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

A nano-diamond and diamond technology, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problem of insufficient precision, weak bonding force between nanometer or ultra-nanometer diamond coating and hard alloy substrate, short service life, etc. problems, to achieve the effect of increasing the amount of nucleation, facilitating nucleation, and increasing the binding force

Active Publication Date: 2018-01-05
FUNIK ULTRAHARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nano or ultra nano diamond coating prepared by the existing coating method has the problem that the bonding force between the nano or ultra nano diamond coating and the cemented carbide substrate is not strong, so that the precision of the existing diamond coating tool is not enough Well, the service life is relatively short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The invention provides a kind of preparation method of nano-diamond layer, comprises the following steps:

[0018] Pickling: pickling the cemented carbide substrate first, then washing with water and drying to obtain a clean cemented carbide substrate;

[0019] Ultrasonic cleaning: put the clean cemented carbide substrate in the ultra-nano-diamond suspension for 10-40 minutes of ultrasonic cleaning, and then dry at a temperature of 80°C-150°C for 10-30 minutes to obtain a pre-treated cemented carbide body , wherein, the ultra-nano-diamond suspension includes ultra-nano-diamond particles with a particle size of 4 to 100 nm;

[0020] Deposition: A nano-diamond layer is formed on the hard alloy pretreatment body by chemical vapor deposition.

[0021] The pickling step adopts the existing pickling process of the cemented carbide substrate, such as: take 10ml of concentrated sulfuric acid solution with a mass fraction of 95% to 98%, dilute it to 100ml with distilled water, ...

Embodiment 1

[0031] Embodiment 1 of the present invention provides a method for preparing a nano-diamond layer, comprising the following steps:

[0032] Pickling: Take 10ml of concentrated sulfuric acid solution with a mass fraction of 96%, dilute it to 100ml with distilled water, put the tungsten-cobalt alloy substrate into the sulfuric acid diluent for 3 minutes, then clean it with distilled water and dry it to obtain the clean tungsten-cobalt Alloy matrix;

[0033] Ultrasonic cleaning: first provide ultra-nano diamond particles with a concentration of 6×10 18 The thick ultra-nano-diamond suspension of / g, wherein the average particle size of the nano-diamond particles in the thick ultra-nano-diamond suspension is 10~16 nm, then get 2ml of the thick ultra-nano-diamond suspension and drop it into 25 ml Dilute in high-purity water and stir evenly to obtain the diluted ultra-nano diamond suspension of required concentration; The pH value of the nano-diamond suspension at room temperature is...

Embodiment 2

[0039] Embodiment 2 of the present invention provides a nano-diamond blade, which includes a tungsten-cobalt alloy substrate and a nano-diamond layer deposited on the tungsten-cobalt alloy substrate by the method provided in Embodiment 1.

[0040] Comparative test 2

[0041] Reference 2 provides a nano-diamond blade, which includes a tungsten-cobalt alloy substrate and a nano-diamond layer deposited on the tungsten-cobalt alloy substrate by the method of comparative test 1.

[0042] According to the international standard ISO for WC-6%wt.Co, the wear bandwidth VB on the flank face at 1 / 2 cutting depth is used as the bluntness standard, and the bluntness standard VB of cemented carbide tools is 0.4mm. Turning equipment: CK6136I CNC lathe, turning material: ZAlSi12, turning speed V= 200 m / min, feed rate f = 24 mm / min, turning depth, ap = 0.5 mm. Under the same wear amount VB=0.4 mm, the tool life provided by Example 2 is 450 min, while the tool life provided by Comparative Test...

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Abstract

The invention provides a preparation method of a nano-diamond layer. The preparation method comprises the following steps that a hard alloy matrix is firstly subjected to acid pickling treatment, then cleaned with water and dried, and a clean hard alloy matrix is obtained; the clean hard alloy matrix is put into ultra-nano-diamond suspension liquid to be subjected to ultrasonic cleaning for 10-40 min, and then dried for 10-30 min at the temperature of 80-150 DEG C, a hard alloy pretreatment body is obtained, and the ultra-nano-diamond suspension liquid comprises ultra-nano-diamond particles with the particle size of 4-100 nm; and the nano-diamond layer is formed on the hard alloy pretreatment body through a chemical vapor deposition method. The invention further provides a nano-diamond blade which comprises the nano-diamond layer deposited through the method. The bonding force of the nano-diamond layer prepared through the method and the hard alloy matrix is high, and therefore the nano-diamond blade is higher in precision and longer in 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 layer and a nano-diamond blade. Background technique [0002] As there are more and more types of superhard materials, and there are more and more coated tools in the processing and cutting industry. Diamond-coated tools have the highest hardness and highest thermal conductivity, as well as extremely low coefficients of friction and thermal expansion. So that it still has an absolute advantage in the processing material industry, such as processing non-ferrous metals, carbon fiber, graphite and ceramics. However, as the processing industry's requirements for machining accuracy continue to increase, it is difficult for ordinary diamond tools to meet the status quo. The ideal finishing tool requires that the surface of the tool should be extremely smooth, so that it can improve the machining accuracy in the process of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/27C23C16/02B23B27/14B82Y30/00B82Y40/00
CPCB23B27/14B23B2222/28B82Y30/00B82Y40/00C23C16/0227C23C16/27
Inventor 许立李丙文
Owner FUNIK ULTRAHARD MATERIAL