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一、绪言孕育处理是防止铸铁白口倾向的有效方法。关于孕育处理研究很多,有许多已经发表。一些研究结果认为,灰铸铁的孕育剂以含有钙及钡等周族元素的硅铁及硅钙孕育效果最好。钙及其同族元素在铁水中极难溶解,对凝固时石墨的结晶析出起极有效的作用。铁水中除碳和硫外,气体及悬浮夹杂物与孕育剂也容易起反应,值得注意。为使起孕育作用的难熔的微量钙等元素发挥作用,以提高孕育效果,与钙容易起反应的气体和夹杂
I. INTRODUCTION Incubation is an effective way to prevent the tendency of white cast iron. There are many studies on inoculation, many have been published. Some studies suggest that gray iron inoculants contain calcium and barium and other peri-element ferrosilicon and calcium silicate best inoculation. Calcium and its congeners are extremely difficult to dissolve in hot metal and play an extremely effective role in the crystallization of graphite during solidification. In addition to carbon and sulfur in hot metal, gas and suspended inclusions and inoculants are also easy to react, it is noteworthy. In order to make the role of refractory trace elements such as calcium play an active role in order to enhance the effect of pregnancy, easy to react with calcium gas and inclusions