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Improvement of a Set of Steel Properties Due to Forming Phase Precipitates During Hot Deformation Combined with Quenching

  • A. V. KoldaevEmail author
  • F. V. Arifulov
  • A. I. Zaitsev
Article

The effect of nano-sized carbide and carbonitride precipitate formation during hot deformation combined with quenching on steel strength is studied. Results obtained for a complexly alloyed laboratory melted model steel indicate that with metal cooling rates 22–25°C/sec, adequate for obtaining a martensitic structure, there is formation of nano-sized carbide and carbonitride precipitates providing additional steel hardening. This makes it possible to achieve good ultimate strength (2130 MPa), yield strength (1850 MPa) and relative elongation (not less than 11%) indices. According to the results of studying three specially selected different melts of industrial steels it has been established that the formation of nanosize carbonitrides and other types of precipitates stimulates the implementation of additional hardening mechanisms, resulting in a significant increase (up to 250–300 MPa or more) in strength properties.

Keywords

steel hot deformation combined with quenching austenite structure fineness martensite phase precipitates strength service properties 

Notes

Work was carried out due to a grant of the Russian scientific fund (project No. 18-17-00298) in the FGUP I. P. Bardin TsNIIchermet.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • A. V. Koldaev
    • 1
    Email author
  • F. V. Arifulov
    • 1
  • A. I. Zaitsev
    • 1
  1. 1.GNTs RF FGUP I. P. Bardin TsNIIchermetMoscowRussia

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