孕育对合金铸铁活塞铸件石墨分布的影响

Effect of Inoculation on Graphite Distribution in Alloy Cast Iron Pistons

试验研究了孕育剂种类、添加量以及孕育方法对高强度合金铸铁活塞石墨分布情况的影响。结果表明:含Sr孕育剂对于高强度合金铸铁活塞的石墨化有较好的促进作用,有效改善了石墨等级和分布的均匀性。选取适当的孕育量并采取倒包随流孕育,在高强度合金铸铁活塞上取得了良好的效果。

The influence of the type and amount of inoculant,and inoculation method on the shape,amount and distribution of graphite in the alloy cast iron piston was investigated.The results show that the inoculant containing Sr has a better inoculating effect on the alloy cast iron with high strength.This inoculant can effectively improve the shape,and distribution uniformity of graphite in the alloy cast iron pistons via adding proper amount of inoculant in the alloy cast iron and choosing an effective stream inoculation process that pours iron melt from a ladle to another ladle before pouring into the molds.