Mainly on the Microstructures of Commercially Sold WC-Co Cemented Carbide Used for High Pressure Aparatus

Abstract

Microstructures, hardness, cobalt and carbon contents of WC-Co alloys prepared commercially in different manufacturers for anvil and cylinder of high pressure apparatus were, in detail, examined. It was known that the above properties of anvil or cylinder were, at first sight, almost in the same way, in spite of the difference of manufacturers. On the other hand, it was noted that very coarse WC particles were usually observed in the microstructures of both parts of anvil and cylinder. It was also noted that the distribution of HV, cobalt and carbon contents throughout the parts were never uniform, with the fact that those properties differed distinctly between the surface layer and inside of the parts, in no relation to the sorts of manufacturers.