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Moscow, Russia

Blagoveshchenskiy Y.V.,RAS Institute of Metallurgy | Isaeva N.V.,RAS Institute of Metallurgy | Melnik Y.I.,RAS Institute of Metallurgy | Samokhin A.V.,RAS Institute of Metallurgy | Falkovskiy V.A.,VNIIInstrument
Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010 | Year: 2010

The finer the desired hard alloy the finer has to be the initial WC powder [1]. A number of studies in the past decade have been devoted to investigation of hard alloys based on tungsten carbide nanopowders with grain size less than 100 nm [2-6]. Plasma-chemical technology was used to produce carbide tungsten WC nanopowders as well as vanadium, tantalum and chromium carbides VC, TaC, Cr3C2 served to form of nanostructured hard alloys. The cobalt was introduced into system by solution deposition of salt with following reduction process and grinding. To minimize grain coarsening, so-called growth inhibitors were added to WC-Co mixed. Three consolidation processing techniques were applied to obtain bulk samples from WC-Co nanopowders. The microstructures of nanopowders and bulk samples were analyzed by scanning electron microscopy (SEM) and X-ray diffractions (XRD) to recognize material modification. Source

Khvostantsev L.G.,VNIIInstrument | Borovskii G.V.,VNIIInstrument | Brazhkin V.V.,Russian Academy of Sciences | Laitsan L.A.,VNIIInstrument | Borovskii V.G.,VNIIInstrument
Nanotechnologies in Russia | Year: 2014

A method for radically improving the properties of hard alloy has been developed via introducing nanoparticles of tungsten carbide to it in order to adapt this approach for industrial applications. Unlike the previously reported method, plasma powder agglomerates of tungsten carbide nanoparticles are mixed with raw hard alloy powder by ball milling. The cutting inserts from the resulting solid alloy demonstrate significantly low wear in tests. © 2014, Pleiades Publishing, Ltd. Source

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