CN103509641B - 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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- CN103509641B CN103509641B CN201310342434.5A CN201310342434A CN103509641B CN 103509641 B CN103509641 B CN 103509641B CN 201310342434 A CN201310342434 A CN 201310342434A CN 103509641 B CN103509641 B CN 103509641B
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Abstract
<b> the invention discloses a kind of Hexagonal boron nitride base slide plate lubricant and preparation method thereof.A kind of Hexagonal boron nitride base slide plate lubricant, a kind of Hexagonal boron nitride base slide plate lubricant, its component ratio is according to weight parts, comprise following component: 20 ~ 50 parts, hexagonal boron nitride powder, carbon black 1 ~ 4 part, wilkinite 0.5 ~ 2 part, α-high temperature oxidation aluminium powder 2 ~ 5 parts, silicon sol 3 ~ 9 parts, white glue with vinyl 1 ~ 3 part, Xylo-Mucine 1 ~ 5 part, tween 0.1 ~ 0.5, ethylene glycol 0.5 ~ 1.5, sanitas 0.1 ~ 0.5, surplus is water.Prepare a preparation method for above-mentioned Hexagonal boron nitride base slide plate lubricant, comprise following processing step: (1) silicon sol, white glue with vinyl, Xylo-Mucine, tween, ethylene glycol and sanitas and water join in homogenizer, obtain pre-mixing liquor; (2) will add in pre-mixing liquor for hexagonal boron nitride powder, carbon black, wilkinite and α-high temperature oxidation aluminium powder again, stir, obtain Hexagonal boron nitride base slide plate lubricant.</b>
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 improving sled surface lubrication and high-temperature oxidation resistance, 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, slide gate nozzle is adopted to instead of the combination flow control system of former traditional sleeve brick, stopper brick, nozzle brick at present both at home and abroad, the operation of steel pouring process is become simply, safety, reliable, flow control accurately, ladle turnover accelerates, and reduces the refractory materials consumption of refractory materials.
in slide gate nozzle system, slide plate is the parts of its most critical, and this is determined by its special working conditions.Specifically have: (1) needs to contact with high-temperature molten steel for a long time; (2) under the condition of satisfied different casting process requirement, chemical erosion and the physical erosion of molten steel need repeatedly be stood; (3) mechanical wear etc. when need bear the violent thermal shocking of high-temperature molten steel and opening and closing between slide plate.The slide unit that slide plate controls as molten steel flow in slide gate nozzle, after watering time use more, because the frequent friction of contact surface will inevitably bring sled surface to pull, to fluff and ligulate district adheres to the phenomenon such as molten steel, thus increase the friction of slide plate slides, the damaged integrity of sled surface tight zone, reduces degree of flexibility and the corrosion resistance thereof of slide plate slides.Meanwhile, the increase of slide plate contact surface friction will affect the accuracy of its degree of flexibility of sliding and molten steel flow control.Sliding plate lubricant coating is exactly under this background improved constantly the requirement of slide plate, take the lead in by Japan scholar's Study and Development out, be 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 to slide plate, especially can play the effect of oxidation protection to the slide plate of Al_2O_3-C based, thus 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 high fusing point (>3000 DEG C) and excellent lubricity, but its maximum shortcoming is that high temperature oxidation resistance is poor, namely there is significantly oxidation when temperature more than 400 DEG C in atmosphere and cause 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, the matching in the sliding plate lubricant coating therefore based on graphite and slide plate work-ing life can not meet Production requirement gradually, finds and at high temperature can ensure that the lubricant material that large size specification slide plate connects sliding number of times becomes the task of top priority.
hexagonal boron nitride is be crystal by nitrogen-atoms and boron atomic building, and its structure has similar graphite laminate structure, presents loose, lubrication, the easily proterties such as the moisture absorption, light weight white powder, so also known as " white graphite ".Theoretical density is 2.27g/cm
3
, Morse hardness is 2.Hexagonal boron nitride has good electrical insulating property, thermal conductivity, chemical stability, and without sharp melting point, in neutral reduction atmosphere, heat-resisting to 2000 DEG C, in nitrogen and argon gas, use temperature can reach 2800 DEG C, and in oxygen atmosphere, use temperature can reach 1000 DEG C.Also having good oilness when high temperature, is a kind of excellent high temperature solid lubricant, stable chemical nature, all has a unreactiveness to nearly all molten metal.Based on the excellent anti-molten steel adhesion of hexagonal boron nitride, corrode and the characteristic of high temperature lubricating, be expected to the new type high temperature sliding plate lubricant coating material becoming alternative graphite.
