研究了高硫高强铸铁金属型铸造时，硫对白口化的作用和Ｓ／Ｓｉ值对退火时间及石墨形态的影响。结果表明合适的硅硫含量各为Ｓｉ＝２．０％～２．５％，Ｓ＝０．２％～０．４％，Ｓ／Ｓｉ＞０．１。指出了Ｓ／Ｍｎ值对石墨形态的重要作用，论述了硫的作用机理 The effect of sulfur on the whitening and the effect of S / Si on the annealing time and the morphology of graphite during casting of high sulfur and high strength cast iron were studied. The results show that suitable Si contents are 2.0% -2.5%, S = 0.2% -0.4% and S / Si> 0.1. The important role of S / Mn on graphite morphology is pointed out and the mechanism of action of sulfur is discussed