Title
Influence of mold preheating and silicon content on microstructure and casting properties of ductile iron in permanent mold Influence of mold preheating and silicon content on microstructure and casting properties of ductile iron in permanent mold
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Physics
Source (journal)
Journal of iron and steel research, international. - -
Volume/pages
18(2011) :3 , p. 34-39
ISSN
1006-706X
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
The effects of the mold preheating and the silicon content of ductile iron on the percentage of carbides, graphite nodule counts and shrinkage volume were investigated. The results showed that the percentage of carbides and the shrinkage volume decreased when the mold preheating increased. The ductile iron with the carbon equivalent of 4.45% and the silicon content of 2.5% without any porosity defects was achieved when the mold preheating was 450 °C. Increasing the silicon content in the range of 2.1%3.3% led to the increase in graphite nodule count and graphite size and the decrease in percentage of carbides. It is due to the increase in induced expansion pressure during the graphite formation with the increasing of silicon content. The suitable condition for casting a sound product of ductile iron without the riser at the mold preheating temperature of 300 °C is the silicon content of 3.3% and carbon equivalent of 4.7%.
E-info
https://repository.uantwerpen.be/docman/iruaauth/863c5e/81db285c9f8.pdf