Insert for metal cutting

Abstract

A coated cutting insert for metal machining, in particular of short chipping materials, includes a tungsten carbide-based substrate with a binder phase enriched surface zone having at least one rake face and at least one clearance face intersecting to form a cutting edge. The binder phase enriched surface zone is at least partly missing on the rake face including at least a part of the surface extending from the cutting edge. As a result, an optimum combination of edge strength and wear resistance has been achieved.

1 - 19 . (canceled) 
   
   
       20 : A method of manufacturing a coated cutting insert for metal machining, the insert comprising a tungsten carbide-based substrate and a binder phase enriched surface zone including at least one rake face and at least one clearance face intersecting to form a cutting edge, the method comprising: forming the insert by a powder metallurgical technique including milling, pressing, sintering; and removing a binder phase enriched surface zone from the formed insert in a post-sintering treatment, wherein the binder phase enriched surface zone is removed from at least a portion of a surface of the at least one rake face, and wherein the portion from which the binder phase enriched surface zone is removed includes at least a part of a surface extending from the cutting edge.