近来为了满足球铁产量逐年增长的要求,生产现场多半采用自动浇注工艺。铁水加Mg处理后要保持一段时间,故很有必要研究多少时间对球化有利,多少时间能获得予定的性能这些问题。另外,象原先一次铁水处理量大、浇注时间长的场合,难免要补加少量Mg,故也存在予期效果能保证多少时间之类的问题。为此,人们对Mg处理的衰退现象(亦称老化 In recent years, in order to meet the requirements of increasing the output of ductile iron, the production site mostly adopts the automatic pouring process. After hot metal and Mg treatment to maintain a period of time, it is necessary to study how much time is beneficial to the ball, how much time can be given the performance of these issues. In addition, as previously a large amount of hot metal treatment, pouring a long time of the occasion, it is inevitable to add a small amount of Mg, so there is the expected effect can guarantee how much time and the like. To this end, people decline treatment of Mg phenomenon (also known as aging