CN102352275A - Composition for treating friction pair and preparation method thereof - Google Patents
Composition for treating friction pair and preparation method thereof Download PDFInfo
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- CN102352275A CN102352275A CN201110264954XA CN201110264954A CN102352275A CN 102352275 A CN102352275 A CN 102352275A CN 201110264954X A CN201110264954X A CN 201110264954XA CN 201110264954 A CN201110264954 A CN 201110264954A CN 102352275 A CN102352275 A CN 102352275A
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Abstract
The invention relates to a composition for treating a friction pair and a preparation method thereof. The composition consists of the following components in percentage by weight: 36-76 percent of aluminum silicate ore nano-powder, 28-58 percent of hydroxyl magnesium silicate nano-powder, 6-8 percent of boric acid or borate and 1-5 percent of dispersing agent. The composition is added into lubricating oil or lubricating grease by 0.1-5 percent by weight, and is uniformly mixed for use. The composition can be used for effectively clearing friction sediments on the surface of the friction pair and in a wear concave surface, so that the metal surfaces of the friction pair are clean and naked; and a self-repairing protective ceramic layer with high hardness and an ultralow friction coefficient is formed on the surface of the friction pair for repairing the surface friction of the friction pair, so that direct contact between the metal surfaces of the friction pair is effectively reduced, the friction coefficient is lowered, and the service life of the friction pair is prolonged. The composition has the advantages of strong dispersing action, capability of well suspending in the lubricating oil, no precipitation when standing for a long time, no reaction with the lubricating oil, no change of the viscosity of the lubricating oil, and the like.
Description
Technical field
The present invention relates to a kind of composition and method of making the same that friction pair is handled that is used for, said composition can be used for the processing of friction element in the machinofacture process, and the wear control that also can in the mechanical movement process, be used for friction element is repaired with exempting to dismantle.
Background technology
Friction is the phenomenon that generally takes place in the mechanical means operation process, and friction pair surface at work weares and teares, and when wearing and tearing developed into to a certain degree, friction pair can lose efficacy because of wearing and tearing, just need change or repair just to make the equipment works better.Friction has also consumed extra energy, has reduced mechanical efficiency.Frictional wear is one of three big reasons that cause material, structure deteriorate and inefficacy, has also consumed the energy of whole world 30-50% simultaneously.Therefore reducing wear, cut down the consumption of energy, improve equipment duration of service and utilization ratio, is one of problem of countries in the world primary study.
The most frequently used and the simple effective method of the secondary wearing and tearing of reducing friction is to adopt lubricant to be lubricated; Lubricating oil or railway grease are the lubricants that generally adopts at present; Because most of lubricating oil or railway grease are between friction pair, to produce the thin oil-bound film of one deck, reduce frictional coefficient and wearing and tearing, but this layer oil film are destroyed easily in use; And apt to deteriorate and lost efficacy, be easy to generate settling, so lubricant effect is difficult to satisfy the requirement of many application scenarios.In order to remedy the defective of lubricating oil, in be everlasting lubricating oil or railway grease, add various organism or inorganics to strengthen the lubricity of lubricating grease, improve the supporting capacity of lubricant film and reduce frictional coefficient.Wherein solid lubrication additive is domestic and international one of research and development trend in recent years.
The MgO by (quality %) is provided, CaO 20-60, SiO in No. 2006707 patent of RU
2, Al
2O
320-60, H
2The abrasive flour of mineral substance such as the natural serpentine preparation that the rock mixture of O 3-10 and 3-10 is formed.No. 1377284 patent of RU provides by the antiwear additive of natural agalmatolite as railway grease.Above-mentioned two patents prove that in practice its effect is undesirable, even have caused opposite result.Used serpentine in No. 2035636 patents of RU, talcum, sulphur, magnetite, the mixture of enstatite and fayalite.Use 110-115 ℃ of peak dry saturated steam treating mixt before use, so that dehydration and stablize its dispersity.This method can reduce frictional coefficient, stablizes the powder dispersity.But in description of the invention, do not see relevant dispersity, the specifying of frictional coefficient and other data.
