Influence of the nano-WC content and Sintering Temperature on the Phase Composition of Hard Alloys in the System TiC–WC–VC–NiCr

S. Pukas; L. Zinko; N. German; R. Gladyshevskii; I. V. Koval; L. Bodrova; H. Kramar; S. Marynenko

doi:10.15330/pcss.21.3.496-502

Authors

S. Pukas Ivan Franko National University of Lviv
L. Zinko Ivan Franko National University of Lviv
N. German Ivan Franko National University of Lviv
R. Gladyshevskii Ivan Franko National University of Lviv
I. V. Koval Ternopil Ivan Puluj National Technical University
L. Bodrova Ternopil Ivan Puluj National Technical University
H. Kramar Ternopil Ivan Puluj National Technical University
S. Marynenko Ternopil Ivan Puluj National Technical University

DOI:

https://doi.org/10.15330/pcss.21.3.496-502

Keywords:

hard alloy, nano WC, fine-sized WC, X-ray powder diffraction, phase composition

Abstract

The effect of the WC content and the sintering temperature, as the main technological factor, on the phase composition of TiC–xWC–5VC–18NiCr alloys was investigated by X-ray phase analysis. It was established that the main phases in the investigated alloys were the NaCl-type quaternary (Ti,V,W)C phase and a solid solution of Cr in Ni. Depending on the size of the WC particles used for the preparation, the metal binder could be described by the formula Ni_0.75Cr_0.25 (for nano WC) or Ni_0.5Cr_0.5 (for fine-sized WC). In alloys prepared with fine-sized WC, elementary Cr and traces of the Cr₃C₂ and Cr₂₃C₆ were also found. With increasing content of nano-sized WC and sintering temperature the solubility of W in (Ti,V)C increased. No W₂C phase was detected under the conditions of the investigation.

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