Abstract
With the development of capacity and efficiency of coal-fired thermal power plant, the length of Low Pressure (LP) last-stage blade of steam turbine became longer. Therefore, the design static stress of blade gets closer or even higher than the yield strength of material. Because of the special operation condition of LP last stage blade, the stress corrosion crack of 12Cr-Ni-Mo-V-N Martensite stainless steel may happen especially at the root of the blade where designed the highest static stress. In this paper, the stress corrosion behavior of 12Cr-Ni-Mo-V-N Martensite stainless steels used for steam turbine LP last stage blade in 3vol% NaCl solution was studied, the constant stress is about 95%, 85%, 65% and 35% of yield stress respectively and the test was lasted for 3000 hours, the stress corrosion behavior was studied and then, the effect of shot penning strengthen for anti-stress corrosion property of 12Cr-Ni-Mo-V-N Martensitic steel was studied. The results showed that the purity of steel affects the stress corrosion behavior huge especially at the high and medium stress condition. The shot penning cannot enhances the anti-stress corrosion property of the 12Cr-Ni-Mo-V-N steel at high tensile constant stress condition, however it will make the anti-stress corrosion property better when the stress is low.
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Reference
J.Dong, J. Zhou, “An investigation of pitting initiation mechanism of 1Cr12Ni2W1Mo1V steel after induction hardening,” Journal of Materials Science, 35(2000), 2653–2657.
J.G. Gonzalez-Rodriguez, G. Bahena-Martinez, and V.M. Salinas-Bravo, “Effect of heat treatment on the stress corrosion cracking behavior of 403 stainless steel in NaCl at 95°C,” Materials Letters, 43(2000), 208–214.
H.Y.Ha, C.J.Park and H.S.Kwon, “Effects of non-metallic inclusions on the initiation of pitting corrosion in 11%Cr ferritic stainless steel examined by micro-droplet cell,” Corrosion Science, 49(2007), 1266–1275.
B.Lin et al., “A study on the initiation of pitting corrosion in carbon steel in chloride-containing media using scanning electrochemical probes,” Electrochimica Acta, 55(2010), 6542–6545.
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Tianjian, W., Yubing, P., Zhenhuan, G., Hua, F., Gongxian, Y. (2014). Stress Corrosion Behavior of 12Cr Martensite Steel for Steam Turbine LP Blade. In: Energy Materials 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48765-6_37
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DOI: https://doi.org/10.1007/978-3-319-48765-6_37
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48598-0
Online ISBN: 978-3-319-48765-6
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)