In the CN00801330.6 patent with comprising from MgO, SiO
2, Al
2O
3, CaO, Fe
2O
3, K
2O, Na
2The dewatered product of the hydrate of O series oxide compound.Above-mentioned oxide compound derives from kaolinite, monothermite, agalmatolite, white mica, illite, glaukonine, vermiculite, serpentine, Pi Teao stone talcum, tincal, asbestos, cohesion stone, bauxite and kaolin.But all do not provide the percentage composition scope of compsn in claims and the specification sheets, so can't prepare this compsn that is used for.A kind of solid lubrication combination agent that friction pair is handled that is used for is provided in the CN02120826.3 patent, has comprised wilkinite 40-70%, chlorite 10-30%, rhombspar 5-20%, magnesite 0-10%, catalyzer 0.1-0.5%.But the granularity general requirement d of said composition
97＜10 μ m, this granulometric range are not easy to be suspended in the lubricating oil and are precipitated out, and cause oil circuit to stop up.In No. 200510041221.4 patents of ZL a kind of agent for repairing abrasion resistance of metal is provided, has formed by silicon oxide, aluminum oxide, Natural manganese dioxide, red stone, sodium oxide, nickel oxide, chromic oxide, phosphorus oxide, quicklime.This composition is with having used sodium oxide and phosphorus oxide compound; Wherein sodium oxide has extremely strong corrodibility and strong impulse property; Must under anhydrous state, carry out in the whole process of production; Otherwise be easy to occur violent chemical reaction and crisis to producers, and in use have such danger equally; Also undeclared for phosphorus oxide in the patent is titanium dioxide phosphorus or five phosphorus oxide; Therefore can't prepare; Five phosphorus oxide still are severe corrosive and strong and stimulating composition, meet a large amount of heat of water generates and produce phosphoric acid, meet sodium oxide and vigorous reaction can take place and produce big calorimetric; Its operation is extremely dangerous, so above-mentioned compsn can't be prepared.
Summary of the invention
The purpose of this invention is to provide a kind of compsn that friction pair is handled that is used for, form by aluminosilicate-type ore nano powder, hydroxyl magnesium silicate class ore nano powder, boric acid or borate, dispersion agent.Said composition can be removed the friction settling in surface of friction pair and the wearing and tearing concave surface effectively; Make friction pair metallic surface cleaning and exposed; Composition components reacts with the surface of friction pair metal under the effect of frictional energy, produces the selfreparing protection ceramic layer of high firmness, ultra-low friction coefficient, until the wearing and tearing of repairing surface of friction pair fully; Reduced the direct contact between the friction pair metallic surface effectively, the work-ing life of improving friction pair greatly.Said composition has very strong dissemination simultaneously, can be suspended in well in the lubricating oil, and long-time placement does not precipitate, and with the lubricating oil reaction, does not change advantages such as oil body.
Technical scheme of the present invention is: a kind of compsn that is used for the friction pair processing is characterized in that being made up of the weight percent of following each component:
Aluminosilicate-type ore nano powder: 36-76%
Hydroxyl magnesium silicate class ore nano powder: 28-58%
Boric acid or borate: 6-8%
Dispersion agent: 1-5%
Aluminosilicate-type ore of the present invention is selected from ore or the compound that natural and synthetic contain the pure aluminium silicate composition, includes but not limited to kaolinite, wilkinite, smectite; Zeolite, agalmatolite, Red Halloysite, illite; Dickite, attapulgite, sillmanite, monothermite; Halloysite, meal wheat stone, chlorite is in the feldspar.Select wherein one or more mixture for use.
Hydroxyl magnesium silicate class ore of the present invention is selected from ore or the compound that natural and synthetic contain the hydroxyl magnesium silicate composition, includes but not limited to serpentine, talcum, sepiolite, nacrite, humite, forsterite, Tremoliteor Tremoliteasbestos, diopside.Select wherein one or more mixture for use.
Boric acid of the present invention or borate ore are selected from ore or the compound that natural and synthetic contain the borate composition, include but not limited to boric acid, borax, szaibelyite, ulexite, colemanite, howlite, ludwigite, suanite.Select wherein one or more mixture for use.
Dispersion agent of the present invention includes but not limited to caproic acid, sad, capric acid, LAURIC ACID 99 MIN, tetradecanoic acid, palmitinic acid, Triple Pressed Stearic Acid, eicosanoic acid, mountain Yu acid, oleic acid, linolic acid, butyl(tetra)titanate, silane coupling agent.Select wherein one or more mixture for use.
