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Preparation method of diamond coating and diamond coating blade

A technology of diamond coating and transition layer, which is applied in metal material coating process, coating, superimposed layer plating, etc., can solve the problems of poor catalytic effect of diamond, waste of hard alloy substrate, short acid corrosion time, etc. Reach the effects of reducing growth impact, increasing nucleation amount, and improving binding force

Active Publication Date: 2019-02-22
FUNIK ULTRAHARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the acid-base two-step method is the most widely used, but after the two-step pretreatment, although the bonding phase on the surface of the substrate is removed, the cobalt phase deep inside the substrate will continue to diffuse to the deposition interface during the subsequent diamond deposition process. , and has a poor catalytic effect on diamond formation
In addition, the acid is highly corrosive, and the solution preparation is dangerous, and the acid corrosion time is short, and it is usually easy to handle improperly and cause the cemented carbide substrate to be wasted.

Method used

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  • Preparation method of diamond coating and diamond coating blade

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Experimental program
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Effect test

Embodiment 1

[0022] The present embodiment provides a kind of preparation method of diamond coating, comprises the following steps:

[0023] Alkali washing puts the cemented carbide substrate in a mixed solution of potassium ferricyanide and potassium hydroxide for alkali cleaning, then washes with water and dries to obtain a clean cemented carbide substrate; wherein, the mass fraction of the potassium ferricyanide is 5%, the massfraction of described potassium hydroxide is 10%;

[0024] Preparation of copper transition layer Putting the clean cemented carbide substrate into a copper sulfate solution with a mass fraction of 10% was processed for 10 min, then washed with water and dried to obtain a cemented carbide substrate containing a copper transition layer;

[0025] Ultrasonic cleaning: Add diamond particles with an average particle size of 50 nm into methanol solution, and mix them uniformly by ultrasonic to prepare a nano-diamond organic suspension with a mass fraction of 0.2%; place...

Embodiment 2

[0029] The difference between this embodiment and embodiment 1 is:

[0030] In the step of alkali washing, the massfraction of the potassium ferricyanide is 10%, and the massfraction of the potassium hydroxide is 20%;

[0031] In the step of preparing the copper transition layer, the clean cemented carbide substrate is put into a copper sulfate solution with a mass fraction of 20% for 5 min;

[0032] In the step of ultrasonic cleaning, diamond particles with an average particle diameter of 80 nm are added to the ethanol solution, and ultrasonically mixed uniformly to obtain a nano-diamond organic suspension with a mass fraction of 0.5%; the copper-containing transition The cemented carbide substrate of the first layer is placed in the nano-diamond organic suspension and ultrasonically cleaned for 30 min;

[0033] In the step of depositing diamond, under the condition that the pressure is 1 kPa and the temperature is 1500° C., the hot wire chemical vapor deposition method is a...

Embodiment 3

[0036] The difference between this embodiment and embodiment 1 is:

[0037] In the step of alkali washing, the massfraction of the potassium ferricyanide is 15%, and the massfraction of the potassium hydroxide is 25%;

[0038] In the step of preparing the copper transition layer, the clean cemented carbide substrate is put into a copper sulfate solution with a mass fraction of 15% for 30 min;

[0039] In the step of ultrasonic cleaning, the diamond particles with an average particle diameter of 20 nm are added to the ethanol solution, and ultrasonically mixed uniformly to obtain a nano-diamond organic suspension with a mass fraction of 0.2%; the copper-containing The cemented carbide substrate of the transition layer is placed in the nano-diamond organic suspension and ultrasonically cleaned for 20 min;

[0040] In the step of depositing diamond, under the condition that the pressure is 3 kPa and the temperature is 1250° C., the hot wire chemical vapor deposition method is ad...

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Abstract

The invention provides a preparation method of a diamond coating layer. The preparation method comprises the following steps: firstly, a hard alloy matrix is washed by alkali, and is cleaned by water for drying to obtain a clean hard alloy matrix; the clean hard alloy matrix is put in copper sulfate solution with a mass fraction of 10-20% for treating by 5-30 min to prepare a hard alloy matrix containing a copper transition layer; the hard alloy matrix containing the copper transition layer is put in nanometer diamond organic suspension for ultrasonic cleaning to obtain hard alloy pretreated body; and the diamond coating layer is formed on the surface of the hard alloy pretreated body by a chemical vapor deposition method. The invention further provides a diamond coating layer blade; the diamond coating layer blade comprises the copper transition layer and the diamond coating layer prepared by the method; and the diamond coating layer prepared by the method is higher in bonding force with the hard alloy matrix, so that the diamond coating layer blade is higher in precision and longer in service life.

Description

technical field [0001] The invention relates to the field of superhard materials, in particular to a method for preparing a diamond coating and a diamond coating blade. Background technique [0002] Diamond coating has excellent properties such as hardness close to natural diamond, high elastic modulus, extremely high thermal conductivity and chemical stability, so it has broad application prospects in the field of processing aluminum alloys, ceramics, carbon fibers, graphite and other non-ferrous materials . The combination of cemented carbide and diamond coating makes the tool not only show the high hardness and wear resistance of diamond, but also show the good impact resistance and toughness of cemented carbide itself, coupled with low manufacturing cost, it is used in the field of ultra-precision machining , is an ideal tool material. [0003] However, due to the catalysis of cobalt, the binder phase metal in cemented carbide, and the difference in physical properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/27C23C16/02C23C28/00
CPCC23C16/0227C23C16/0281C23C16/271C23C28/322C23C28/347
Inventor 赵亚晴
Owner FUNIK ULTRAHARD MATERIAL