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Decoating method of a diamond-coated tool

A diamond coating and cutting tool technology, applied in metal material coating process, coating, gaseous chemical plating and other directions, can solve the problem of not eliminating the unevenness of the microstructure of the surface of the cemented carbide substrate, and achieve economical, Low cost and improved efficiency

Active Publication Date: 2019-03-15
FUNIK ULTRAHARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent requires the use of highly oxidizing Cl 2 and ClO 2 and corrosive HCl gas, and requires an exhaust gas treatment device, whose post-treatment cannot eliminate the unevenness of the microstructure of the surface of the cemented carbide substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The present embodiment takes the CNMG120408 coated tool as an example to illustrate the decoating method of the present invention, and the specific decoating process includes the following steps:

[0019] 1) Use a mixed solution of ethanol and acetone, the volume ratio of ethanol and acetone is 2:1, ultrasonically clean the diamond-coated tool for 20 minutes, after cleaning, use a compressed air gun to pre-dry the surface of the tool, and then transfer to Put it into an oven and dry at 80°C for 1h;

[0020] 2) Take the diamond-coated tool treated in step 1), put it into the chamber of the microwave plasma chemical vapor deposition equipment, and evacuate it to 1×10 -2 Pa, then feed nitrogen gas at 300 sccm to make the pressure in the chamber reach 6kPa, adjust the microwave frequency of the equipment to 2.45GHz, power to 3kW, raise the temperature to 300°C, feed oxygen at 200 sccm, keep warm for 10min, complete the uncoating, and get Tool base.

Embodiment 2

[0022] The present embodiment takes the CNMG120408 coated tool as an example to illustrate the decoating method of the present invention, and the specific decoating process includes the following steps:

[0023] 1) Use a mixed solution of ethanol and acetone, the volume ratio of ethanol and acetone is 2:1, ultrasonically clean the diamond-coated tool for 30 minutes, after cleaning, use a compressed air gun to pre-dry the surface, and then Transfer to an oven and dry at 80°C for 1 hour;

[0024] 2) Take the diamond-coated tool treated in step 1), put it into the chamber of the microwave plasma chemical vapor deposition equipment, and evacuate it to 1×10 -2 Pa, then feed nitrogen, adjust the flow of nitrogen to 300sccm by adjusting the ball valve, so that the pressure in the chamber reaches 7kPa, the microwave frequency of the equipment used is 2.45GHz, the rated power is 10kW, adjust the power to 4.5kW, and raise the temperature to 400°C , feed oxygen at 250 sccm, keep warm fo...

Embodiment 3

[0027] The present embodiment takes the CNMG120408 coated tool as an example to illustrate the decoating method of the present invention, and the specific decoating process includes the following steps:

[0028] 1) Use a mixed solution of ethanol and acetone, the volume ratio of ethanol and acetone is 2:1, ultrasonically clean the diamond-coated tool for 35 minutes, after cleaning, use a compressed air gun to pre-dry the surface, and then Transfer to an oven and dry at 80°C for 1 hour;

[0029] 2) Take the diamond-coated tool treated in step 1), put it into the chamber of the microwave plasma chemical vapor deposition equipment, and evacuate it to 1×10 -2 Pa, then feed nitrogen, adjust the flow of nitrogen to 300 sccm by adjusting the ball valve, so that the pressure in the chamber reaches 8 kPa, the microwave frequency of the equipment used is 916 MHz, adjust the power to 35 kW, raise the temperature to 450 ° C, and feed oxygen at 250 sccm , keep warm for 45min to get the to...

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Abstract

The invention relates to a coating removal method for a diamond coating tool and belongs to the technical field of coating tools. The coating removal method comprises the following steps that the diamond coating tool is put into a cavity of microwave plasma chemical vapor deposition equipment, vacuumizing is conducted, then nitrogen is introduced, the pressure in the cavity reaches 6-8 kPa, the set microwave frequency is 2.45 GHz, the power ranges from 3 kW to 6 kW, or CVD coating equipment with the microwave frequency of 916 MHz and the power not smaller than 35 kW is selected, the temperature is increased to 300-500 DEG C, oxygen is introduced at the mass flow of 200-300 sccm, the temperature is kept, coating removal is completed, and a tool base body is obtained. The method is simple, the cost is low, gas harmful to the human body is not used, a diamond coating can be removed effectively, damage to the base body is avoided, and the coating removal method is suitable for mass production.

Description

technical field [0001] The invention relates to a method for decoating a diamond-coated tool, and belongs to the technical field of coated tools. Background technique [0002] Diamond coating refers to the use of chemical vapor deposition (CVD) to synthesize diamond coating on a hard substrate. With the development of diamond coating technology, this technology has been applied to cutting tools, which are called diamond coatings. Coated tools, whose performance is close to that of natural diamond, are mainly used for cutting non-ferrous metals and their alloys (such as silicon aluminum alloy, copper alloy), ceramics, graphite and other materials. During processing, the cutting speed is fast and the processing efficiency is high, but Diamond-coated tools need to be replaced as soon as the coating wears off or falls off. Compared with high-speed steel, cemented carbide, ceramics and other tools, diamond-coated tools are more expensive. The processing of diamond-coated tools h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/02C23C16/27C23G5/00
CPCC23C16/0236C23C16/27C23G5/00
Inventor 许立赵亚晴
Owner FUNIK ULTRAHARD MATERIAL
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