为降低冶炼成本，尝试以废钢为主要原材料，辅以铸造生铁和回炉铁，用中频感应电炉熔炼铁液，通过添加 增碳剂、合金元素（Cu）、孕育剂（FeSi75）和球化剂（FeSiMg8RE7）调整化学成分和球化效果，生产高强高韧球墨铸铁件。 结果表明：铸态下单铸试样抗拉强度≥700MPa，伸长率最高能够达到10%，球化等级2级，石墨大小≥6级，珠光体含 量≥90%，力学性能良好。 无碳化物、磷共晶、缩松缩孔、裂纹、加工硬化等质量问题，可实现批量化生产。

 In order to reduce the cost of smelting, scrap steel was used as the main raw materials, cast iron and recycled iron were used as auxiliary materials, and molten iron was smelted by medium frequency induction furnace, by controlling the recarburizer, alloy element (Cu), inoculant (FeSi75) and nodularizer (FeSiMg8RE7) was used to adjust the chemical composition and spheroidization effect to produce high-strength ductile cast iron. The results show that the tensile strength of single casting samples of as-cast condition is ≥700 MPa, the elongation can reach 10% , the spheroidization grade is II, the graphite size is more than VI, the pearlite content is ≥90%, and as-cast specimens have good mechanical properties. Mass production can be realized, and no carbide, phosphorus eutectic, shrinkage cavity, crack, work hardening, etc.