Coated cermet cutting tool and use thereof
A technology for cutting tools and cermets, used in tools for lathes, metal processing equipment, metal material coating processes, etc.
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Embodiment 1
[0035]Cermet and cemented carbide substrates A-D having chemical compositions according to Table 1 were produced using conventional methods from powders which were ground, pressed and sintered, with or without subsequent grinding to prepare blade shapes, ISO standard CNMA120416 T02020, CNMA120416-KR and CNMA160616 T02520 and CNMA160616KR. In addition, the blades are also subject to mechanical edge honing.
[0036] After this, the blades are cleaned and coated using methods known in the art. The coating composition and thickness are shown in Table 2. Deposition of two or four layers including Ti(C,N) and α-Al 2 o 3 layer. Ti(C,N) is deposited in order to obtain a columnar grain structure of the layer. This is done using the known MT-CVD method (MT-medium temperature, CVD-chemical vapor deposition), where, among other gases, acetonitrile, CH 3 CN, as nitrogen and carbon sources. The aluminum oxide layer is coated with a TiN layer.
[0037] At the beginning of the coating...
Embodiment 2
[0050] An insert of model number CNMA120416 T02020, which has a rake land of 200 μm wide and at an angle of 20° relative to the rake face, has an edge honing of 30 μm (measured on an uncoated insert), and is basically Materials A, B, C, D have coatings 1, 2, 3, 4, 5, designated as A / 1, A / 2, A / 3, A / 4, A5, B5, C / 2, C / 3 , D5, the insert was subjected to a cutting test, an external spinning operation comprising a package of 4 discs of cast-skinned ductile iron (NCI). The discs have a diameter of 250mm and they are machined to a diameter of 120mm by repeated passes. The flank wear width of the cutting edge was measured after machining 32 disc assemblies. As a reference, a commercially available Si with the same geometry was also used 3 N 4 Ceramic blade.
[0051] Machining Data
[0052] Workpiece: SS0727, Ductile Iron (NCI).
[0053] Operation type: external rotation operation.
[0054] Cutting speed: 600m / min.
[0055] Cutting depth: 3mm.
[0056] Feed: 0.35mm / rev.
[00...
Embodiment 3
[0061] Example 3 was accomplished using inserts A / 3, A / 4, C / 3, D5 produced in the same way as in Example 2. The insert geometry was CNMA120416-KR, with a flat rake face, with an edge surface wear of 40 μm (measured on an uncoated insert). In gray cast iron, the cutting tests including external rotation operations involved an assembly of 4 discs with a diameter of 250mm, which were machined to a diameter of 120mm by an iterative process. The flank wear width of the cutting edge was measured after machining 32 disc assemblies. As a reference, a commercially available Si with the same geometry was also used 3 N 4 Ceramic blade.
[0062] cutting data
[0063] Workpiece: SS0125, gray cast iron (GCI).
[0064] Operation type: external rotation operation.
[0065] Cutting speed: 850m / min.
[0066] Cutting depth: 3mm.
[0067] Feed: 0.35mm / rev.
[0068] Coolant: Dry operation.
[0069] result:
[0070]
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Abstract
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