Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지

The Effect of Alloying Elements and Heat Treatment on Mechanical Properties of ADI

ADI의 기계적 성질에 미치는 합금원소 및 열처리의 영향

  • Kim, Sug-Won (RASOM) ;
  • Han, Sang-Won (Faculty of Advanced Materials Engineering, Chonbuk National University) ;
  • Woo, Kee-Do (Faculty of Advanced Materials Engineering, Chonbuk National University)
  • 김석원 ;
  • ;
  • 우기도 (전북대학교 공과대학 신소재공학부, 신소재개발연구소)
  • Published : 1998.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of alloying elements(Mo, Cu, Ni) and austempering temperature conditions on the microstructural morphologies and mechanical properties in austempered ductile cast iron has been investigated. The austempering at $350^{\circ}C$ for 2hrs after austenitizing at $900^{\circ}C$ for 2hrs in all specimens with various alloying elements was optimum because the good combination of tensile and yield strength, hardness and impact value was obtained. The microstructures of these ADIs treated by a forementioned austempering condition are nearly a mixture type of needle and feathery bainite. Among those alloys, Mo-Cu alloyed DCI had the best optimum mechanical properties of hardness and toughness for automobile parts by austempering treatment for 2hrs at $900^{\circ}C$ followed by $350^{\circ}C$ for 2hrs.

Keywords