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Conventional 125 vs. electric pulse consolidation of tungsten carbide -€“ cobalt alloy: comparative analysis

  • : Evgeny Grigoryev1, Alexander Ilyuschenko2, Sergey Poberezhniy2, Oleg Kuznechik2
  • : 1NRNU MEPhI, 2Powder Metallurgy Institute
  • : PDF Download
  • : 2014

Abstract

Modes of pressing, sintering and electric pulse treatment of hard alloy powder material from tungsten carbide with cobalt binder with power frequency currents have been studied. The results of metallography have shown that the established regimes of electropulse treatments resulted in a change in the structural-phase state of the sintered powder material based on tungsten carbide. In this case the change of structural-phase state of this material manifested in reducing the content of carbon and fragile η-phase therein and in reducing porosity. The result of this structural-phase change was the increase in strength of the sintered powder material based on tungsten carbide. For comparison, we produced tungsten carbide – cobalt alloy by the method high voltage electric discharge consolidation of WC-Co powder. This hard alloy also has a fine grain structure and a high strength.
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