Effect of binder-phase modification and Cr3C2 addition on properties of WC-IOC0 cemented carbide

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For production of fine-grained and corrosion-resistant tungsten carbide (WC) based cemented carbides, addition of chromium carbide (Cr33C2) in small amounts is standard practice. No systematic study, however, has been made of the effects of large additions (maximum 6 wt % ) of Cr3C2 as a substitute for tungsten carbide. This study focuses on the effect of hard-phase substitution by C3C2 in WC-1OCo cemented carbide. An attempt is also made to modify the binder metal cobalt by partial or complete substitution of nickel. Specimens were prepared using the standard liquid-phase sintering process and were tested for sintered porosity, mechanical properties, corrosion resistance, and microstructural parameters. Results confirm the findings of earlier workers regarding grain refinement and improvement of mechanical properties upon the addition of small amounts (<2 wt%) of Cr3C2. Modification of the binder phase improves indentation fracture toughness and corrosion resistance. Addition of Cr3C2 independent of the binder type improves corrosion resistance.

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Banerjee, D., Lai, G.K. & Upadhyaya, G.S. Effect of binder-phase modification and Cr3C2 addition on properties of WC-IOC0 cemented carbide. JMEP 4, 563–572 (1995).

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  • binder-phase/hard-phase modification in hard metals
  • corrosion resistance of cemented carbides
  • hard metal
  • liquid-phase sintering
  • mechanical properties of cemented carbides
  • WC-l0Co cemented carbides