Also the thermal gradients was out of condition around the area mentioned above, thus adequate liquids was needed to prevent the shrinkage and pouring-shortage issues.

• 从铸件充型和冷却过程的温度分布情况看，在铸件气道口附近的厚大区域，温度梯度分布不合理，出现孤立液相区的可能性很大，必须使冒口区域有充足的液相，才能防止出现缩孔、浇不足等缺陷。