발간논문

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Vol.31, No.2, 201 ~ 208, 1993
Title
A Study on the Sintering Behavior of WC - Ni Cemented Carbide
이홍열Hong Yeol Lee, 박원구Won Koo Park
Abstract
The effect of coating SiC on WC powder surface was investigated in an effort to replace Co with Ni as the binder metal for cemented carbides based on WC-Co system. The density, microstructure and pore distribution of materials conventionally sintered at 1450℃ were examined as a function of the amount of SiC. The SiC-coating retarded coarsening of WC grains compared to conventional WC-Ni so that it resulted in a relatively uniform distribution of the grain size. Other improved characteristics of SiC-coated material include suppression of formation of the pores and θ phase (W₃Ni₃C), which are trouble some in WC-Ni system because of their deleterious effect on transverse rupture strength, and enhancement of hardness as compared to similar materials based on WC-Co and WC-Ni.
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