Process parameter optimization of pulsed electric current sintering of recycled WC-8Co powder

Mehmet Erkin Cura, Juha Lagerbom, Riina Ritasalo, Jesse Syrén, Juho Lotta, Outi Söderberg, Tapio Ritvonen, Erja Turunen, Simo-Pekka Hannula

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Abstract

The WC-8Co powder, crushed and milled from recycled hard metals, was compacted with the pulsed electric current sintering method. The smallest particles were of the size about 0.4 ìm and agglomerates 1-7 ìm. Effect of the sintering temperature and heating rate were studied. Hard metal was sintered to a density of 98.3% at 1613 K within 3.5 min under 16 MPa pressure. Density and hardness were highest for the slowest heating regime, 98.1% and HV1 1981 kg/mm2, respectively. Heating speed 100 K/min was used for fabrication of fully densed samples, sintered under pressure of 100 MPa, at 1593 K in 3 min.
Original languageEnglish
Pages (from-to)255-265
JournalEstonian Journal of Engineering
Volume15
Issue number4
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed
Event18th International Baltic Conference on Engineering Materials and Tribology, BALTMATTRIB 2009 - Tallinn, Estonia
Duration: 22 Oct 200923 Oct 2009

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Keywords

  • pulsed electric current sintering
  • WC-Co
  • microstructure
  • density
  • hardness

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