Metal Science and Heat Treatment of Metals

, Volume 2, Issue 8, pp 443–445 | Cite as

Embrittlement of cold-drawn high carbon, high chromium steel Kh 18

  • N. P. Zhetvin
  • L. N. Podvoiskii
  • L. I. Krylova
Stainless Steels
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Conclusions

  1. 1.

    Steel Kh18 should not be heated for rolling to over 1150°C since overheating results in stable retained austenite in the as-rolled structure of the wire rod.

     
  2. 2.

    Storage of the hot-rolled steel at room or subnormal temperature of normally rolled and overheated steel is not permissible. After normal rolling, embrittlement is caused by residual stresses produced after air cooling in the overheated material, this being due to transformation of retained austenite into martensite.

     
  3. 3.

    Tempering at 720–740°C is recommended immediately after rolling to remove the stresses and to promote a partial decomposition of the retained austenite. Tempering of the hot rolled metal enables a pearlitic-troostitic structure to be obtained thereby removing the effects of overheating.

     
  4. 4.

    To secure desirable cold working properties, the following procedure is recommended: Isothermal annealing at 880°C/3 hrs, cooling to 700°C at 30°C/hr, holding for 4 hrs, furnace cooling to 650°C and then air cooling.

     
  5. 5.

    Isothermal annealing to increase the ductility of the overheated metal is also recommended.

     
  6. 6.

    In manufacturing wire of steel Kh18, the cold drawn material should not be stored for more than 8 hrs. prior to heat treatment.

     

Keywords

Austenite Martensite Residual Stress Cold Working Isothermal Annealing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. 1.
    E. Houdremont, Special Steels (Spetsial'nye Stali), I. [Russian Translation] Metallurgizdat Press, 1959.Google Scholar
  2. 2.
    L. Colombier and J. Hochman, Heat Resistant and Stainless Steels, (Nerzhaveyushchie i Zharoprochnye Stali) [Russian Translation] Metallurgizdat Press, 1958.Google Scholar
  3. 3.
    Z. K. Kos'ko,Fizika Metallov i Metalloved., v. 5, 1957, #1, 179–182.Google Scholar
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    M. E. Blanter,Zhurn. Tekhn. Fiz., v. 18, 1948, #4, 529–40.Google Scholar
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    A. P. Gulyaev, Carbide Phase in Steels, New Developments in Metal Science (Karbidnaya Faza v Stalyakh; Novoe v Metalloved.) Mashgiz Press, 1948.Google Scholar
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  8. 8.
    D. Ya. Vishnyakov and A. G. Vinitskii,Metalloved. i Obrab. Met., 1957, #4, 2–9 [Available as HB Translation No. 4137].Google Scholar

Copyright information

© Consultants Bureau 1960

Authors and Affiliations

  • N. P. Zhetvin
  • L. N. Podvoiskii
  • L. I. Krylova

There are no affiliations available

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