2017 №07 (02) DOI of Article
2017 №07 (04)

Automatic Welding 2017 #07
Avtomaticheskaya Svarka (Automatic Welding), #7, 2017, pp. 19-23
Structural changes in metal of welded joints of steam pipelines

V.V. Dmitrik1, A.V. Glushko1 and T.O. Sirenko2
1National Technical University «Kharkiv Polytechnic Institute», 2 Kirpichova Str., 61002, Kharkiv, Ukraine. Е-mail: svarka126@ukr.net
2Kharkiv Machine-Building College 79 Plekhanivska Str., 61068, Kharkiv, Ukraine
The structural changes in metal of welded joints of steam pipelines, operated for a long time under the creep conditions, predetermine the need in study of dislocation displacements, occurring in their structure. The paper deals with peculiarities of dislocation displacements, which cause the deformation of metal in regions of heat-affected zone of welded joints, and also with the dependence of deformational changes on the duration of their operating time. It was found that dislocation displacements and deformation of welded joints depend to a definite extent on their initial structure. 8 Ref., 8 Figures.
Keywords: welded joints of steam pipelines, structural changes, dislocation, carbides, heat-affected zone, deformation, diffusion, polygonization
Received:                07.04.17
Published:               01.09.17
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