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

被引：0

作者：

Dongmei Xu ^{[1
]}

Guiquan Wang ^{[1
]}

Xiang Chen ^{[1
,2
]}

Yanxiang Li ^{[1
,2
]}

Yuan Liu ^{[1
,2
]}

Huawei Zhang ^{[1
,2
]}

机构：

[1] School of Materials Science and Engineering,Tsinghua University

[2] Key Laboratory for Advanced Materials Processing Technology (MOE),Tsinghua University

来源：

ChinaFoundry | 2018年 / 15卷 / 03期

关键词：

compacted graphite iron; ductility; thermal conductivity;

D O I：

暂无

中图分类号：

TG143 [铸铁];

学科分类号：

080502 ;

摘要：

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.

引用

页码：189 / 195

页数：7

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