最近几年来为了进一步提高球墨铸铁性能,除了加强热处理工艺控制外,在化学成份方面提出了高碳低硅低磷的要求。但在实际生产中,球化处理好的球墨铸铁,由于取样的方法不同,碳的成份差异很大,有时球铁中的碳含量比原铁水中碳含置降低了1.2～1.4%,造成熔化配料工作中的一些错觉,铁水加镁处理之后,磷的含量是能降低的,最高的可达32.7%,这对提高球铁质量是有帮助,但过去未能很好的引起铸 In recent years in order to further improve the performance of ductile iron, in addition to strengthening the heat treatment process control, the chemical composition of the proposed high-carbon low-silicon and low phosphorus requirements. However, in actual production, due to the different sampling methods, the composition of carbon is very different. In some cases, the content of carbon in the ductile iron is reduced by 1.2-1.4% compared with that in the original molten iron, resulting in melting Some misconceptions in the work of the ingredients, the molten iron magnesium treatment, the phosphorus content can be reduced, the highest up to 32.7%, which is to improve the quality of ductile iron is helpful, but in the past failed to cause a good cast