CN103509641A - Hexagonal boron nitride base slide plate lubricant and preparation method thereof - Google Patents
Hexagonal boron nitride base slide plate lubricant and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a hexagonal boron nitride base slide plate lubricant and a preparation method thereof. The hexagonal boron nitride base slide plate lubricant comprises the following components in parts by weight: 20 to 50 parts of hexagonal boron nitride powder, 1 to 4 parts of carbon black, 0.5 to 2 parts of bentonite, 2 to 5 parts of alpha-high temperature alumina powder, 3 to 9 parts of silica sol, 1 to 3 parts of white emulsion, 1 to 5 parts of carboxymethylcellulose sodium, 0.1 to 0.5 part of tween, 0.5 to 1.5 parts of glycol, and 0.1 to 0.5 parts of antiseptic, the balance being water. The preparation method of the hexagonal boron nitride base slide plate lubricant comprises the following technology steps: (1) adding silica sol, white emulsion, carboxymethylcellulose sodium, tween, glycol, antiseptic and water into a high-speed mixer so as to obtain a pre-prepared solution; (2) then adding hexagonal boron nitride powder, carbon black, bentonite, and alpha-high temperature alumina powder into the pre-prepared solution, and stirring so as to obtain the hexagonal boron nitride base slide plate lubricant.
Description
Technical field
the present invention relates to a kind of slide gate nozzle sliding plate lubricant coating, particularly relate to a kind of water base lubricant that improves the lubricated and high-temperature oxidation resistance of sled surface, belong to field of lubricant.
Background technology
slide gate nozzle is that a set of ladle (or tundish) bottom that is installed on is in order to control the device of Molten Steel Flow, comprise lower nozzle brick and upper lower skateboard, adopt at present slide gate nozzle to replace the combination flow control system of former traditional sleeve brick, stopper brick, nozzle brick both at home and abroad, the operation of steel pouring process is become simply, safety, reliable, flow control accurately, ladle turnover accelerates, the consumption of refractory materials that reduced refractory materials.
in slide gate nozzle system, slide plate is the parts of its most critical, and this is to be determined by its special working conditions.Specifically have: (1) needs to contact with high-temperature molten steel for a long time; (2) meeting under the condition of different casting process requirements, need repeatedly stand chemical erosion and the physical erosion of molten steel; (3) mechanical wear in the time of need bearing the violent thermal shocking of high-temperature molten steel and switching between slide plate etc.The slide unit that slide plate is controlled as molten steel flow in slide gate nozzle, after watering time use more, because the frequent friction of contact surface will inevitably bring that sled surface is pulled, fluffing and ligulate district adhere to the phenomenons such as molten steel, thereby increased the friction of slide plate slides, the damaged integrity of sled surface tight zone, has reduced degree of flexibility and the corrosion resistance thereof of slide plate slides.Meanwhile, the increase of slide plate contact surface friction will affect the degree of flexibility of its slip and the accuracy that molten steel flow is controlled.Sliding plate lubricant coating is exactly under this background that the requirement of slide plate is improved constantly, and takes the lead in by Japanese scholar's development and develops, and is applied to the product innovation of slide plate high temperature lubricating aspect.Sliding plate lubricant coating not only can reduce the frictional coefficient between slide plate, also can especially to the slide plate of aluminium carbonaceous, play the effect of oxidation protection to slide plate, thereby increases the work-ing life of slide plate.
at present, graphite composite powder is the main raw material of the sliding plate lubricant coating of domestic use, although graphite has 3000 ℃ of high fusing points (>) and good lubricity, but its maximum shortcoming is that high temperature oxidation resistance is poor, in air, when surpassing 400 ℃ of obvious oxidations of i.e. generation, temperature causes the sharply consumption of sled surface graphite lubrication coating.Along with China's iron and steel metallurgical industry is for slide plate, especially the slide plate performance requriements of large size specification constantly improves, increase slide plate and connect the important means that sliding number of times has become enterprise economic benefit, therefore to be main sliding plate lubricant coating can not meet Production requirement with the matching in slide plate work-ing life to the graphite of take gradually, finds and at high temperature can guarantee that large size specification slide plate connects the lubricant material of sliding number of times and becomes the task of top priority.
