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US 2012/0237792 A1Published application
Coating for improved wear resistance
AssigneeKennametal Inc.
InventorsAharon Inspektor, Nicholas Waggle, JR., Michael F. Beblo, Mark J. Rowe, Zhigang Ban
Life of this patent
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Abstract
In one aspect, coated cutting tools are described herein which, in some embodiments, can demonstrate improved wear resistance in one or more cutting applications. In some embodiments, a coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating comprising an inner layer deposited by physical vapor deposition and an outer deposited by physical vapor deposition over the inner layer.
Claims36
A coated cutting tool comprising:
- a substrate;
- and
- a coating adhered to the substrate, the coating comprising:
- an inner layer deposited by physical vapor deposition comprising aluminum one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table;
- and
- an outer layer deposited by physical vapor deposition over the inner layer, the outer layer comprising aluminum and silicon and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table, wherein the amount of silicon in the outer layer decreases toward the inner layer.
3 more elements
A coated cutting tool comprising:
- a substrate;
- and
- a coating adhered to the substrate, the coating comprising:
- an inner layer deposited by physical vapor deposition comprising aluminum one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table;
- and
- an outer layer deposited by physical vapor deposition over the inner layer, the outer layer comprising a phase composed of aluminum and silicon and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table and a phase composed of aluminum and silicon and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table.
3 more elements
A coated cutting tool comprising:
- a substrate;
- and
- a coating adhered to the substrate, the coating comprising:
- an inner layer deposited by physical vapor deposition comprising aluminum one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table;
- and
- an outer layer deposited by physical vapor deposition over the inner layer, the outer layer comprising aluminum and silicon and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table, wherein the coating has residual compressive stress.
3 more elements
A method of making a coated cutting tool comprising:
- providing a substrate;
- and
- depositing an inner layer of a coating on the substrate by physical vapor deposition, the inner layer comprising aluminum and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table;
- and
- depositing an outer layer of the coating over the inner layer by physical vapor deposition, the outer layer comprising aluminum and silicon and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table, wherein the amount of silicon in the outer layer is decreased toward the inner layer.
2 more elements
A method of making a coated cutting tool comprising:
- providing a substrate;
- and
- depositing an inner layer of a coating on the substrate by physical vapor deposition, the inner layer comprising aluminum and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table;
- and
- depositing an outer layer of the coating over the inner layer by physical vapor deposition, the outer layer comprising a phase composed of aluminum and silicon and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table and a phase composed of aluminum and silicon and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table.
2 more elements
A method of increasing the cutting lifetime of a coated cutting tool comprising:
- directing one or more coating fatigue mechanisms to an interface of an inner layer and an outer layer of the coating by producing the inner layer from a composition deposited by physical vapor deposition comprising aluminum and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table;
- and
- producing the outer layer from a composition deposited by physical vapor deposition comprising aluminum and silicon and one or more metallic elements selected from the group consisting of metallic elements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA and VIA of the Periodic Table, wherein the amount of silicon in the outer layer decreases toward the outer layer.
Dependencies are inferred from the claim text.