球墨或蠕墨铸铁的生产,国内外大多采用纯镁或稀土镁中间合金作为变质剂。本工作证实在铸造铁水电渣精炼工艺中采用直流供电制度,选用含镁、钙、稀土等元素氧化物的 CaF_2基渣系,可以使铁水直接球化或蠕化.本文探讨了铸造铁水电化学变质处理的热力学条件及变质处理机制,给出了控制铸铁中球化元素含量的部分工艺参数。 Nodular or vermicular graphite cast iron production, mostly pure magnesium or rare earth magnesium master alloy as a modifier at home and abroad. This work proves that DC power supply system is adopted in the process of casting molten iron-slag electroslag, and the CaF2-based slag system containing elemental oxides of magnesium, calcium and rare earth can be used to make the molten iron directly ball or vermiculite. Modification of the thermodynamic conditions and metamorphic treatment mechanism, given the cast iron in the control of some of the elements of the process parameters.