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.

• 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。