CN101736385A - Treatment process of self-lubricating surface of aluminium alloy - Google Patents
Treatment process of self-lubricating surface of aluminium alloy Download PDFInfo
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- CN101736385A CN101736385A CN200810235983A CN200810235983A CN101736385A CN 101736385 A CN101736385 A CN 101736385A CN 200810235983 A CN200810235983 A CN 200810235983A CN 200810235983 A CN200810235983 A CN 200810235983A CN 101736385 A CN101736385 A CN 101736385A
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Abstract
The invention relates to a treatment process of the self-lubricating surface of an aluminium alloy, comprising the following steps of: firstly, dipping a surface anode oxidized aluminium alloy in nano lubricating particle aqueous dispersion liquid for ultrasonic oscillation; continuously dipping the anode oxidized aluminium alloy in the nano lubricating particle aqueous dispersion liquid after the ultrasonic oscillation is ended; then taking the anode oxidized aluminium alloy out of the nano lubricating particle aqueous dispersion liquid and then naturally drying; and finally preserving the heat of the dried anode oxidized aluminium alloy at the temperature of 340-390 DEG C for 30-120min; and taking the anode oxidized aluminium alloy out of a furnace for air cooling after the heat preservation is ended. A lubricating coating is formed on the surface of the aluminium alloy by the treatment process, and the lubricating coating and the surface of the aluminium alloy are combined tightly, enabling the surface of the aluminium alloy to have very low friction coefficient and longer self-lubricating service life.
Description
Technical field
The present invention relates to a kind of treatment process of aluminium alloy self-lubricating surface, belong to the surface treatment technology of material field.
Background technology
For solve aluminum alloy material surface matter soft, wear no resistance, weakness such as frictional coefficient height, need carry out the tribology surface modification treatment of aluminium and aluminium alloy.At first, carry out hard anodizing in aluminum alloy surface, the various oilness materials of deposition form slip coating in pellumina surface and micropore subsequently, thereby the aluminum alloy surface frictional coefficient is reduced.
The alumina formwork surface arrangement a large amount of nano level holes, exist higher free energy, solid surface can not reduce the surface free energy of system with the method that reduces surface-area as liquid, can only reduce the free energy of system by the absorption external agency, make the surface be in more stable status, so the porous alumina formwork surface exist very big adsorptive power to external agency.Anodised aluminium is immersed in the nano lubricating particle aqueous dispersion, and lubricated granules will be deposited on the anodised aluminium surface, and a part of lubricated granules will be deposited in the oxide film nanoporous.In order to strengthen the activity of lubricated granules, traditional method is that the lubricated granules aqueous dispersions is heated, and enters amounts of particles in the hole with increase, and this method is called the hot dipping stain.Yet at high temperature, nano particle is easy to take place to reunite and grows up, and when particle diameter can't enter in the hole during greater than the aperture of aluminum oxide porous film, continuing to grow up even can forming precipitation attaches to aluminum alloy surface, causes the ununiformity of slip coating.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of treatment process of aluminium alloy self-lubricating surface is provided.
Purpose of the present invention is achieved through the following technical solutions:
The treatment process of aluminium alloy self-lubricating surface may further comprise the steps---
1. ultrasonic activation: will be immersed in through surperficial anodised aluminium alloy and carry out sonic oscillation in the nano lubricating particle aqueous dispersion;
2. follow-up dipping: after sonic oscillation finished, the anodic oxidation aluminium alloy continued dipping in the nano lubricating particle aqueous dispersion;
3. dry: as the anodic oxidation aluminium alloy to be taken out nature dry from the nano lubricating particle aqueous dispersion;
4. thermal treatment: the anodic oxidation aluminium alloy after will drying is incubated under 340 ℃～390 ℃ temperature, and soaking time is 30min～120min, and insulation finishes the back and take out air cooling from stove.
