在灰铸铁中经常遇到的气孔缺陷有“侵入性气孔”和“氢针孔”。这两类气孔缺陷易于被人们所认识,也易于采取消除措施。但在我厂低碳孕育铸铁的生产中,还遇到过另外两种形式的气孔缺陷。由于它们有特殊的形成机理和表现形态,往往难以鉴别和消除。这里想结合我厂的经验分析一下这两种类型气孔的形成机理及防止方法。 Stomatal defects often encountered in gray cast iron include “invasive pores” and “hydrogen pinholes.” These two types of stomatal defects are easily recognized and easy to eliminate. However, in our factory production of low-carbon inoculated cast iron, but also encountered two other forms of porosity defects. Because of their special formation mechanism and manifestation, it is often difficult to identify and eliminate. Here I want to combine the experience of our plant analysis of the formation of these two types of stomatal mechanism and prevention methods.