Metal Science and Heat Treatment

, Volume 35, Issue 5, pp 278–282 | Cite as

Resistance of weld joints of chrome—manganese—nickel steels to embrittlement at increased temperatures

  • T. S. Kuznetsova
  • T. A. Chernyshova
  • S. U. Myakisheva
Crrosion-Resistant Steels

Conclusions

  1. 1.

    Embrittlement of the weld joints of the investigated chrome—manganese—nickel steels in the 350–500°C range is caused primarily by processes occurring in the δ-ferrite, 475° brittleness or precipitation of excess phases at the interphase boundaries and within the δ-ferrite grains. The level of plasticity is determined not by the quantily of δ-ferrite in the structure but by the density and quantity of excess phase precipitates in it.

     
  2. 2.

    Aging processes occur in the weld zone at lower temperatures than in the base metal. For weld joints of the experimental steels 05Kh18G2N5T and 05Kh18G10N5M3F the maximum operating temperature for long service is 300°C and for 05Kh18G10N5M3AF steel below 300°C.

     

Keywords

Precipitation Nickel Chrome Manganese Brittleness 

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References

  1. 1.
    M. A. Khubrikh, T. A. Chernyshova, O. A. Bannykh, et al., "The influence of welding heating on the kinetics of phase and structural transformations in chrome—manganese—nickel steels," Metalloved. Term. Obrab. Met., No. 1, 49–52 (1989).Google Scholar
  2. 2.
    M. A. Khubrikh, G. A. Sal'nikov, Zh. A. Lepilina, et al., "The kinetics of phase transformations in 08Kh18G2N2T steel in heating in the weld cycle," Avtomat. Svarka, No. 4, 21–23 (1986).Google Scholar
  3. 3.
    O. A. Bannykh, V. N. Gulyaev, M. I. Zakharova, et al., "Embrittlement of ferritic—austenitic steels during aging at increased temperatures," Metalloved. Term. Obrab. Met., No. 8, 43–46 (1981).Google Scholar
  4. 4.
    I. Ya. Sokol, Duplex Steels [in Russian], Metallurgiya, Moscow (1974).Google Scholar

Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • T. S. Kuznetsova
  • T. A. Chernyshova
  • S. U. Myakisheva

There are no affiliations available

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