文献[1]、[2]指出,球墨铸铁的夹渣、皮下气孔、缩孔和缩松等缺陷,与铁水的残余镁量有十分密切的关系。自采用压力加镁球化处理后,镁的利用率显著提高,但与此同时,由于残余镁量过高,所导致的铸造缺陷就愈加明显,因此引起球墨铸铁生产部门的重视,大都从铸造工艺转向熔炼和球化处理来研究减少或防 Literature [1], [2] pointed out that ductile iron slag, subcutaneous pores, shrinkage and shrinkage and other defects, and the residual molten magnesium has a very close relationship. Since the use of pressure plus magnesium ball treatment, magnesium utilization increased significantly, but at the same time, due to the excess magnesium content, the casting defects caused by the more obvious, thus causing ductile iron production sector, most of the casting The process turns to smelting and spheroidizing to study reduction or prevention