本文对多元(RE,Al,Ca,Cu,Cr,Mn,Si)复合孕育剂进行了正交试验,优选了两种高强度灰铸铁孕育剂。对试验数据进行了回归分析,得出了一个具有一定显著性的铸铁强度与复合孕育剂各组元含量之间关系的回归方程。对优选出的两种复合孕育剂进行了重复试验,与传统孕育剂75FeSi 进行了比较,并在生产中验证了实验室的试验结果。 In this paper, orthogonal experiments were conducted on multiple inoculant (RE, Al, Ca, Cu, Cr, Mn, Si) inoculant. Two kinds of high strength gray cast iron inoculant were optimized. Regression analysis was carried out on the experimental data, and a regression equation with a certain significance on the relationship between the strength of cast iron and the content of each compound inoculant was obtained. The two kinds of compound inoculants were tested repeatedly and compared with the traditional inoculant 75FeSi, and the laboratory test results were verified in production.