Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Weldability of Low-Carbon ASTM A356 CA6NM Martensitic Stainless Steel Casting for Power Plants

발전용 저탄소 ASTM A356 CA6NM 마르텐사이트계 스테인리스 주강의 용접성

  • Bang, Kook-soo (Div. of Adv. Mat. Sci. & Eng., Pukyong National University) ;
  • Park, Chan (Div. of Adv. Mat. Sci. & Eng., Pukyong National University) ;
  • Lee, Joo-young (Casting & Forging Team, Doosan Heavy Industries) ;
  • Lee, Kyong-woon (Technical Research Laboratories, Doosan Heavy Industries)
  • 방국수 (부경대학교 신소재공학부) ;
  • 박찬 (부경대학교 신소재공학부) ;
  • 이주영 (두산중공업 주단소재기술팀) ;
  • 이경운 (두산중공업 기술연구원)
  • Received : 2010.06.30
  • Published : 2011.01.25
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Abstract

Weldability, especially HAZ cold cracking, weld metal solidification cracking, and HAZ liquation cracking susceptibilities, of ASTM A356 CA6NM martensitic stainless steel casting was investigated and compared with that of 9-12% Cr ferritic steel castings. Irrespective of the Cr and Ni content in the castings, the HAZ maximum hardness increased with an increase of carbon content. CA6NM steel, which has the lowest carbon content, had the lowest HAZ hardness and showed no cold cracking in y-slit cracking tests. CA6NM steel, meanwhile, showed the largest weld metal solidification cracking susceptibility in varestraint tests because of its higher amount of impurity elements, phosphorus, and sulfur. All castings investigated had good high temperature ductility in hot ductility tests and showed little difference in liquation cracking susceptibility.

Keywords

References

  1. F. Masuyama, ISIJ Int'l. 41, 612 (2001). https://doi.org/10.2355/isijinternational.41.612
  2. K. H. Mayer, R. Hanus, T. Kern, M. Staubli, and D. V. Thoronton, Proc. 6th Int'l Conf. on Mat. Adv. Power Eng., 71, Forschungszentrun Julich, Julich, Germany (1998).
  3. Y. Iwabuchi, M. Murata, S. Yamakuro, M. Yamada, and O. Watanabe, ISIJ. 76, 1060 (1990).
  4. W. J. P. Casas, S. L. Henke, and N. Novicki, Weld. Int'l. 23, 166 (2009). https://doi.org/10.1080/09507110802543344
  5. R. W. Loveless, W. C. Smith, and H. C. Templeton, ASTM STP 756, 394, ASTM, Philadelphia, Pa (1980).
  6. Y. Iwabuchi, Trans. ISIJ. 27, 211 (1987). https://doi.org/10.2355/isijinternational1966.27.211
  7. J. C. Lippold and D. J. Kotecki, Welding Metallurgy and Weldability of Stainless Steels, 70, Wiley-Interscience, New York (2005).
  8. V. P. Kujampaa, T. K. Takalo, and T. J. I. Moisio, Met. Const. 12, 282 (1980).
  9. T. Ogawa, H. Nakamura, and E. Tsunetomi, IIW Doc. No. II-C-677-82.
  10. C. D. Lundin, C. Y. P. Qiao, T. P. S. Gill, and G. M. Goodwin, Weld. J. 72, 189-s (1993).