Effect of Mold Hardness on Microstructure and Contraction Porosity in Ductile Cast Iron

被引：0
|
作者：
Jafar Khalil-Allafi
Behnam Amin-Ahmadi
机构：
[1] Sahand University of Technology,Faculty of Materials Engineering
[2] Sharif University of Technology,Department of Materials Science and Engineering
来源：
Journal of Iron and Steel Research International | 2011年 / 18卷
关键词：
ductile iron; graphite; preheating temperature; carbide; shrinkage porosity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The effect of mold hardness on the microstructure of ductile iron and the contraction porosity was investigated. Molds with different hardnesses (0.41, 0.48, 0.55, 0.62 MPa) and a sand mold prepared by Co2 method were used. The influence of silicon content on the induced expansion pressure owing to the formation of graphite was also investigated. The contraction during solidification can be compensated by an induced expansion owing to the graphite relief when the hardness of mold increases; therefore, the possibility of achieving a sound product without using any riser increases.
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页码：44 / 47
页数：3
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