Metal wear self-repairing material for transmission parts and supporting parts and preparation method of metal wear self-repairing material

Abstract

The invention provides a metal wear self-repairing material for a transmission part and a supporting part. The metal wear self-repairing material comprises the following components in parts by weight: 16-27 parts of micron hydroxyl magnesium silicate, 13-15 parts of nano hydroxyl magnesium silicate, 11-14 parts of nano metal powder, 10-13 parts of nano filling powder, 14-19 parts of graphene, 2-3 parts of an antioxidant, 7-9 parts of a catalyst, 3-5 parts of a dispersing agent, 4-5 parts of a foaming agent and 720-990 parts of modified base oil. According to the invention, the basic modified oil is used as a carrier to bring the repairing material into the surface of a friction pair between bearings or gears, and when the bearings or gears are under a heavy-load or high-speed working condition, friction flash temperature of 800-1200 DEG C can be generated on the surface of the friction pair; the method comprises the following steps of: adding graphene into micron hydroxyl magnesium silicate, nano hydroxyl magnesium silicate, nano metal powder, nano filling powder and graphene to induce the micron hydroxyl magnesium silicate, nano hydroxyl magnesium silicate, nano metal powder, nano filling powder and graphene to generate an internal oxidation reaction on a worn surface, and automatically forming a superhard, supersmooth and superwear-resistant metal ceramic layer within 10mu m, so that a wear gap can be automatically compensated, and the precision is improved.

Description

Technical Field

[0001] This invention relates to the field of metal wear self-healing materials, specifically to a metal wear self-healing material for transmission components and support components, and its preparation method. Background Technology

[0002] Friction and wear are common physical phenomena and one of the main causes of energy loss in machinery and equipment. When various parts in machinery and equipment experience friction and wear, they not only consume energy but also suffer damage and may even affect the proper fit between parts. Reports indicate that 80% of equipment damage and failures are caused by friction and wear; therefore, friction and wear are one of the three failure modes of materials (wear, corrosion, and fracture).

[0003] Currently, the world mainly employs three approaches to address the wear and failure of components: anti-wear technology, friction reduction technology, and repair technology. However, these three traditional approaches to solving friction and wear are mostly independent, and their effectiveness, reliability, and versatility are limited. Therefore, countries around the world are racing to find self-healing materials and technologies for metal wear that can simultaneously possess friction reduction, wear resistance, and repair functions.

[0004] In existing technologies, metal self-healing materials consist of complex mineral powders, primarily magnesium hydroxysilicate-serpentine, along with small amounts of catalysts and additives. The repair mechanism often involves complex physicochemical reactions with iron-based metals under certain conditions to generate a metal repair layer. However, existing technologies are limited by the shape of the friction pair and the friction conditions, resulting in limited application and unstable performance. Furthermore, they cannot perform targeted repairs on locally worn areas, cannot provide on-demand repairs based on different surface irregularities, and cannot enhance the strength of the wear-resistant layer as needed. Therefore, existing technologies have limitations. Summary of the Invention

[0005] This invention is made to solve the above-mentioned problems, and aims to provide a self-healing material for metal wear in transmission components and support components, as well as a method for its preparation.

[0006] This invention provides a self-healing material for metal wear in transmission and support components, characterized by comprising the following components by weight: 16-27 parts micron-sized magnesium hydroxysilicate, 13-15 parts nano-sized magnesium hydroxysilicate, 11-14 parts nano-metal powder, 10-13 parts nano-filler powder, 14-19 parts graphene, 2-3 parts antioxidant, 7-9 parts catalyst, 3-5 parts dispersant, 4-5 parts foaming agent, and 720-990 parts modified base oil.

[0007] Among them, the average particle size of micron-sized magnesium hydroxysilicate is 1–3 μm, while the average particle size of nano-sized magnesium hydroxysilicate, nano-metal powder, nano-filler powder, and graphene is 15–60 nm.