The preparation of compositions method that is used for the friction pair processing of the present invention may further comprise the steps: 1) pulverize and ore dressing: get aluminosilicate-type ore, hydroxyl magnesium silicate class ore, boric acid and borate ore; Carry out fragmentation respectively; Ore dressing; Useless mineral or toxic mineral are separated, and the ore powder with separation and purification is broken into the powder about granularity 1mm then.2) dehydration: the powder of getting aluminosilicate-type ore, hydroxyl magnesium silicate class ore, boric acid class ore respectively is at 100 ℃-1000 ℃ scope internal heating dehydration, preparation dehydration mineral dust.3) nano-pulverization: take by weighing dehydration aluminosilicate-type mineral dust, Anhydrohydroxy magnesium silicate type mineral dust, dehydration borate mineral dust respectively; Dispersion agent mixes, and puts that attrition process becomes nanometer powder in the kibbler; Granularity requires promptly to get compsn of the present invention less than 1000nm.4) disperse: as oil dope, is that the ratio of 0.1-5% join in lubricating oil in mass percent with above-mentioned compsn, fully stirs or ultra-sonic dispersion, obtains containing the lubricating oil of the present composition.
Further; Ore dressing described in the step 1) separates valuable mineral and gangue mineral for adopting the method with biology physics, chemistry, and various symbiotic valuable minerals is separated from each other as far as possible; Remove or reduce detrimental impurity; To obtain the technology of high purity valuable mineral, beneficiation method comprises physical method, chemical process and biological method.Preferred physical method and chemical process, more preferably physical method.
Further, the dehydration described in the step 2 is to adopt the method for heating to slough the crystal water in the mineral dust; Physico-chemical property difference because of ore; Therefore, the dehydration temperaturre that is adopted is also different, and wherein dehydration temperaturre in the part mineral dehydration technology and scaling loss amount are seen table 1.
The dehydration temperaturre of part mineral dust in table 1 compsn
Further, step 2) can select thermal dehydration under the atmospheric pressure state in the dehydration, or adopt thermal dehydration under the vacuum state.
Further, step 2) dewatering time is 1-24 hour, and preferred 2～16 hours, more excellent was 3～12 hours, and optimum is 4-8 hour.
Further, the described lubricating oil of step 4) comprises solid oil and lubricating oil.
Specific embodiment
Below will combine embodiment to specify the present invention, embodiments of the invention only are used to technical scheme of the present invention is described, and non-limiting essence of the present invention.
Embodiment 1
1. the preparation of the present composition
Take by weighing kaolin raw ore 1000g, pulverize, sieve, add water slurrying then, the kaolin mud that is suspended in the water is chosen in gradation, filters, and oven dry gets the kaolin fine powder.
Take by weighing serpentine ore 500g, non-mineral matter is removed in fragmentation, is ground into fine powder then, promptly gets.
Take by weighing borax 100g, pulverize, add 10 ℃ of cold water of 100ml, soaked 1 hour, stir constantly, filter, repeatable operation twice filters, and removes filtrating, adds 200ml water then, is heated to and boils, and filters, and places, and separates out crystallization, filters, and gets crystallization, and oven dry promptly gets.
Take by weighing the kaolin powder respectively, put and be heated to 600-700 ℃ in the retort furnace, calcined 5 hours, take out, put, promptly get the dehydrated kaolin powder to room temperature.Get the serpentine powder, put and be heated to 600-650 ℃ in the retort furnace, calcined 4 hours, take out, put, promptly get the serpentine powder that dewaters to room temperature.Get the borax crystallization, put and be heated to 400-450 ℃ in the retort furnace, calcined 3 hours, take out, promptly get the Borax pentahydrate powder.
Take by weighing the kaolin 600g after the dehydration respectively, serpentine powder 330g, borax 60g, oleic acid 10g puts into high energy ball mill and is ground to particle diameter≤1000nm, takes out, and promptly gets compsn of the present invention.
2. the preparation of antifriction lubricant
Take by weighing above-mentioned compsn 1.0g, join among the 10W-40 finished lube 1000ml, mix.
