我们车间是以生产发动机铸件为主的铸铁车间。对于缸体、缸盖等灰铸铁件,金相组织和机械性能要求都比较高。过去我们使用含75％Si—Fe作灰铸铁件的孕育剂,能够起到促进石墨化,消除白口,细化组织作用。但孕育效果一般。为了提高灰铸铁件的质量,在不改变其他条件的情况下,我们试图从孕育剂上寻找提高灰铸铁质量的途径。因此,在生产试验中试用过硅钙、铬铁、锰铁、钛铁和稀土硅铁作孕育剂,发现稀土硅铁的孕育效果较好。通过 Our workshop is based on the production of engine castings cast iron workshop. For the cylinder block, cylinder head and other gray cast iron, the microstructure and mechanical properties are relatively high. In the past we used inoculant containing 75% Si-Fe as gray cast iron, which can promote the graphitization, eliminate the white mouth and refine the tissue. But the effect of breeding in general. In order to improve the quality of gray iron castings, we tried to find ways to improve the quality of gray cast iron from inoculants without changing other conditions. Therefore, in the production trial tried calcium silicate, ferrochrome, ferromanganese, ferrotitanium and rare earth ferrosilicon as inoculant found rare earth ferrosilicon inoculation effect is better. by