Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis on Temper Embrittlement and Metastable Phase of Martensitic Stainless Steel

마르텐사이트계 스테인리스강의 템퍼 취성과 준안정상에 관한 분석

  • Lee, Gil Jae (Power Generation Technologies Development Institute, Korea East-West Power) ;
  • Choe, Byung Hak (Department of Metal and Materials Engineering, Gangneung-wonju National University) ;
  • Kim, Jae Hoon (School of Mechanical Engineering, Chungnam National University)
  • 이길재 (한국동서발전(주) 발전기술개발원 기술전문연구센터) ;
  • 최병학 (강릉원주대학교 신소재금속공학과) ;
  • 김재훈 (충남대학교 기계공학부)
  • Received : 2021.01.04
  • Accepted : 2021.01.13
  • Published : 2021.01.30
Download PDF
⟨ Previous Next ⟩

Abstract

The martensitic stainless steel has excellent corrosion resistance and higher strength by quenching and tempering heat treatment. It has been widely used as blade material due to these properties. The hardness and impact toughness of martensitic stainless steel depended strongly on tempering temperatures. The 12Cr martensite stainless steel (SS 410) tempered about 540℃ showed temper embrittlement. To know cause of temper embrittlement in terms of phase identification, a detailed analysis of electron diffraction patterns during TEM observations has been carried out on the <110>α-Fe and <113>α-Fe zone axes for temper embrittlement specimen. The double electron diffraction spots at 1/3(211) and 2/3(211) positions were observed. The lattice space between individual diffraction spots was about 3.5 Å and this value coincide with three times to α-bcc lattice space (1.17 Å). The area which found double diffraction spots was judged metastable "zone" similar to the omega phase and induced embrittlement of SS410 material.

Keywords

References

  1. Irvine, Crowe and Pickering : The Making Shaping and Treating of Steel, 9th ed, United States Steel Co, (1971) 1178.
  2. J. L. Dossett and G. E. Totten : ASM Handbook Heat Treating of Martensitic Stainless Steels, ASM International, (2014) 1730.
  3. N. Bandyopadhyay, C. L. Briant and E. L. Hall : Met. Tans, A, 16A (1985) 721. https://doi.org/10.1007/BF02814824
  4. M. Hayakawa, S. Matsuoka and K. Tsuzaki : J. Japan Inst. Metals, 43 (2002) 1758.
  5. R. M. Horn and R. O. Ritchie : Met. Trans. A, 9A (1978) 1039. https://doi.org/10.1007/BF02652208
  6. Jayanti S: Embrittlement during Tempering of Steels, 2019, http://www.engineeringenotes.com/metallurgy/steel/embrittlement-during-tempering-of-steelsmetallurgy/26210
  7. J. Yu and C. J. McMahon : Met. Trans. A. 11A (1980)
  8. B. H. Choe, H. S. Jang, B. K. Lee, K. R. Lim, Y. S. Na, Y. T. Hyun, S. E. Kim, Y. U. Kim and C. S. Park : Korean J. Met. Mater, 55 (2017) 453. https://doi.org/10.3365/kjmm.2017.55.7.453
  9. P. Zhang, Y. Chen, W. Xiao, D. Ping and X. Zhao : Progress in Natural Science: Materials International. 26 (2016) 169. https://doi.org/10.1016/j.pnsc.2016.03.004
  10. D. H. Ping, S. Q. Guo, M. Imura, X. Liu, T. Ohmura, M. Ohmura, X. Lu, T. Abe and H. Onodera : Scientific Reports. 8:14264. 1 (2018)
  11. U. B. Baek, B. H. Choe, J. H. Shim, Y. U. Kim, Y. S. Kim, S. S. Kim, S. H. Nam and K. Y. Hong : Korean J. Met. Mater, 53 (2015) 82. https://doi.org/10.3365/kjmm.2015.53.2.82