3. experimental result
On vertical omnipotent friction wear testing machine, carry out friction-wear test, last sample be No. 45 just, following sample is grey cast steel (HT200), control group is established in test, control sample is not for adding the 10W-40 finished lube of compsn.After 120 hours test, the quality change of the microhardness of sample wear surface and following sample under measuring, the result sees table 2
Table 2 time sample wear surface microhardness, roughness and quality change
The result shows: the lubricating oil that adds the present composition is used for the friction pair that No. 45 steel and grey cast steel (HT200) are formed; Compare with the finished lube that does not add the present composition; The friction surface microhardness of following sample has increased by 3.11 times; Wearing and tearing reduce 89.1%, and surfaceness obtains very big improvement, and is as bright as a sixpence.
Embodiment 2
1. the preparation of the present composition
Take by weighing wilkinite raw ore 1000g, fragmentation adds 5 times of water gagings; Stir 20min, make it to be dispersed into subparticle, filter with 60 mesh sieves; The filtration of wilkinite medium coarse sand is removed, encourage bentonite slurry then and put ultrasonic 30min in the ultrasonic cleaning machine, filter with 200 mesh sieves; Get the filtrating oven dry, promptly get the wilkinite fine powder.
Get talcum ore 500g, be ground into micropowders with kibbler, particle diameter is 10-25 μ; Add the water suspendible of 5 times of amounts, obtain the upper strata suspension by elutriation, filter, oven dry promptly gets.
Get the wilkinite fine powder, put and be heated to 250-300 ℃ in the retort furnace, take out and put 5 hours heat-up times, weigh, calculate the weight that subtracts mistake to room temperature.
Take by weighing the wilkinite super-fine powder 750g after the dehydration respectively, dehydration talcum super-fine powder 180g, boric acid 60g, palmitinic acid 10g puts into high energy ball mill and is ground to particle diameter≤100nm, takes out, and promptly gets to be used for the compsn that friction pair is handled.
2. the preparation of antifriction lubricant
Take by weighing above-mentioned compsn 2.0g, join among the 10W-40 finished lube 4000ml, mix, promptly get.
3. experimental result
On Passat 1.8T type car, make an experiment, this car has gone 170,000 kilometers, not overhaul; Show as and be short of power, burn oil, vapor pipe has blue smoke during anxious the acceleration; Noise is big, and oil consumption is high, adds friction pair compsn of the present invention front and back indexs such as cylinder pressure, noise, consumption of lubricating oil, tail gas are measured; Operating range is 2000km, and the result sees table 3,4.
The variation that cylinder was pressed before and after table 3 used
Noise before and after table 4 uses, the variation of consumption of lubricating oil
The result shows that after Passat 1.8T type car used friction pair compsn of the present invention, cylinder was pressed and is significantly improved; Go behind the 2000km; Cylinder is pressed the prescribed value that reaches car, and consumption of lubricating oil also obviously lowers simultaneously, explains that friction pair compsn of the present invention has good repair.
Embodiment 3
1. the preparation of the present composition
Take by weighing Red Halloysite ore 1000g, be ground into meal, add the water of 5 times of amounts then, stir and make it to be dispersed into molecule, cross 200 mesh sieves, filtrating is placed deposition, gets deposition, and oven dry promptly gets.
Take by weighing humite ore 500g, szaibelyite ore 200g is ground into micropowders with ball mill respectively, and particle diameter is 10-25 μ m.
Red Halloysite micropowders, humite micropowders, szaibelyite micropowders put be heated to 450-700 ℃ in the retort furnace, take out and put 2 hours heat-up times, weigh, calculate the weight that subtracts mistake to room temperature.
Take by weighing the Red Halloysite super-fine powder 700g after the dehydration respectively, dehydration humite super-fine powder 230g, szaibelyite powder 60g, butyl(tetra)titanate 10g puts into high energy ball mill and is ground to particle diameter≤100nm, takes out, and promptly gets compsn of the present invention.
2. the preparation of antifriction lubricant
Get above-mentioned compsn, the ratio by 0.5%, 1.0%, 2.0%, 3.0% joins the automobile-used gear grease of the precious HD 80W-90 in Mobil road, mixes.
3. experimental result
Frictional wear experiment adopts on the MM-10W type end side experimental machine and carries out, and sample is the 45# steel up and down, and hardness is 235HB.Experiment load 300,600,900N, the time is 15min, temperature is a room temperature.Experiment is the MV of three experiments.The result sees table 5.
