, Volume 55, Issue 11–12, pp 925–934 | Cite as

Improvement of weldability and evaluation criteria for high-strength pipe steel heat-affected zone reliability

  • I. L. Permyakov
  • I. I. Frantov
  • A. N. Bortsov
  • K. Yu. Mentyukov

Criteria are formulated for evaluating weldability on the basis of methods simulating welding thermal cycles and analysis of austenite polymorphic transformation kinetics in the thermally affected zone. Results are provided for evaluating the joint heat-affected zone (HAZ) cold resistance under the influence of thermal action during welding of thick-walled pipes for considerable heat input and the tendency for cold cracks during welding with small heat input. The effect of alloying elements, i.e., nickel and chromium, and also vanadium and molybdenum in steels microalloyed with niobium on ductile-brittle failure parameters during impact testing is demonstrated. Microalloying niobium-containing steels with vanadium and molybdenum leads to HAZ metal embrittlement. Optimum cooling rates after welding are determined with which HAZ metal cold resistance at down to –30°C is provided are determined.


welding large diameter pipes alloying joint heat-affected zone cooling rate heat input weldability criterion 


  1. 1.
    P. P. Stepanov, V. N. Zinkeev, L. I. Efron, et al., “Improvement in steel weldability for thick-walled pipes of considerable diameter by optimizing chemical composition,” Metallurg, No. 11, 62–67 (2010).Google Scholar
  2. 2.
    M. Kh. Shorshorov, Steel and Titanium Alloys Welding Metallurgy [in Russian], Nauka, Moscow (1965).Google Scholar
  3. 3.
    I. I. Frantov, T. S. Kireeva, and V. I. Stolyarov, “Problems of steel weldability with polymorphic transformations,” in: Problems of Contemporary Metallurgy [in Russian], Metallurgiya, Moscow (1983), pp. 43–45.Google Scholar
  4. 4.
    I. I. Frantov and A. V. Nazarov, Dokl. Mezh. Inst. Svarki, IIW Doc. IX-1585-89.Google Scholar
  5. 5.
    I. Grivnyak, Steel Weldability [in Russian], edited by E. L. Makarov, Mashinostroenie, Moscow (1984).Google Scholar
  6. 6.
    I. I. Frantov, I. N. Permyakov, and A. N. Bortsov, “Kinetics of austenite phase transformations in the heat-affected zone and zone of thermal influence during welding of microalloyed pipe steels,” Probl. Chern. Met. Mater., No. 3, 38–39 (2011).Google Scholar
  7. 7.
    I. I. Frantov, G. N. Bogomolova, D. N. Zharkova, and V. V. Pokidyshev, “Distribution of boron between nitride phase and solid solution in low-alloy steel,” in: New Methods of Metal Testing, Metallugiya, Moscow (1978), No. 6, pp. 83–86.Google Scholar
  8. 8.
    G. V. Kurdyumov, L. M. Utevskii, and R. I. Entin, Transformations in Iron and Steel [in Russian], Nauka, Moscow (1977).Google Scholar
  9. 9.
    V. S. Kraposhin and A. D. Silchenkov, “Crystallographic mechanism of pearlitic transformation in the iron-carbon system,” Probl. Chern. Met. Mater., No. 2, 41–50 (2009).Google Scholar
  10. 10.
    I. I. Frantov, V. I. Stolyarov, A. V. Nazarov, and A. V. Terentiev, “Weakening of heat-affected zones during welding of steel for assembly-line purposes,” in: Optimization of Alloying and Heat Treatment for High Quality Steels, Metallugiya, Moscow (1978), pp. 52–56.Google Scholar
  11. 11.
    A. B. Arabei, I. I. Frantov, V. I. Stolyarov, and I. L. Permyakov, “Weldability and provision of quality for welded joints in manufacturing high-strength gas pipelines,” Nauka Tekhn. Gaz. Prom., No. 4, 4–19 (2009).Google Scholar
  12. 12.
    I. I. Frantov, A. N. Bortsov, A. B. Arabei, and V. I. Stolyarov, “Provision of welded joint properties in the manufacture of high-strength gas pipelines,” in: State and Main Directions of Welding Production Development (branch meeting materials), Gazprom Ekspo, Moscow (2011), pp. 37–47.Google Scholar
  13. 13.
    I. I. Frantov, T. S. Kireeva,V. I. Stolyarov, et al., “Effect of alloying on pipe steel properties and weldability problems,” Stal, No. 11, 68–72 (1986).Google Scholar
  14. 14.
    A. I. Trotsan, L. L. Poznyak, E. S. Ershov, et al., “Strengthening and embrittling action of small additions of refractory elements to low-carbon structural steels,” Metall Lityo Ukrainy, No. 1/2, 12–16 (2001).Google Scholar
  15. 15.
    I. I. Frantov, V. I. Stolyarov, and A. V. Nazarov, “Optimization of the composition of low-alloy weldable steels,” MiTOM, No. 11, 37–42 (1987).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2012

Authors and Affiliations

  • I. L. Permyakov
    • 1
  • I. I. Frantov
    • 2
  • A. N. Bortsov
    • 2
  • K. Yu. Mentyukov
    • 2
  1. 1.Volga Pipe PlantVolzhskiiRussia
  2. 2.Bardin Central Research Institute of Ferrous Metallurgy (TsNIIchermet)MoscowRussia

Personalised recommendations