迄今,大多数铸造厂还采用传统的浇冒口工艺生产球铁件。结果是生产成本高,而且还不能防止铸件内形成二次收缩缺陷。 本文论述了球铁冷凝过程中的收缩特性,并举例如何利用控制压力冒口原理进行球铁件的工艺设计。应用新的冒口技术能够防止铸件的收缩缺陷,显著提高铸件工艺出品率。 To date, most foundries have produced ductile iron parts using the traditional pouring and spout process. The result is high production costs, but also can not prevent the formation of secondary shrinkage defects in the casting. This article discusses the shrinkage characteristics of the ductile iron during condensation and gives an example of how to design the process of the ductile iron using the principle of control pressure riser. The application of new riser technology can prevent shrinkage casting defects, significantly improve the casting process yield.