한국재료학회지 (Korean Journal of Materials Research)

  • 제27권9호
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  • Pages.477-483
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  • 2017
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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600 MPa급 고강도 일반 및 내진 철근의 미세조직, 경도와 인장 특성

Microstructure, Hardness and Tensile Properties of 600 MPa-Grade High-Strength and Seismic Resistant Reinforcing Steels

  • 서하늘 (서울과학기술대학교 신소재공학과) ;
  • 이상인 (서울과학기술대학교 신소재공학과) ;
  • 황병철 (서울과학기술대학교 신소재공학과)
  • Seo, Ha-Neul (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Lee, Sang-In (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Hwang, Byoungchul (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 투고 : 2017.08.07
  • 심사 : 2017.08.21
  • 발행 : 2017.09.27
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초록

This present study deals with the microstructure and tensile properties of 600 MPa-grade high strength and seismic resistant reinforcing steels. The high strength reinforcing steel (SD 600) was fabricated by Tempcore processing, while the seismic resistant reinforcing steel (SD 600S) was air-cooled after hot-rolling treatment. The microstructure analysis results showed that the SD 600 steel specimen consisted of a tempered martensite and ferrite-pearlite structure after Tempcore processing, while the SD 600S steel specimen had a fully ferrite-pearlite structure. The room-temperature tensile test results indicate that, because of the enhanced solid solution and precipitation strengthening caused by relatively higher contents of C, Mn, Si and V in the SD 600S steel specimen, this specimen, with fully ferrite-pearlite structure, had yield and tensile strengths higher than those of the SD 600 specimen. On the other hand, the hardness of the SD 600 and SD 600S steel specimens changed in different ways according to location, dependent on the microstructure, ferrite grain size, and volume fraction.

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참고문헌

  1. S. Y. Lee, H. C. Lee, C. S. Park, K. M. Woo and Y. T. Suh, J. Korea Concrete Inst., 22, 28 (2010).
  2. A. N. Ivoditov, Y. U. N. Alekseev snd N. P. Kozlov, Steel in the USSR, 15, 297 (1985).
  3. P. Simon, M. Economopoulos and P. Nilles, Iron Steel Eng., 61, 53 (1984).
  4. P. Simon, M. Economopoulos and P. Nilles, Metall. Plant Technol., 84, 80 (1984).
  5. B. Hwang, J. H. Shim, M. G. Lee, J. Lee, J. H. Jung, B. S. Kim and S. B. Won, Korean J. Met. Mater., 54, 862 (2016). https://doi.org/10.3365/KJMM.2016.54.12.862
  6. K. T. Park, K. G. Jin, S. H. Han, S. W. Hwang, K. Choi and C. S. Lee, Mater. Sci. Eng. A, 527, 3651 (2010). https://doi.org/10.1016/j.msea.2010.02.058
  7. D. Porter, Phase Transformations in Metals and Alloys, 3rd ed., p.536, K. E. Easterling, CRC Press, USA (2009).
  8. Korean Standards Association, KS D 3504 (2016).
  9. S. Y. Eum, H. M. Park and T. W. Nam, J. Korea Foundry Soc., 20, 29 (2000).
  10. N. K. Park, H. S. Lee and Y. S. Chae, Korean J. Mater. Res., 17, 555 (2007). https://doi.org/10.3740/MRSK.2007.17.10.555
  11. C. M. Sellars and J. A. Whiteman, Met. Sci., 13, 101 (1979). https://doi.org/10.1179/msc.1979.13.3-4.101
  12. D. H. Ju, B. S. Jang, Y. M. Lim and J. H. Koh, J. Korea Academia-Industrial Cooperation Soc., 13, 1939 (2012). https://doi.org/10.5762/KAIS.2012.13.5.1939
  13. R. L. Bodnar and S. S. Hansen, Metall. Mater. Trans. A, 25, 665 (1994). https://doi.org/10.1007/BF02665443
  14. U. Helmersson, S. Todorova, S. A. Barnett, J. E. Sundgren, L. C. Markert and J. E. Greene, J. Appl. Phys., 62, 481 (1987). https://doi.org/10.1063/1.339770
  15. J. R. Patel and A. R. Chaudhuri, J. Appl. Phys., 34, 2788 (1963). https://doi.org/10.1063/1.1729812
  16. T. Kataoka and T. Yamada, Jpn. J. Appl. Phys., 16, 1119 (1977). https://doi.org/10.1143/JJAP.16.1119
  17. A. H. Chokshi, A. Rosen, J. Karch and H. Gleiter, Scripta Metall., 23, 1679 (1989). https://doi.org/10.1016/0036-9748(89)90342-6
  18. J. C. M. Li and Y. T. Chou, Metall. Mater. Trans., 1, 1145 (1970). https://doi.org/10.1007/BF02900225
  19. T. Gladman, Mater. Sci. Technol., 15, 30 (1999). https://doi.org/10.1179/026708399773002782
  20. H. Kubo, K. Nakamura, S. Farjami and T. Maruyama, Mater. Sci. Eng. A, 378, 343 (2004). https://doi.org/10.1016/j.msea.2003.10.359
  21. D. Hull and D. J. Bacon, International Series on Materials Science and Technology, 37, 248 (1984).