CN114276864B - Water-based stainless steel fastener anti-seizure agent and preparation method thereof - Google Patents
Water-based stainless steel fastener anti-seizure agent and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a water-based anti-seizure agent for a stainless steel fastener and a preparation method thereof, belonging to the technical field of anti-seizure of stainless steel fasteners. The anti-seizure agent for the water-based stainless steel fastener comprises the following components in parts by weight: 20-35 parts of colloidal graphite powder, 10-20 parts of copper powder, 10-15 parts of tungsten sulfide, 5-10 parts of cerium oxide, 2-6 parts of glass powder, 25-40 parts of liquid lubricant, 5-10 parts of suspending agent and water. Before the anti-seizing agent is applied, only the surface of stainless steel fasteners such as bolts and the like needs to be slightly wiped to remove oil stains, and the bolts can be repeatedly used for a long time at high temperature, namely, the bolts can be reused without being treated and recoated after being disassembled.
Description
Technical Field
The invention relates to a water-based anti-seizure agent for a stainless steel fastener and a preparation method thereof, belonging to the technical field of anti-seizure of stainless steel fasteners.
Background
Stainless steel fasteners have a wide range of uses, but due to their low stiffness, tend to deform and become seized particularly when heated. The equipment using the fasteners needs to be maintained and checked after running for a period of time, the bolts are usually required to be disassembled, and in the process of screwing and heating, the bolts generate tearing and furrow plowing effects due to surface cold welding, subsequent displacement and rotation processes caused by thread stress, elastic-plastic deformation and the like. The torn metal chips become abrasive particles, the surfaces of the threads are seriously scratched, and the threads are seriously plastically deformed, and the bolts are seriously fastened in the states for a long time, so that the bolts cannot be disassembled and can only be cut to be scrapped.
Several solutions have also been proposed to the common phenomenon of stainless steel bolts seizing and sticking buttons. The use of anti-adhesive materials in these approaches is a convenient and efficient means. However, the existing anti-sticking materials have various defects such as inconvenient use, the bolt needs to be strictly cleaned before being painted, the cleaning workload is larger when the bolt is used again after being disassembled, and then the anti-sticking agent needs to be coated again, the price of the commercially available anti-sticking and anti-sticking agent is usually thousands of yuan or even tens of thousands of yuan per kilogram, the use temperature is not high, the temperature is difficult to reach more than 500 ℃, the components are complex, the preparation process is long, and mineral oil materials (which volatilize at 400-500 ℃ and pollute the environment) are almost used.
The API oil sleeve thread sealing composition and the preparation method thereof are disclosed as 200910068957.9, which comprises 40-50% of base grease, 5-10% of dimethyl silicon oil, 16.5-20% of flaked graphite powder, 6-9% of polytetrafluoroethylene powder, 0.5-1.0% of expanded graphite powder, 1-2% of white carbon black, 3-4% of sericite powder, 3-4% of light calcium carbonate and 10-15% of bronze powder. The application number is 201410546039.3 'copper-based anti-seizure high-temperature thread sealing lubricating grease and a preparation method thereof', which consists of 65-85 parts of base oil, 10-15 parts of dodecahydroxystearic acid, 3-8 parts of lithium hydroxide, 1-5 parts of boric acid, 5-7 parts of molybdenum disulfide and 3-5 parts of dodecenyl succinic acid. The application is 201610875914.1' a long-life anti-seizure lubricating grease composition and the preparation method thereof, wherein the lubricating grease composition comprises 82.9% -97.5% of compound calcium sulfonate grease, 0.3% -1.0% of antioxidant and metal deactivator, 0.6% -4.8% of antirust agent, 0.3% -3.2% of solid lubricant, 1.0-4.5% of solid filler and 0.3% -3.6% of tackifier.
Disclosure of Invention
In order to solve the problem that the existing anti-seizure agent is low in use temperature, the invention provides an anti-seizure agent which can be used in a high-temperature environment of more than 500 ℃.
The anti-seizure agent for the water-based stainless steel fastener comprises the following components in parts by weight: 20-35 parts of colloidal graphite powder, 10-20 parts of copper powder, 10-15 parts of tungsten sulfide, 5-10 parts of cerium oxide, 2-6 parts of glass powder, 25-40 parts of liquid lubricant, 5-10 parts of suspending agent and water.