The friction co-efficient value (0.40m/s) of table 5 different additive amount
The result shows: under same test condition, add the present composition 0.5%, 1.0%; 2.0%, 3.0% machine oil with do not add comparing of the present composition, frictional coefficient obviously reduces; Therefore; Add the present composition and help to reduce frictional coefficient, reduce watt consumption, greatly improved the anti-attrition performance of base oil.
Claims (8)
1. one kind is used for the compsn that friction pair is handled, and it is characterized in that being made up of the weight percent of following each component:
Aluminosilicate-type ore nano powder: 36-76%
Hydroxyl magnesium silicate class ore nano powder: 28-58%
Boric acid or borate: 6-8%
Dispersion agent: 1-5%
2. be used for the compsn that friction pair is handled according to claim 1 is said, wherein the aluminosilicate-type ore is selected from ore or the compound that natural and synthetic contain the pure aluminium silicate composition, comprises kaolinite, wilkinite, smectite; Zeolite, agalmatolite, Red Halloysite, illite; Dickite, attapulgite, sillmanite, monothermite; Halloysite, meal wheat stone, chlorite, the mixture of one or more in the feldspar.
3. be used for the compsn that friction pair is handled according to claim 1 is said, wherein the hydroxyl magnesium silicate ore is selected from ore or the compound that natural and synthetic contain the hydroxyl magnesium silicate composition, comprises serpentine; Talcum, sepiolite, nacrite; Humite; Forsterite, Tremoliteor Tremoliteasbestos, the mixture of one or more of diopside.
4. according to the said compsn that is used for the friction pair processing of claim 1, its mesoboric acid or borate are selected from boric acid, borax, szaibelyite, ulexite, colemanite, howlite, ludwigite, the mixture of one or more in the suanite.
5. be used for the compsn that friction pair is handled according to claim 1 is said, wherein dispersion agent comprises one or more mixture of caproic acid, sad, capric acid, LAURIC ACID 99 MIN, tetradecanoic acid, palmitinic acid, Triple Pressed Stearic Acid, eicosanoic acid, mountain Yu acid, oleic acid, linolic acid, butyl(tetra)titanate, silane coupling agent.
6. according to the said compsn that is used for the friction pair processing of claim 1-5; It is characterized in that aluminosilicate-type ore, hydroxyl magnesium silicate class ore, boric acid and borate ore; Carry out fragmentation respectively; Ore dressing separates useless mineral or toxic mineral, and the ore powder of getting separation and purification is broken into the powder about granularity 1mm.
7. according to the scope internal heating dehydration of the powder of the described aluminosilicate-type ore of claim 1-6, hydroxyl magnesium silicate class ore, boric acid class ore, obtain the mineral dust that dewaters at 100 ℃-1000 ℃.
8. according to the described compsn that is used for the friction pair processing of claim 1-7; Take by weighing dehydration aluminosilicate-type mineral dust, Anhydrohydroxy magnesium silicate type mineral dust, dehydration borate mineral dust on request; Dispersion agent mixes, and puts that attrition process becomes nanometer powder in the kibbler; Granularity requires promptly to get compsn of the present invention less than 1000nm.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651015A (en) * | 2013-11-22 | 2015-05-27 | 大连顺泰科技有限公司 | Composite additive for running-in, and preparation method thereof |
| CN104789297A (en) * | 2015-03-23 | 2015-07-22 | 张涵 | Metal wear repairing agent and preparation method thereof as well as lubricating oil |
| CN105062617A (en) * | 2015-08-21 | 2015-11-18 | 青岛索孚润化工科技有限公司 | Nanometer lanthanum silicate lubricant additive and preparation method thereof |
| CN105316080A (en) * | 2014-07-29 | 2016-02-10 | 上海宝钢工业技术服务有限公司 | Preparation method for lubricating oil additive with energy-saving, antiwear and self-repairing functions |
