The Paton Welding Journal, 2007, №03

2007 №03 (06)

2007 №03 (08)

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The Paton Welding Journal, 2007, #3, 27-30 pages

Method for improving local damageresistance of welded joints in NPP pipelines

O.G. Kasatkin¹, A.K. Tsaryuk¹, V.Yu. Skulsky¹, A.R. Gavrik¹, S.I. Moravetsky¹, I.D. Kleshchevnikov², Yu.M. Kopylov², A.G. Medvedev²

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
²Khmelnitskaya NPP, Ukraine

Abstract
It is shown that the key factors causing corrosion cracking and fracture of composite welded Joints in pipelines include chemical and structural heterogeneity of metal of a welded Joint, formation of martensite and decarburised interlayers, stressed state and hydrogen-induced embrittlement of metal. The method is suggested for improving resistance of the welded Joints to local corrosion damages.
Keywords: pipelines, composite welded joints, structure, diffusible hydrogen, brittle interlayers, austenitic and carbon steels

References

1. Zemzin, V.N. (1966) Welded joints of dissimilar steels. Moscow: Mashinostroenie.
2. Kasatkin, O.G. (1994) Peculiarities of hydrogen brittleness of high-strength steels in welding (Review). Avtomatich. Svarka, 1, 3–7.

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Suggested Citation

O.G. Kasatkin, A.K. Tsaryuk, V.Yu. Skulsky, A.R. Gavrik, S.I. Moravetsky, I.D. Kleshchevnikov, Yu.M. Kopylov, A.G. Medvedev (2007) Method for improving local damageresistance of welded joints in NPP pipelines. The Paton Welding J., 03, 27-30.

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