Effects of alloy elements on ductility and thermal conductivity of compacted graphite iron

Dong-mei Xu; Gui-quan Wang; Xiang Chen; Yan-xiang Li; Yuan Liu; Hua-wei Zhang

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Effects of alloy elements on ductility and thermal conductivity of compacted graphite iron

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The infl uence of Si, Sn, Mo and Ni on the ductility and thermal conductivity of compacted graphite iron(CGI) was investigated. Metallographic observation and Differential Scanning Calorimetry(DSC) experiments were carried out to analyze the roles of various additions in the eutectoid reaction. The experimental results showed that the ductility of CGI is proportional to the ferrite fraction, so moderate Si content could dramatically improve the ductility by increasing the ferrite fraction. DSC measurements showed that Mo has moderate inhibition on eutectoid transformation during both the heating and cooling processes, while the sample without Sn obviously broadens the three-phase region. Vermicularity and ferrite are known to improve thermal conductivity, and the former plays a more important role. Besides, among the alloy elements investigated, Sn has the greatest negative effect on conductivity, followed by Ni and Mo having the smallest effects.

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来源
《中国铸造：英文版》 |2018年第3期|189-195|共7页
作者
Dong-mei Xu; Gui-quan Wang; Xiang Chen; Yan-xiang Li; Yuan Liu; Hua-wei Zhang;
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作者单位

School of Materials Science and Engineering;

Tsinghua University;

Beijing 100084;

China;

Key Laboratory for Advanced Materials Processing Technology (MOE);

Tsinghua University;

Beijing 100084;

China;

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原文格式 PDF
正文语种 chi
中图分类灰口铁;
关键词
compacted; graphite; iron; ductility; thermal; conductivity;

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Effects of alloy elements on ductility and thermal conductivity of compacted graphite iron

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