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A radiation-resistant solid lubricating coating and its preparation method

A solid lubricating coating and anti-radiation technology, which is applied in coating, metal material coating process, heating inorganic powder coating, etc., can solve the problems of low tungsten disulfide content and poor lubricating performance, so as to ensure lubricity, Anti-radiation performance guarantee, the effect of increasing the contact area

Active Publication Date: 2020-08-18
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of tungsten disulfide in the above two coatings is low, and the lubricating performance is relatively poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the mass ratio of 2:8, mechanically mix the copper powder with an average D50 particle size of 10 μm and the nickel-coated tungsten disulfide powder with a D50 average particle size of 5 μm and a nickel content of 80%, and place them in the cold spraying equipment. in the powder feeder. The carrier gas is helium, the pressure is 4MPa, the temperature is 600°C, the spraying distance is 30mm, and the powder feeding rate is 0.5L / min. Spray the mixed powder on the surface of the 9Cr18 stainless steel substrate with a surface roughness Ra of 3.2 μm that has been sandblasted with 100 mesh alumina sand. , a radiation-resistant solid lubricating coating is obtained on the surface of the substrate.

[0019] The thickness of the coating was tested with a Minitest 4100 coating thickness gauge: the thickness of the coating was 20 μm.

[0020] Adopt Positest AT adhesion tester to test the adhesion of the coating: the adhesion of the coating is 6MPa;

[0021] The fric...

Embodiment 2

[0024] According to the mass ratio of 5:5, mechanically mix the copper powder with an average D50 particle size of 10 μm and the nickel-coated tungsten disulfide powder with a D50 average particle size of 5 μm and a nickel content of 20%, and place them in the cold spraying equipment. in the powder feeder. The carrier gas is helium, the pressure is 4MPa, the temperature is 550°C, the spraying distance is 40mm, and the powder feeding rate is 1.5L / min. Spray the mixed powder on the surface of the 9Cr18 stainless steel substrate with a surface roughness Ra of 6.4 μm that has been sandblasted with 100 mesh alumina sand. , a radiation-resistant solid lubricating coating is obtained on the surface of the substrate.

[0025] The thickness of the coating was tested with a Minitest 4100 coating thickness gauge: the thickness of the coating was 50 μm.

[0026] Adopt Positest AT adhesion tester to test the adhesion of the coating: the adhesion of the coating is 4.5MPa;

[0027] The fr...

Embodiment 3

[0030] According to the mass ratio of 5:5, the copper powder with an average particle size of 60 μm and the nickel-coated tungsten disulfide powder with an average particle size of 30 μm and a nickel content of 20% are mechanically mixed, and placed in the powder feeding of the cold spraying equipment device. The carrier gas is helium, the pressure is 4MPa, the temperature is 550°C, the spraying distance is 40mm, and the powder feeding rate is 1.0L / min. Spray the mixed powder on the surface of the 9Cr18 stainless steel substrate with a surface roughness Ra of 6.4 μm that has been sandblasted with 100 mesh alumina sand. , a radiation-resistant solid lubricating coating is obtained on the surface of the substrate.

[0031] The thickness of the coating was tested with a Minitest 4100 coating thickness gauge: the thickness of the coating was 200 μm.

[0032] Adopt Positest AT adhesion tester to test the adhesion of the coating: the adhesion of the coating is 4.0MPa;

[0033] Th...

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Abstract

The invention relates to an anti-radiation solid lubricant coating and a preparation method thereof, and belongs to the technical field of surface treatment. On the basis that the total mass of coating raw materials is 100%, the raw materials comprise, in mass percentage, 20%-50% of copper powder and 50%-80% of nickel-coated tungsten disulfide powder. The copper powder and the nickel-coated tungsten disulfide powder are mechanically and uniformly mixed, placed in a powder feeder of cold spraying equipment, and then sprayed onto a surface of a base body which is subjected to the sandblasting treatment, so that the anti-radiation solid lubricant coating is obtained on the surface of the base body. The coating takes the metal copper as a continuous phase and a lubricating phase, takes the tungsten disulfide as a lubricating phase, and takes the metal nickel as a transition phase between the copper and the tungsten disulfide, so that the use amount of the lubricant in the coating and the bonding strength of the coating are improved. The high wear-resistance and anti-radiation lubricant coating is prepared by adopting a cold spraying method.

Description

technical field [0001] The invention relates to a radiation-resistant solid lubricating coating and a preparation method thereof, belonging to the technical field of surface treatment. Background technique [0002] Metal-based lubricating coatings such as ion-lead plating and silver-based lubricating coatings have been applied in rolling and sliding-rolling friction pairs in the space field due to their good ductility and radiation resistance. However, limited by the wear resistance of the coating, it is difficult to meet the lubrication of long-life moving mechanisms. With the proposal of my country's deep space exploration, space nuclear power and other tasks, the operating life of the active mechanism will not only be improved, but will also face a 10-year 8 rad(Si)~10 9 rad(Si) is used in high radiation environment, so solid lubricating coating with longer wear life and excellent radiation resistance is required. [0003] Invention patent CN201610006304.8 discloses a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
CPCC23C24/085
Inventor 周晖霍丽霞张凯锋冯凯张文晶胡汉军
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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