한국주조공학회지 (Journal of Korea Foundry Society)
- 제10권4호
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- Pages.299-308
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- 1990
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- 1598-706X(pISSN)
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- 2288-8381(eISSN)
구상흑연주철의 강인화에 미치는 특수열처리와 합금원소의 영향
Effect of Special Heat Treatments and Alloying Element(Ni) on Strengthening and Toughening of Ductile Cast Iron
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Kim, Sug-Won
(Dept. of Metal. Eng. Chonbuk National University) ;
- Choi, Young-Seon (Dept. of Metal. Eng. Chonbuk National University)
- 발행 : 1990.08.20
초록
Ductile cast iron has a good ductility and ductility and toughness than those of gray cast iron, because the shape of graphite is spheroidal. It has been reported that the strengthening and toughening of the ductile cast iron was resulted from the good modification of various matrix structures obtained by the heat treatment or addition of alloying elements. This study aims to investigate the effect of various special heat treatment(Cyclic Heat Treatment, Intermediate Heat Treatment, Step Quenching), austempering and alloying element(Ni) on the strength and toughness of ductile cast iron. The results obtained from this study are summarized as follows. 1) With addition of Ni, the amount of pearlite or bainite were increased and the morphologies of pearlite or bainite became finer by special heat treatments. 2) As the Ni added and not added ductile cast iron were treated by austenitizing at
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