作者通过调整铸铁的化学成分——特别是改变硅碳比值,再加以适当的孕育和合金化的试验研究,获得了具有良好综合性能的高强度灰铸铁,为生产机床类零件和薄壁高强度结构零件提供了一种新的铸铁材质。文中讨论了硅碳比值对铸铁的强度、硬度、弹性模量、残余应力、精度稳定性、耐磨性及铸造工艺性的影响,指出Si/C比值为0.65-0.9时,即使较高的碳当量也能获得良好的综合性能。 By adjusting the chemical composition of cast iron - in particular, changing the ratio of silicon to carbon, coupled with proper inoculation and alloying experiments, high-strength gray cast iron with good overall properties was obtained. Structural parts provide a new cast iron material. The effects of Si / C ratio on the strength, hardness, elastic modulus, residual stress, precision stability, wear resistance and casting technology of cast iron are discussed. It is pointed out that even when the Si / C ratio is 0.65-0.9, Equivalent also get good overall performance.