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Water-based graphite-based high-temperature bonding solid lubricant and preparation method and application thereof

A solid lubricant, graphite-based technology, applied in the field of tribology, can solve the problems of narrow temperature range of glass lubricants, compounding, material structure performance decline, etc., to improve uniform dispersion and economic performance, improve lubrication effect, Easy to coat effect

Active Publication Date: 2020-04-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the presence of oxygen, graphite will begin to oxidize at temperatures below 400°C to form carbon dioxide (CO 2 ), resulting in a significant decrease in the structural properties of the material
In general, graphite-based bonded solid lubricants are used at temperatures below 500°C or at room temperature. Above 500°C, soft metal coating is used for lubrication, and above 650°C, glass lubricants are used. However, the use temperature range of glass lubricants with different components is narrow, so it is necessary to compound different glass lubricants according to the temperature of specific working conditions

Method used

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  • Water-based graphite-based high-temperature bonding solid lubricant and preparation method and application thereof
  • Water-based graphite-based high-temperature bonding solid lubricant and preparation method and application thereof
  • Water-based graphite-based high-temperature bonding solid lubricant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Preparation of lubricant:

[0053] Raw material components: 10wt% graphite; 8wt% silicon dioxide; 8wt% phosphate binder; 1wt% cetyltrimethylammonium chloride; 0.1wt% polydimethylsiloxane 0.5 wt% of 2,6-di-tert-butyl-p-cresol; 72.4 wt% of deionized water.

[0054] 2. Preparation of lubricating coating:

[0055] (1) Mix the above-mentioned graphite and silicon dioxide in the weight ratio, and grind so as to obtain the main lubricating agent. (2) Mix and stir the components of binder, dispersant, defoamer and antioxidant meeting the above mass ratio with deionized water evenly, so as to obtain a mixed aqueous solution. (3) Add the main lubricating agent into the mixed aqueous solution, and stir to obtain a water-based graphite-based high-temperature bonded solid lubricant.

[0056] Use a spray gun to spray the above-mentioned water-based graphite-based high-temperature bonded solid lubricant on the surface of the metal workpiece under compressed air (no oil) or compr...

Embodiment 2

[0070] Prepare water-based graphite-based high-temperature bonded solid lubricant according to the method substantially the same as Example 1, and the gained lubricant is made into lubricating coating and carries out performance test, difference is,

[0071] (1) lubricant raw material components: 10wt% graphite; 10wt% silicon dioxide; 8wt% phosphate binder; 1wt% cetyltrimethylammonium chloride; Methylsiloxane; 0.5 wt% of 2,6-di-tert-butyl-p-cresol; 70.4 wt% of deionized water.

[0072] (2) The temperature in the performance test is 800°C.

[0073] The test results show that within the test period, the friction coefficient of the coating is stable at ~0.25 after running and melting, and the lubricating coating can fully meet the lubrication requirements of the extrusion process. No matter inside or outside the wear scar area, the color of the coating is still black, and there is an enamel luster in the wear scar area, indicating that graphite still exists after the high temper...

Embodiment 3

[0075] Prepare water-based graphite-based high-temperature bonded solid lubricant according to the method substantially the same as Example 1, and the gained lubricant is made into lubricating coating and carries out performance test, difference is,

[0076] (1) lubricant raw material components: 10wt% graphite; 12wt% silicon dioxide; 8wt% phosphate binder; 1wt% cetyltrimethylammonium chloride; Methylsiloxane; 0.5 wt% of 2,6-di-tert-butyl-p-cresol; 68.4 wt% of deionized water.

[0077] (2) The temperature in the performance test is 900°C.

[0078] The test results show that within the test period, the friction coefficient of the coating is stable at ~0.25 after running and melting, and the lubricating coating can fully meet the lubrication requirements of the extrusion process. No matter inside or outside the wear scar area, the color of the coating is still black, and there is an enamel luster in the wear scar area, indicating that graphite still exists after the high temper...

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Abstract

The invention discloses a water-based graphite-based high-temperature bonding solid lubricant and a preparation method and application thereof. The water-based graphite-based high-temperature bondingsolid lubricant is prepared from the following components in percentage by weight: 8 to 25% of a lubricating main agent, 1 to 5% of a dispersing agent, 4 to 16% of a bonding agent and 60 to 80% of water, wherein the lubricating main agent comprises graphite and silicon dioxide; the dispersing agent comprises at least one selected from the group consisting of a silane coupling agent, hexadecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium bromide, lauryl sodium sulfate and sodium dodecyl sulfate; and the bonding agent comprises at least one selected from the group consisting of water-based polyamideimide, inorganic phosphate and water glass. The water-based graphite-based high-temperature bonding solid lubricant has the characteristics of excellent antifriction and antiwear properties, wide temperature application range, normal-temperature curing, simple post-treatment of coating, environmental friendliness, avoidance of high-temperature oxidation of workpieces and the like.

Description

technical field [0001] The invention relates to the field of tribology, in particular, the invention relates to a water-based graphite-based high-temperature bonding solid lubricant and a preparation method and application thereof. Background technique [0002] Bonded solid lubricating coating (also known as dry lubricating film), usually defined as a solid material with inherent lubricating properties, is to disperse a solid lubricant in an organic or inorganic binder system, and then use a coating process similar to paint A new type of lubrication technology that forms a film on the surface of friction parts to reduce friction and wear has been developed with the development of modern high-tech industries such as aerospace. [0003] Bonded solid lubricating coatings are not only economical and easy to operate, but also have excellent anti-wear and anti-friction properties, low friction coefficient and wide temperature range, and are usually used to solve some special tribo...

Claims

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Application Information

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IPC IPC(8): C10M173/02C10M177/00C10N30/10C10N30/06C10N30/08C10N50/02
CPCC10M173/02C10M177/00C10M2201/041C10M2201/085C10M2201/105C10M2207/026C10M2215/04C10M2229/041
Inventor 淮文娟张晨辉戴媛静雒建斌
Owner TSINGHUA UNIV
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