, 55:424 | Cite as

Structure and properties of the heat-affected zone of steel strength class Kh80 pipes with different linear welding energy

  • A. Yu. Ivanov
  • R. V. Sulyagin
  • G. D. Motovilina
  • E. I. Khlusova

The effect of linear welding energy on the structure, mechanical properties, and brittle failure resistance of welded joints of pipe steel of strength class Kh80 is studied. Transmission electron microscopy (TEM) is used to establish features of structure formation in individual areas of the heat-affected zone. Results of studies make it possible to establish the range of linear welding energy providing preparation of the optimum set of properties for longitudinal joints of large diameter pipes made of steel of strength class Kh80.

Key words

pipe steel of strength class Kh80 heat affected zone phase transformations bainite transmission electron microscopy impact strength 


  1. 1.
    K. Hulka and J. M. Gray, “High temperature processing of line-pipe steels,” in: Niobium Science and Technology: Proc. Int. Symp. on Niobium, Dec. 2–5, 2001, Orlando, Florida, pp. 291–306.Google Scholar
  2. 2.
    M. Kh. Shorshorov, Metallurgy of Welding Steels and Titanium Alloys [in Russian], Nauka, Moscow (1965).Google Scholar
  3. 3.
    A. Yu. Ivanov, R. V. Sulyagin, V. V. Orlov, and A. A. Kruglova, “Evaluation of weldability of steel of strength class Kh80 for a large-diameter pipe,” in: Problems of Life and Safety for Materials and Construction Operations: Abstr. Int. Sci. Conf., Oct. 27–29, 2009, SPbGUNiPT, St Petersburg, pp. 243–248.Google Scholar
  4. 4.
    A. Yu. Ivanov, R. V. Sulyagin, V. V. Orlov, et al., “Study of the structure of a welded joint heat-affected zone of steel of strength class Kh80 after simulated model thermal action,” Vopr. Materialoved., No. 1 (61), 31–39 (2010).Google Scholar
  5. 5.
    H. K. D. H. Bhadeshia, Bainite in Steels: Transformation, Microstructure and Properties, 2nd edition, IOM Communications, London (2002).Google Scholar
  6. 6.
    A. Lambert-Perlade, A. E. Gourgues, and A. Pineau, “Austenite to bainite transformation in the heat-affected zone of a high-strength low-alloy steel,” Acta Materialia, 52, 2337–2348 (2004).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2011

Authors and Affiliations

  • A. Yu. Ivanov
    • 1
  • R. V. Sulyagin
    • 1
  • G. D. Motovilina
    • 2
  • E. I. Khlusova
    • 2
  1. 1.Izhora Pipe PlantSt. PetersburgRussia
  2. 2.Prometey Central Research Institute of Structural MaterialsSt. PetersburgRussia

Personalised recommendations