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Metal Science and Heat Treatment

, Volume 28, Issue 5, pp 366–372 | Cite as

Change in structure and properties of the weld joints of Cr−Mo−V steel steam pipe in long service

  • R. E. Mazel
  • M. M. Melamed
  • V. A. Lappa
  • I. I. Talysheva
High-Temperature Strength Steels and Alloys
  • 40 Downloads

Conclusions

1.The structure, mechanical properties, high-temperature strength, and tendency toward brittle fracture of the weld joints in 12Kh1MF steel remain quite stable during service at 565\dgC for 120,000h.

Additional thermal diffusion aging at the same temperature for 80,000 h does not lead to a significant change in structure and properties. li]2.|With a service time exceeding 250,000 h displacement of the high-temperature branch of the logarithmic decrement of damping \gd into the area of operating temperatures (545\2-565\dgC) may be expected. li]3.|The results obtained may be used in determination of the life of steam pipe weld joints.

Keywords

Mechanical Property Steam Brittle Thermal Diffusion Operating Temperature 
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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Literature cited

  1. 1.
    R. E. Mazel', V. A. Lappa, and I. I. Talysheva, "The reliability of power equipment steam line weld joints," Svarochn. Proizvod., No. 2, 21–24 (1980).Google Scholar
  2. 2.
    R. E. Mazel' and V. A. Lappa, "The stability and reliability of 12Kh1MF steel steam line weld joints during 15 years of service," Élektr. Stantsii, No. 6, 35–38 (1974).Google Scholar
  3. 3.
    V. V. Osasyuk, "A new method of evaluation of the residual life of power system structural elements which have been in service," Dokl. Akad. Nauk UkrSSR, No. 6, 454–457 (1979).Google Scholar
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    B. E. Neimark (ed.), The Physical Properties of Steels and Alloys Used in Power Engineering (Handbook) [in Russian], Énergiya, Moscow (1967).Google Scholar
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    S. A. Golovin, "A study of the stability of the structural condition and properties of metals by methods of inelasticity," in: The Interaction of Crystalline Lattice Defects and the Properties of Metals [in Russian], Tula Polytechnic Inst. (1979).Google Scholar

Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • R. E. Mazel
  • M. M. Melamed
  • V. A. Lappa
  • I. I. Talysheva

There are no affiliations available

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