hexagonal boron nitride is to be the crystal by nitrogen-atoms and boron atomic building, and its structure has similar graphite laminate structure, presents the white powder of the proterties such as loose, lubricated, the easy moisture absorption, light weight, so claim again " white graphite ".Theoretical density is 2.27g/ cm
3
, Morse hardness is 2.Hexagonal boron nitride is to have good electrical insulating property, thermal conductivity, chemical stability, and without sharp melting point, in neutral reduction atmosphere, heat-resisting to 2000 ℃, in nitrogen and argon gas, use temperature can reach 2800 ℃, and in oxygen atmosphere, use temperature can reach 1000 ℃.When high temperature, also having good oilness, is a kind of good high temperature solid lubricant, and stable chemical nature is all had a unreactiveness to nearly all molten metal.Characteristic based on good anti-molten steel adhesion, erosion and high temperature lubricating of hexagonal boron nitride, is expected to become the new type high temperature sliding plate lubricant coating material that substitutes graphite.
Summary of the invention
the object of this invention is to provide a kind of hexagonal boron nitride-base sliding plate lubricant coating, oilness and high temperature oxidation resistance while increasing slide plate slides, use properties and the life-span of improving slide plate.
for achieving the above object, technical scheme provided by the present invention is: a kind of hexagonal boron nitride-base sliding plate lubricant coating, its component ratio is according to parts by weight meter, comprise following component: 20～50 parts, hexagonal boron nitride powder, 1～4 part of carbon black, 0.5～2 part of wilkinite, 2～5 parts of α-high temperature oxidation aluminium powders, 3～9 parts of silicon sol, 1～3 part of white glue with vinyl, 1～5 part of Xylo-Mucine, tween 0.1～0.5, ethylene glycol 0.5～1.5, sanitas 0.1～0.5, surplus is water.
further; described hexagonal boron nitride powder; granularity is 0.5～3.0 μ m; boron nitride content>=97%; it is the main component of and protection lubricated as sliding plate lubricant coating; there is good high temperature oxidation resistance, self-lubricating property and the nonwetting property to molten steel and slag, can effectively reduce the frictional coefficient between slide plate, prevent that molten steel and slag are to the infiltration of slide plate face.
further, described carbon black, preferably Shawinigan black, because it has nano level particle diameter, can have good filling effect to sliding plate lubricant coating coating, can be filled in the micropore of hexagonal boron nitride, makes sliding plate lubricant coating finer and close to the protection of slide plate.
further, described wilkinite, preferred sodium bentonite, mean particle size is 325 orders, has good swelling behavior in water, is the suspension stabilizer in agent.Sodium bentonite can form tridimensional network in water, hexagonal boron nitride particles can be suspended in agent steadily in the long term.
further, described α-high temperature oxidation aluminium powder is 1400 ℃ of above calcinings in air, the not borated aluminum oxide powder in surface, and mean particle size is 325 orders, there is high rigidity and polymolecularity, can improve sliding plate lubricant coating in the hardness of the slip coating of sled surface formation.
further, described silicon sol, pH value is 9～10, wherein dioxide-containing silica is 29～31wt.%, density 1.20～1.22g/cm
3
.Silicon sol, as high-temperature inorganic adhesive, can make slide plate slip coating and slide plate plate face at high temperature have certain bonding strength.
further, described white glue with vinyl, a kind of thermoplastic binder that made through polyreaction under initiator effect by Vinyl Acetate Monomer, there is the advantages such as fast drying, tack is good, bonding force is strong, can significantly increase the normal-temperature bonding performance of sliding plate lubricant coating and slide plate, and increase the performance that sliding plate lubricant coating coating has Deliquescence-resistant.
further, described Xylo-Mucine, is organic high molecular compound, and outward appearance is white powdered granule, has water-solublely, is thickening material and the low temperature bonding agent in agent.Xylo-Mucine is compared with other macromolecular compound, compatible with wilkinite in the situation that, has the significant advantage of thickening effectiveness, simultaneously, its cohesive strength is high, has good suspension, quick-drying and brushability, is therefore more suitable for as the low temperature bonding agent in sliding plate lubricant coating.
further, described ethylene glycol, for chemical pure or analytical pure organic reagent, can realize and dissolving each other with water, can significantly improve sprawling and levelling property of sliding plate lubricant coating.
further, described tween, preferably tween 80, outward appearance is light yellow thick liquid, be a kind of hydrophilic tensio-active agent, can effectively improve the wetting property of water to hexagonal boron nitride particles surface, be conducive to the good distribution of hexagonal boron nitride particles in water.
further, described sanitas, is the Sodium Benzoate of food additive grade, and effective inhibitor the growing of bacterium in depositing process guarantees the shelf life of agent.
