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Vacuum carbidization of transition metals of groups IV and V

  • Chemicothermal Treatment
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    We investigated vacuum carbidization of transition metals of group IV (titanium, zirconium, hafnium) and group V (vanadium, niobium, tantalum). We found that the optimal processing temperatures for a high-quality case tightly adherent to the base metal are as follows: titanium, 1300°C; zirconium, 1400°C; hafnium, 1100°C; vanadium, 1300°C; niobium, 1400°C; and tantalum, 1600°C.

  2. 2.

    It was found that the case usually consists of two phases on metals of group V, which agrees with the respective phase diagrams. The thickness of each phase is proportional to the width of the homogenous region on the phase diagram, which indicates approximately equal diffusion rates of carbon in these phases.

  3. 3.

    The characteristic acicular structure of the case on vanadium is due to the crystallographic direction of the diffusion of carbon in V2C.

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Literature cited

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Authors
  1. G. L. Zhunkovskii
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Additional information

Carbidization means diffusion saturation with carbon.

Institute of Problems of Material Science of the Academy of Sciences of the Ukrainian SSR. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 2–5, October, 1968.

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Zhunkovskii, G.L. Vacuum carbidization of transition metals of groups IV and V. Met Sci Heat Treat 10, 761–763 (1968). https://doi.org/10.1007/BF00654128

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  • DOI: https://doi.org/10.1007/BF00654128

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