一、前言目前铸造生产中最常见的球形件是磨球，由于球形件不易补缩，再加上球墨铸铁具有较强的糊状凝固特性，因此在铸造球铁磨球时，容易出现缩孔、缩松缺陷，使摩球在使用过程中发生偏球、破裂，导致过早失效。可见，正确进行球形球铁件的铸造工艺设计，对提高铸件的使用寿 I. Introduction At present, the most common spherical parts in casting production are grinding balls. Since spherical parts are not easy to be filled and the nodular cast iron has strong paste-like solidification characteristics, shrinkage cavities tend to appear when casting ductile iron balls , Shrinkage defects, so that the ball used in the course of ball game, rupture, leading to premature failure. Visible, the right ball spherical ductile iron casting process design, to improve the life of castings