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Coated Cutting Tools

A cutting tool and coating technology, applied in the direction of manufacturing tools, workpieces, drilling tool accessories, etc., can solve the problem that the tool life cannot be extended

Active Publication Date: 2022-07-29
TUNGALOY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the life of the tool cannot be extended due to this

Method used

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  • Coated Cutting Tools
  • Coated Cutting Tools
  • Coated Cutting Tools

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0098] Hereinafter, the present invention will be described in more detail by way of Examples, but the present invention is not limited to these Examples.

[0099] As a substrate, prepare a CNMG120412 shape with 88.9WC-7.9Co-1.5Ti N-1.4NbC-0.3Cr 3 C 2 (The above is mass %) and the cutting insert made of cemented carbide and having the shape of CN MG120412 and having 89.7WC-7.1Co-1.5TiN-1.5NbC-0.2Cr 3 C 2 A cemented carbide cutting insert having a composition (the above are mass %). The surface of the base material was cleaned after rounding honing of the edge portion of the base material with a SiC brush.

[0100] [Inventive products 1 to 17 and comparative products 1 to 9]

[0101] After cleaning the surface of the substrate, a coating layer is formed by chemical vapor deposition. First, the substrate was loaded into an external thermal chemical vapor deposition apparatus, and under the conditions of the raw material composition, temperature and pressure shown in Table 1...

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Abstract

The present invention provides a coated cutting tool which can prolong tool life by having excellent wear resistance and chip resistance. The covered cutting tool includes a base material and a covering layer formed on the surface of the base material, the covering layer includes a lower layer, an intermediate layer and an upper layer in this order from the base material side, and the lower layer includes one or two or more specific Ti layers Compound layer, the intermediate layer contains α-type Al 2 O 3 layer, the upper layer contains a TiCNO layer, the average thickness of the coating layer is 5.0 μm or more and 30.0 μm or less, in the range from the interface on the upper layer side of the intermediate layer toward the base material side to 1 μm and with the lower layer side of the base material. In the first cross-section where the interface is parallel, the orientation difference A satisfies a specific condition, is within a range of 1 μm from the interface on the intermediate layer side of the upper layer to the interface on the opposite side, and is parallel to the interface on the lower layer side of the substrate. In the second cross section, the orientation difference B satisfies a specific condition.

Description

technical field [0001] The present invention relates to a coated cutting tool. Background technique [0002] Conventionally, it is widely known that a coated cutting tool obtained by vapor-depositing a coating layer on the surface of a base material made of cemented carbide with a total film thickness of 3 to 20 μm by chemical vapor deposition is used for cutting steel, cast iron, or the like. . As the above-mentioned coating layer, for example, there are known ones made of carbides, nitrides, carbonitrides, oxycarbides, oxycarbonitrides, and aluminum oxide (Al) selected from the group consisting of Ti. 2 O 3 ) in the group consisting of a single layer or a coating layer formed of two or more layers. [0003] Patent Document 1 describes a surface-coated cutting tool characterized in that a lower layer formed of a titanium compound layer and an aluminum oxide layer ( Al 2 O 3 layer) as a hard coating layer, and in this surface-coated cutting tool, an aluminum oxide laye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/30C23C16/40B23B27/14B23B51/00B23C5/16
CPCC23C16/30C23C16/403B23B27/14B23B51/00B23C5/16B23B2228/04B23B2228/10B23B2228/36C23C16/36C23C16/34C23C28/044C23C16/38C23C30/005B23B27/148C23C16/308B23B2228/105C23C16/32
Inventor 高桥欣也福岛直幸
Owner TUNGALOY CORP