Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Development and Control Technology of Austempered Ductile Irons with High Strength and High Toughness for Automotive Cam Shaft.

고강도 ADI의 자동차용 캠사프트 개발

  • Kim, Jae-Yun (Dept. of Metallurgical Engineering, In Ha University) ;
  • Kang, Dong-Myoung (Dept. of Mechanical Engineering, In Ha University) ;
  • Ahn, Sang-Uk (Dept. of Mechanical Engineering, In Ha University) ;
  • Kim, Kwang-Bae (Dept. of Material Engineering, Hankuk Aviation University) ;
  • Kang, In-Chan (Dept. of Metallurgical Engineering, In Ha University)
  • 김재윤 (인하대학교 금속공학과) ;
  • 강동명 (인하대학교 기계공학과) ;
  • 안상욱 (인하대학교 기계공학과) ;
  • 김광배 (항공대학교 항공재료공학과) ;
  • 강인찬 (인하대학교 금속공학과)
  • Published : 1991.06.20
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Abstract

The present study was conducted to estimate the fatigue crack growth rate of the Mo-Ni alloyed ductile cast iron for the influence of austempering temperature and time. The fatigue crack growth rate was affected by retained austenite. Retained austenite volume were higher with the ductile cast irons which were austempered at $360^{\circ}C$ than austempered at $260^{\circ}C$, and the fatigue crack growth rate of the former was lower than that of the latter. Also, the fatigue growth rate of the former was the lowest at austempering for 1 hour and that of the latter was the lowest at austempering for 3 hours.

Keywords