It is suggested to apply the principle of effective gravity and equivalent pressure head to calculate the rotational speed and ingate area in the processing of grinding ball by centrifugal casting.
在离心铸球工艺中，可应用有效重度和等效压头原理计算转速和内浇口断面积。
Measures of lowering the liquid steel superheat, decreasing the casting speed of bloom and reduction billet's secondary cooling strength are obviously effective to reduce such kinds of defects.
采取降低中间包的过热度，适当降低拉坯速度，减小铸坯的二次冷却强度等措施，对减少这种缺陷的出现有明显的效果。
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