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Study Regarding the Production of WC/Co Cutting Tools Produced Through PIM Technology

  • : Cora, V S1
  • : 1Technical University of Cluj Napoca
  • : PDF Download
  • : 2012

Abstract

Cemented carbide cutting tools are usually produced through conventional powder metallurgy method of die pressing. For the production of complex shaped cutting tools with small dimensions, PIM technology is a promising alternative to conventional methods. This paper presents our results regarding the possibility of producing cutting tools through powder injection molding and liquid phase sintering of a WC/Co powder. The material used in this experiment is a mix of FTC (fused tungsten carbide) powder with 6wt% cobalt. The binder has the following composition: 25wt% low density polyethylene, 5wt% stearic acid, 70wt% paraffin. After injection, the parts were debinded in two ways immersion in solvent at room temperature and solvent vapor debinding, followed by drying for 1 hour at 75 �C. The debinded green samples were sintered at 1400 ?C for 30 minutes in a vacuum oven. The samples had a contraction of 24%, relative density of 99% and 1690 HV10/15 hardness.
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