The results show that tensile strength is higher than that of 250 MPa,sensibility of section hardness is reduced to 20 HB and metallurgy quality is improved for the gray cast iron inoculated using 60%75SiFe+40%RE compound inoculants.

• 实验结果表明:孕育处理的铸件中,选择40%25稀土+60%2575硅铁复合孕育剂,灰铸件抗拉强度可稳定在250 MPa左右,并且断面敏感性可降低到20 HB,品质系数良好。