具有一定性能的铸态铁素体球墨铸铁可以免去热处理过程,节省能源,降低成本,是铸造工作者多年梦寐以求的事。影响球墨铸铁铸造时铁素体程度最大的因素是冷却速度和化学成分。化学成份中起影响最大的是C和Si,C、Si越高,石墨球个数就愈多。当冷却速度越快,壁厚越薄,其增加比例越大。壁厚一大, A certain performance of cast ferritic ductile iron can be removed from the heat treatment process, save energy and reduce costs, is the foundry workers years of dreaming. Affect the ductile iron casting casting the most important factor is the cooling rate and chemical composition. The most influential chemical composition is C and Si, C, Si, the higher the number of graphite balls. When the cooling rate is faster, the thinner the wall, the greater the proportion of increase. A big wall thickness,