Effect of mould inoculation on formation of chunky graphite in heavy section spheroidal graphite cast iron parts
Effect of mould inoculation on formation of chunky graphite in heavy section spheroidal graphite cast iron parts
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DOI：
10.1179/136404608x286138
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发表时间：
2007-12-01
影响因子：
1.4
通讯作者：
Lacaze, J.
中科院分区：
文献类型：
--
作者：
Asenjo, I.;Larranaga, P.;Lacaze, J.
大型球墨铸铁铸件的制造过程受到缓慢冷却速率下石墨变性风险的强烈影响。这种缺陷的出现通常与大型铸件机械性能的显着降低有关。关于孕育对厚截面中块状石墨形成的影响的研究导致了文献中相互矛盾的结果，这引发了本研究。提出了关于结晶器孕育对球墨铸铁凝固过程中块状石墨外观的影响的新实验数据，这些数据清楚地表明，结晶器孕育增加了厚截面中形成块状石墨的风险。这与之前审查的一些著作是一致的，并且表明与其他结果的矛盾可能与这些后面的著作涉及冷铸的事实有关。
The manufacturing process of heavy section ductile iron castings is strongly influenced by the risk of graphite degeneration under slow cooling rates. Appearance of this kind of defect is commonly linked to significant reductions in the mechanical properties of large castings. Studies on the effect of inoculation on chunky graphite formation in heavy sections have led to contradictory results in the literature and this triggered the present work. New experimental data are presented on the effect of mould inoculation on chunky graphite appearance during solidification of nodular irons which clearly demonstrate that mould inoculation increases the risk of chunky graphite formation in heavy sections. This is in agreement with some previous works which are reviewed, and it is suggested that the contradiction with other results could relate to the fact that these latter works dealt with chill casting.