Patent ID: 6723391
Filing Date: 2004-04-20
Classification: C23C,Y10T

Abstract:
A method of manufacturing tools comprising: a first cutting tool for working a metal and being a tool selected from a first group of tools consisting of drills, roughing milling cutters, peripheral milling cutters, tools for hobbing machines, turning tools; and a second cutting tool for working a metal and being a tool selected from a second group of tools consisting of front-end milling cutters and ball-end milling cutters; the method further comprising:providing on a first region of a tool body of said first and of said second cutting tools, which first region contains at least one cutting edge, a first hard material coating by means of a plasma vacuum coating process; providing on a second region of the tool body of said first and of said second cutting tools, which second region is adjacent said first region, a second hard material coating by means of said plasma vacuum coating process; selecting as hard material for said first and for said second hard material coatings of said first and of said second cutting tools, a material selected from the group consisting of: carbide, oxide, oxicarbide, nitride, nitrocarbide, oxinitride and nitro oxicarbide of at least two of the metal elements Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Al; and selecting said first hard material coating for said first cutting tool to have a content of said at least two metal elements which is at most 2 at % different from a content of said at least two metal elements in said second hard material coating, and selecting said first hard material coating for said second cutting tool to have a content of said at least two metal elements to be different from the content of said at least two metal elements of said second hard material coating by more than 2 at %.