Coating coating on blade substrate and preparation method thereof

Abstract

The invention provides an overlay coating on a blade substrate and a preparation method thereof. The overlay coating comprises at least four alternately deposited TiN layers and TiCN layers, at leastfive alternately deposited TiCNO layer and TiN layers, an AlTiCNO layer, an aluminum oxide nucleating layer and an aluminum oxide coating, wherein the thickness of each of the TiN layers and TiCN layers is 0.5-1.0 [mu]m, the thickness of each of the TiCNO layer and TiN layers is 0.5-1.0 [mu]m, the thickness of the AlTiCNO layer is 0.1-1.5 [mu]m, the thickness of the aluminum oxide nucleating layeris 0.1-0.8 [mu]m, and the thickness of the aluminum oxide coating is 3-10 [mu]m. The preparation method comprises the step of depositing the coatings successively on a hard alloy blade at corresponding temperatures, atmospheres and air pressures by means of a chemical vapor deposition method. The blade coated by the coating is higher in hardness and wear resistance, higher in wear-resistant degree and longer in service life.

Description

technical field

[0001] The invention relates to the coating field of cutting tools, in particular to a coating coating on a blade substrate and a preparation method thereof. Background technique

[0002] Coating the surface of cutting tools is one of the important ways to improve the performance of cutting tools. Coated tools have the advantages of high surface hardness, good wear resistance, stable chemical properties, heat resistance and oxidation resistance, small friction coefficient and low thermal conductivity. , When cutting, the service life of the tool without coating is increased by more than 5 to 10 times.

[0003] Aluminum oxide coating has high chemical stability and excellent thermal barrier performance, and is an ideal coating material for high-speed cutting tools. The prior art tries to refine the grains of alumina to make alumina with strong texture to improve hardness and wear resistance. For example, Chinese patent CN104085142A discloses a coating coatin...

Examples

Embodiment 1

[0046] The surface of the cemented carbide cutting blade is coated with a medium temperature layer and an alumina layer, specifically including: four sets of alternately deposited TiN layers and TiCN layers, the thickness of the TiN layer and TiCN layer are both 0.5-1.0 μm; five sets of alternately deposited layers TiCNO and TiN layers, the thickness of both TiCNO and TiN layers is 0.5-1.0 μm; a layer of AlTiCNO layer, the thickness is 0.1-1.5 μm; a layer of alumina nucleation layer, the thickness is 0.1-0.8 μm; a layer of alumina coating layer with a thickness of 3-10 μm. The detailed process for preparing the above coatings is shown in the table below.

[0047] Table 1 embodiment 1 detailed process parameter

[0048]

[0049]

[0050] figure 1 , 3 , 5 and 7 are electron microscope results of the coating of this embodiment. Depend on figure 1 It can be seen that the aluminum oxide coating is composed of columnar grains; the aspect ratio of the columnar grains is 1 ...

Embodiment 2

[0052] The surface of the cemented carbide cutting blade is coated with a medium temperature layer and an alumina layer, specifically including: five sets of alternately deposited TiN layers and TiCN layers, the thickness of the TiN layer and TiCN layer are both 0.5-1.0 μm; five sets of alternately deposited layers TiCNO and TiN layers, the thickness of both TiCNO and TiN layers is 0.5-1.0 μm; a layer of AlTiCNO layer, the thickness is 0.1-1.5 μm; a layer of alumina nucleation layer, the thickness is 0.1-0.8 μm; a layer of alumina coating layer with a thickness of 3-10 μm. The detailed process for preparing the above coatings is shown in the table below.

[0053] Table 1 embodiment 2 detailed process parameters

[0054]

Embodiment 3

[0056] The surface of the cemented carbide cutting blade is coated with a medium temperature layer and an alumina layer, specifically including: four sets of alternately deposited TiN layers and TiCN layers, the thickness of the TiN layer and TiCN layer are both 0.5-1.0 μm; six sets of alternately deposited layers TiCNO and TiN layers, the thickness of both TiCNO and TiN layers is 0.5-1.0 μm; a layer of AlTiCNO layer, the thickness is 0.1-1.5 μm; a layer of alumina nucleation layer, the thickness is 0.1-0.8 μm; a layer of alumina coating layer with a thickness of 3-10 μm. The detailed process for preparing the above coatings is shown in the table below.

[0057] Table 1 embodiment 3 detailed process parameters

[0058]

[0059]

technical field

[0001] The invention relates to the coating field of cutting tools, in particular to a coating coating on a blade substrate and a preparation method thereof. Background technique

[0002] Coating the surface of cutting tools is one of the important ways to improve the performance of cutting tools. Coated tools have the advantages of high surface hardness, good wear resistance, stable chemical properties, heat resistance and oxidation resistance, small friction coefficient and low thermal conductivity. , When cutting, the service life of the tool without coating is increased by more than 5 to 10 times.

[0003] Aluminum oxide coating has high chemical stability and excellent thermal barrier performance, and is an ideal coating material for high-speed cutting tools. The prior art tries to refine the grains of alumina to make alumina with strong texture to improve hardness and wear resistance. For example, Chinese patent CN104085142A discloses a coating coatin...

Examples

Embodiment 1

[0046] The surface of the cemented carbide cutting blade is coated with a medium temperature layer and an alumina layer, specifically including: four sets of alternately deposited TiN layers and TiCN layers, the thickness of the TiN layer and TiCN layer are both 0.5-1.0 μm; five sets of alternately deposited layers TiCNO and TiN layers, the thickness of both TiCNO and TiN layers is 0.5-1.0 μm; a layer of AlTiCNO layer, the thickness is 0.1-1.5 μm; a layer of alumina nucleation layer, the thickness is 0.1-0.8 μm; a layer of alumina coating layer with a thickness of 3-10 μm. The detailed process for preparing the above coatings is shown in the table below.

[0047] Table 1 embodiment 1 detailed process parameter

[0048]

[0049]

[0050] figure 1 , 3 , 5 and 7 are electron microscope results of the coating of this embodiment. Depend on figure 1 It can be seen that the aluminum oxide coating is composed of columnar grains; the aspect ratio of the columnar grains is 1 ...

Embodiment 2

[0052] The surface of the cemented carbide cutting blade is coated with a medium temperature layer and an alumina layer, specifically including: five sets of alternately deposited TiN layers and TiCN layers, the thickness of the TiN layer and TiCN layer are both 0.5-1.0 μm; five sets of alternately deposited layers TiCNO and TiN layers, the thickness of both TiCNO and TiN layers is 0.5-1.0 μm; a layer of AlTiCNO layer, the thickness is 0.1-1.5 μm; a layer of alumina nucleation layer, the thickness is 0.1-0.8 μm; a layer of alumina coating layer with a thickness of 3-10 μm. The detailed process for preparing the above coatings is shown in the table below.

[0053] Table 1 embodiment 2 detailed process parameters

[0054]

Embodiment 3

[0056] The surface of the cemented carbide cutting blade is coated with a medium temperature layer and an alumina layer, specifically including: four sets of alternately deposited TiN layers and TiCN layers, the thickness of the TiN layer and TiCN layer are both 0.5-1.0 μm; six sets of alternately deposited layers TiCNO and TiN layers, the thickness of both TiCNO and TiN layers is 0.5-1.0 μm; a layer of AlTiCNO layer, the thickness is 0.1-1.5 μm; a layer of alumina nucleation layer, the thickness is 0.1-0.8 μm; a layer of alumina coating layer with a thickness of 3-10 μm. The detailed process for preparing the above coatings is shown in the table below.

[0057] Table 1 embodiment 3 detailed process parameters

[0058]

[0059]

Images