Advertisement

Metallurgist

, Volume 55, Issue 7–8, pp 489–495 | Cite as

Effect of heat treatment on mechanical properties and structure of high-strength pipe steels with a ferrite-bainite structure

  • M. Yu. Matrosov
  • O. P. Talanov
  • I. V. Lyasotskii
  • D. L. Dyakonov
  • E. I. Khlusova
  • V. V. Orlov
  • A. M. Korchagin
  • D. S. Tsvetkov
  • S. D. Popova
Article

Abstract

The effect of heat treatment on mechanical properties and microstructure of high-strength low-alloy ferrite-bainite pipe steels is studied. Specimens are heated in a laboratory furnace up to a temperature in the range 100–850°C. Dependences for the change in mechanical properties on heating temperature and the main features of steel structure are determined. TEM is used to study excess phase precipitation, including Nb and V carbonitrides, during heating. Unfavorable temperature ranges are determined for heating pipe steels with a ferrite-bainite structure. The results obtained may be used in industrial production and during development of new technology for thermomechanical treatment.

Keywords

heat treatment pipe steels ferrite-bainite microstructure carbonitride precipitation TEM method 

References

  1. 1.
    M. Murata, N. Doi, I. Tirada, T. Khaara, and T. Inue, “Planning and production of high-strength linear pipes of strength class K65 for the Bovanenkovo-Ukhta project,” Nauka Tekhn. Gaz. Prom., No. 1, 88–91 (2009).Google Scholar
  2. 2.
    N. Yu. Matrosov, Yu. D. Morozov, et al., “Development and industrial approval of steel production for pipes of strength class K65 (Kh80) for the Bovanenkovo–Ukhta gas pipeline,” Probl. Cher. Met. Mater., No. 3, 33–41 (2010).Google Scholar
  3. 3.
    Yu. I. Matrosov, I. V. Ganoshenko, O. A. Bagnet, and T. Yu. Ivanova, “Possibilities of increasing the yield strength of sheets of high-strength pipe steels Kh70 and Kh80,” Stal, No. 2, 74–78 (2005).Google Scholar
  4. 4.
    Yu. G. Morozov, S. Yu. Nastich, A. M. Korchagin, et al., “Structure and properties of strips for large diameter pipes made of steels of strength category Kh80–Kh100,” Metallurg, No. 3, 43–49 (2009).Google Scholar
  5. 5.
    K. W. Andrew, “Empirical formula for the calculation of some transformation temperatures,” JISI, 203, July, 721–727 (1965).Google Scholar
  6. 6.
    F. S. LePera, “Improved etching technique for determination of percent martensite in high-strength dual phase steels,” J. Metallography, No. 12, 263–268 (1979).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2011

Authors and Affiliations

  • M. Yu. Matrosov
    • 1
  • O. P. Talanov
    • 1
  • I. V. Lyasotskii
    • 1
  • D. L. Dyakonov
    • 1
  • E. I. Khlusova
    • 2
  • V. V. Orlov
    • 2
  • A. M. Korchagin
    • 3
  • D. S. Tsvetkov
    • 3
  • S. D. Popova
    • 3
  1. 1.Bardin Central Research Institute of Ferrous MetallurgyMoscowRussia
  2. 2.Prometey Central Research Institute of Structural MaterialsSt. PetersburgRussia
  3. 3.Severstal Cherepovets Metallurgical CombineVologda RegionRussia

Personalised recommendations