Further, the treatment process of above-mentioned aluminium alloy self-lubricating surface, described nano lubricating particle aqueous dispersion is a polytetrafluoroethylene (PTFE) nano lubricating particle aqueous dispersion, or molybdenum disulfide nano lubricated granules aqueous dispersions, or the mixing water of tetrafluoroethylene and molybdenumdisulphide disperses liquid.
Further, the treatment process of above-mentioned aluminium alloy self-lubricating surface, 1. the time of middle sonic oscillation is 5min～30min to step.
Again further, the treatment process of above-mentioned aluminium alloy self-lubricating surface, 2. the time of middle dipping is 20min～60min to step.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
Adopt technology of the present invention to form slip coating in aluminum alloy surface, slip coating combines closely with aluminum alloy surface, thereby makes aluminum alloy surface have very low frictional coefficient and very long self-lubricating life-span.Wherein, the sonic oscillation activation effect is better than traditional hot dipping stain method, and can not cause lubricated granules to reunite; Follow-up impregnation technology has further improved the deposition of lubricated granules in oxide film surface and hole; Naturally dry technology and make that the aluminum alloy surface slip coating is complete, do not have crackle; Thermal treatment process has guaranteed that slip coating and aluminum alloy surface combine closely, and technology is succinct, and economic benefit and social effect are remarkable.
Embodiment
The present invention proposes the treatment process of aluminium alloy self-lubricating surface, utilize sonic oscillation that the nano lubricating particle dispersion is activated, ultrasonic wave is the propagation of mechanical shock energy, in liquid, form and effectively stir with mobile, particle in the nano lubricating particle aqueous dispersion is produced pulverizing, dissemination, make part nano lubricating particle size reduce.Often there are small bubbles some vacuum or that contain a small amount of gas or steam in the liquid, when the ultrasonic wave of certain frequency acts on liquid, it is big that small bubbles become under ultrasonication gradually, the sparse stage of sound wave rises greatly by small bubbles rapidly, the compression stage small bubbles of sound wave are again by adiabatic compression, until burying in oblivion.Bury in oblivion in the process, small bubbles inside reaches high temperature and several thousand atmospheric high pressure of several thousand degree, promptly be called cavitation effect of ultrasonic waves, this effect makes cavitation bubble moment in collapse process very rapidly produce high temperature, high pressure and intensive shockwave, thereby, improve mass transfer velocity, the penetrating power of lubricated granules aqueous dispersions, good activation is played on the alumina formwork surface, strengthen adsorptive power lubricated granules.
Technology of the present invention mainly comprises:
(1) ultrasonic activation
To be immersed in nano lubricating particle aqueous dispersion (polytetrafluoroethylene PTFE nano lubricating particle aqueous dispersion through surperficial anodised aluminium alloy, or molybdenum disulfide nano lubricated granules aqueous dispersions, or the mixing water of tetrafluoroethylene and molybdenumdisulphide dispersion liquid) carry out sonic oscillation in, ultrasonic time is at 5min～30min.
(2) follow-up dipping
Under action of ultrasonic waves, lubricated granules partly enters in the micro-pore of aluminum oxide porous film, but because hyperacoustic strong vibration, the loading level of lubricated granules is seldom; After through the sonic oscillation activation, porous alumina formwork strengthens the adsorptive power of lubricated granules, the mass transfer velocity of lubricated granules aqueous dispersions, penetrating power improve simultaneously, continue this moment pellumina is flooded in the lubricated granules aqueous dispersions, to make more particles enter hole and be adsorbed on porous surface, dipping time is at 20min～60min.
(3) drying
After the anodic oxidation aluminium alloy takes out from the lubricated granules aqueous dispersions, the moisture in the surface lubrication coating will evaporate, if the too fast meeting of velocity of evaporation stays crackle in aluminum alloy surface, therefore adopt the nature mode of drying to make the moisture spontaneous evaporation.
