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Preparation method of nano-diamond coating and nano-diamond blade

A nano-diamond and diamond technology, which is applied in the direction of metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of insufficient precision of diamond-coated tools, short service life, weakened bonding force, etc., and achieve favorable Effects of deposition, increased nucleation amount, and improved binding force

Active Publication Date: 2016-04-20
FUNIK ULTRAHARD MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the presence of a cobalt binder phase in the cemented carbide substrate, cobalt tends to promote the growth of the graphite phase, which in turn leads to weakening of the binding force between the precipitated diamond coating and the cemented carbide substrate, thereby making the existing diamond-coated cutting tool less effective. The accuracy is not good enough and the service life is relatively short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present embodiment provides a kind of preparation method of nano-diamond coating, specifically comprises the following steps:

[0026] Precipitation of the transition layer: first, the tungsten-cobalt alloy substrate is cleaned and dried with ultra-pure water to obtain a clean tungsten-cobalt alloy substrate; Tungsten-cobalt alloy substrate with molybdenum coating.

[0027] Ultrasonic cleaning: first suspend ultra-nano diamond particles with a particle size of 4-50nm in a solvent, and prepare a particle number concentration of 6×10 18 The thick ultra-nano-diamond suspension of / g; Then get 2mL described thick ultra-nano-diamond suspension and drop into the ultrapure water of 50mL, stir and dilute so as to make described nano-diamond suspension; Then described surface band The molybdenum-coated tungsten-cobalt alloy substrate is placed in the supernano-diamond suspension, ultrasonically cleaned for 20 minutes, and then dried at 200° C. for 20 minutes to obtain a tun...

Embodiment 2

[0036] Embodiment 2 of the present invention provides a nano-diamond blade, which includes a tungsten-cobalt alloy substrate and a metal molybdenum transition layer and nano-diamond deposited on the tungsten-cobalt alloy substrate in sequence using the preparation method of the nano-diamond coating provided in Embodiment 1. coating.

[0037] Comparative test 3

[0038] Comparative Test 3 provides a nano-diamond blade, which includes a tungsten-cobalt alloy substrate and a nano-diamond coating deposited on the tungsten-cobalt alloy substrate by the method of Comparative Test 2 in Example 1.

[0039] Experimental verification: the international standard ISO is used to conduct cutting tests on the inserts with diamond composite coatings prepared by the above method, in which the turning object is ZAlSi 12 For alloy materials, the turning speed is 200m / min, the feed rate is 24mm / min, and the turning depth is 0.5mm; the wear bandwidth VB value on the flank face at 1 / 2 cutting dept...

Embodiment 3

[0041] Embodiment 3 of the present invention provides a kind of preparation method of nano-diamond coating, and the difference between this preparation method and the preparation method provided in above-mentioned embodiment 1 is:

[0042] In the step of precipitating the transition layer, the precipitated transition layer is a titanium layer;

[0043] In the ultrasonic cleaning step, the ultrasonic cleaning time is 40min, and is dried at a temperature of 70°C for 30min; the surface roughness of the finally obtained nano-diamond coating is 70nm, and the average of the nano-diamond particles in the nano-diamond coating is The particle size is 90nm.

[0044] In the step of depositing the nano-diamond coating, the specific process is as follows: under the condition of a pressure of 13kPa and a temperature of 850°C, microwave plasma chemical vapor deposition is used to 2 、CH 4 For the reaction gas source, react on the tungsten-cobalt alloy precipitation pretreatment body for 8 h...

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Abstract

The invention provides a preparation method of a nano-diamond coating. The preparation method comprises the following concrete steps of depositing a transition layer on the surface of a hard alloy matrix by using a physical vapor deposition method; then, carrying out ultrasonic cleaning by using an ultranano-diamond suspension liquid to obtain a hard alloy precipitate pretreatment body; and depositing a nano-diamond coating on the surface of the hard alloy precipitate pretreatment body by using a chemical vapor deposition method. The invention also provides a nano-diamond blade comprising a blade matrix, the transition layer and the nano-diamond coating, wherein the transition layer and the nano-diamond coating are sequentially deposited on the surface of the blade matrix by using the methods. The nano-diamond coating and the hard alloy matrix prepared by using the methods have a relatively high binding force so that the nano-diamond blade has relatively high machining precision and relatively long service life.

Description

technical field [0001] The invention belongs to the technical field of superhard materials, and in particular relates to a preparation method of a nano-diamond coating and a nano-diamond blade. Background technique [0002] As there are more and more types of superhard materials, there are more and more cutting tools that can be used in the processing and cutting industry. Due to the extremely high hardness and thermal conductivity of diamond tools, as well as the extremely low coefficient of friction and thermal expansion, diamond tools have an absolute advantage in the processing material industry. It is difficult to meet the status quo. The ideal finishing tool requires the tool surface to be extremely smooth, so that it can improve the machining accuracy in the process of processing materials. [0003] Nano-diamond tools not only maintain the advantages of hardness and thermal conductivity of bulk diamond, but also have some characteristics of nano-materials such as hig...

Claims

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Application Information

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IPC IPC(8): C23C16/02C23C16/27
CPCC23C16/0272C23C16/0281C23C16/27C23C16/271C23C16/274
Inventor 许立李丙文
Owner FUNIK ULTRAHARD MATERIAL
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