In order to reduce shrinkage tendency of gray iron,it s the basic measure to adopt high carbon equivalent and make full use of graphitization expansion,and besides,following measures are also necessary: a) controlling rational inoculant amount;b) optimizing alloying process;c) dec.
要降低铸铁的缩松倾向,最根本的措施是采用高的碳当量,尽量发挥石墨化膨胀的作用,并且要:(1)控制合理的孕育量;(2)优化合金化的方法;(3)适当降低铁液浇注温度;(4)快速高温熔炼,减少铁液氧化。