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http://dx.doi.org/10.3365/KJMM.2011.49.1.073

Weldability of Low-Carbon ASTM A356 CA6NM Martensitic Stainless Steel Casting for Power Plants  

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)
Publication Information
Korean Journal of Metals and Materials / v.49, no.1, 2011 , pp. 73-78 More about this Journal
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
alloys; welding; ductility; hardness test; cracking;
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  • Reference
1 F. Masuyama, ISIJ Int'l. 41, 612 (2001).   DOI   ScienceOn
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).   DOI   ScienceOn
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).   DOI   ScienceOn
7 J. C. Lippold and D. J. Kotecki, Welding Metallurgy and Weldability of Stainless Steels, 70, Wiley-Interscience, New York (2005).
8 T. Ogawa, H. Nakamura, and E. Tsunetomi, IIW Doc. No. II-C-677-82.
9 V. P. Kujampaa, T. K. Takalo, and T. J. I. Moisio, Met. Const. 12, 282 (1980).
10 C. D. Lundin, C. Y. P. Qiao, T. P. S. Gill, and G. M. Goodwin, Weld. J. 72, 189-s (1993).