本文在工厂常规配料(HT18—36)的条件下,针对小型柴油机薄壁机体铸件性能的提高,对不同Si/C值铸铁的孕育进行了研究。比较了多种孕育剂的效果,筛选出国内资源丰富的稀土类高效长效复合孕育剂,经现场批量生产试验,得到了高碳当量高强度优质薄壁灰铸件。 In this paper, under the condition of conventional ingredients (HT18-36) in the factory, the performance of castings of thin-walled diesel engine is studied, and the inoculation of different Si / C castings is studied. The effects of multiple inoculants were compared, and the domestic resource-rich rare earth efficient long-acting complex inoculant was screened out. Through on-site mass production test, the high-carbon equivalent high-strength and high-quality thin-walled gray castings were obtained.