further, described water, adopts common tap water, as the dispersion medium of various materials in sliding plate lubricant coating.
another technical scheme provided by the present invention is: a kind of preparation method who prepares above-mentioned hexagonal boron nitride-base sliding plate lubricant coating, comprises following processing step:
(1) silicon sol that weight percent is 3～9,1～3 white glue with vinyl, 1～5 Xylo-Mucine, 0.1～0.5 tween, 0.5～1.5 ethylene glycol and 0.1～0.5 sanitas and water join in homogenizer, carrying out wet mixing stirs 20～40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) the hexagonal boron nitride powder that is 20～50 by weight percent again, 1～4 carbon black, 0.5～2 wilkinite and α-high temperature oxidation aluminium powder of 2～5 join in the pre-mixing liquor of gained in step 1, the rotating speed turning with per minute 1000～3000 stirs, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains hexagonal boron nitride-base sliding plate lubricant coating.
use hexagonal boron nitride-base sliding plate lubricant coating of the present invention, if sled surface temperature is lower than 60 ℃, can adopt the mode of brushing, roller coat or spraying to construct, as sled surface temperature reaches more than 60 ℃, suggestion adopts spraying method construction.
after testing, the property indices of hexagonal boron nitride sliding plate lubricant coating of the present invention is as follows:
the thick fluid of outward appearance grey black
viscosity (s) 30～70 (No. 4 Cai's grace cup is measured)
pH value 7～10
density (g/ml) 1.05～1.45
by adopting technique scheme, tool of the present invention has the following advantages:
scientific formulation of the present invention is reasonable, and preparation method is simple, uses safety, and easy construction, has no side effect to human body, environmentally safe.Sliding plate lubricant coating of the present invention is coated in the slide plate of various materials, as aluminium carbonaceous, aluminium zirconium carbonaceous, magnesia, on the plate face of magnesium carbonaceous and zirconium matter slide plate, all can form densification, evenly, smooth lubricant coating, lower all in conjunction with firm at normal temperature and high temperature (>=800 ℃), incrust, from normal temperature to slide plate use temperature, all show good lubricity, antioxidant property due to hexagonal boron nitride lubricant coating is far superior to oildag coating simultaneously, number of times 3～4 times are slided in the company that can increase by comparison slide plate, embody higher cost performance.
Embodiment
below preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
embodiment mono-: a kind of hexagonal boron nitride-base sliding plate lubricant coating and component ratio thereof, according to parts by weight meter, comprise following component: 20 parts, hexagonal boron nitride powder, 4 parts of carbon blacks, 2 parts of wilkinites, 5 parts of α-high temperature oxidation aluminium powders, 9 parts of silicon sol, 3 parts of white glue with vinyl, 5 parts of Xylo-Mucines, tween 0.5, ethylene glycol 1.5, sanitas 0.5, water 49.5.
a preparation method for above-mentioned hexagonal boron nitride-base sliding plate lubricant coating, it comprises the following steps:
(1) silicon sol that weight percent is 9,3 white glue with vinyl, 5 Xylo-Mucine, 0.5 tween, 1.5 ethylene glycol and 0.5 sanitas and water join in homogenizer, carrying out wet mixing stirs 20～40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) the hexagonal boron nitride powder that is 20 by weight percent again, 4 carbon black, 2 wilkinite and α-high temperature oxidation aluminium powder of 5 join in the pre-mixing liquor of gained in step 1, the rotating speed turning with per minute 1000～3000 stirs, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains hexagonal boron nitride-base sliding plate lubricant coating.
embodiment bis-: a kind of hexagonal boron nitride-base sliding plate lubricant coating and component ratio thereof, according to parts by weight meter, comprise following component: 30 parts, hexagonal boron nitride powder, 3 parts of carbon blacks, 1.5 parts of wilkinites, 4 parts of α-high temperature oxidation aluminium powders, 7 parts of silicon sol, 2.5 parts of white glue with vinyl, 3 parts of Xylo-Mucines, tween 0.3, ethylene glycol 1, sanitas 0.3, water 47.5.
a preparation method for above-mentioned hexagonal boron nitride-base sliding plate lubricant coating, it comprises the following steps:
(1) silicon sol that weight percent is 7,2.5 white glue with vinyl, 3 Xylo-Mucine, 0.3 tween, 1 ethylene glycol and 0.3 sanitas and water join in homogenizer, carrying out wet mixing stirs 20～40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) the hexagonal boron nitride powder that is 30 by weight percent again, 3 carbon black, 1.5 wilkinite and α-high temperature oxidation aluminium powder of 4 join in the pre-mixing liquor of gained in step 1, the rotating speed turning with per minute 1000～3000 stirs, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains hexagonal boron nitride-base sliding plate lubricant coating.
