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


한국주조공학회지 (15권6호 558-565)

Effects of high Si-P Addition on Microstructure and Mechanical Properties of Thin Ductile Cast Iron

고 Si-P 첨가가 박육구상흑연주철의 미세 조직과 기계적 성질에 미치는 영향

Yong-Jin ParK*, Yang-Jin Choi*, In-Sun Park**, Young-Hwan Kim*, Hyo-Sang Lee*

*Hongik University, **college of incheon


Effects of high Si-P addition on microstructure and mechanical properties of thin ductile cast iron have been investigated. The amount of silicon addition have fixed on 4.0wt% and the amounts of phosphorus addition and thickness of specimen have been varied from 0.05 to 0.8wt% and ф13mm, ф10mm and ф6mm, respectively. As the casting thickness decreased, the average diameter of spheroidal graphite was decreased and the hardness of the cast iron increased. By adding P, the average diameter of spheroidal graphite was increased and the count of the spheroidal graphite was decreased continuously. And the tensile strength and the elongation was decreased, and the hardness was increased. With the P added more than 0.2wt%, the abraded amount was decreased significantly. The addition of P improved the wear resistance and the hardness of thin ductile cast iron.