1、绪言在工厂的生产工序中,为确实得到具备FC30以上的强度及其它特性的铸铁,除严格进行铁水控制外,一般为改善材质进行充分的孕育处理。用添加合金的方法也是有效的。但是,从过去的试验结果看,其孕育效果的不同取决于孕育剂的种类。另外,由于添加了合金,因而担心造成组织的不均匀性和硬度的上升等。 1, Introduction In the production process of the factory, in order to obtain the cast iron with the strength of FC30 or more and other characteristics, besides strictly controlling the molten iron, it is generally necessary to give adequate treatment to improve the material. The method of adding an alloy is also effective. However, the results of past trials show that the effect of inoculation varies depending on the type of inoculant. In addition, due to the addition of the alloy, there is concern that the unevenness of the structure and the increase of the hardness may occur.