Journal of the Korean Society for Heat Treatment (열처리공학회지)

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

DOI QR Code

Carbide Precipitation Behavior During Normalizing Heat Treatment in Low-alloyed Cr-Mo-V-Ti Steel

Cr-Mo-V-Ti 저합금강에서 노멀라이징 열처리조건에 따른 석출물의 거동

  • Kim, Hong-Ki (Department of materials Science and Engineering, Pusan National University) ;
  • Na, Hye-Sung (Department of materials Science and Engineering, Pusan National University) ;
  • Lee, Sang-Hoon (Korea institute of materials science) ;
  • Kang, Chung-Yun (Department of materials Science and Engineering, Pusan National University)
  • Received : 2017.02.24
  • Accepted : 2017.03.14
  • Published : 2017.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

Heat treatment condition for dissolution of the M23C6 carbides in 2.25Cr-1Mo-V-Ti material for thermal power plant tube was investigated using a dilatometer method. 2.25Cr-1Mo-V-Ti material was heat-treated at $900{\sim}1,100^{\circ}C$ for 0, 10, 30 min to find the proper dissolution condition of M23C6 carbides. The phase identification and volume fraction of the carbide were measured by using OM, SEM, EBSD and TEM analysis. Optimal heat treatment condition of M23C6 carbide dissolution was selected by predicting dissolution temperature of carbide using Bs points appeared at dilatometer curve. Experimental results showed that the conditions of carbide dissolution was 900, 1,000, $1,100^{\circ}C$ for 30 min. Eventually, the optimal heat treatment condition for dissolution was 30 min at $1,000^{\circ}C$ considering the minimum coarsening of Austenite grain size.

Keywords

References

  1. IEA, World Energy Outlook, 96 (2015) 100.
  2. S. -H. Chang, B. -S. Kim and T. -K. Min : "Development of Ultra-Supercritical (USC) Power Plant." Transactions of the Korean Society of Mechanical Engineers B, 205 (2012) 210.
  3. 공병욱, et al: "특집: 초초임계 화력발전용 터빈 및 보일러 소재." 재료마당 24.2, 18 (2011) 26.
  4. 유석현, et al: "초초임계압 화력발전소의 고온화 에 수반되는 재료문제 해결방안." 대한기계학회 2003년도 압력기기 기술대회 논문 및 강연집, 5 (2003) 13.
  5. Evaluating Materials Technology for Advanced Ultrasupercritical Coal Power Plants, Power (2010) 41.
  6. R. Viswanathan and W. T. Bakker : "Materials for Ultra Supercritical Fossil Power Plants", 1-1 (2000) 2-15.
  7. Strader, Katherine C : Phase Transformation Behavior and Stress Relief Cracking Susceptibility in Creep Resistant Steels. Diss. The Ohio State University, 2014.
  8. Nawrocki, J. G., et al : Welding Journal 79.12, 355 (2000) 362.
  9. Hippsley, C. A., John Frederick Knott and B. C. Edwards : Acta Metallurgica 30. 3, 641 (1982) 654. https://doi.org/10.1016/0001-6160(82)90113-4
  10. Nawrocki, J. G., et al : Welding Journal, Newyork, 82.2 (2003) 25.
  11. MASUYAMA : "T23 and T24-new generation low alloyed steels." Coal Power Plant Materials and Life Assessment, Developments and Applications (2014) 87.
  12. J. G. Nawrocki, J. N. DuPont, C. V. Robino and A. R. Marder : Welding Journal, 80, Welding Re search Supplement, 18 (2001) 24.
  13. Brozda, J. B. : Welding International, 18,10. 761 (2004) 770. https://doi.org/10.1533/wint.2004.3341
  14. A. Dhooge and J. Vekeman : Welding in the World, 49, 75 (2005) 93. https://doi.org/10.1007/BF03266492
  15. Yu, Xinghua, et al : Acta Materialia 61.6 2194 (2013) 2206. https://doi.org/10.1016/j.actamat.2012.12.040
  16. K. Lee, S. Lee, H. Na and C. Kang : Materials Characterization 121, 31 (2016) 39. https://doi.org/10.1016/j.matchar.2016.09.018
  17. G. Golanski, J. Jasak and J. Slania : Kovove Materialy 52, 99 (2014) 106.
  18. B. Hahn : Properties and Fabrication. New Build &Maintenance. RAFAKO Seminar, 2009.
  19. Hirata, Hiroyuki, and Kazuhiro Ogawa : Materials at High Temperatures 27.3, 219 (2010) 226. https://doi.org/10.3184/096034010X1281977890495
  20. Oliveira, Fernando Lucas Goncalves, Margar eth Spangler Andrade, and Andre Barros Cota : Materials Characterization 58.3, 256 (2007) 261. https://doi.org/10.1016/j.matchar.2006.04.027
  21. Garcia de Andres C, Caballero FG, Capdevila C : Scr Mater, 38, 1835 (1998) 1842. https://doi.org/10.1016/S1359-6462(98)00131-6
  22. C. D. Lundin and S. Mohammed : Effect of welding conditions on transformation and properties of heataffected zones in LWR (light - water reactor) vessel steels. No. NUREG / CR-3873, ORNL / Sub--78-7637/1. Nuclear Regul atory Commission (1990).
  23. H. -S. Yang and H. K. D. H. Bhades hia : "Uncertainties in dilatometric determination of martensite start temperature." Materials Science and Technology 23.5, 556 (2007) 560. https://doi.org/10.1179/174328407X176857
  24. J. Arndt, K. Haarman, G. Kottmann, J. C. Vaillant, W. Bendick, G. Kubla, A. Arbab and F. Deshayes : The T23/T24 Book. New grades for waterwalls and superheaters, Information book from Vallourec & Mannesmann Tubes (1998).
  25. C. -Y. Chen, et al : "Microstructural characterization and strengthening behavior of nanometer sized carbides in Ti-Mo microalloyed steels during continuous cooling process." Materials Characterization 114, 18 (2016) 29. https://doi.org/10.1016/j.matchar.2016.01.023
  26. L. M. Fu, et al : Materials Science and Technology (2013).