COATED CUTTING TOOL INSERT FOR METAL MACHINING THAT GENERATES HIGH TEMPERATURES

• Main Authors: JOHANSSON, Mats, FORSÉN, Rikard, ABRIKOSSOV, Igor, ODÉN, Magnus, ALLING, Björn, LIND, Hans, GHAFOOR, Naureen, TASNADI, Ferenc
• Format: Patent
• Language: English; French; German
• Published: 10.10.2018
• 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; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TURNING

A cutting tool insert for machining by chip removal includes a body of a hard alloy of cemented carbide, cermet, ceramics, polycrystalline diamond or cubic boron nitride based materials onto which a hard and wear resistant coating is deposited by physical vapour deposition (PVD). The coating includes at least one layer of a NaCl-structured (TicAlaCrbMed)(CzOyNx) where Me is one or more of the elements Zr, Hf, V, Nb, Ta, Mo, W and/or Si, 0.10<a<0.60, b+d>0.20, c>0.05, 0 d<0.25, 0.75<x<1.05, 0 y<0.25 and 0 z 0.25 with a thickness between 0.5 and 10 μm. The layer has a columnar mictrostructure with an average columnar width of <1 μm, a compressive stress level of −6 GPa< <−0.5 GPa and a nanohardness >25 GPa.