embodiment tri-: a kind of hexagonal boron nitride-base sliding plate lubricant coating and component ratio thereof, according to parts by weight meter, comprise following component: 40 parts, hexagonal boron nitride powder, 2 parts of carbon blacks, 1 part of wilkinite, 3 parts of α-high temperature oxidation aluminium powders, 5 parts of silicon sol, 2 parts of white glue with vinyl, 2 parts of Xylo-Mucines, tween 0.2, ethylene glycol 0.7, sanitas 0.1, water 44.
a preparation method for above-mentioned hexagonal boron nitride-base sliding plate lubricant coating, it comprises the following steps:
(1) silicon sol that weight percent is 5,2 white glue with vinyl, 2 Xylo-Mucine, 0.2 tween, 0.7 ethylene glycol and 0.1 sanitas and water join in homogenizer, carrying out wet mixing stirs 20～40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) the hexagonal boron nitride powder that is 40 by weight percent again, 2 carbon black, 1 wilkinite and α-high temperature oxidation aluminium powder of 3 join in the pre-mixing liquor of gained in step 1, the rotating speed turning with per minute 1000～3000 stirs, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains hexagonal boron nitride-base sliding plate lubricant coating.
embodiment tetra-: a kind of hexagonal boron nitride-base sliding plate lubricant coating and component ratio thereof, according to parts by weight meter, comprise following component: 50 parts, hexagonal boron nitride powder, 1 part of carbon black, 0.5 part of wilkinite, 2 parts of α-high temperature oxidation aluminium powders, 3 parts of silicon sol, 1 part of white glue with vinyl, 1 part of Xylo-Mucine, tween 0.1, ethylene glycol 0.5, sanitas 0.1, water 40.8.
a preparation method for above-mentioned hexagonal boron nitride-base sliding plate lubricant coating, it comprises the following steps:
(1) silicon sol that weight percent is 3,1 white glue with vinyl, 1 Xylo-Mucine, 0.1 tween, 0.5 ethylene glycol and 0.1 sanitas and water join in homogenizer, carrying out wet mixing stirs 20～40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) the hexagonal boron nitride powder that is 50 by weight percent again, 1 carbon black, 0.5 wilkinite and α-high temperature oxidation aluminium powder of 2 join in the pre-mixing liquor of gained in step 1, the rotating speed turning with per minute 1000～3000 stirs, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains hexagonal boron nitride-base sliding plate lubricant coating.
above embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art understand content of the present invention and implemented; can not limit the scope of the invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (9)
1. a hexagonal boron nitride-base sliding plate lubricant coating, it is characterized in that: its component ratio, according to parts by weight meter, comprises following component: 20～50 parts, hexagonal boron nitride powder, 1～4 part of carbon black, 0.5～2 part of wilkinite, 2～5 parts of α-high temperature oxidation aluminium powders, 3～9 parts of silicon sol, 1～3 part of white glue with vinyl, 1～5 part of Xylo-Mucine, tween 0.1～0.5, ethylene glycol 0.5～1.5, sanitas 0.1～0.5, water surplus.
2. slide gate nozzle slide plate protective cover in steel-making continuous casting equipment according to claim 1, it is characterized in that: described hexagonal boron nitride Powder Particle Size is 0.5-3.0 μ m, and in described hexagonal boron nitride powder, hexagonal boron nitride content is more than or equal to 97%.
3. hexagonal boron nitride-base sliding plate lubricant coating according to claim 1, is characterized in that: described carbon black is Shawinigan black.
4. hexagonal boron nitride-base sliding plate lubricant coating according to claim 1, is characterized in that: described wilkinite is sodium bentonite, and mean particle size is 325 orders.
5. hexagonal boron nitride-base sliding plate lubricant coating according to claim 1, is characterized in that: described α-high temperature oxidation aluminium powder is 1400 ℃ of above calcinings in air, and mean particle size is 325 orders.
6. hexagonal boron nitride-base sliding plate lubricant coating according to claim 1, is characterized in that: described silicon sol pH value is 9～10, and in described silicon sol, dioxide-containing silica is 29～31wt.%, density 1.20～1.22g/cm
3.
7. hexagonal boron nitride-base sliding plate lubricant coating according to claim 1, is characterized in that: described tween is tween 80.
