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Multilayer diamond coating, manufacturing method thereof and coating tool

A diamond coating and diamond technology, applied in metal material coating process, coating, superimposed layer plating, etc., can solve the problem of low hardness of multi-layer diamond coating, low wear resistance of tools, and short service life and other problems, to achieve good compactness, which is conducive to precision machining and long service life.

Inactive Publication Date: 2016-04-13
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a multi-layer diamond coating and its preparation method, to solve the technical problem that the hardness of the existing multi-layer diamond coating is not high
[0008] Another object of the present invention is to provide a coating tool to solve the problem that the surface is coated with the existing multi-layer diamond coating tool due to the low hardness of the existing multi-layer diamond coating, which causes the tool wear resistance is not high and the use Short-lived technical issues

Method used

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  • Multilayer diamond coating, manufacturing method thereof and coating tool
  • Multilayer diamond coating, manufacturing method thereof and coating tool
  • Multilayer diamond coating, manufacturing method thereof and coating tool

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Embodiment approach

[0023] One embodiment, the multi-layer diamond coating of the embodiment of the present invention only includes a composite diamond coating structural unit, specifically as figure 1 shown. The composite diamond coating structural unit 1 includes a microcrystalline diamond coating 11 , a nanocrystalline diamond coating 12 and an ultrafine nanocrystalline diamond coating 13 which are sequentially grown and combined. That is to say, in this embodiment, the multilayer diamond coating includes a microcrystalline diamond coating 11 , a nanocrystalline diamond coating 12 and an ultrafine nanocrystalline diamond coating 13 which are sequentially grown and bonded.

[0024] In another embodiment, the multilayer diamond coating in the embodiment of the present invention includes two composite diamond coating structural units, namely composite diamond coating structural unit 1 and composite diamond coating structural unit 2, specifically as figure 2 shown. The composite diamond coating...

Embodiment 1

[0062] The embodiment of the present invention provides a WC-6% Co cutting tool with a multi-layer diamond coating on the surface. Its preparation method is as follows:

[0063] S11.WC-6% Co tool surface pretreatment:

[0064] (a) Put the WC-Co tool in an acetone solution for ultrasonic cleaning for 10 minutes, and dry it in a constant temperature drying oven at 60°C for 10 minutes;

[0065] (b) Put the cleaned carbide tool into K 3 (Fe(CN) 6 +KOH+H 2 O (wt%=1:1:10) alkali mixed solution was ultrasonicated for 15min, and distilled water was taken out for cleaning, and then washed with H 2 SO 4 +H 2 o 2 (vol%=1:10) Soak for 15s, take out distilled water to wash, dry at constant temperature at 60°C, and dry for 10min;

[0066] (c) Put the pretreated cutter into a diamond suspension solution with a particle size of 1-5 μm and a diamond suspension particle proportion of 10% of the total mass of the solution for ultrasonication for 20 minutes, take out the alcohol, clean it...

Embodiment 2

[0074] An embodiment of the present invention provides a TiC-Co tool with a multi-layer diamond coating on its surface. Its preparation method is as follows:

[0075] S21. TiC-Co tool surface pretreatment:

[0076] (a) Put the TiC-Co tool in an acetone solution for ultrasonic cleaning for 10 minutes, and dry it in a constant temperature drying oven at 80°C for 5 minutes;

[0077] (b) Put the cleaned carbide tool into K 3 (Fe(CN) 6 +KOH+H 2 O (wt%=1:1:10) alkali mixed solution was ultrasonicated for 10min, and distilled water was taken out for cleaning, and then washed with H 2 SO 4 +H 2 o 2 (vol%=1:10) Soak for 10s, take out distilled water to wash, dry at constant temperature at 80°C, and dry for 5min;

[0078] (c) Put the pretreated cutter into a diamond suspension solution with a particle size of 1-5 μm and a diamond suspension particle proportion of 15% of the total mass of the solution for ultrasonication for 20 minutes, take out the alcohol, clean it, and dry it....

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Abstract

The invention discloses a multilayer diamond coating, a manufacturing method thereof and a coating tool. The multilayer diamond coating comprises at least one composite diamond coating structure unit. Each composite diamond coating structure unit comprises a micrometer-grain diamond coating body, a nanocrystalline diamond coating body and a superfine nanocrystalline diamond coating body, wherein the nanocrystalline diamond coating body and the superfine nanocrystalline diamond coating body sequentially grow on the surface of the micrometer-grain diamond coating body. The multilayer diamond coating is high in hardness, abrasion resistance and tenacity and low in surface roughness, friction coefficient and coating stress. The coating tool comprises a tool body and the multilayer diamond coating combined to the surface of the tool body. Meanwhile, the coating tool is high in hardness, good in abrasion resistance and long in service life. The multilayer diamond coating is firmly combined with the tool body, precise machining is further facilitated, machining cost is reduced, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of vacuum coating, and in particular relates to a multilayer diamond coating, a preparation method thereof, and a coating tool. Background technique [0002] Diamond has the characteristics of high hardness (HV=100Gpa), good thermal conductivity, low friction, super wear resistance, and stable structure, and has broad application prospects in the fields of mechanics, heat, and electronics. At present, diamond coatings are mostly prepared by the hot wire chemical deposition (HFCVD) method, which is relatively mature in technology and low in production cost, and is suitable for industrial production. However, due to the strong covalent bond characteristics of diamond and the coating process characteristics of HFCVD, the diamond coating has the disadvantages of high coating stress and poor toughness, which reduces the performance of the diamond coating. [0003] With the deepening of research on diamond coatin...

Claims

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Application Information

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IPC IPC(8): C23C16/27C23C16/46
CPCC23C16/271C23C28/044C23C28/048
Inventor 唐永炳张静蒋春磊
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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