Acknowledgement
Supported by : 한국학술진흥재단
Journal of the Korean Society for Heat Treatment (열처리공학회지)
- Volume 10 Issue 3
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- Pages.159-164
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- 1997
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- 1225-1070(pISSN)
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- 2508-4046(eISSN)
Casting of Ductile Cast Iron using Metal Mold and Improvement of Impact Toughness by Direct Tempering
금형주조법에 의한 구상흑연주철의 제조 및 직접 템퍼링에 의한 충격인성 향상
- Choi, Sung Bae (Dept. of Metallurgical Engineering, Korea University) ;
- Lee, Won Sik (Max-Planck Institut fur eisenforschung GmbH) ;
- Hong, Young Hwan (Dept. of Heat Treatment, Suwon Industrial College)
- Published : 1997.09.30
Abstract
Non-alloyed and 1.0%Ni alloyed ductile cast iron were cast into the sand mold and metal mold, and finer graphite size was obtained in case of metal mold casting. Direct tempering after casting showed the slight increase of absorbed energy, which is largely due to the relieving of residual stress that is developed during casting. After austempering heat treatment, higher impact energy was obtained in case of metal mold casting than sand mold casting, which is due to the finer graphite size.
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