eutectic graphite

To solve the problem how to produce iron castings having hi-strength and thin-sections namely how to increase quantity of dendrites, how to reduce size of eutectic cells and graphite flakes, as well as how to strengthen the matrix under the condition of relatively high carbon equivalence.

要解决铸铁高强度化、薄壁化的问题，就是要在较高碳当量条件下，增加枝晶数量、细化共晶团、细化石墨和强化基体。

The eutectic cells of vermicular graphite were characterized by their irregular shapes, unequal dimensions and nonuniform distribution.

蠕墨共晶团具有外形不规则、尺寸不均一和分布不均匀的特点。

With the increase of Al content, the graphite content and eutectic graphite of solidifying structures deduce, graphite in primary phase has a tendency of spherical transformation.

随着Al含量的增加，凝固组织中的石墨含量有所降低，共晶石墨减少，初生相中石墨占多数并有球化的趋势；

The nucleation model of the hypoeutectic, eutectic and hypereutectic spheroidal graphite iron is developed considered with their solidification process respectively.

针对不同类型的球墨铸铁的凝固过程，建立了亚共晶、共晶和过共晶球墨铸铁的形核率计算模型。

The results show that when Al content is 4.25%, the graphite content is high, the eutectic graphite is the main morphology and the matrix of the alloy is single γ-Ni ( Al) solution.

结果表明：当Al含量为4.25%时，凝固组织中的石墨含量较高，且以共晶石墨形态为主，基体为单相-γNi（Al）；

EXPANDED GRAPHITE Using the Character of Volume Dilation of Cast Iron During Eutectic Reaction for Intensifying Self& Feeding Ability of Casting

利用铸铁共晶膨胀特点加强铸件自补缩能力