Coated insert and method of making same
AssigneeSandvik Intellectual Property AB
InventorsMikael Lindholm, Markus Rodmar, Anders Jonsson
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Abstract
A cutting tool insert particularly for turning of steel comprising a body and a coating with a first (innermost) layer system of at least two layers of TiCxNyOz with x+y+z≦1 with a total thickness of from about 0.7 to about 4.5 μm, a second layer system to a large extent consisting of Al2O3 and an outermost layer system comprising one or several layers in sequence of TiCxNy (x+y≦1) with individual thicknesses of greater than about 0.15 to about 0.8 μm and a layer with Al2O3 with a thickness greater than about 0.1 to about 0.4 μm with a total thickness of the outermost layer system thinner than about 2.5 μm and a total thickness of the coating in the range of from about 2.0 to about 12.0 μm.
Claims49
A cutting tool including a body and a coating, said coating comprising:
- a first (innermost) layer system of at least two layers of TiCxNyOz with x+y+z≦1 with a total thickness of from about 0.7 to about 4.5 μm,
- a second layer system consisting of a single Al2O3-layer,
- an outermost layer system comprising one or several layers in sequence of TiCxNy (x+y≦1), with individual thicknesses of greater than about 0.15 to about 0.8 μm, adding up to a total thickness of greater than about 0.6 to about 2.0 μm and a layer with Al2O3 with a thickness greater than about 0.1 to about 0.4 μm adding up to total thickness of the outermost layer system thinner than about 2.5 μm,
- with the total thickness of the coating in the range from about 2.0 to about 12.0 μm.
A cutting tool comprising a body and a coating, said coating including:
- a first (innermost) layer system of at least two layers of TiCxNyOz with x+y+z≦1 with a total thickness of from about 0.7 to about 4.5 μm;
- a second layer system comprising a multilayer system including an Al2O3-layer;
- a further layer system comprising one or several layers of TiCxNy (x+y≦1), with individual thicknesses of greater than about 0.15 to about 0.8 μm, adding up to a total thickness of greater than about 0.6 to about 2.0 μm;
- and
- an outermost layer of Al2O3 with a thickness greater than about 0.1 to about 0.4 μm,
- wherein a total thickness of the coating in the range from about 2.0 to about 12.0 μm.
A method of making a cutting tool insert of a body and a coating wherein said body is produced by mixing of powders, ball milling, spray-drying, pressing method, followed by sintering and pre-treating according to conventional methods and then coated with
- a first (innermost) layer system of at least two layers of TiCxNyOz with x+y+z≦1 with a total thickness of from about 0.7 to about 4.5 μm, using for the first layer, known chemical vapor deposition (CVD) methods and for the second layer using known CVD techniques,
- a second layer system comprising mainly Al2O3,
- an outermost, less than about 2.5 μm, thick layer system comprising one or several layers in sequence of TiCxNy (x+y≦1), with individual thicknesses of less than about 0.15 to about 0.8 μm and a total thickness of greater than about 0.6 to about 2.0 μm, followed by an Al2O3 layer with a thickness greater than 0.1 to about 0.4 μm, the total thickness of the coating being in the range of from about 2 to about 12.0 μm.
Dependencies are inferred from the claim text.