[0008] The self-repairing metal wear material for transmission components and support components provided by the present invention can also have the following characteristics: the nano metal powder includes one or more of indium powder, lithium powder, nickel powder, titanium powder, or aluminum powder.

[0009] The self-repairing metal wear material for transmission components and support components provided by the present invention also has the following characteristics: the nanofiller powder includes one or more of magnesium oxide, aluminum oxide, iron oxide, titanium trioxide, calcium oxide, nickel oxide, strontium oxide, zinc oxide, molybdenum oxide, and phosphorus pentoxide.

[0010] The self-healing metal wear material for transmission components and support components provided by the present invention also has the following characteristics: the nanofiller powder includes Bayer red mud or sintered red mud.

[0011] The self-repairing metal wear material for transmission components and support components provided by the present invention also has the following feature: the catalyst includes water-soluble phosphate.

[0012] The self-repairing metal wear material for transmission components and support components provided by the present invention also has the following feature: the antioxidant includes unsaturated fatty acids.

[0013] The self-repairing metal wear material for transmission components and support components provided by the present invention also has the following characteristic: the dispersant is selected from one or more of water, anhydrous ethanol, acetone, ethylene glycol, or n-propanol.

[0014] The self-repairing metal wear material for transmission components and support components provided by the present invention also has the following characteristics: the modified base oil includes base oil, polydecene, dodecyl hydroxystearic acid, lithium hydroxide, and sebacic acid.

[0015] Through the above technical solution, this application uses mineral micron-sized magnesium hydroxysilicate as the main component, with a particle size of 1.0-3.0 μm; supplemented by artificially synthesized nano-sized magnesium hydroxysilicate, nano-metal powder, nano-graphene, and nano-filler powder, with a particle size of 15-60 nm. Therefore, when the above materials are introduced into the friction pair surface of the bearing or gearbox through a base modified oil as a carrier, under heavy load or high-speed conditions, the friction pair surface between the bearings or gears will generate a friction flash temperature of 800℃-1200℃, which will cause the foaming agent to decompose and release gas. The gas forms microbubbles in the modified base oil, and the microbubbles can be adsorbed on the surface of various powders and play a lubricating role for the powders. At the same time, the flash temperature will induce the micron-sized magnesium hydroxysilicate, nano-sized magnesium hydroxysilicate, nano-metal powder, nano-filler powder, and graphene to undergo an internal oxidation reaction on the wear surface, automatically forming an ultra-hard, ultra-slippery, and ultra-wear-resistant metal-ceramic layer within 10 μm, thereby automatically compensating for wear gaps and improving accuracy. The cermet layer produced by this application has a hardness 1-2 times higher than that of a metal surface, while maintaining an elastic modulus on par with high-quality alloy steel. Furthermore, after the formation of the cermet layer, the coefficient of friction μ is generally between 0.02 and 0.06, a decrease of more than 70% compared to traditional lubricating oil conditions. In addition, this application does not chemically react with lubricating oil, does not alter the oil's viscosity or performance indicators, has no toxic side effects during use, and is harmless to the environment and human body.

[0016] This invention also provides a method for preparing a self-healing metal wear material, applicable to any of the above-mentioned self-healing metal wear materials, comprising the following steps:

[0017] Step S1: Use a ball mill to pulverize magnesium hydroxysilicate raw material, metal powder raw material, filler powder raw material and graphene raw material respectively until the particle size of the above raw materials meets the requirements, and then take out the powder material to prepare metal wear self-repair material.

[0018] Step S2: After heating polydecene to 120-140°C, add dodecyl stearic acid and lithium hydroxide, stir for 1-2 hours, then add sebacic acid and heat to 180-220°C. Continue stirring for 1-2 hours and then place it in base oil to obtain the modified base oil for preparing metal wear self-repairing materials.

[0019] Step S3: Place the micronized magnesium hydroxysilicate, nano-sized magnesium hydroxysilicate, nano-metal powder, nano-filler powder, and graphene prepared in step S1 into the modified base oil prepared in step S2 and mix them evenly. Then, place the evenly mixed powder, antioxidant, and catalyst into a mixer and stir for at least 1 hour.

