Coated cutting tool

A cutting tool and coating technology, applied in the direction of manufacturing tools, workpieces, drilling tool accessories, etc., can solve problems such as inability to extend tool life

Active Publication Date: 2020-11-17
TUNGALOY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the problem that the life of the tool cannot be extended

Method used

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  • Coated cutting tool
  • Coated cutting tool
  • Coated cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0119] Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these Examples.

[0120] [Substrate]

[0121] The following substrates were used by cleaning the surface of the substrate after rounding the ridge line portion of the tip with a SiC brush.

[0122]

[0123] Shape: CNMG120412

[0124] Material: Carbide (88.9WC-7.9Co-1.5TiN-1.4NbC-0.3Cr 3 C 2 (The above is mass %))

[0125]

[0126] Shape: CNMG120412

[0127] Material: Carbide (89.7WC-7.1Co-1.5TiN-1.5NbC-0.2Cr 3 C 2 (The above is mass %))

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Abstract

The invention provides a coated cutting tool which has excellent wear resistance and defect resistance, so that the service life of the tool can be prolonged. The coated cutting tool comprises a substrate and a coating layer formed on a surface of the substrate, wherein the coating layer includes a predetermined lower layer, an intermediate layer comprising alpha-Al2O3, and an upper layer comprising TiCN; the lower layer, intermediate layer, and upper layer have predetermined average thicknesses; a condition represented by formula (1) [RSA>=40 (1)] is satisfied; the interface of the intermediate layer on the upper layer side has a kurtosis roughness (Sku) of more than 3.0; the interface of the intermediate layer on the upper layer side has a skewness roughness (Ssk) of less than 0; and a condition represented by formula (2) [RSB>=40 (2)] is satisfied.

Description

technical field [0001] The present invention relates to a coated cutting tool. Background technique [0002] In the past, coated cutting tools made by vapor-depositing a coating layer on the surface of a substrate made of cemented carbide with a total film thickness of 3 to 20 μm by chemical vapor deposition were used for cutting steel, cast iron, etc. Technology is widely known. As the above-mentioned coating layer, it is known that there are, for example, carbides, nitrides, carbonitrides, carbon oxides and carbonitrides selected from Ti, and aluminum oxide (Al 2 o 3 ) in the group consisting of a single layer or a coating layer composed of two or more layers. [0003] Patent Document 1 describes a surface-coated cutting tool characterized in that, on the surface of a tool base made of tungsten carbide-based cemented carbide, a lower layer made of a titanium compound layer and a layer made of aluminum oxide are vapor-deposited. (Al 2 o 3 layer) as a hard coating laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/00B23B27/14B23B51/00B23C5/16
CPCB23B27/00B23B27/14B23B51/00B23C5/16B23B2228/10B23B2228/105B23C2228/10C23C16/403C23C16/0218C23C16/56C23C30/005C23C28/044B23B27/148C23C16/36
Inventor 高桥欣也福岛直幸
Owner TUNGALOY CORP
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