Method for preparing coating on cutting blade

A technology for cutting blades and coatings, applied in coatings, metal material coating processes, gaseous chemical plating, etc., can solve problems such as coating delamination and loss of surface finish

Active Publication Date: 2014-03-26
XIAMEN GOLDEN EGRET SPECIAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Intense peening impacts reduce tensile stresses in CVD coatings, but often at the expense of loss of surface finish due to formation of small grooves along cooling cracks, or even delamination of the coating

Method used

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  • Method for preparing coating on cutting blade
  • Method for preparing coating on cutting blade

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0030] 1) Select the base of the cutting blade, which can be made of cemented carbide;

[0031] 2) Coating a TiN layer on the cutting blade substrate; the method of coating the TiN layer adopts a conventional CVD method, and the process gas of the method is TiCl 4 、H 2 and N 2 , by mass percent as TiCl 4 1.5%, N 2 38%, the balance is H 2 , the process conditions of the conventional CVD method are: pressure 100 mbar, temperature 940° C., time 60 min; the thickness of the TiN layer is 0.6 μm.

[0032] 3) Coating TiC x N y layer, where x≥0, y≥0, x+y=1; the coated TiC x N y The method of the layer adopts the MTCVD method, and the process gas of the method is TiCl 4 、H 2 , N 2 and CH 3 CN, TiCl by mass percentage 4 1.5%, CH 3 CN0.5%, N 2 5%, the balance is H 2 , the process conditions of the MTCVD method are: pressure 150mbar, temperature 900°C, time 300min; the TiC x N y The thickness of the layer is 10 μm.

[0033] 4) Deposition M 1 m 2 C x N y o z Transitio...

preparation Embodiment 2

[0038] 1) Select the base of the cutting blade, which can be made of cemented carbide;

[0039] 2) Coating a TiN layer on the cutting blade substrate; the method of coating the TiN layer adopts a conventional CVD method, and the process gas of the method is TiCl 4 、H 2 and N 2 , by mass percent as TiCl 4 1.0%, N 2 26%, the remainder is H 2 , the process conditions of the conventional CVD method are: pressure 60mbar, temperature 850°C, time 45min; the thickness of the TiN layer is 0.3μm.

[0040] 3) Coating TiC x N y layer, where x≥0, y≥0, x+y=1; the coated TiC x N y The method of the layer adopts the MTCVD method, and the process gas of the method is TiCl 4 、H 2 , N 2 and CH 3 CN, TiCl by mass percentage 4 1.0%, CH 3 CN0.2%, N 2 2%, the balance is H 2 , the process conditions of the MTCVD method are: pressure 100mbar, temperature 850°C, time 150min; the TiC x N y The thickness of the layer is 6 μm.

[0041] 4) Deposition M 1 m 2 C x N y o z Transition l...

preparation Embodiment 3

[0046] 1) Select the base of the cutting blade, which can be made of cemented carbide;

[0047] 2) Coating a TiN layer on the cutting blade substrate; the method of coating the TiN layer adopts a conventional CVD method, and the process gas of the method is TiCl 4 、H 2 and N 2 , by mass percent as TiCl 4 2.0%, N 2 38%, the balance is H 2 , the process conditions of the conventional CVD method are: pressure 150mbar, temperature 1000°C, time 70min; the thickness of the TiN layer is 0.9μm.

[0048] 3) Coating TiC x N y layer, where x≥0, y≥0, x+y=1; the coated TiC x N y The method of the layer adopts the MTCVD method, and the process gas of the method is TiCl 4 、H 2 , N 2 and CH3 CN, TiCl by mass percentage 4 3.0%, CH 3 CN1.0%, N 2 7%, the balance is H 2 , the process conditions of the MTCVD method are: pressure 200mbar, temperature 1000°C, time 350min; the TiC x N y The thickness of the layer was 14 μm.

[0049] 4) Deposition M 1 m 2 C x N y o z Transition ...

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Abstract

The invention discloses a method for preparing a coating on a cutting blade, and relates to a cutting blade. The method comprises the following steps: (1) selecting a cutting blade substrate; (2) coating a TiN layer on the cutting blade substrate; (3) coating a TiCxNy layer, wherein x is more than or equal to 0, y is more than or equal to 0, and (x+y)=1; (4) depositing an M1M2CxNyOz transition layer, wherein x is more than or equal 0, y is more than or equal to 0, z is more than or equal to 0, (x+y+z)=1, M1 is one of titanium, aluminum, zirconium, hafnium, boron, silicon and the like, and M2 is one of titanium, aluminum, zirconium, hafnium, boron, silicon and the like; (5) depositing an alpha-Al2O3 layer; (6) depositing a ZrN layer; (7) depositing a TiN layer on the top; (8) removing a covering layer outside the front blade surface of the blade. The prepared coating is a coating having decorating and indicating functions for the cutting blade, and can be produced relatively easily at lower cost by adopting a CVD (Chemical Vapor Deposition) method.

Description

technical field [0001] The present invention relates to a cutting insert and in particular to a method for producing a coating on a cutting insert. Background technique [0002] Inserts are usually coated with wear-resistant coatings, and there are two main coating techniques: Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD). PVD coating not only improves wear resistance, but also improves toughness. Compared with PVD coatings, CVD coatings show higher wear resistance, but poorer toughness. Therefore, CVD-coated inserts are most often used in operations with high demands on wear resistance, while PVD-coated inserts are most often used in operations with high demands on toughness. The coating is intended to improve the cutting performance of the tool for a given application and to reduce tool wear. The coating can serve as a special protection against abrasion, but also has a decorative and indicating function. [0003] Coatings for cutting tools are kn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/30
Inventor 卢志红陈亚奋陈艺聪张守全
Owner XIAMEN GOLDEN EGRET SPECIAL ALLOY
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