The factors which have an effect on the formation of a kind of defect called "iron thorn"on the large area of casting are discussed, and process parameters are presented for the process improvement.
根据铸件大面积铁刺缺陷的技术攻关，论述了造成铸件缺陷的影响因素，制定一套可行的工艺参数，对改进工艺参数有一定参考作用。
The technology of grinding ball by centrifugal casting, the rotational speed, the method for calculation of ingate area and factors influencing technological process were introduced.
介绍了离心铸造磨球的工艺，以及转速、内浇口断面积计算方法和影响工艺过程的因素。
Based on the study of composition and casting methods of the bronze artifacts unearthed from Qinghai area, this article dis - cusses the sources of those bronze products.
本文通过对青海地区青铜器的成份分析及其铸造方法的分析，对该地区发现的青铜器来源问题进行了探讨。
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