Acknowledgement
Supported by : 포항종합제철 주식회사
Journal of the Korean Society for Heat Treatment (열처리공학회지)
- Volume 10 Issue 2
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- Pages.101-108
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- 1997
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- 1225-1070(pISSN)
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- 2508-4046(eISSN)
The Effect of Mn, Cr addition on Graphitization in High Carbon Steel
고탄소강의 흑연화에 미치는 Mn, Cr의 영향
-
Woo, Kee-Do
(Department of Metallurgical Eng., Chonbuk National University)
;
-
Kim, Sug-Won
(Department of Metallurgical Eng., Chonbuk National University)
;
- Kim, Dae-Young (Department of Metallurgical Eng., Chonbuk National University) ;
- Park, Young-Koo (Department of Metallurgical Eng., Chonbuk National University) ;
- Ryu, Jae-Hwa (Pohang Iron & Steel Co.,Ltd.)
-
우기도
(전북대학교 공과대학 금속공학과 신소재 기술연구소)
;
-
김석원
(전북대학교 공과대학 금속공학과 신소재 기술연구소)
;
- 김대영 (전북대학교 공과대학 금속공학과 신소재 기술연구소) ;
- 박영구 (전북대학교 공과대학 금속공학과 신소재 기술연구소) ;
- 류재화 (포항제철(주) 기술연구소)
- Published : 1997.06.30
Abstract
In high carbon steels, the cementite phase is more unstable thermally than graphite, and it can lead to a marked deterioration in the formability. Many studies have been carried out to evaluate the effect of the fundamental elements on the graphitization of cementite in high carbon steels. In this present work, the effect of Mn, Cr addition on graphitization in Fe-0.65%C-1.0%Si steel has been investigated by means of hardness testing, optical microscopy and EPMA. The nucleation of graphite may mostly depend on the dissolution rate of cementite into ferrite and the number of the nucleation sites of graphite. The graphitization was promoted by the addition of 0.1%Mn in high carbon steel, but retarded by more addition than 0.5% of Mn. By the more addition of Cr than 0.1%, the graphitization of high carbon steel was strongly retarded. Because Mn was moderate anti-graphitizer, but Cr was stroug anti-graphitizer.
Keywords