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

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)

    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

    Keywords

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

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