Process Parameter Optimization of Pulsed Electric Current Sintering of Recycled WC-8Co Powder

Taaskasutatava WC-8Co-pulbri elektriimpulsspaagutusprotsessi parameetrite optimeerimine

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

《Estonian Journal of Engineering》 15卷4期 (2009/12) Pp. 255-265

並列摘要

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 0.4μm and agglomerates 1-7μm. 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/mm^2, 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.

並列關鍵字

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