Mechanical Properties of Cemented Carbides Prepared by Hot Isostatic Pressing

Various mechanical properties of hot isostatic pressed WC-Co alloy were investigated and compared with those of conventionally sintered alloy. The results obtained are as follows: (1) Transverse rupture strength and fatigue strength at room temperature of hot isostatic pressed alloys become remarkably larger than those of conventionally sintered alloy. (2) The effect of HIP treatment on transverse rupture strength decreases gradually with the rise of temperature. As a reult of this tendency, trnasverse rupture strength of WC-10%Co alloy at high temperatures above 900°C becomes to be unaffected with HIP treatment. (3) Fracture toughness (KIC) is unaffected with HIP treatment.