Summary of the invention
the object of this invention is to provide a kind of Hexagonal boron nitride base slide plate lubricant, oilness during increase slide plate slides and high temperature oxidation resistance, improve use properties and the life-span of slide plate.
for achieving the above object, technical scheme provided by the present invention is: a kind of Hexagonal boron nitride base slide plate lubricant, its component ratio is according to weight parts, comprise following component: 20 ~ 50 parts, hexagonal boron nitride powder, carbon black 1 ~ 4 part, wilkinite 0.5 ~ 2 part, α-high temperature oxidation aluminium powder 2 ~ 5 parts, silicon sol 3 ~ 9 parts, white glue with vinyl 1 ~ 3 part, Xylo-Mucine 1 ~ 5 part, 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 μm; boron nitride content>=97%; it is the main component as sliding plate lubricant coating lubrication and protection; there is excellent high temperature oxidation resistance, self-lubricating property and the nonwetting property to molten steel and slag, effectively can reduce the frictional coefficient between slide plate, prevent molten steel and slag to the infiltration in slide plate face.
further, described carbon black, preferred Shawinigan black, because it has nano level particle diameter, can have excellent filling effect to sliding plate lubricant coating coating, can be filled in the micropore of hexagonal boron nitride, makes the protection of sliding plate lubricant coating to slide plate finer and close.
further, described wilkinite, preferred sodium bentonite, mean particle size is 325 orders, has excellent 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 more than 1400 DEG C calcinings in air, the not borated aluminum oxide powder in surface, and mean particle size is 325 orders, there is high rigidity and polymolecularity, the hardness of the slip coating that sliding plate lubricant coating is formed in sled surface can be improved.
further, described silicon sol, pH value is 9 ~ 10, and 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, by Vinyl Acetate Monomer a kind of thermoplastic binder obtained through polyreaction under initiator effect, there is the advantages such as fast drying, tack is good, bonding force is strong, significantly can 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 powder particle, has water-soluble, is the thickening material in agent and low temperature bonding agent.Xylo-Mucine, compared with other macromolecular compound, when compatible with wilkinite, 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, is chemical pure or analytical pure organic reagent, can realizes dissolving each other with water, can significantly improve sprawling and levelling property of sliding plate lubricant coating.
further, described tween, preferred tween 80, outward appearance is pale yellow viscous liquid, be a kind of hydrophilic tensio-active agent, effectively can 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, effectively can deposit growing of bacterium in process by inhibitor, ensure the shelf life of agent.
further, described water, adopts common tap water, as the dispersion medium of material various in sliding plate lubricant coating.
another technical scheme provided by the present invention is: a kind of preparation method preparing above-mentioned Hexagonal boron nitride base slide plate lubricant, comprises following processing step:
(1) weight percent be 3 ~ 9 silicon sol, 1 ~ 3 white glue with vinyl, 1 ~ 5 Xylo-Mucine, the tween of 0.1 ~ 0.5, the ethylene glycol of 0.5 ~ 1.5 and 0.1 ~ 0.5 sanitas and water join in homogenizer, carry out wet mixing to stir 20 ~ 40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) by weight percent be again 20 ~ 50 hexagonal boron nitride powder, the carbon black of 1 ~ 4, the wilkinite of 0.5 ~ 2 and 2 ~ 5 α-high temperature oxidation aluminium powder join in the pre-mixing liquor of gained in step 1, stir with the rotating speed of per minute 1000 ~ 3000 turns, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains Hexagonal boron nitride base slide plate lubricant.
