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Cutting tool with coating

A cutting tool and coating technology, applied in the field of coated cutting tools, can solve problems such as weak bonding force

Pending Publication Date: 2022-01-21
GANZHOU ACHTECK TOOL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the object of the present invention is to solve the problem of weak bonding between the AlTiN layer and the AlTiSiN layer in a coated cutting tool

Method used

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Experimental program
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Effect test

Embodiment 1

[0027] A multi-layer wear-resistant coating 2 with a total thickness of 20 μm was coated on the cemented carbide indexable insert SNGX1206ANN-MM4 as the substrate by CVD technology.

[0028] The cemented carbide composition is 12% Co, 1.5% cubic carbide and the balance WC.

[0029] The multilayer wear-resistant coating 2 sequentially includes from the inside to the outside: at least one layer of titanium compound layer 21 and at least one layer of periodic coating 22, and the periodic coating 22 is formed by alternate deposition of AlTiN layer 221 and AlTiSiN layer 222, repeating the cycle for 12. The coating surface roughness of the multi-layer wear-resistant coating 2 is Ra≤0.2 μm.

[0030] The titanium compound layer 21 is prepared by CVD technology, and the titanium compound layer 21 constitutes the first hard layer adjacent to the cemented carbide substrate 1 . The titanium compound layer 21 is made of one or more of TiN, TiC, and TiCN, preferably TiN, and has a thickne...

Embodiment 2

[0036] A multi-layer wear-resistant coating 2 with a total thickness of 0.5 μm was coated on the cemented carbide indexable insert SNGX1206ANN-MM4 by CVD technology.

[0037] The cemented carbide composition is 12.5% ​​Co, 1.2% cubic carbide and the balance WC.

[0038] The repetition period of the periodic coating 22 is 8, and the coating surface roughness of the multilayer wear-resistant coating 2 is Ra≤0.1.5 μm.

[0039] The titanium compound layer 21 is prepared by CVD technology, and the titanium compound layer 21 is made of TiN with a thickness of 0.05 μm.

[0040] The composition of the AlTiN layer 221 is Ti 0.96 al 0.04 N, the thickness is 0.2μm, and the nanohardness is greater than 35GPa. AlTiN coating was prepared by CVD technology, at 700°C, 4mbar pressure, using 98.0at% hydrogen, 0.10at% TiCl 4 , 0.30at% AlCl 4 , 0.7at% NH 3 , the rest of the inert gas constitutes the gas mixture.

[0041] AlTiSiN layer 222 is Si x N y The amorphous-wrapped high-alumina fc...

Embodiment 3

[0045] A multi-layer wear-resistant coating 2 with a total thickness of 15 μm was coated on the cemented carbide indexable insert SNGX1206ANN-MM4 by CVD technology.

[0046] The cemented carbide composition is 11.5% Co, 1.7% cubic carbide and the balance WC.

[0047] The repetition period of the periodic coating 22 is 10, and the coating surface roughness of the multilayer wear-resistant coating 2 is Ra≤0.18 μm.

[0048] The titanium compound layer 21 is prepared by CVD technology, and the titanium compound layer 21 is made of TiN with a thickness of 0.1 μm.

[0049] The composition of the AlTiN layer 221 is Ti 0.83 al 0.17 N, the thickness is 0.2μm, and the nanohardness is greater than 35GPa. The AlTiN layer 221 has a face-centered cubic (FCC) crystal structure and crystal growth assumes a (111) direction. AlTiN coating was prepared by CVD technology, at 800°C, 4mbar pressure, using 96.0at% hydrogen, 0.13at% TiCl 4 , 0.35at% AlCl 4 , 0.8at% NH 3 , the rest of the inert...

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Abstract

The invention discloses a cutting tool with a coating. The cutting tool comprises a substrate and a plurality of wear-resistant coatings which are deposited by adopting a chemical vapor deposition method and have the total thickness of 0.5 microns-20 microns. The plurality wear-resistant coatings sequentially comprise at least one titanium compound layer and at least one periodic coating from inside to outside, the periodic coating is formed by alternately depositing AlTiN layers and AlTiSiN layers, and a transition layer is arranged between each AlTiN layer and the adjacent AlTiSiN layer. The transition layers are composed of AlTiN or AlTiSiN, and the Si content of the transition layers is gradually increased in a gradient mode from the AlTiN layers to the AlTiSiN layers. The cutting tool aims to solve the problem of weak binding force between the AlTiN layers and the AlTiSiN layers in the cutting tool with the coating.

Description

technical field [0001] The invention belongs to the field of processing tools, in particular to a coated cutting tool. Background technique [0002] The requirements of high production efficiency and environmental protection in the field of modern machining, as well as the complexity and diversification of processed materials, put forward higher requirements for the wear resistance of tool coatings. In order to meet the demand of high-speed dry cutting, the current tool materials, especially tool coating materials, must further improve the wear resistance and toughness of the coating materials. In order to deal with difficult-to-machine materials, it is also necessary to improve the ability of the tool material to resist adhesive wear and the bonding force of the coating. [0003] AlTiN coating can significantly improve the high temperature wear resistance of the tool, and is generally prepared by PVD (physical vapor deposition) method. However, the Al content of AlTiN coa...

Claims

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Application Information

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IPC IPC(8): C23C16/34C23C16/36C23C28/00
CPCC23C16/34C23C16/36C23C28/40
Inventor 谭卓鹏朱骥飞邱联昌成伟殷磊
Owner GANZHOU ACHTECK TOOL TECH
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