, 53:362 | Cite as

Changes in mechanical characteristics during the strain-aging of wire rod made of steel Sv-08G2S

  • A. M. Nesterenko
  • A. B. Sychkov
  • V. I. Sukhomlin
  • S. Yu. Zhukova

The Moldavian Metallurgical Plant has made a study of dynamic strain aging by subjecting specimens of wire rod made of steel Sv-08G2S to tension. Some of the steel had been microalloyed with boron, while another portion was made without this element. A stable reduction in strength properties was seen nearly throughout this range (the only exceptions were the increases in σu and Δσu in the boron-free wire rod for a test temperature of 350°C). There were some differences in the temperature dependences of ψ of steel Sv-08G2S made with and without boron. For the boron-bearing steel, the high values of ψ (77–80%) in the temperature range 200–450°C – the range that poses the greatest danger from the standpoint of reducing process ductility in drawing – in fact give the rod excellent ductility for deformation. Relatively low values of ψ are seen for the boron-free steel in the range 200–450°C. Wire rod made of steel Sv-08G2S (with or without boron) is characterized by a multiphase structure, and its matrix contains not only polygonal ferrite grains but also evenly distributed colonies of pearlite, bainite, and martensite. The stable decrease in strength properties at 100–150°C is connected with redistribution of the stresses between the structural components of the steel. Additional studies will be needed to explain the relatively stable level of ψ of boron-bearing steel Sv-08G2S wire rod in the range 200–450°C.

Key words

static and dynamic strain aging strain-hardening embrittlement impurity atoms dislocations mechano-thermal treatment microalloying boron temperature multiphase structure mechanical characteristics wire rod 


  1. 1.
    I. I. Novikov, Theory of the Heat Treatment of Metals [in Russian], Metallurgiya, Moscow (1978).Google Scholar
  2. 2.
    V. K. Babich, Yu. P. Gul, and I. E. Dolzhenkov, Strain-Aging of Steel [in Russian], Metallurgiya, Moscow (1972).Google Scholar
  3. 3.
    V. P. Fetisov, Strain-Aging of Steel During the Drawing of Wire [in Russian], Belgorstankinpromizdat, Minsk (1996).Google Scholar
  4. 4.
    V. V. Parusov, A. M. Nesterenko, I. V. Derevyanchenko, et al., “Structure and properties of wire rod and wire made of continuous-cast steel 70 microalloyed with boron,” Proc. Sci. Conf: Fundamental and Applied Problems of Ferrous Metallurgy, Naukova Dumka, Kiev (1998), pp. 383–388.Google Scholar
  5. 5.
    V. V. Parusov, A. B. Sychkov, A. M. Nesterenko, et al., “Mastering the production of wire rod and rod made of high-quality boron-microalloyed medium-carbon steel cast into semifinished products of small cross section,” Metall. Gornorud. Prom., No. 4, 48–51 (2000).Google Scholar
  6. 6.
    A. B. Sychkov, Development of an Integrated Technology for Producing Efficient Types of Wire Rod from a Continuous-Cast Semifinished Product of Small Cross Section with a High Content of Nonferrous-Metal Impurities and Nitrogen: Engineering Sciences Doctoral Dissertation: 05.16.01 and 05.16.02, Minsk (2005).Google Scholar
  7. 7.
    A. M. Nesterenko, A. B. Sychkov, S. Yu. Zhukov, and V. I. Sukhomlin, “Fine-scale microstructure of wire rod made of high-ductility steel Sv-08G2S,” Metallurg, No. 9, 48–51 (2008).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2009

Authors and Affiliations

  • A. M. Nesterenko
    • 1
  • A. B. Sychkov
    • 2
  • V. I. Sukhomlin
    • 3
  • S. Yu. Zhukova
    • 2
  1. 1.Nekrasov Institute of Ferrous MetallurgyNational Academy of Sciences of UkraineDnepropetrovskUkraine
  2. 2.Moldavian Metallurgical PlantRybnitsaMoldova
  3. 3.Dneprodzerzhinsk State Technical UniversityDneprodzerzhinsk, Dnepropetrovsk RegionUkraine

Personalised recommendations