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


한국주조공학회지 (32권2호 81-85)

Effects of Section Size and Melt Holding on the Mechanical Properties and Microstructure of High Silicon Ductile Cast Iron

고규소 구상흑연주철의 기계적 성질 및 미세조직에 미치는 단면 크기 및 용탕 유지의 영향

Suk-Ju Lee, Ki-Ho Park, Sang-Hee Lee*, Hae-Wook Kwon**

Namyang Metals Co., *Korea Polytech VI CVI, **Yeungnam Univ.


The effects of section size and melt holding time on the mechanical properties and microstructure of high silicon ductile cast iron were investigated. The strength, elongation and hardness of the test specimen with smaller cross-section were higher than those with larger one. The nodule count and volume fraction of pearlite of the former were higher than those of the latter. The mechanical properties decreased with increased melt holding time before pouring. Nodularity and nodule count decreased and the volume fraction of pearlite rather slightly increased with it.


Cast iron, Ductile cast iron, High silicon ductile cast iron, Mechanical properties, Microstructure.