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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (27권1호 24-30)

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

금형주조 구상흑연주철의 칠 형성 경향에 미치는 화학조성 및 열처리의 영향

Sug-Won K im *, Jin-Sung Park, K i-K o n K im

Chonbuk National University


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.


DCI (ductile cast iron),Nodule,Wear test, Tensile test, Rare Earth, Metal Mold, Normalizing.