Specification of metal damageability mechanism of long-operated steam line welds
DOI:
https://doi.org/10.15587/1729-4061.2015.55420Keywords:
damageability, welded joints of steam lines, micropores, microcracks, diffusion, carbide phases, lifetimeAbstract
The features of metal damageability of welded joints of steam lines, long operated under creep conditions, made of steels 15H1M1F and 12H1MF were specified. Damageability classification, consisting of five stages was proposed. The formation mechanisms of creep pores and fatigue cracks were considered. It was found that creep pores are formed most intensively in the area of incomplete recrystallization of heat-affected zone of welded joints made of heat-resistant steels.
It was revealed that the metal destruction of welded joints has predominantly brittle intergranular nature. In the destruction area, the body of α-phase grains is affected by individual or locally grouped creep pores.
It was found that the origination and development of fatigue cracks on the inner surface of steam lines have locally grouped nature. Their development is characterized by the absence of branching.
Specification of metal damageability features of long-operated welded joints of steam lines will allow to reduce the damageability intensity, which provides increased lifetime.
References
- Hromchenko, F. A. (2002). Resurs svarnyh soedinenij paroprovodov. Moscow: Mashinostroenie, 351.
- Kumanin, V. I., Kovaleva, L. A., Alekseev, S. V. (1988). Dolgovechnost' metalla v uslovijah polzuchesti. Moscow: Metallurgija, 224.
- Panasiuk, V. V. (2002). Mekhanika ruinuvannia ta mitsnosti materialiv. Kyiv: Akademperiodyka, 376.
- Dmitrik, V. V., Pashhenko, A. N. (2003). Umen'shenie strukturnoj neodnorodnosti uchastka nepolnoj perekristallizacii ZTV svarnjah soedinenij perlitnoj stali. Avtomaticheskaja svarka, 7, 14–18.
- Dmitrik, V. V., Baumer, V. N. (2007). Karbidnye fazy i povrezhdaemost' svarnyh soedinenij pri dlitel'noj jekspluatacii. Metallofizika. Noveishye tekhnolohii, 7, 937–948.
- Zemzin, V. N., (1972). Zharoprochnost' svarnyh soedinenij. Leningrad: Mashynostroenye, 269.
- Dmitrik, V. V., Sobol', O. V., Pogrebnoj, M. A., Syrenko, T. A. (2015). Osobennosti degradacii metala svarnyh soedinenij paroprovodov. Avtomaticheskaja svarka, 7, 12–17.
- Berezina, T. G. (1986). Strukturnyj metod opredelenija ostatochnogo resursa detalej dlitel'no rabotajushhih paroprovodov. Teploenergetika, 3, 53–56.
- Dmitrik, V. V., Kalinichenko, V. I. (2003). Modelirovanie processa jelektrodugovoj svarki. Izvestija vuzov. Mashinostroenie, 4, 59–64.
- Dmitrik, V. V., Kalinichenko, V. I. (2002). Chislennye reshenija kraevyh zadach teorii jelektrodugovoj svarki na osnove shemy Galerkina. Dopovidi natsionalnoi akademii nauk Ukrainy, 5, 101–108.
- Ditjaev, B. D., Popov, A. B. (2001). Raschetno-analiticheskie i metodicheskie podhody k prodleniju sroka sluzhby paroprovodov TjeS. Teploenergetika, 4, 2–8.
- Humphreys, F. J., Hatherly, M, (1996). Recrystallization and related annealing phenomena. Oxford: Pergamon Press, 235–279.
- Hald, J. (2008). Microstructure and long-term creep properties of 9–12% Cr steels. International Journal of Pressure Vessels and Piping, 85 (1-2), 30–37. doi: 10.1016/j.ijpvp.2007.06.010
- Sawada, K., Takeda, M., Maruyama, K., Ishii, R., Yamada, M., Nagae, Y., Komine, R. (1999). Effect of W on recovery of lath structure during creep of high chromium martensitic steels. Materials Science and Engineering: A, 267 (1), 19–25. doi: 10.1016/s0921-5093(99)00066-0
- Abe, F. (2004). Coarsening behavior of lath and its effect on creep rates in tempered martensitic 9Cr–W steels. Materials Science and Engineering: A, 387–389, 565–569. doi: 10.1016/j.msea.2004.01.057
- Dmitrik, V. V. (2013). Svarnye soedinenija paroprovodov. Kharkov: Majdan, 163.
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Copyright (c) 2015 Виталий Владимирович Дмитрик, Татьяна Александровна Сиренко, Светлана Николаевна Барташ, Алена Валериевна Глушко
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