[0020] Step S4: Finally, add dispersant and foaming agent into the mixer and continue mixing for at least 20 hours to obtain a self-healing material for metal wear.

[0021] The role and effect of invention

[0022] According to the present invention, a self-repairing material for metal wear in transmission components and support components and a preparation method thereof are used. The repair material is introduced into the friction pair surface between bearings or gears by using a base modified oil as a carrier. When the bearings or gears are under heavy load or high speed conditions, a friction flash temperature of 800℃-1200℃ will be generated on the friction pair surface, thereby inducing micron-sized magnesium hydroxysilicate, nano-sized magnesium hydroxysilicate, nano-metal powder, nano-filler powder and graphene to undergo an internal oxidation reaction on the wear surface, automatically forming an ultra-hard, ultra-slippery and ultra-wear-resistant metal ceramic layer within 10μm, thereby automatically compensating for wear gaps and improving accuracy. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easy to understand, the following embodiments will specifically illustrate this invention.

[0024] Example 1

[0025] This embodiment 1 provides a self-healing material for metal wear in transmission components and support components, wherein the moving component preferably refers to a gear, and the support component preferably refers to a bearing, comprising the following components by weight:

[0026] Micronized magnesium hydroxysilicate 16-27 parts, nano-sized magnesium hydroxysilicate 13-15 parts, nano-metal powder 11-14 parts, nano-filler powder 10-13 parts, graphene 14-19 parts, antioxidant 2-3 parts, catalyst 7-9 parts, dispersant 3-5 parts, foaming agent 4-5 parts, modified base oil 720-990 parts

[0027] Among them, the average particle size of micron-sized magnesium hydroxysilicate is 1–3 μm, while the average particle size of nano-sized magnesium hydroxysilicate, nano-metal powder, nano-filler powder, and graphene is 15–60 nm.

[0028] In this embodiment, the average particle size of the micron-sized magnesium hydroxysilicate is preferably 1 μm.

[0029] In this embodiment, the nano-metal powder includes one or more of indium powder, lithium powder, nickel powder, titanium powder, or aluminum powder.

[0030] In this embodiment, the nanofiller powder includes one or more of the following: magnesium oxide, aluminum oxide, iron oxide, titanium trioxide, calcium oxide, nickel oxide, strontium oxide, zinc oxide, molybdenum oxide, and phosphorus pentoxide.

[0031] In this embodiment, the nanofiller powder includes Bayer process red mud or sintered process red mud.

[0032] In this embodiment, the catalyst comprises a water-soluble phosphate.

[0033] In this embodiment, the antioxidant includes unsaturated fatty acids.

[0034] In this embodiment, the dispersant is one or more of water, anhydrous ethanol, acetone, ethylene glycol, or n-propanol.

[0035] In this embodiment, the foaming agent is azobisisobutyronitrile.

[0036] In this embodiment, the modified base oil includes base oil, polydecene, dodecyl stearic acid, lithium hydroxide, and sebacic acid. The base oil is a mixture of mineral oil and vinyl silicone oil.

[0037] Through the above technical solution, this application uses mineral micron-sized magnesium hydroxysilicate as the main component with a particle size of 1.0-3.0μm; and supplements it with artificially synthesized nano-sized magnesium hydroxysilicate, nano-metal powder, nano-graphene, and nano-filler powder with a particle size of 15-60nm. Finally, it is mixed with antioxidants, catalysts, dispersants, and foaming agents in the modified base oil.

