Cemented carbide with alternative binder
AssigneeSandvik Intellectual Property AB
InventorsSusanne Norgren, Erik Holmstrom, David Linder
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Abstract
The present disclosure relates to a cutting tool including a cemented carbide substrate having WC, gamma phase and a binder phase. The substrate is provided with a binder phase enriched surface zone, which is depleted of gamma phase, wherein no graphite and no ETA phase is present in the microstructure and wherein the binder phase is a high entropy alloy.
Claims8
A cutting tool comprising a cemented carbide substrate, wherein said substrate comprises a microstructure of WC, a gamma phase comprising (W,M)C and/or (W,M)(C,N) wherein M is one or more of Ti, Ta, Nb, Hf, Zr and V, and a binder phase, said substrate including a binder phase enriched surface zone which is depleted of gamma phase, wherein no graphite and no eta phase is present in the microstructure of said substrate and wherein the binder phase is a high entropy alloy comprising 4 or more elements selected from Co, Cr, Cu, W, Fe, Ni, Mo and Mn wherein the amount of each element is between 5 to 35 at % of the total amount of the high entropy alloy.
Dependencies are inferred from the claim text.