一、前言众所周知,球铁采用硅铁进行包内育往往容易产生孕育衰退,有时难以获得满意的孕育效果。为了提高球铁孕育效果,近十多年来在革新孕育方法和探索高效孕育剂方面取得了进展。型内孕育工艺就是新发展起来的孕育方法之一。资料介绍了国外采用FeSi进行球铁型内孕育的情况,结果表明它比包内孕育具有较好的孕育效果:石墨球数量增加,球径减小,球化率提高,从而使球铁机械性能有所提高。资料认为用纯硅或纯硅铁包内孕育时,通常只起很小的孕育作用,仅当硅铁中含有微量元素(为Al、Ca、Mn等)时,才有较好的孕育效果。资料指出, First, the preamble As we all know, ductile iron with ferrosilicon package is often prone to birth pregnancy recession, and sometimes difficult to obtain satisfactory inoculation effect. In order to improve the effect of ductile iron breeding, more progress has been made in the past ten years in reforming breeding methods and exploring efficient inoculants. Inoculation process is one of the newly developed methods of inoculation. The data of FeSi in foreign countries were introduced. The results showed that it had better inoculation effect than that of inocula: the number of graphite balls increased, the diameter of balls decreased and the rate of spheroidization increased. As a result, the mechanical properties of ductile iron has seen an increase. Data that pure or pure ferrosilicon fermented in the package, usually only play a small role in pregnancy, ferrosilicon only contains trace elements (for Al, Ca, Mn, etc.), have a better inoculation effect. According to the information,