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Phase equilibria in W-Fe-Co-Ni system alloys. I. Alloys containing 10% (Fe + Co + Ni) at 1400–1200°C

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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

The isostructural intermediate μ-phases of Fe7W6 and Co7W6 in the W-Fe-Co system form a continuous series of solid solutions and transformation of the L + αμ peritectic equilibrium into, the similar L + α⇆μ (Co7W6), occurring in a narrow temperature range (1640–1630°C) is observed. In the W-Fe-Co-Ni system in the 1470–1460°C range transition of the L + α⇆ μ(Fe7W6)+γ peritectic equilibrium into the similar. L + α⇆μ (Co7W6+γ is also observed.

Upon completion of crystallization and at temperatures of 1400–1200°C alloys of the primary section with 10% (Fe + Co + Ni) have a two-(α + γ or +γ) or three-phase (α+μ +γ) structure. In alloys rich in iron at temperatures below 1215°C FeW may form instead of μ(Fe7W6) phase.

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Authors and Affiliations

  1. Moscow Institute for Steel and Alloys, USSR

    A. M. Zakharov, V. G. Parshikov, L. S. Vodop'yanova & V. A. Novozhonova

Authors
  1. A. M. Zakharov
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  2. V. G. Parshikov
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  3. L. S. Vodop'yanova
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  4. V. A. Novozhonova
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Translated from Poroshkovaya Metallurgiya, No. 4(280), pp. 60–64, April, 1986.

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Zakharov, A.M., Parshikov, V.G., Vodop'yanova, L.S. et al. Phase equilibria in W-Fe-Co-Ni system alloys. I. Alloys containing 10% (Fe + Co + Ni) at 1400–1200°C. Powder Metall Met Ceram 25, 313–316 (1986). https://doi.org/10.1007/BF00794413

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  • DOI: https://doi.org/10.1007/BF00794413

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