本文研究用稀土硅铁和SG变质剂作联合球化剂,而不用含镁的合金来处理球墨铸铁。试验结果表明:SG变质剂与稀土硅铁联合使用可以制成优质球墨铸铁。SG变质剂有着许多优点:具有强的脱氧脱硫作用,石墨球经细化,防止氧、硫回升和延缓球化衰退。对于大断面球墨铸铁件,有防止球化不良和消除反白口的作用。 In this paper, rare earth ferrosilicon and SG modifier for the joint nodulizing agent, without magnesium alloys to deal with ductile iron. The test results show that: SG modifier and rare earth ferrosilicon can be used in combination with high quality ductile iron. SG modifier has many advantages: a strong deoxygenation desulfurization, graphite ball through the refinement, to prevent oxygen and sulfur recovery and delay the decline of the ball. For large cross-section ductile iron pieces, to prevent bad ball and anti-anti-white mouth of the role.