대한금속재료학회지 (Korean Journal of Metals and Materials)

  • 제49권12호
  • /
  • Pages.917-923
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  • 2011
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  • 1738-8228(pISSN)
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  • 2288-8241(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
권호 표지
DOI QR코드

DOI QR Code

V-Nb Microalloyed 강의 오스테나이트역에서 복합 탄질화물의 재용해 및 석출 거동

Dissolution and Precipitation behaviors of Complex Carbonitrides in Austenite of a V-Nb Microalloyed Steel

  • 하양수 (연세대학교 공과대학 신소재공학과) ;
  • 정재길 (연세대학교 공과대학 신소재공학과) ;
  • 이영국 (연세대학교 공과대학 신소재공학과)
  • Ha, Yangsoo (Department of Materials Science and Engineering, Yonsei University) ;
  • Jung, Jae-Gil (Department of Materials Science and Engineering, Yonsei University) ;
  • Lee, Young-Kook (Department of Materials Science and Engineering, Yonsei University)
  • 투고 : 2011.06.29
  • 발행 : 2011.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Dissolution and precipitation behaviors of complex carbonitrides in austenite of a V-Nb microalloyed steel were quantitatively examined through electrical resistivity measurement and transmission electron microscopy. The electrical resistivity increased with solution treatment temperature up to $1240^{\circ}C$ and then was saturated at $225n{\Omega}m$ for a holding time of 10 min. The electrical resistivity method was also used to quantitatively measure the isothermal precipitation kinetics of the complex carbonitrides in austenite. Nb-rich precipitates were observed in austenite at the early stages of precipitation, but Nb was replaced by V up to the equilibrium amount within the precipitates with further holding time. The time-temperature-precipitation diagram showed a C-type curve; nose temperature and its incubation time were $900^{\circ}C$ and 100 s, respectively.

키워드

과제정보

연구 과제번호 : 초고장력 H 형강 및 철근 기술개발

연구 과제 주관 기관 : 지식경제부

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