Tungsten-Cobalt-Carbon System

Abstract

The phases and equilibria in the W-Co-C system have been studied by X-ray diffraetion methods, metallographie technique, and thermal analysis. In addition to the 7J phase, two double carbides, called f) and K, have been revealed. The compositions correspond to COSW.C2 and Co.-W,OC •. The reactions leading to these phases have been explained and tentative diagrams of stable and metastable equilibria proposed. The basic reaetions in sintering cobalt cemented tungsten carbides are discussed.