대한금속재료학회지 (Korean Journal of Metals and Materials)

  • 제49권2호
  • /
  • Pages.93-103
  • /
  • 2011
  • /
  • 1738-8228(pISSN)
  • /
  • 2288-8241(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
권호 표지
DOI QR코드

DOI QR Code

고질소 2상 스테인리스강의 고온 석출거동

High Temperature Precipitation Behavior of High-Nitrogen Duplex Stainless Steel

  • 배종인 (부산대학교 재료공학과) ;
  • 김성태 (한국기계연구원 부설 재료연구소) ;
  • 이태호 (한국기계연구원 부설 재료연구소) ;
  • 하헌영 (한국기계연구원 부설 재료연구소) ;
  • 김성준 (한국기계연구원 부설 재료연구소) ;
  • 박용호 (부산대학교 재료공학과)
  • 투고 : 2010.09.24
  • 발행 : 2011.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

Precipitation behavior of high-nitrogen duplex Fe-24Cr-7Mn-4Ni-4Mo-0.43N stainless steel aged at $850^{\circ}C$ was investigated using scanning transmission electron microscopy. Based on the analyses of selected area diffraction patterns, four kinds of precipitates (intermetallic sigma (${\sigma}$) and chi (${\chi}$), $Cr_2N$ and secondary austenite) were identified. At the ferrite/austenite phase boundary, the ${\sigma}$ phase and secondary austenite were formed via ${\alpha}{\rightarrow}{\gamma}+{\sigma}$ eutectoid reaction. The precipitation of $Cr_2N$ occurred at the austenite grain boundary as well as the interior of the ferrite. The intermetallic ${\chi}$ phase also formed within the ferrite and showed a cube-cube orientation relationship with the ferrite. Further aging produced a lamellar structure composed of $Cr_2N$ and austenite along the ferrite/austenite boundary and enhanced the precipitation of the ${\chi}$ phase. The crystallographic features of the precipitates were also examined in terms of the orientation relationship with the austenite or ferrite matrix.

키워드

과제정보

연구 과제 주관 기관 : 지식경제부

참고문헌

  1. H. D. Solomon and T. M. Devine, Proc. Conf. on Duplex Stainless Steels, (ed: R. A. Lula), p.693, ASM, Metal Park, Ohio, USA (1983).
  2. J. Charles, Proc. Conf. on Duplex Stainless Steels, (eds: J. Charles and S. Bernhardsson), p.3, Beaune, France (1991).
  3. K. Johansson, Proc. Conf. on Duplex Stainless Steels, (eds: J. Charles and S. Bernhardsson), p.13, Associazione Italiana Metallurgia, Venezia, Italy (2000).
  4. J.-O. Nilsson, Mater. Sci. Technol. 8, 685 (1992).
  5. J.-O. Nilsson, T. Huhtala, P. Jonsson, L. Karlsson, and A. Wilson, Metall. Mater. Trans. A 27A, 2196 (1996).
  6. T.-H. Lee, C.-S. Oh, H. N. Han, C. G. Lee, S.-J. Kim, and S. Takaki, Acta Crystallogr. B. 61, 137 (2005). https://doi.org/10.1107/S0108768104033919
  7. B. Weiss and R. Stickler, Metall. Trans. A 3A, 851 (1972).
  8. A. J. Ramirez, J. C. Lippold, and S. D. Brandi, Metall. Mater. Trans. A 34A, 1575 (2003).
  9. D. H. Jack, Mater. Sci. Eng. 13, 19 (1974). https://doi.org/10.1016/0025-5416(74)90017-2
  10. T.-H. Lee, S.-J. Kim, and Y.-C. Jung, Metall. Mater. Trans.A 31A, 1713 (2000).
  11. K. W. Andrews, D. J. Dyson, and S. R. Keown, Interpretation of Electron Diffraction Patterns, p.180, Adam Hilger, London (1971).
  12. S. H. Lee, B. H. Choe, T. H. Lee, S. J. Kim, K. B. Yoon, and S. H. Kim, J. Kor. Inst. Met. & Mater. 46, 9 (2008).