Metal Science and Heat Treatment

, Volume 18, Issue 9, pp 816–819 | Cite as

Vanadium carbonitride in low-carbon manganese steel

  • V. N. Nikitin
  • A. P. Gulyaev
  • N. I. Karchevskaya
  • Ya. M. Akhundov
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Conclusions

  1. 1.

    Low-carbon (0.03%) manganese steel (2% Mn) has a structure of ferrite with equilibrium grains, the boundaries of which are free of inclusions.

     
  2. 2.

    Alloying of the steel with nitrogen and vanadium leads to precipitation of V(C, N) in ferrite, the platelets with dimensions of 70–150 Å. However, precipitation of V(C, N) in cleavage planes {100} weakens the atomic bonds, inducing embrittlement of the steel.

     
  3. 3.

    Raising the manganese content to 4% in the low-carbon steel with vanadium carbonitride leads to formation of a bainitic structure. The V(C, N) particles precipitated in bainite are exceedingly small (30–70 Å) and located preferentially at dislocations and in dislocation networks. The increase of the ultimate strength due to these particles averages 20 kg/mm2.

     

Keywords

Nitrogen Precipitation Ferrite Manganese Vanadium 

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Literature cited

  1. 1.
    A. P. Gulyaev, V. N. Nikitin, and Ya. M. Akhundov, "Manganese low-carbon steels with vanadium carbonitrides," Metal. i Term. Obrabotka Metal., No. 11, 4 (1974).Google Scholar
  2. 2.
    R. Becker and J. Nutting, Iron and Steel Inst. Spec. Rep.,64, 1 (1959).Google Scholar
  3. 3.
    C. D. Beachem and R. M. N. Pellou, "Electron fractography — means of studying the micromechanism of fracture processes," in: Applied Problems of Fracture Toughness [Russian translation], Mir, Moscow (1968), p. 311.Google Scholar
  4. 4.
    I. N. Golikov, M. I. Gladshtein, and I. I. Murzin, Vanadium in Steel [in Russian], Metallurgiya, Moscow (1968), p. 107.Google Scholar
  5. 5.
    M. N. Spasskii and L. M. Utevskii, "Block structure of martensite crystal fragments in structural steels," Metal. i Term. Obrabotka Metal., No. 8, 33 (1967).Google Scholar
  6. 6.
    T. Ekobori, Physics and Mechanics of Fracture and Strength of Solids [in Russian], Metallurgiya, Moscow (1971), p. 108.Google Scholar

Copyright information

© Consultants Bureau 1976

Authors and Affiliations

  • V. N. Nikitin
  • A. P. Gulyaev
  • N. I. Karchevskaya
  • Ya. M. Akhundov

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