Abstract
The purpose of this study is to describe, whether the life time of WC-Co cemented carbide tools for hot glasses is poor or not, as expected, even in the application in inert atmospheres. The interfacial reaction between WC-Co cemented carbide and two sorts of glasses, that is, generally known flint and crown glasses, was studied at 1023-1223 K in Ar of 0.1 MPa. It was found that the flint glass reacted sharply with binder and WC phases in cemented carbide, mostly with binder phase in the early stage of reaction; on the other hand, the crown glass never reacted. In case of the former, pore formation and precipitation of Pb phase, etc. were observed inside the glass near the interface, owing to the reaction as above. It was suggested that the life time of cemented carbide tools for flint glass can be improved, when the alloy having low carbon, low cobalt and fine carbide grains was used.
