CEMENTED CARBIDE WITH BINDER PHASE ENRICHED SURFACE ZONE AND ENHANCED EDGE TOUGHNESS BEHAVIOUR

摘要

According to the present invention coated cemented carbide inserts are available containing WC and cubic phases of carbide and/or carbonitride in a binder phase based on cobalt and/or nickel with a binder phase enriched surface zone. The binder phase content along a line essentially bisecting the edge increases towards the edge and cubic phase is present. As a result the edge toughness of the cutting inserts is improved.