A SUPERHEAD ELEMENT, A TOOL COMPRISING SAME AND METHODS FOR MAKING SUCH SUPERHEAD ELEMENT

摘要

The invention relates to a superhard element (10) comprising a polycrystalline superhard structure (20) joined at an interface to a hard-metal body (30) comprising metal carbide grains bonded together by a metal binder,- the polycrystalline superhard structure comprising a superhard material; the hard-metal body comprising a surface region (32) proximate the interface and a core region (36) remote from the interface, the surface and the core regions being contiguous, the mean binder fraction in the core region being less than that in the surface region and to a method of making a hard-metal body for such an element.