[0038] When the aforementioned materials, using a base modified oil as a carrier, carry the repair material (here, the repair material refers to all materials included in this application other than the base modified oil) onto the friction pair surface within the bearing or gearbox, under heavy load or high-speed conditions, the friction flash temperature between the bearings or gears will reach 800℃-1200℃. This will cause the foaming agent to decompose and release gas. The gas forms microbubbles in the modified base oil, which can be adsorbed onto the surface of various powders and provide lubrication. Simultaneously, the flash temperature will induce an internal oxidation reaction of micron-sized hydroxyl magnesium silicate, nano-sized hydroxyl magnesium silicate, nano-metal powder, nano-filler powder, and graphene on the wear surface, automatically forming an ultra-hard, ultra-slippery, and ultra-wear-resistant metal-ceramic layer within 10μm. This automatically compensates for wear gaps and improves precision. Specifically, micron-sized and nano-sized hydroxyl magnesium silicate undergo a phase transition during the friction between bearings or gears, decomposing to produce magnesium oxide, silicon dioxide, and water, while also releasing oxidizing free oxygen. The magnesium oxide and silicon dioxide produced by the decomposition of magnesium hydroxysilicate both possess numerous chemically active sites on their surfaces, allowing them to combine with nano-metal powders, nano-filler powders, and graphene under flash temperature conditions to form a wear-resistant protective layer (metal-ceramic layer). Simultaneously, free oxygen oxidizes the unsaturated fatty acids in the catalyst, causing them to cross-link. These cross-linking products temporarily coat the surface of the wear-resistant protective layer, providing lubrication, reducing wear on the layer, and improving the repair effect on worn areas of bearings or gears.

[0039] In summary, the cermet layer formed by this application has a hardness 1-2 times higher than that of a metal surface, while maintaining an elastic modulus comparable to that of high-quality alloy steel. Furthermore, after the formation of the cermet layer, the coefficient of friction μ is generally between 0.02 and 0.06, a decrease of over 70% compared to traditional lubricating oil conditions. In addition, this application does not chemically react with lubricating oil, does not alter the oil's viscosity or performance indicators, has no toxic side effects during use, and is harmless to the environment and human body.

[0040] This embodiment 1 also provides a method for preparing a self-healing metal wear material, applicable to any of the above-mentioned self-healing metal wear materials, including the following steps:

[0041] Step S1: Use a ball mill to pulverize magnesium hydroxysilicate raw material, metal powder raw material, filler powder raw material and graphene raw material respectively until the particle size of the above raw materials meets the requirements, and then take out the powder material to prepare metal wear self-repair material.

[0042] Among them, magnesium hydroxysilicate raw materials include the mineral magnesium hydroxysilicate, as well as silicon dioxide and magnesium oxide, which can be artificially synthesized into magnesium hydroxysilicate.

[0043] Specifically, micron-sized magnesium hydroxysilicate with an average particle size of 1–3 μm is obtained by ball milling the mineral magnesium hydroxysilicate.

[0044] Silica and magnesium oxide were ball-milled separately. Sodium oxide and phosphorus oxide were then treated with surface modifiers and mixed with the spheroidized silica and magnesium oxide. The mixture was then placed back into the ball mill for spheroidization. Under normal pressure and shear force, the instantaneous high temperature generated in the high-pressure contact zone removed the surface modifiers from the sodium oxide and phosphorus oxide, causing a chemical reaction. This resulted in a microscopic explosion in the microscopic high-pressure contact zone, creating a microscopic high-pressure vacuum. Ultimately, silica and magnesium oxide reacted under this environment, instantaneously synthesizing artificial hydroxyl magnesium silicate. Nano-sized hydroxyl magnesium silicate with an average particle size of 15–60 nm was obtained by ball milling the artificial hydroxyl magnesium silicate and the resulting spheroidized material.

[0045] Step S2: After heating polydecene to 120-140°C, add dodecyl stearic acid and lithium hydroxide, stir for 1-2 hours, then add sebacic acid and heat to 180-220°C. Continue stirring for 1-2 hours and then place it in base oil to obtain the modified base oil for preparing metal wear self-repairing materials.

[0046] Step S3: Place the micronized magnesium hydroxysilicate, nano-sized magnesium hydroxysilicate, nano-metal powder, nano-filler powder, and graphene prepared in step S1 into the modified base oil prepared in step S2 and mix them evenly. Then, place the evenly mixed powder, antioxidant, and catalyst into a mixer and stir for at least 1 hour.

