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2017 №04 (10) DOI of Article
10.15407/as2017.04.01
2017 №04 (02)

Automatic Welding 2017 #04
Avtomaticheskaya Svarka (Automatic Welding), #4, 2017, pp. 5-10
 
Influence of metal structure of pipes on mechanical properties of flash-butt welded joints


 
 
Authors
S.I. Kuchuk-Yatsenko, B.I. Kazymov And V.F. Zagadarchuk
E.O. Paton Electric Welding Institute, NASU 11 Kazimir Malevich Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
Abstract
Technology of flash-butt welding occupies a sufficient place in different industries, including welding of different purpose pipes. At a high quality of joints the discrepancies in values of properties are observed in a number of cases. The paper considers the causes of such discrepancies and their relationship with the initial structure of metal of pipes. It was revealed that the formation of areas with a structural heterogeneity in joints is predetermined by the structure and volume of segregation bands of nonmetallic inclusions in steel and is not related to the technological parameters of welding. In welding of advanced pipe steels, produced by a controllable rolling, the required mechanical properties of the joints are provided. 10 Ref., 1 Table, 8 Figures.
 
Keywords: pipelines, flash-butt welding, quality of joints, nondestructive testing, standards, mechanical tests, bending tests, delaminations, cracks, nonmetallic inclusions, segregation bands, structural heterogeneity, rejection criteria
 
 
Received:                23.02.17
Published:               17.04.17
 
 
References
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  7. Kuchuk-Yatsenko, S.I., Shvets, Yu.V., Shvets, V.I. (2014) Influence of non-metallic inclusions in pipe steels of strength class X65–X80 on values of impact toughness of flash-butt welded joints. The Paton Welding J., 12, 2–7. https://doi.org/10.15407/tpwj2014.12.01
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  9. Kuchuk-Yatsenko, S.I., Shvets, V.I., Didkovsky, A.V. et al. (2013) Defects of joints of high-strength rails produced using flash-butt welding. The Paton Welding J., 9, 2–8.
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