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在杆状上Al-4.5％Cu合金铸件上测定了冷铁的冷却面积扩大系数,并对分块冷铁和整块冷铁作用效果进行比较,发现分块冷铁较整块冷铁具有较好的作用效果。在保证冷铁总体积相同,与铸件接触面积相同的条件下,分块冷铁冷却面积扩大系数kp与整块冷铁冷却面积扩大系数kz之间存在如下关系 kp-A·(kz-1)+kz其中A为无量钢常数.
In the Al-4.5% Cu alloy rod castings on the determination of the cooling area of the cooling coefficient of expansion factor, and chunks of chilled iron and chilled effect of the whole comparison, found chunks of chilled iron than chilled Good effect. Under the condition that the total volume of chilled iron is the same and the contact area of the castings is the same, the following relationship exists between the expansion coefficient kp of the cooling area of the chilled piece and the expansion factor kz of the cooling area of the chilled steel. Kp-A · (kz-1) + kz where A is the infinite steel constant.