In one embodiment, the anti-seizure agent for the water-based stainless steel fastener consists of the following components in parts by weight: 22-30 parts of colloidal graphite powder, 10-20 parts of copper powder, 10-15 parts of tungsten sulfide, 8-10 parts of cerium oxide, 4-6 parts of glass powder, 30-40 parts of liquid lubricant, 5-10 parts of suspending agent and water.
In one embodiment, the anti-seizure agent comprises water in an amount of: the Baume degree of the anti-seizure agent for the water-based stainless steel fastener is adjusted by water, so that the degree Be is more than or equal to 90 at room temperature. Preferably the angle Be is from 90 to 100.
In one embodiment, the colloidal graphite powder has a fineness <10 μm; the purity of the copper powder is more than or equal to 99.50 percent, the fineness is more than 800 meshes, and the screen residue is less than 0.15 percent; the fineness of tungsten sulfide is less than 10 μm; the fineness of the cerium oxide is more than 320 meshes; the fineness of the glass powder is more than 800 meshes, and the screen residue is less than 0.3 percent.
In one embodiment, the liquid lubricant is glycerol or polyethylene glycol, wherein the molecular weight of the polyethylene glycol is between 200 and 2000.
In one embodiment, the suspending agent is a lithium-based lubricant; preferably, the preparation method of the lithium-based lubricating soil comprises the following steps: mixing the lithium bentonite and water, standing for more than 24 hours to activate the lithium bentonite, adding a liquid lubricant, and dispersing into the lithium bentonite; preferably, the weight ratio of the lithium bentonite to the water to the liquid lubricant is 1; more preferably, the weight ratio of the lithium bentonite, water and the liquid lubricant is 1.
The invention solves the second technical problem by providing a preparation method of the anti-seizure agent for the water-based stainless steel fastener.
The preparation method of the anti-seizure agent for the water-based stainless steel fastener comprises the steps of uniformly mixing the components of the anti-seizure agent for the water-based stainless steel fastener, and transferring the mixture to a sand mill for sand milling for not less than 60 minutes.
In one embodiment, the blending method comprises: the components are mixed and then placed under a high-speed dispersion machine, the components are uniformly stirred at the speed of 100-200 r/min until the slurry becomes thicker gradually, at the moment, the distance between a dispersion disc and the bottom of a charging barrel is adjusted to enable the vortex to be in a shallow basin shape, the rotating speed is increased to stir at the speed of 700-1500r/min for no less than 30 minutes, in order to prevent the temperature from rising too high during dispersion, a jacket is adopted to be cooled by water, and after dispersion is finished, the slurry is transferred to a sand mill for sanding.
The invention has the beneficial effects that:
1. the invention effectively solves the defects of the prior anti-seizure material, such as inconvenient use, and the like, and the anti-seizure agent only needs to slightly wipe the surface of a stainless steel fastener, such as a bolt, and the like to remove oil stains before coating, and the bolt can be repeatedly used for a long time at high temperature, namely, can be reused without processing and recoating after being disassembled.
2. The price of the anti-seizure agent material is greatly lower than that of the anti-seizure and anti-sticking agent sold on the market at present, the components are simpler, the raw materials are widely available, and the preparation is convenient.
3. The product of the invention is an aqueous anti-seizure agent, is environment-friendly and does not use mineral oil materials.
4. The anti-seizure agent for the stainless steel fastener in the high-temperature environment, which is prepared by adopting the technical scheme, has excellent index performance, can bear the temperature of more than 500 ℃, and has stable pasty fluid and good cold-hot alternating stability. The clamp has no corrosion to stainless steel (54 +/-2 ℃), the clamp is clamped and used on a product with double equipment in 2018, and almost ten thousand bolts with different specifications are clamped and cannot be detached at high temperature of hundreds of degrees after actual operation for three years.
Detailed Description
The anti-seizure agent for the water-based stainless steel fastener comprises the following components in parts by weight: 20-35 parts of colloidal graphite powder, 10-20 parts of copper powder, 10-15 parts of tungsten sulfide, 5-10 parts of cerium oxide, 2-6 parts of glass powder, 25-40 parts of liquid lubricant, 5-10 parts of suspending agent and water.
Wherein, the colloidal graphite powder is used as a solid lubricant, and the cerium oxide is used as a high-temperature solid lubricant additive.
