COATED CUTTING TOOL FOR MEDIUM-ROUGH TO ROUGH TURNING OF STAINLESS STEELS AND SUPERALLOYS
The present invention relates to a cutting tool insert comprising a cemented carbide body and a coating particularly useful in medium-rough to rough turning of stainless-steels and superalloys. The cemented carbide body consists of a cemented carbide with a composition of 7.0-12.0 wt-% Co, 5.0-11.0...
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| creator | OSTLUND STEFAN SUNDSTROM ERIK ZACKRISSON JENNI MARTINEZ CARLOS BUENO |
| description | The present invention relates to a cutting tool insert comprising a cemented carbide body and a coating particularly useful in medium-rough to rough turning of stainless-steels and superalloys. The cemented carbide body consists of a cemented carbide with a composition of 7.0-12.0 wt-% Co, 5.0-11.0 wt-% cubic carbide forming metals from group IVb, Vb and VIb of the periodic table, preferably Ti, Nb and Ta, and balance WC with a 10-30 mum essentially cubic carbide phase free and binder phase enriched surface zone. The coating comprises an MTCVD Ti(C7N) as the first layer adjacent the body having a thickness of from 2.5 to 7.0 μm, on top of which an α-Al2O3 layer is present, with a thickness of between 2.0 and 5.0 μm, and a total thickness of the coating of between 5.5 and 9.5 μm. The alumina layer has a (006) texture. |
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The cemented carbide body consists of a cemented carbide with a composition of 7.0-12.0 wt-% Co, 5.0-11.0 wt-% cubic carbide forming metals from group IVb, Vb and VIb of the periodic table, preferably Ti, Nb and Ta, and balance WC with a 10-30 mum essentially cubic carbide phase free and binder phase enriched surface zone. The coating comprises an MTCVD Ti(C7N) as the first layer adjacent the body having a thickness of from 2.5 to 7.0 μm, on top of which an α-Al2O3 layer is present, with a thickness of between 2.0 and 5.0 μm, and a total thickness of the coating of between 5.5 and 9.5 μm. 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| 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 |
| title | COATED CUTTING TOOL FOR MEDIUM-ROUGH TO ROUGH TURNING OF STAINLESS STEELS AND SUPERALLOYS |
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