Abstract
Some properties of WC-Co alloy as well as those of WC powder were studied relating to the carbonizing temperature of starting WC powder having the same grain size (2.5μm) . The WC powder carbonized at low temperature (L-WC) appeared to be pulverized more easily, compared with the powder carbonized at high temperature (H-WC). In other words, sintered alloys prepared by using L-WC showed often the micro-structure containing coarse WC grains which anomaly grew, suggesting that H-WC was more stable than L-WC. However, the H-WC seemed to be not necessarily advantageous, considering that the above result was changeable according to manufacturing history of the alloy.
