Effect of homogenisation treatment on segregation of silicon in ferritic ductile irons: A colour metallographic study
Effect of homogenisation treatment on segregation of silicon in ferritic ductile irons: A colour metallographic study
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DOI：
10.1179/026708399101506427
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发表时间：
1999-07
影响因子：
1.8
通讯作者：
C. Yeung;H. Zhao;W. Lee
中科院分区：
文献类型：
--
作者：
C. Yeung;H. Zhao;W. Lee
微观偏析强烈影响铁素体球墨铸铁的性能。尝试采用均化处理来减少这种偏析。偏析的严重程度可以通过微探针分析来确定，但该技术无法在更大范围内揭示偏析的形态。本研究的目的是探索使用彩色金相术定性和定量地揭示均质化处理过程中偏析的严重程度。彩色金相技术清楚地揭示了不同时间均匀化处理过程中硅偏析形貌的变化。量化树突间面积占总基质面积的比例。通过结合使用彩色金相技术和微探针分析，建立了铁素体球墨铸铁中颜色顺序差异与硅偏析程度之间的半定量关系。
Microsegregation strongly affects the properties of ferritic ductile irons. A homogenisation treatment was attempted to decrease such segregation. The severity of segregation can be determined with microprobe analysis, but this technique cannot reveal the morphology of segregation on a larger scale. The present investigation was undertaken to explore the use of colour metallography for revealing the severity of segregation both qualitatively and quantitatively during the homogenisation treatment. The modification of the morphology of segregation of silicon during homogenisation treatment for different times was revealed clearly by colour metallographic techniques. The proportion of interdendritic areas to the total matrix area was quantified. A semi-quantitative relationship between the difference in the sequence of colour and the degree of segregation of silicon in ferritic ductile iron was developed with the use of a combination of a colour metallographic technique and microprobe analysis.