Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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A Study on the Complementary Alloying Design of Wear Resistant CV Graphite Cast Irons

내마모 CV흑연주철의 합금설계

  • Park, Heung-Il (Dept. of Production and Welding Eng., Pusan National University of Technology) ;
  • Kim, Woo-Yeol (Dept. of Production and Welding Eng., Pusan National University of Technology) ;
  • Bae, Cha-Hurn (Dept. of Materials Eng., Pusan National University of Technology) ;
  • Kim, Myung-Ho (Dept. of Metallurgical Eng., Inha University)
  • 박흥일 (부산공업대학교 생산가공공학과) ;
  • 김우열 (부산공업대학교 생산가공공학과) ;
  • 배차헌 (부산공업대학교 재료공학과) ;
  • 김명호 (인하대학교 금속공학과)
  • Published : 1993.08.30
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Abstract

The effects of alloying elements on the structure and mechanical properties of compacted/vermicular graphite cast irons containing copper, tin and molubdenum for producing pearlite matrix, and also containing phosphorus and boron for increasing wear resistance, were investigated. The Brinell hardness and ultimate tensile strength of the specimens with the range of compositions, [1.5% Cu-0.05% Sn-(0.2-0.4)% Mo-(0.2-0.6)% P-(0.035-0.070)% B], was found to fall within in the following range, depending on their composition; Brinell hardness of BHN 250-315, ultimate tensile strength of $28.1-40.3kg/mm^2$. It was also found within this experiment that CV graphite cast irons possessing higher amount of phosphide eutectic exhibit better wear resistance, but the wear resistance became deteriorate when the area fraction of phosphide eutectics exceed more than 10%. From these experimental results, it could be concluded that the CV graphite cast iron containing 1.5% Cu, 0.05% Sn, 0.4% Mo, 0.2% P and 0.035% B showed good mechanical and wear resistance properties.

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