In order to improve the performance of the anti-seizure agent, in one embodiment, the anti-seizure agent for the water-based stainless steel fastener is characterized by comprising the following components in parts by weight: 22-30 parts of colloidal graphite powder, 10-20 parts of copper powder, 10-15 parts of tungsten sulfide, 8-10 parts of cerium oxide, 4-6 parts of glass powder, 30-40 parts of liquid lubricant, 5-10 parts of suspending agent and water.
According to the invention, the specific tungsten and cerium compounds are added, so that the prepared stainless steel fastener anti-seizure agent has better comprehensive performance.
In one embodiment, the amount of water used in the anti-seizure agent is controlled to be: the Baume degree of the anti-seizure agent for the water-based stainless steel fastener is adjusted by water, so that the degree Be is more than or equal to 90 at room temperature. Preferably the angle Be is from 90 to 100.
In one embodiment, the colloidal graphite powder has a fineness <10 μm; the purity of the copper powder is more than or equal to 99.50 percent, the fineness is more than 800 meshes, and the screen residue is less than 0.15 percent; the fineness of tungsten sulfide is less than 10 μm; the fineness of the cerium oxide is more than 320 meshes; the fineness of the glass powder is more than 800 meshes, and the screen residue is less than 0.3 percent.
In one embodiment, the liquid lubricant is glycerol or polyethylene glycol, wherein the molecular weight of the polyethylene glycol is between 200 and 2000.
In one embodiment, the suspending agent is a lithium-based lubricating soil; preferably, the preparation method of the lithium-based lubricating soil comprises the following steps: mixing the lithium bentonite and water, standing for more than 24 hours to activate the lithium bentonite, adding a liquid lubricant, and dispersing into the lithium bentonite; preferably, the weight ratio of the lithium bentonite to the water to the liquid lubricant is 1; more preferably, the weight ratio of the lithium bentonite, water and the liquid lubricant is 1. Wherein, the liquid lubricant used for preparing the suspending agent is glycerol or polyethylene glycol, and the molecular weight of the polyethylene glycol is between 200 and 2000.
In the preparation of the lithium-based lubricant, the dispersion may be carried out at 300 to 1000 r/min using a high-speed disperser.
The invention solves the second technical problem by providing a preparation method of the anti-seizure agent for the water-based stainless steel fastener.
The preparation method of the anti-seizure agent for the water-based stainless steel fastener comprises the steps of uniformly mixing the components of the anti-seizure agent for the water-based stainless steel fastener, and transferring the mixture to a sand mill for sand milling for not less than 60 minutes.
In one embodiment, the blending method comprises: the components are mixed and then placed under a high-speed dispersion machine, the components are uniformly stirred at the speed of 100-200 r/min until the slurry becomes thicker gradually, at the moment, the distance between a dispersion disc and the bottom of a charging barrel is adjusted to enable the vortex to be in a shallow basin shape, the rotating speed is increased to stir at the speed of 700-1500r/min for no less than 30 minutes, in order to prevent the temperature from rising too high during dispersion, a jacket is adopted to be cooled by water, and after dispersion is finished, the slurry is transferred to a sand mill for sanding.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the invention to the embodiments described.
Examples
Preparing anti-seizure agents S1-S3 and D1-D2.
1. Measuring raw materials according to the amount shown in table 1; the amount of distilled water was determined based on the ° Be of the bite formulated at room temperature. Wherein the fineness of the colloidal graphite powder is less than 10 μm; the purity of the copper powder is more than or equal to 99.50 percent, the fineness is more than 800 meshes, and the screen residue is less than 0.15 percent; the fineness of tungsten sulfide is less than 10 mu m; the fineness of the cerium oxide is more than 320 meshes; the fineness of the glass powder is more than 800 meshes, and the screen residue is less than 0.3 percent.
The preparation method of the suspending agent lithium-based lubricating soil used in each experiment in table 1 is as follows: mixing the lithium bentonite and water, standing for more than 24 hours to activate the lithium bentonite, adding a liquid lubricant, and dispersing into the lithium bentonite; the weight ratio of the lithium bentonite, water and the liquid lubricant is 1.