[0047] Step S4: Finally, add dispersant and foaming agent into the mixer and continue mixing for at least 20 hours to obtain a self-healing material for metal wear.

[0048] The role and effect of the embodiments

[0049] According to the present invention, a self-repairing material for metal wear in transmission components and support components and a preparation method thereof are used. The repair material is introduced into the friction pair surface between bearings or gears by using a base modified oil as a carrier. When the bearings or gears are under heavy load or high speed conditions, a friction flash temperature of 800℃-1200℃ will be generated on the friction pair surface, thereby inducing micron-sized magnesium hydroxysilicate, nano-sized magnesium hydroxysilicate, nano-metal powder, nano-filler powder and graphene to undergo an internal oxidation reaction on the wear surface, automatically forming an ultra-hard, ultra-slippery and ultra-wear-resistant metal ceramic layer within 10μm, thereby automatically compensating for wear gaps and improving accuracy.

[0050] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A metal wear self-repairing material for a transmission member, a bearing member, characterized by, Comprise the following components by weight parts: Micron hydroxyl magnesium silicate 16-27 parts, nano hydroxyl magnesium silicate 13-15 parts, nano metal powder 11-14 parts, nano filling powder 10-13 parts, graphene 14-19 parts, antioxidant 2-3 parts, catalyst 7-9 parts, dispersing agent 3-5 parts, foaming agent 4-5 parts, modified base oil 720-990 parts, Wherein, the average particle size of the micron hydroxyl magnesium silicate is 1-3 μm, and the average particle size of the nano hydroxyl magnesium silicate, the nano metal powder, the nano filling powder, and the graphene is 15-60 nm.

2. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein The nano metal powder comprises one or more of indium powder, lithium powder, nickel powder, titanium powder, or aluminum powder.

3. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein The nano filling powder comprises one or more of magnesium oxide, aluminum oxide, iron oxide, titanium dioxide, calcium oxide, nickel oxide, strontium oxide, zinc oxide, molybdenum oxide, and phosphorus pentoxide.

4. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein The nano filling powder comprises Bayer red mud or sintered red mud.

5. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein, The catalyst comprises water-soluble phosphate.

6. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein The antioxidant comprises unsaturated fatty acid.

7. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein The dispersing agent is one or more of water, anhydrous ethanol, acetone, ethylene glycol, or n-propanol.

8. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein The foaming agent is azobis isobutyronitrile.

9. The metal wear self-repairing material for transmission and support according to claim 1, characterized in that: wherein The modified base oil comprises base oil, polydecene, dodecyl hydroxystearic acid, lithium hydroxide, and sebacic acid.

10. A method of preparing a metal wear self-repairing material, characterized by: The metal wear self-repairing material according to any one of claims 1-9, comprising the following steps: Step S1, using a ball mill to ball mill hydroxyl magnesium silicate raw material, metal powder raw material, filling powder raw material, and graphene raw material respectively until the particle size of the above raw materials after crushing meets the requirements, and then taking out to obtain a powder material for preparing the metal wear self-repairing material; Step S2, heating the polydecene to 120-140℃, then adding the dodecyl hydroxystearic acid and the lithium hydroxide, followed by stirring for 1-2 h, then adding the sebacic acid and heating to 180-220℃, and continuing to stir for 1-2 h, and then placing in the base oil to obtain a modified base oil for preparing the metal wear self-repairing material; Step S3, the micron hydroxyl magnesium silicate prepared in step S1, the nano hydroxyl magnesium silicate, the nano metal powder, the nano filling powder, and the graphene are mixed uniformly in the modified base oil prepared in step S2, and then the mixed powder, the antioxidant, and the catalyst are placed in a blender and stirred for at least 1 hour; Step S4, finally, the dispersant and the foaming agent are added to the blender, and the stirring is continued for at least 20 hours to obtain the metal wear self-repairing material.