| Title |
A Study on the Sintering Behavior of WC - Ni Cemented Carbide |
| Authors |
이홍열(Hong Yeol Lee); 박원구(Won 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. |