(4) thermal treatment
Aluminium alloy is incubated 30min～120min under 340 ℃～390 ℃ temperature, takes out the back air cooling; Heat treated purpose is the bonding force that strengthens slip coating and pellumina, during thermal treatment polytetrafluoroethylene (PTFE) is heated to fusion, the dispersive individual particle becomes whole by mutual diffusion fusion bonding, and and aluminum oxide between local the fusion taken place, form firm bonding force.
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
To be immersed in the PTFE nano lubricating particle aqueous dispersion through surperficial anodised aluminium alloy earlier and carry out sonic oscillation 10min.Then, the anodic oxidation aluminium alloy is continued dipping 30min in PTFE nano lubricating particle aqueous dispersion.Again the anodic oxidation aluminium alloy being taken out nature from PTFE nano lubricating particle aqueous dispersion dries.Anodic oxidation aluminium alloy after will drying at last is incubated under 350 ℃ of temperature, takes out air cooling behind the insulation 60min from stove.
Embodiment 2:
To be immersed in the PTFE nano lubricating particle aqueous dispersion through surperficial anodised aluminium alloy earlier and carry out sonic oscillation 20min.Then the anodic oxidation aluminium alloy is continued dipping in PTFE nano lubricating particle aqueous dispersion, dipping time is 20min.Again the anodic oxidation aluminium alloy being taken out nature from PTFE nano lubricating particle aqueous dispersion dries.Anodic oxidation aluminium alloy after will drying at last is incubated under 380 ℃ of temperature, takes out air cooling behind the insulation 30min from stove.
Embodiment 3:
At first will be immersed in the PTFE nano lubricating particle aqueous dispersion and carry out sonic oscillation 30min through surperficial anodised aluminium alloy.Then, the anodic oxidation aluminium alloy is continued dipping 40min in PTFE nano lubricating particle aqueous dispersion.Again the anodic oxidation aluminium alloy being taken out nature from PTFE nano lubricating particle aqueous dispersion dries.Anodic oxidation aluminium alloy after will drying at last is incubated under 340 ℃ of temperature, takes out air cooling behind the insulation 120min from stove.
Embodiment 4:
To be immersed in the PTFE nano lubricating particle aqueous dispersion through surperficial anodised aluminium alloy earlier and carry out sonic oscillation 5min.Then the anodic oxidation aluminium alloy is continued dipping in PTFE nano lubricating particle aqueous dispersion, dipping time is 60min.Again the anodic oxidation aluminium alloy being taken out nature from PTFE nano lubricating particle aqueous dispersion dries.Anodic oxidation aluminium alloy after will drying at last is incubated under 390 ℃ of temperature, takes out air cooling behind the insulation 50min from stove.
To sum up, form slip coating by above-mentioned technology in aluminum alloy surface, slip coating combines closely with aluminum alloy surface, makes aluminum alloy surface have very low frictional coefficient and very long self-lubricating life-span.Its sonic oscillation activation effect is better than traditional hot dipping stain method, and can not cause lubricated granules to reunite.Follow-up impregnation technology has further improved the deposition of lubricated granules in oxide film surface and hole.Naturally dry technology and make that the aluminum alloy surface slip coating is complete, do not have crackle.Thermal treatment process has guaranteed that slip coating and aluminum alloy surface combine closely.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (4)
1. the treatment process of aluminium alloy self-lubricating surface is characterized in that: specifically may further comprise the steps
1. ultrasonic activation: will be immersed in through surperficial anodised aluminium alloy and carry out sonic oscillation in the nano lubricating particle aqueous dispersion;
2. follow-up dipping: after sonic oscillation finished, the anodic oxidation aluminium alloy continued dipping in the nano lubricating particle aqueous dispersion;
3. dry: as the anodic oxidation aluminium alloy to be taken out nature dry from the nano lubricating particle aqueous dispersion;
4. thermal treatment: the anodic oxidation aluminium alloy after will drying is incubated under 340 ℃～390 ℃ temperature, and soaking time is 30min～120min, and insulation finishes the back and take out air cooling from stove.
