重点探讨了合成铸铁生产时增碳剂的加入方法、原铁液中的化学成分(C、Si、Mn)和增碳温度等对合成铸铁增碳吸收率的影响;同时对合成铸铁与非合成球铁的组织状况作了分析。结果表明:合成球铁比非合成球铁中的石墨球数多、细小且分布更为均匀;而且基体中的铁素体量略有增加,晶粒与珠光体片更为细小。 This paper focuses on the addition of carburizing agent in the production of synthetic cast iron, the influence of the chemical composition (C, Si, Mn) and the temperature of carbon addition on the carbon absorption of the synthetic cast iron. At the same time, Ductile iron organization was analyzed. The results show that the number of graphite balls in the composite ductile iron is more, smaller and more uniform than that in the non-composite ductile iron. Moreover, the amount of ferrite in the matrix slightly increases and the grains and pearlite sheets are smaller.