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pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (11권3호 217-227)

Development and Control Technology of Austempered Ductile Irons with High Strength and High Toughness for Automotive Cam Shaft.

고강도 ADI의 자동차용 캠사프트 개발

Jae-Yun Kim*, Dong-Myoung Kang**, Sang-Uk Ahn**, Kwang-Bae Kim***, In-Chan Kang*

*In Ha University, **In Ha University, *** Hankuk Aviation Univensity

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℃ than austempered at 260℃, 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.

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