| CN105419907A (en) * | 2014-09-12 | 2016-03-23 | 北京赛复瑞孚科技发展有限公司 | Self-repair solution, preparation method and use method thereof |
| CN105602010A (en) * | 2015-12-28 | 2016-05-25 | 宁波卡利特新材料有限公司 | Method for preparing modified rubber strengthening agent for relieving die wear |
| CN108778570A (en) * | 2016-03-18 | 2018-11-09 | 霍加纳斯股份有限公司 | The powder metal composition being easily worked |
| CN112210422A (en) * | 2019-07-09 | 2021-01-12 | 上海好旭实业发展有限公司 | Flame-resistant high-temperature lubricating grease with anti-wear self-repairing function and preparation method thereof |
| TWI753776B (en) * | 2021-02-19 | 2022-01-21 | 胡秉宸 | A compound for forming a protective layer on metals and its manufacturing method |
| CN114106913A (en) * | 2021-11-08 | 2022-03-01 | 周海涛 | Self-repairing lubricating oil for cam mechanism and preparation method thereof |
| CN114606041A (en) * | 2022-03-16 | 2022-06-10 | 四川大学 | Wear-resistant lubricant based on modified halloysite and preparation method thereof |
| CN115232660A (en) * | 2022-06-24 | 2022-10-25 | 佛山科学技术学院 | Remanufactured forming layer surface processing strengthening material and preparation method and application thereof |
| CN115678635A (en) * | 2022-10-14 | 2023-02-03 | 广州润泰新材料科技有限公司 | Lubricating oil additive and lubricating oil |
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| CN1317041A (en) * | 1999-07-06 | 2001-10-10 | 尼古拉维奇·赛戈·亚力山德罗夫 | Composition for treatment of friction pairs |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1317041A (en) * | 1999-07-06 | 2001-10-10 | 尼古拉维奇·赛戈·亚力山德罗夫 | Composition for treatment of friction pairs |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651015A (en) * | 2013-11-22 | 2015-05-27 | 大连顺泰科技有限公司 | Composite additive for running-in, and preparation method thereof |
| CN105316080A (en) * | 2014-07-29 | 2016-02-10 | 上海宝钢工业技术服务有限公司 | Preparation method for lubricating oil additive with energy-saving, antiwear and self-repairing functions |
| CN105419907A (en) * | 2014-09-12 | 2016-03-23 | 北京赛复瑞孚科技发展有限公司 | Self-repair solution, preparation method and use method thereof |
| CN105419907B (en) * | 2014-09-12 | 2018-10-02 | 北京赛复瑞孚科技发展有限公司 | Selfreparing solution, its method of preparation and use |
| CN104789297A (en) * | 2015-03-23 | 2015-07-22 | 张涵 | Metal wear repairing agent and preparation method thereof as well as lubricating oil |
| CN105062617A (en) * | 2015-08-21 | 2015-11-18 | 青岛索孚润化工科技有限公司 | Nanometer lanthanum silicate lubricant additive and preparation method thereof |
| CN105602010A (en) * | 2015-12-28 | 2016-05-25 | 宁波卡利特新材料有限公司 | Method for preparing modified rubber strengthening agent for relieving die wear |
| CN108778570B (en) * | 2016-03-18 | 2022-02-25 | 霍加纳斯股份有限公司 | Easily processable powder metal compositions |
| CN108778570A (en) * | 2016-03-18 | 2018-11-09 | 霍加纳斯股份有限公司 | The powder metal composition being easily worked |
| CN112210422A (en) * | 2019-07-09 | 2021-01-12 | 上海好旭实业发展有限公司 | Flame-resistant high-temperature lubricating grease with anti-wear self-repairing function and preparation method thereof |
| TWI753776B (en) * | 2021-02-19 | 2022-01-21 | 胡秉宸 | A compound for forming a protective layer on metals and its manufacturing method |
| CN114106913A (en) * | 2021-11-08 | 2022-03-01 | 周海涛 | Self-repairing lubricating oil for cam mechanism and preparation method thereof |
| CN114606041A (en) * | 2022-03-16 | 2022-06-10 | 四川大学 | Wear-resistant lubricant based on modified halloysite and preparation method thereof |
| CN115232660A (en) * | 2022-06-24 | 2022-10-25 | 佛山科学技术学院 | Remanufactured forming layer surface processing strengthening material and preparation method and application thereof |
| CN115232660B (en) * | 2022-06-24 | 2023-08-15 | 佛山科学技术学院 | Remanufactured shaping layer surface processing reinforced material and preparation method and application thereof |
| CN115678635A (en) * | 2022-10-14 | 2023-02-03 | 广州润泰新材料科技有限公司 | Lubricating oil additive and lubricating oil |
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Application publication date: 20120215 |