8. hexagonal boron nitride-base sliding plate lubricant coating according to claim 1, is characterized in that: the Sodium Benzoate that described sanitas is food additive grade.
9. a preparation method who prepares the hexagonal boron nitride-base sliding plate lubricant coating described in any one in claim 1～8, it comprises the following steps:
(1) silicon sol that weight percent is 3～9,1～3 white glue with vinyl, 1～5 Xylo-Mucine, 0.1～0.5 tween, 0.5～1.5 ethylene glycol and 0.1～0.5 sanitas and water join in homogenizer, carrying out wet mixing stirs 20～40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) the hexagonal boron nitride powder that is 20～50 by weight percent again, 1～4 carbon black, 0.5～2 wilkinite and α-high temperature oxidation aluminium powder of 2～5 join in the pre-mixing liquor of gained in step 1, the rotating speed turning with per minute 1000～3000 stirs, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains hexagonal boron nitride-base sliding plate lubricant coating.
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| CN104479473A (en) * | 2015-01-14 | 2015-04-01 | 佟永良 | Sepiolite-based high-temperature sliding plate lubricating coating and preparation method thereof |
| CN105886074A (en) * | 2016-04-18 | 2016-08-24 | 上海在邦化工有限公司 | Molybdenum disulfide lubricating spray and preparation method thereof |
| CN107955422A (en) * | 2017-10-24 | 2018-04-24 | 江苏金仕达汽配科技有限公司 | A kind of water-based high-temperature oxidation resistant boron nitride lubrication protection coating and preparation method thereof |
| CN109021628A (en) * | 2018-07-12 | 2018-12-18 | 商丘师范学院 | It is a kind of can low temperature bonding applied at elevated temperature aqueous boron nitride coating |
| CN112481012A (en) * | 2020-12-08 | 2021-03-12 | 江苏南洋中京科技有限公司 | Cooling lubricating liquid for hot forging and application thereof |
| CN113278333A (en) * | 2021-05-31 | 2021-08-20 | 东风商用车有限公司 | Self-lubricating film material and preparation method thereof |
| CN114196459A (en) * | 2021-12-21 | 2022-03-18 | 中国科学院兰州化学物理研究所 | Dry film lubricant, preparation method and application thereof |
| CN112521004B (en) * | 2020-03-20 | 2022-08-19 | 山东晶亿新材料有限公司 | Glass release agent and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479473A (en) * | 2015-01-14 | 2015-04-01 | 佟永良 | Sepiolite-based high-temperature sliding plate lubricating coating and preparation method thereof |
| CN105886074A (en) * | 2016-04-18 | 2016-08-24 | 上海在邦化工有限公司 | Molybdenum disulfide lubricating spray and preparation method thereof |
| CN105886074B (en) * | 2016-04-18 | 2019-06-25 | 在邦润滑材料（上海）有限公司 | Molybdenum disulfide lubricates spray and preparation method thereof |
| CN107955422A (en) * | 2017-10-24 | 2018-04-24 | 江苏金仕达汽配科技有限公司 | A kind of water-based high-temperature oxidation resistant boron nitride lubrication protection coating and preparation method thereof |
| CN109021628A (en) * | 2018-07-12 | 2018-12-18 | 商丘师范学院 | It is a kind of can low temperature bonding applied at elevated temperature aqueous boron nitride coating |
| CN112521004B (en) * | 2020-03-20 | 2022-08-19 | 山东晶亿新材料有限公司 | Glass release agent and preparation method thereof |
| CN112481012A (en) * | 2020-12-08 | 2021-03-12 | 江苏南洋中京科技有限公司 | Cooling lubricating liquid for hot forging and application thereof |
| CN113278333A (en) * | 2021-05-31 | 2021-08-20 | 东风商用车有限公司 | Self-lubricating film material and preparation method thereof |
| CN114196459A (en) * | 2021-12-21 | 2022-03-18 | 中国科学院兰州化学物理研究所 | Dry film lubricant, preparation method and application thereof |
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Effective date of registration: 20161114 Address after: Jiangyan District of Jiangsu city in Taizhou province 225500 Luo Tong Street West South Central No. 999 (high-tech business center, Jiangyan District) Patentee after: Taizhou new Mstar Technology Ltd Address before: 215634 building 413, building A, emerging industry incubation center, Zhangjiagang Free Trade Zone, Suzhou, Jiangsu Patentee before: Zhangjiagang Tuopu New Material Technology Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20180808 |