한국주조공학회지 (Journal of Korea Foundry Society)
- 제8권3호
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- Pages.296-309
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- 1988
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- 1598-706X(pISSN)
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- 2288-8381(eISSN)
고인(高燐), 고규소(高硅素) 구상흑연주철(球狀黑鉛鑄鐵)의 기계적(機械的) 성질(性質)에 관(關)한 연구(硏究)
A Study on the Mechanical Properties of High-P, High-Si Ductile Cast Iron
- 김하영 (대전공업대학)
- Kim, Ha-Young (Dept. of Metallurgical Eng. Taejon National Univ. of Technology)
- 발행 : 1988.09.30
초록
In this study the mechanical properties of ferritic ductile cast iron in as-cast are discussed by metallographic considering the effect of phosphorus content(about 0 - 0.8wt.%). In ferritic S.G. cast iron containing about 4.2wt.% Si, 0.5wt.% Ni, 0.02wt.%B, these samples are investigated for castability, microstructure, machinability, wear resistance, mechanical and thermal properties. The main results are summarized as follows. 1) The chill depth increased greatly with P addition up to about 0.6wt.% but the tensile strength and the elongation are decreased smoothly. 2) The size of S.G. and the amount of steadite increase with increasing P content. This means the tendency of increasing the number of S.G. 3) The maximum value of wear by mechanical fracture was appeared at the abrasion speed of 1.14m/sec and the plastic Flow layers are stretched longly on the wear surface with decreasing P content. 4) Although the coefficient of thermal expansion increased with P addition, the cast iron growth was slowing down extremely at 0.6w.% P or more.
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