• Title/Summary/Keyword: Ductile iron

Search Result 213, Processing Time 0.025 seconds

A Study on the Mechanical Properties of High-P, High-Si Ductile Cast Iron (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))

  • Kim, Ha-Young
    • Journal of Korea Foundry Society
    • /
    • v.8 no.3
    • /
    • pp.296-309
    • /
    • 1988

  • 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.

  • PDF

Effects of Alloying Element and Heat Treatment on the Mechanical Properties of Ductile Cast Iron Poured into Shell Stack Mold (쉘 적층 주조 구상흑연주철의 기계적 성질에 미치는 합금원소 및 열처리의 영향)

  • Kim, Hyo-Min;Kwon, Min-Young;Chun, Byung-Chul;Kwon, Do-Young;Kim, Gi-Yeob;Kwon, Hae-Wook
    • Journal of Korea Foundry Society
    • /
    • v.40 no.3
    • /
    • pp.76-84
    • /
    • 2020

  • The effects of Alloying Element and Heat Treatment on the mechanical properties of ductile cast iron poured into shell stack molds were investigated. The strength and hardness were increased and the elongation was decreased roughly with the increased amounts of tin and copper added, respectively. Those were greatly increased with the increased amount of tin added and the elongation was roughly decreased with it. In the simultaneous addition of copper and tin, the strength and hardness of the tin increased, but the elongation rate decreased. Those were greatly increased and this was decreased with normalizing. In the case of specimens with smaller section sizes during austempering processing, the strength and hardness were higher than those with larger sections, but the elongation rate was lower.

  • https://doi.org/10.7777/jkfs.2020.40.3.76 인용 PDF KSCI