Влияние легирования сплавов системы Co–Fe карбидами TaC, NbC и WC на их взаимодействие с графитом при нагреве под высоким давлением

Abstract

On heating up to 1600 K at a pressure of 4,8–5,0 ГПа the structures of the contact melting zones formed during the interaction of the Co-Fe system alloys doped with TaC, NbC and WC carbides and graphite contain (irrespective of the carbide content of alloys) phases, characteristic both of the stable (solid solution - graphite), and metastable (solid solution - Ме₃С-type carbides) states of the alloys. The distributions of phases and sublayers in the contact melting zones correspond to a horizontal section of the phase diagram of the Fe-C system. The sublayer, which forms on the border with graphite and contains no carbides, corresponds to the peritectic region of the diagram at high pressure.