use Hexagonal boron nitride base slide plate lubricant of the present invention, if sled surface temperature is lower than 60 DEG C, can adopt brushing, the mode of roller coat or spraying constructs, as sled surface temperature reaches more than 60 DEG C, then 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 cups measure)
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, use safety, easy construction, to human non-toxic's side effect, and environmentally safe.Sliding plate lubricant coating of the present invention is coated in the slide plate of various material, as aluminium carbonaceous, aluminium zirconium carbonaceous, magnesia, on the plate face of magnesium carbonaceous and zirconium matter slide plate, all densification can be formed, evenly, smooth lubricant coating, all combine firmly under normal temperature and high temperature (>=800 DEG C), incrust, good lubricity is all shown from normal temperature to slide plate use temperature, simultaneously because the antioxidant property of hexagonal boron nitride lubricant coating is far superior to oildag coating, number of times 3 ~ 4 times are slided in the company that can add slide plate by comparison, embody higher cost performance.
Embodiment
below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
embodiment one: a kind of Hexagonal boron nitride base slide plate lubricant and component ratio thereof, according to weight parts, comprise following component: 20 parts, hexagonal boron nitride powder, carbon black 4 parts, wilkinite 2 parts, α-high temperature oxidation aluminium powder 5 parts, silicon sol 9 parts, white glue with vinyl 3 parts, Xylo-Mucine 5 parts, tween 0.5, ethylene glycol 1.5, sanitas 0.5, water 49.5.
prepare a preparation method for above-mentioned Hexagonal boron nitride base slide plate lubricant, it comprises the following steps:
(1) weight percent be 9 silicon sol, 3 white glue with vinyl, 5 Xylo-Mucine, the tween of 0.5, the ethylene glycol of 1.5 and 0.5 sanitas and water join in homogenizer, carry out wet mixing to stir 20 ~ 40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) by weight percent be again 20 hexagonal boron nitride powder, the carbon black of 4, the wilkinite of 2 and 5 α-high temperature oxidation aluminium powder join in the pre-mixing liquor of gained in step 1, stir with the rotating speed of per minute 1000 ~ 3000 turns, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains Hexagonal boron nitride base slide plate lubricant.
embodiment two: a kind of Hexagonal boron nitride base slide plate lubricant and component ratio thereof, according to weight parts, comprise following component: 30 parts, hexagonal boron nitride powder, carbon black 3 parts, wilkinite 1.5 parts, α-high temperature oxidation aluminium powder 4 parts, silicon sol 7 parts, white glue with vinyl 2.5 parts, Xylo-Mucine 3 parts, tween 0.3, ethylene glycol 1, sanitas 0.3, water 47.5.
prepare a preparation method for above-mentioned Hexagonal boron nitride base slide plate lubricant, it comprises the following steps:
(1) weight percent be 7 silicon sol, 2.5 white glue with vinyl, 3 Xylo-Mucine, the tween of 0.3, the ethylene glycol of 1 and 0.3 sanitas and water join in homogenizer, carry out wet mixing to stir 20 ~ 40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) by weight percent be again 30 hexagonal boron nitride powder, the carbon black of 3, the wilkinite of 1.5 and 4 α-high temperature oxidation aluminium powder join in the pre-mixing liquor of gained in step 1, stir with the rotating speed of per minute 1000 ~ 3000 turns, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains Hexagonal boron nitride base slide plate lubricant.
embodiment three: a kind of Hexagonal boron nitride base slide plate lubricant and component ratio thereof, according to weight parts, comprise following component: 40 parts, hexagonal boron nitride powder, carbon black 2 parts, wilkinite 1 part, α-high temperature oxidation aluminium powder 3 parts, silicon sol 5 parts, white glue with vinyl 2 parts, Xylo-Mucine 2 parts, tween 0.2, ethylene glycol 0.7, sanitas 0.1, water 44.