2. Preparation: the raw materials are placed under a high-speed dispersion machine, the raw materials are stirred uniformly at the speed of R1 until the slurry becomes thicker gradually, the distance between a dispersion disc and the bottom of a charging barrel is adjusted at the moment to enable the vortex to be in a shallow basin shape, the rotating speed is increased after all the raw materials are added, the raw materials are stirred at the speed of R2 for T2 minutes, and in order to prevent the temperature from rising too high during dispersion, a jacket is adopted to be filled with water for cooling. After dispersion is finished, transferring the stainless steel fastener to a sand mill for sanding for S minutes to obtain the anti-locking seizure agent for the stainless steel fastener in the high-temperature environment, wherein the specific scheme is shown in Table 2.
TABLE 1
TABLE 2
| R1 (R/min) | R2 (R/min) | T2 | S | |
| S1 | 100 | 800 | 35 | 60 |
| S2 | 150 | 800 | 55 | 70 |
| S3 | 160 | 800 | 45 | 60 |
| D1 | 100 | 800 | 35 | 60 |
| D2 | 100 | 800 | 35 | 60 |
Test examples
And (3) applying the S1-S3 and the D1-D2 to bolts with different brands, wherein the using conditions are shown in a table 3.
TABLE 3
Claims (7)
1. The water-based anti-seizure agent for the stainless steel fastener is characterized by comprising the following components in parts by weight: 20-35 parts of colloidal graphite powder, 10-20 parts of copper powder, 10-15 parts of tungsten sulfide, 5-10 parts of cerium oxide, 2-6 parts of glass powder, 25-40 parts of liquid lubricant, 5-10 parts of suspending agent and water; the amount of water used is: adjusting the Baume degree of the water-based stainless steel fastener anti-seizure agent by using water to ensure that the degree Be of the water-based stainless steel fastener anti-seizure agent is more than or equal to 90 at room temperature;
the liquid lubricant is glycerol or polyethylene glycol, wherein the molecular weight of the polyethylene glycol is 200-2000;
the suspending agent is lithium-based lubricating soil, and the preparation method of the lithium-based lubricating soil comprises the following steps: mixing the lithium bentonite and water, standing for more than 24 hours to activate the mixture, adding a liquid lubricant, and dispersing the mixture into the lithium bentonite, wherein the weight ratio of the lithium bentonite to the water to the liquid lubricant is 1-5.
2. The water-based stainless steel fastener anti-seizure agent according to claim 1, characterized by consisting of the following components in parts by weight: 22-30 parts of colloidal graphite powder, 10-20 parts of copper powder, 10-15 parts of tungsten sulfide, 8-10 parts of cerium oxide, 4-6 parts of glass powder, 30-40 parts of liquid lubricant, 5-10 parts of suspending agent and water.
3. The aqueous stainless steel fastener anti-seize agent according to claim 1 or 2, wherein ° Be is 90 to 100.
4. The aqueous stainless steel fastener anti-seizure agent of claim 1, wherein: the fineness of the colloidal graphite powder is less than 10 mu m; the purity of the copper powder is more than or equal to 99.50 percent, the fineness is more than 800 meshes, and the screen residue is less than 0.15 percent; the fineness of tungsten sulfide is less than 10 μm; the fineness of the cerium oxide is more than 320 meshes; the fineness of the glass powder is more than 800 meshes, and the screen residue is less than 0.3 percent.
5. The aqueous stainless steel fastener anti-seizure agent of claim 1, wherein the weight ratio of lithium bentonite, water and liquid lubricant is 1.
6. The preparation method of the anti-seizure agent for the water-based stainless steel fastener is characterized in that the components of the anti-seizure agent for the water-based stainless steel fastener according to any one of claims 1 to 5 are uniformly mixed and then transferred to a sand mill for sand milling for not less than 60 minutes.
7. The preparation method of the water-based stainless steel fastener anti-seizure agent according to claim 6, characterized in that the blending method comprises: the components are mixed and then placed under a high-speed dispersion machine, the components are uniformly stirred at the speed of 100-200 r/min until the slurry becomes thicker gradually, at the moment, the distance between a dispersion disc and the bottom of a charging barrel is adjusted to enable the vortex to be in a shallow basin shape, the rotating speed is increased to stir at the speed of 700-1500r/min for no less than 30 minutes, in order to prevent the temperature from rising too high during dispersion, a jacket is adopted to be cooled by water, and after dispersion is finished, the slurry is transferred to a sand mill for sanding.
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