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Effects of Alloying Elements and Heat-Treatment on the Tendency of Chill Formation of Ductile Cast Iron Produced by Metal Mold Cast  

Kim, Sug-Won (Division of New Material Engineering, RCIT, Chonbuk National University)
Park, Jin-Sung (Division of New Material Engineering, RCIT, Chonbuk National University)
Kim, Ki-Kon (Division of New Material Engineering, RCIT, Chonbuk National University)
Publication Information
Journal of Korea Foundry Society / v.27, no.1, 2007 , pp. 24-30 More about this Journal
Abstract
The effects of C, Si and RE additions on the tendency of chill formation of ductile cast iron obtained from metal mold casting were investigated. In case of metal mold cast, the ductile cast iron with 2.5%Si had pearlitic matrix, and specimens with 2.9%Si had bull's eye type regardless of C contents. As-cast specimen with a large amount of fine graphites could be obtained by adding 0.2% RE. Normalizing process was necessary to remove carbide and form a large amount of spheroidal graphites for the as-cast specimens. Good mechanical properties could be obtained by heat-treatment of as-cast specimens with pearlitic matrix. Normalizing the specimens with RE caused the reduction in mechanical properties.
Keywords
DCI (ductile cast iron); Nodule; Wear test; Tensile test; Rare Earth; Metal Mold; Normalizing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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