2. the treatment process of aluminium alloy self-lubricating surface according to claim 1, it is characterized in that: described nano lubricating particle aqueous dispersion is a polytetrafluorethylenano nano lubricated granules aqueous dispersions.
3. the treatment process of aluminium alloy self-lubricating surface according to claim 1 is characterized in that: step 1. in time of sonic oscillation be 5min～30min.
4. the treatment process of aluminium alloy self-lubricating surface according to claim 1 is characterized in that: step 2. in time of dipping be 20min～60min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810235983A CN101736385A (en) | 2008-11-19 | 2008-11-19 | Treatment process of self-lubricating surface of aluminium alloy |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103392030A (en) * | 2011-02-18 | 2013-11-13 | 爱信轻金属株式会社 | Surface treatment method for metal member and metal member obtained by same |
| CN105114499A (en) * | 2015-09-01 | 2015-12-02 | 中南大学 | Preparation method of molybdenum disulfide coating of brake pad for high-speed train |
| CN107236978A (en) * | 2016-07-09 | 2017-10-10 | 平顶山市美伊金属制品有限公司 | The enclosure method of the packing material and pore of closing oxidation rear substrate surface pore |
| CN111993270A (en) * | 2020-09-14 | 2020-11-27 | 湖南理工学院 | Nano-layer lubrication diamond grinding wheel grinding device based on shock wave cavitation effect |
| CN112025554A (en) * | 2020-09-14 | 2020-12-04 | 湖南理工学院 | Nano-layer lubricating diamond grinding wheel grinding method based on shock wave cavitation effect |
| CN112275565A (en) * | 2020-10-10 | 2021-01-29 | 青岛黄海学院 | Automatic treatment device and method for aluminum alloy self-lubricating surface |
| CN112708914A (en) * | 2020-11-27 | 2021-04-27 | 南京肯特复合材料股份有限公司 | Forming preparation method of friction plate applied to mechanical braking |
-
2008
- 2008-11-19 CN CN200810235983A patent/CN101736385A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103392030A (en) * | 2011-02-18 | 2013-11-13 | 爱信轻金属株式会社 | Surface treatment method for metal member and metal member obtained by same |
| CN103392030B (en) * | 2011-02-18 | 2017-02-15 | 爱信轻金属株式会社 | Surface treatment method for metal member and metal member obtained by same |
| CN105114499A (en) * | 2015-09-01 | 2015-12-02 | 中南大学 | Preparation method of molybdenum disulfide coating of brake pad for high-speed train |
| CN107236978A (en) * | 2016-07-09 | 2017-10-10 | 平顶山市美伊金属制品有限公司 | The enclosure method of the packing material and pore of closing oxidation rear substrate surface pore |
| CN111993270A (en) * | 2020-09-14 | 2020-11-27 | 湖南理工学院 | Nano-layer lubrication diamond grinding wheel grinding device based on shock wave cavitation effect |
| CN112025554A (en) * | 2020-09-14 | 2020-12-04 | 湖南理工学院 | Nano-layer lubricating diamond grinding wheel grinding method based on shock wave cavitation effect |
| CN111993270B (en) * | 2020-09-14 | 2021-08-13 | 湖南理工学院 | Nano-layer lubrication diamond grinding wheel grinding device based on shock wave cavitation effect |
| CN112025554B (en) * | 2020-09-14 | 2021-08-13 | 湖南理工学院 | Nano-layer lubricating diamond grinding wheel grinding method based on shock wave cavitation effect |
| CN112275565A (en) * | 2020-10-10 | 2021-01-29 | 青岛黄海学院 | Automatic treatment device and method for aluminum alloy self-lubricating surface |
| CN112275565B (en) * | 2020-10-10 | 2021-09-17 | 山东省轻工工程学校 | Automatic treatment device and method for aluminum alloy self-lubricating surface |
| CN112708914A (en) * | 2020-11-27 | 2021-04-27 | 南京肯特复合材料股份有限公司 | Forming preparation method of friction plate applied to mechanical braking |
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Open date: 20100616 |