change for a given metal, the quantity of grains increases with increase of cooling rate and has a linear relation. At the same cooling rate, the quantity of grain decreases with increase of wetting angle factor and the relation between the quantity of grains and wetting angle factor is minus exponent with E-number.
出处
《铸造技术》
CAS
北大核心
2007年第1期27-29,共3页
Foundry Technology
关键词
晶粒数
晶粒数方程
冷却速度
润湿角因子
Quantity of grain
Equation of grain quantity
Cooling rate
Wetting angle factor
