쉘 적층 주조 구상흑연주철의 기계적 성질에 미치는 주형 변수 및 주 합금 원소의 영향 = Effects of Mold Variable and Main Alloying Element on the Mechanical Properties of Ductile Cast Iron Poured into Shell Stack Mold

다국어 초록 (Multilingual Abstract)

The effects of mold variable and main alloying element on the mechanical properties of ductile cast iron poured into shell stack mold were investigated. The strength and hardness of with the smaller cross-section of the diameter of 6.25mm were higher than those of 12.50mm. On the other hand, the elongation of the former was lower than that of the latter. The strength and hardness of the specimens obtained from the center layer in the 5-story stack mold were the lowest and those for other specimens were increased with increased distance from the center. The elongation of those were the highest of all. The strength and hardness of the specimens obtained from the center layer were decreased the elongation was increased with the increased number of layers. The strength and hardness were increased and the elongation was decreased roughly with the increased amounts of reaidual magnesium and carbon content added, respectively. The strength and hardness were increased and the elongation was decreased roughly with the increased amounts of silicon content added to 2.45wt% and rather decreased with that to 2.85wt%. The effect of silicon content showed the opposite tendency to those of residual magnesium and carbon content.

참고문헌 (Reference)

1 M. Gagne, "The Sorelmetal Book of Ductile Iron" Rio Tinto Iron & Titanium Inc 23-45, 2004

2 W. F. Smith, "Structure and Properties of Engineering Alloy" McGraw - Hill Inc 353-361, 1993

3 E. L. Kotzin, "Metalcasting & Molding Processes" AFS 29-30, 1981

4 J. D. Mullins, "Ductile Iron I, Production" Rio Tinto Iron &Titanium Inc 1992

5 M. Hohansson, "Cast Iron" AFS 117-118, 1977