Coated cemented carbides and processes for the production of same.

摘要

A coated cemented carbide alloy which has good toughness as well as wear resistance and which is used for cutting tools and wear resistant tools is provided comprising a cemented carbide substrate consisting of a hard phase of at least one carbide, nitride or carbonitride of a Group IVa, Va or VIa metal of the Periodic Table and a binder phase consisting of at least one iron group metal, and a monolayer or multilayer, provided thereon, consisting of at least one carbide, nitride, oxide or boride of Group IVa, Va or VIa metals of the Periodic Table, solid solutions thereof or aluminum oxide, in which a binder phase-enriched layer is provided in a space between 0.01 mm and 2 mm below the surface of the substrate and there are pores of A-type and/or B-type inside the binder phase-enriched layer.