prepare a preparation method for above-mentioned Hexagonal boron nitride base slide plate lubricant, it comprises the following steps:
(1) weight percent be 5 silicon sol, 2 white glue with vinyl, 2 Xylo-Mucine, the tween of 0.2, the ethylene glycol of 0.7 and 0.1 sanitas and water join in homogenizer, carry out wet mixing to stir 20 ~ 40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) by weight percent be again 40 hexagonal boron nitride powder, the carbon black of 2, the wilkinite of 1 and 3 α-high temperature oxidation aluminium powder join in the pre-mixing liquor of gained in step 1, stir with the rotating speed of per minute 1000 ~ 3000 turns, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains Hexagonal boron nitride base slide plate lubricant.
embodiment four: a kind of Hexagonal boron nitride base slide plate lubricant and component ratio thereof, according to weight parts, comprise following component: 50 parts, hexagonal boron nitride powder, carbon black 1 part, wilkinite 0.5 part, α-high temperature oxidation aluminium powder 2 parts, silicon sol 3 parts, white glue with vinyl 1 part, Xylo-Mucine 1 part, tween 0.1, ethylene glycol 0.5, sanitas 0.1, water 40.8.
prepare a preparation method for above-mentioned Hexagonal boron nitride base slide plate lubricant, it comprises the following steps:
(1) weight percent be 3 silicon sol, 1 white glue with vinyl, 1 Xylo-Mucine, the tween of 0.1, the ethylene glycol of 0.5 and 0.1 sanitas and water join in homogenizer, carry out wet mixing to stir 20 ~ 40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) by weight percent be again 50 hexagonal boron nitride powder, the carbon black of 1, the wilkinite of 0.5 and 2 α-high temperature oxidation aluminium powder join in the pre-mixing liquor of gained in step 1, stir with the rotating speed of per minute 1000 ~ 3000 turns, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains Hexagonal boron nitride base slide plate lubricant.
above embodiment is only for illustrating 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 to be implemented; can not limit the scope of the invention with this; all equivalences done according to spirit of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (1)
1. a Hexagonal boron nitride base slide plate lubricant, it is characterized in that: its component, according to weight percent number meter, comprises following component: hexagonal boron nitride powder 20% ~ 50%, carbon black 1% ~ 4%, wilkinite 0.5% ~ 2%, α-high temperature oxidation aluminium powder 2% ~ 5%, silicon sol 3% ~ 9%, white glue with vinyl 1% ~ 3%, Xylo-Mucine 1% ~ 5%, tween 0.1% ~ 0.5%, ethylene glycol 0.5% ~ 1.5%, sanitas 0.1% ~ 0.5%, water surplus; Described hexagonal boron nitride Powder Particle Size is 0.5-3.0 μm, and in described hexagonal boron nitride powder, hexagonal boron nitride content is more than or equal to 97%; Described carbon black is Shawinigan black; Described wilkinite is sodium bentonite, and mean particle size is 325 orders; Described α-high temperature oxidation aluminium powder is more than 1400 DEG C calcinings in air, and mean particle size is 325 orders; 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; Described tween is tween 80; Described sanitas is the Sodium Benzoate of food additive grade;
The preparation method of described Hexagonal boron nitride base slide plate lubricant, it comprises the following steps:
(1) weight percent be 3% ~ 9% silicon sol, 1% ~ 3% white glue with vinyl, 1% ~ 5% Xylo-Mucine, the tween of 0.1% ~ 0.5%, the ethylene glycol of 0.5% ~ 1.5% and 0.1% ~ 0.5% sanitas and water join in homogenizer, carry out wet mixing to stir 20 ~ 40 minutes, added material is dissolved in water fully, obtains pre-mixing liquor;
(2) by weight percent be again 20% ~ 50% hexagonal boron nitride powder, the carbon black of 1% ~ 4%, the wilkinite of 0.5% ~ 2% and 2% ~ 5% α-high temperature oxidation aluminium powder join in the pre-mixing liquor of gained in step 1, stir with the rotating speed of per minute 1000 ~ 3000 turns, stir more than 2 hours, material is dispersed in pre-mixing liquor fully, obtains Hexagonal boron nitride base slide plate lubricant.
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| 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 |
| CN109021628B (en) * | 2018-07-12 | 2020-09-04 | 商丘师范学院 | Water-based boron nitride coating capable of being bonded at low temperature and used at high temperature |
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