Metal Science and Heat Treatment

, Volume 42, Issue 2, pp 70–73 | Cite as

Analysis of the causes of the appearance of brittle cracks in large stamped preforms from steel 30KhGSNMA-VD

  • V. I. Murav’ev
Strength
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Conclusions

  1. 1.

    Intermediate annealing after stamping large preforms of steel 30KhGSNMA-VD can be accompanied by temper brittleness of kind II, which causes the formation of brittle cracks in subsequent grinding and quenching.

     
  2. 2.

    In order to prevent the formation of brittle cracks in stamped preforms, they should be subjected to sandblasting after grinding and decelerated heating for quenching in the final treatment.

     

Keywords

Residual Stress Impact Toughness Potassium Ferrocyanide Brittle Crack Temper Brittleness 

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References

  1. 1.
    Ya. M. Potak,Brittle Fracture of Steel and Steel Parts [in Russian], Mashinostroenie, Moscow (1965).Google Scholar
  2. 2.
    M. N. Georgev,Ductility of Low-Carbon Steels [in Rusian], Metallurgiya, Moscow (1973).Google Scholar
  3. 3.
    F. F. Azhogin,Corrosion Cracking and Protection of High-Strength Steels [in Russian], Metallurgiya, Moscow (1974).Google Scholar

Copyright information

© Kluwer Academic/Plenum Publishers 2000

Authors and Affiliations

  • V. I. Murav’ev
    • 1
  1. 1.Komsomolsk-on-Amur Aircraft Production Association (KNAAPA)Komsomolsk-on-AmurRussia

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