OUTIL DE COUPE EN ALLIAGE DUR REVETU DE CARBONITRURE DE TITANE

• Main Authors: ROMAGNOLO G, PASTOR H
• Format: Patent
• Language: French
• Published: 17.10.1978
• Subjects: BORING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMBINED OPERATIONS; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; OTHER WORKING OF METAL; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TURNING; UNIVERSAL MACHINE TOOLS

The cutting tool consists of a substrate made of a hard alloy containing from 40 to 95 % of WC, 3 to 50 % of carbides of group IV and V metals, and from 2 to 15 % of an Fe, Ni and/or Co binder, and of a titanium carbonitride coating Ti CxNy (0.8 < x + y </= 1). In a diagram with co-ordinates p (percentage of metal carbides other than WC) and x, the representative point M(p,x) is situated inside the quadrilateral ABCD such that for A p = 3 x = 0.9 B p = 10 x = 0.9 C p = 50 x = 0.3 D p = 23 x = 0.3 The cutting tools have a markedly improved resistance to wear, both flank wear and in character.