在一定含量范围内，钛促进灰铸铁d型石墨的形成，改善灰铸铁石墨形态，并提高灰铸铁的强度性能。
In certain range of contents, titanium had the effect to promote formation of the D-type graphite, to improve the graphite morphology of gray iron and increase properties of gray iron.
研究了不同含硫量和不同冷却速度下铈、镧和钕对铸铁石墨形态和基体组织的影响。试验表明，不同的稀土元素在铸铁中的行为是不一样的。同时，硫和冷却速度对稀土元素的作用有重要的影响。
In this paper, effects of Ce, La and nd on graphite morphology and matrix structure in cast iron with various sulphur content and under various cooling rate have been studied.
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