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首页> 外文期刊>ISIJ international >Improved Analytical Method for Chemical Analysis of Cast Irons Application to Castings with Chunky Graphite
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Improved Analytical Method for Chemical Analysis of Cast Irons Application to Castings with Chunky Graphite

机译：块状石墨铸件中铸铁化学分析的改进分析方法

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摘要

Chunky graphite is a particular form of graphite degeneracy that appears in the centre of large iron castings, with a well-defined transition from the outer unaffected area and the inner affected one.All previous works that looked for macrosegration to explain the phenomenon concluded that there are no significant composition differences between the inner and outer parts of such castings.This was challenged again because the analytical methods generally used for chemical analysis are not efficient for low-level elements.Accordingly, an ICP-MS procedure has been developed and validated to replace the usual ICP-OES method.Together with the usual methods for analysis of C, S and Si, this ICP-MS procedure has been applied to characterize chemical heterogeneities in a large block with chunky graphite in its centre, and to a standard part for comparison.It could be concluded that no macrosegregation has built up during the solidification process of the block investigated, i.e.that chunky graphite appearance is not related to any composition changes at the scale of the cast parts, in particular of elements known to affect graphite shape such as Ce, Mg, Sb, S,….
机译：块状石墨是石墨退化的一种特殊形式，出现在大型铸铁的中心，从外部未受影响的区域到内部受影响的区域都有明确的过渡，以前所有寻找宏观细分来解释这种现象的工作都得出结论：这种铸件的内部和外部之间没有明显的成分差异。这再次受到挑战，因为通常用于化学分析的分析方法对于低含量元素无效，因此，已经开发并验证了ICP-MS方法与常规的ICP-OES方法一起使用，该ICP-MS方法与C，S和Si的常规分析方法一起用于表征中心为粗大石墨的大块中的化学异质性以及标准件可以得出结论，在所研究的块的凝固过程中没有建立宏观偏析，即块状的粗粒亚铁矿的外观与铸件的尺寸，尤其是已知影响石墨形状的元素（例如Ce，Mg，Sb，S等）的成分变化无关。

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  • 来源
    《ISIJ international》 |2011年第2期|p.242-249|共8页
  • 作者

    Susana MENDEZ; David LOPEZ; Iker ASENJO; Pello LARRANAGA; Jacques LACAZE;

  • 作者单位

    Chemical Department, AZTERLAN, Aliendalde Auzunea 6, E-48200 Durango (Bizkaia), Spain.;

    Chemical Department, AZTERLAN, Aliendalde Auzunea 6, E-48200 Durango (Bizkaia), Spain.;

    Engineering and Foundry Department, AZTERLAN, Aliendalde auzunea 6, E-48200 Durango (Bizkaia), Spain.;

    Engineering and Foundry Department, AZTERLAN, Aliendalde auzunea 6, E-48200 Durango (Bizkaia), Spain.;

    CIRIMAT, Universite de Toulouse, ENSIACET, BP 44362, 31030 Toulouse cedex 4, France.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nodular cast-iron chunky graphite chemical analysis segregation heavy section;

    机译：球墨铸铁块状石墨化学分析偏析重截面;

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