ESTONIAN ACADEMY
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Estonian Journal of Engineering

Process parameter optimization of pulsed electric current sintering of recycled WC-8Co powder; pp. 255–265

Full article in PDF format | doi: 10.3176/eng.2009.4.02

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

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 mm and agglomerates 1–7 mm. 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.


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