Weitere Artikel dieser Ausgabe durch Wischen aufrufen
Translated from Metallurg, No. 9, pp. 98–104, September, 2014.
Simulation modeling is used in order to study metal structure in a heat-affected zone (HAZ) during submerged-arc welding. A correlation is established between low values of impact energy observed and features of HAZ structure formation during submerged-arc welding of low-alloy steel of strength category K70. It is shown that the appearance of brittle precipitates with an increase in content of the main alloying elements at large grain boundaries is a reason for low impact energy in the area of large HAZ grains during steel K70 welding. Development of these areas is connected with repeated heating (simulating a second pass during rolling) in a temperature range somewhat lower than the Ac1 point. A reduction in cooling rate in the first heating cycle (which corresponds to an increase in linear energy during welding) facilitates precipitate enlargement over grain boundaries. Multipass welding and a reduction in pass linear energy are recommended in order to exclude the formation of these areas and to improve and stabilize impact energy in a welded joint HAZ.
Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten
Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:
K. T. Corbett, R. R. Bowen, and C. W. Peterson, “High strength pipeline economics,” Proc. 13th Int. Offshore and Polar Engin. Conf., Honolulu, Hawaii, USA, May 25–30, 2003.
V. V. Rusakova and T. L. Lobanova, “Prospects for using high-strength pipes of category K65 (X80) for future gas transport projects,” Nauka Tekhn. Gaz. Prom., No. 1, 4–7 (2009).
M. Yu. Matrosov, L. Yu. Efron, V. I. Il’inskii, et al., “Use of accelerated cooling for increasing a set of mechanical properties and production properties of thick rolled product for manufacturing gas pipelines of considerable diameter,” Metallurg, No. 6, 49–55 (2005).
A. A. Nemtinov, A. M. Korchagin, A. G. Popkov, et al., “Simulation of manufacture of K70 strip for pipes of considerable diameter in a 5000 mill,” Metallurg, No. 11, 51–54 (2008).
Yu. D. Morozov, A. M. Korchagin,V. V. Orlov, et al., “Structure and properties of strip for large-diameter pipes made of steel of strength category X80–X100,” Metallurg, No. 3, 42–49 (2009).
T. N. Alekseeva, A. A. Kruglova, V. V. Orlov, et al., “Study of features of structure formation of high-strength lowalloy steels for pipes of considerable diameter with thermomechanical treatment,” Vopr. Materialoved., No. 1(49), 32–42 (2007).
V. V. Rybin, V. A. Malyshevskii, E. I. Khlusova, et al., “High-strength steel for main pipelines,” Vopr. Materialoved., No. 3(59), 127–137 (2009).
V. V. Rybin, V. A. Malyshevskii, E. I. Khlusova, et al., “Structure and properties of cold-resistant steels for structures of northern use,” Vopr. Materialoved., No. 1(45), 24–42 (2006).
G. A. Petrov and A. S. Tumarev, Welding Process Theory, Vysshaya Shkola, Moscow (1967).
V. A. Karkhin, V. V. Plochikhine, A. S. Ilyin, and H. W. Bergmann, “Inverse modelling of fusion welding processes,” in: Mathematical Modelling of Weld Phenomena, Money Publishing for the Inst. of Materials, Minerals and Mining, London (2002), Vol. 6, pp. 1017–1042.
I. V. Gorynin,V. V. Rybin,V. A. Malyshevskii, et al., “Main aspects of creating and using high-strength structural steel,” Vopr. Materialoved., No. 3(20), 7–21 (1999).
G. D. Motovilina, Yu. A. Pazilova, and E. I. Khlusova, “Effect of alloying on structure and properties of the heat-affected zone of a welded joint of high-strength chromium-nickel-molybdenum steel,” Vopr. Materialoved., No. 1(45), 54–63 (2006).
A. Yu. Ivanov, R. V. Sulyagin, V. V. Orlov, et al., “Study of the structure of heat-affected zone of a welded joint of steel strength class X80 after simulation modeling of heating effects,” Vopr. Materialoved., No. 1(61), 31–39 (2010).
A. S. Zubchenko, A. V. Fedorov, and Yu. V. Nechaev, “Study of reasons for welded joint cracking of thick-walled pressure vessels during subsequent heat treatment,” Svarka Diagnost., No. 2, 21–25 (2009).
- Modeling Heating Effects in the Heat-Affected Zone of High-Strength Pipe Steel K70 with Double-Pass Submerged Arc Welding
A. A. Kruglova
V. V. Orlov
D. M. Sharapova
- Springer US
in-adhesives, MKVS, Neuer Inhalt/© Zühlke, Technisches Interface Design/© scyther5 | Getty Images | iStock