Soviet Powder Metallurgy and Metal Ceramics

, Volume 8, Issue 2, pp 161–164 | Cite as

Butt welding of hard-alloy cermet parts

  • M. M. Babich
Exchange of Experience and Information
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Conclusions

  1. 1.

    Our method of butt welding makes it possible to produce hard-alloy parts of any length from plates, rings, cylinders, or billets with other shapes, obtained by means of the usual sintering process.

     
  2. 2.

    Butt welding of hard-alloy parts with a cobalt percentage in excess of 6% can be performed successfully without using the “solder.”

     
  3. 3.

    In order to secure a strong bond between the surfaces in welding low-cobalt alloys, it is necessary to place between them thin “solder” plates consisting of a mixture of tungsten carbide and cobalt where the percentage of the latter exceeds by 5–10% the cobalt percentage in the parts to be welded, or a cobalt layer with a thickness of 1–3μm, acting as “solder,” is deposited by electrolysis on the surfaces to be welded.

     
  4. 4.

    With a higher cobalt content in welding and the subsequent annealing, the interlayers vanish as a result of migration of the liquid phase.

     

Keywords

Migration Carbide Welding Cobalt Tungsten 

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Literature cited

  1. 1.
    N. F. Kazakov, Vacuum Welding of Metals [in Russian], NTO (Scientific and Technical Division) Mashprom, Kiev (1958).Google Scholar
  2. 2.
    M. M. Babich, Author's certificate No. 140581, Ofitsial'nyi byull. “Izobreteniya, Promyshlennye Obraztsy,” Tovarnye Znaki, No. 16 (1961).Google Scholar

Copyright information

© Consultants Bureau 1969

Authors and Affiliations

  • M. M. Babich
    • 1
  1. 1.Institute of Superhard MaterialsUSSR

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