Microstructure and creep properties of high Cr resisting weld metal alloyed with Co |
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| Authors: | Xue Wang Liang-fei Zhan Qian-gang Pan Zhi-jun Liu Hong Liu Yong-shun Tao |
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| Affiliation: | (1) Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki Osaka, 567-0047, Japan;(2) Kobe Steel, Ltd., 100-1, Miyamae, Fujisawa Kanagawa, 251-8551, Japan |
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| Abstract: | A 9% Cr ferritic steel weld metal containing 1% Co, partially substituted for nickel, was prepared by submerged arc welding (SAW) processing. The microstructure and creep properties of the weld metal were investigated. The microstructure exhibited a fully tempered martensitic structure free of δ-ferrite. The creep properties of the obtained weld metal were inferior to those of the P92 base metal at 600 and 650 °C. The values of A and n for weld metal in the Norton power law constitution at 650 °C are 1.1×10−21 and 8.1, respectively. |
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| Keywords: | 9Cr steels Weld metal Microstructure Creep properties |
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