Lubricant for coating metal surfaces
(57) Abstract:The inventive lubricant contains, by weight. percent : molybdenum disulfide 40 - 70; polyvinyl chloride or cellulose acetate 0.5 to 2.5 and three-3,5-xylinechart else. table 2. The invention relates to lubricants, in particular for lubricants for coating metal surfaces.Currently in the USSR and abroad there is a fairly wide range of lubricants with anti-friction properties due to the use of lubricating oils Mondialogo and synthetic origin and incorporating solid fillers, in particular molybdenum disulfide. As the dispersion medium in these lubricants are petroleum oils, synthetic fluids, or a mixture thereof. Having a high anti-friction properties, these greases have very limited resource of time, usually expressed by hundreds of hours. Prolonged exposure to high temperature, oxygen, water vapor causes the resinification of petroleum oils and greases based on synthetic fluids in the absence of thickeners lose their kolodney stability. While the solid phase particles are deposited, synthetic fluid, flowing down from powernoise the operating conditions of the associated components and does not preclude corrosion.Known grease containing molybdenum disulphide and methylsiloxane liquid as the dispersion medium.The disadvantage of this lubricant is that it is operable at temperatures up to 300aboutAnd prolonged use of it leads to increased friction and reduced several times the service life of the friction pairs. In addition, this grease has a tendency to stratification.The closest in technical essence to the invention is a lubricant for coating nodes surfaces containing molybdenum disulfide and three-3,5-seleniumtest. The lubricant contains the Mac. % :
Three-3,5-Xylenol - phosphate 10 - 50
The disulphide of molybdenum 50 - 90.A disadvantage of the known lubricant is a shorter lifetime due to the low stability due to stratification.The aim of the invention is to increase lubricant life by improving colloidal stability.To achieve this goal grease including molybdenum disulfide and three-3,5-celenistica, further comprises polyvinyl chloride or cellulose acetate in the following ratio, wt. % :
The disulphide of molybdenum 40 - 70
Polyvinyl chloride or acetylchol - lulose 0.5 to the three-3,5-celenistica polymeric thickener - Prineville (PVC) or cellulose acetate ("A") at the specified mixing ratio. In keeping PVC or "A" in the specified mass ratio prevents separation lubrication and leakage of oil, included in its composition, operation and increase the service life of the lubricant, which allows to conclude that the materiality of the alleged differences.For the preparation of lubricants used:
Disalcid molybdenum TU 48-19-133-85
Three-3,5-xylinechart THE 34.70.11335-88
PVC GOST 14332-78
"A" GOST 20282-84
Grease was prepared as follows.Three-3,5-xylinechart when heated was added PVC or "And" and stirred the mixture until complete dissolution of the polymer. Then introduced into the resulting mixture of molybdenum disulfide and the mixture was cooled. By the described method were obtained the following sample lubricants (see table. 1).We received samples of the residue were determined colloidal stability according to GOST 7142-74 at room temperature, 50 and 120aboutAnd the coefficient of friction at room temperature 120aboutC.Colloidal stability was determined by the number of pressed oil wt. % . The results of the test lubricants are shown in table. 2.Thus, proves. (56) Sinitsyn centuries grease in the USSR, M. : Chemistry, 1984, S. 15.USSR author's certificate N 883162, class C 10 M 137/04, 1981. LUBRICANT FOR COATING METAL SURFACES, containing molybdenum disulphide and three-3,5-xylinechart, characterized in that it further comprises polyvinyl chloride or cellulose acetate in the following ratio, wt. % :
Molybdenum disulfide 40 - 70
Polyvinyl chloride or cellulose acetate 0,5 - 2,5
FIELD: machine engineering, namely modification of rubbing surfaces of kinematic pairs.
SUBSTANCE: method comprises steps of placing between rubbing surfaces disintegrated mineral composition containing synthetic modification of serpentine produced by diluting in water mixture of α-quartz and magnesium hydroxide at temperature 120 - 170°C and pressure 1.2 - 15.0 at for further formation of crystals. Chrysotile having monocline syngony with coordination numbers 5.0< a< 7.3A°, 9.0<b< 9.2A°, 7.0<c< 7.3A° and with angles β between positive directions of crystallographic axes 90° or 93° is used as seed for producing crystal of synthetic modification of serpentine. Summed value of molar masses of α-quartz and magnesium hydroxide corresponds to molar mass of synthetic modification of serpentine. Composition includes in addition homologs of fullerenes Cm where m ≥ 60 at next relation of components, mass %: synthetic modification of serpentine, 70 - 90; homologs of fullerenes Cm, 10 - 30. Invention allows to form coating with receive friction factor lowered to 0.001, increased hardness HRC 90 - 95.
EFFECT: enhanced wear resistance, increased useful life period of coating, possibility for realizing method with use of oil lubricant and also without any lubricant.
FIELD: lubrication systems.
SUBSTANCE: proposed method consists in delivery of solid lubricant to side face of rail at simultaneous application of lubricant on wheel flange; solid lubricant contains mineral oil or mixture of mineral oils, solid oil, mazut, graphite and/or molybdenum disulfide and anti-wear solid filler and bitumen used as binder. Graphite and/or molybdenum disulfide in the amount of 50-70 mass-% is used as filler for solid lubricant. Solid lubricant is applied on wheel flange by means of lubricating rod.
EFFECT: reduction of wear of rails, wheel ridges of rolling stock and cranes.
2 cl, 1 tbl
SUBSTANCE: lubricant used in fabrication of hot-rolled tubes, e.g. for internal tools of piercing mill, contains 24-29,5% sodium tripolyphosphate and sodium chloride, 35-39% high-ash solid fuel combustion waste and talc (1:20), 1.0-1.5% zinc powder, and 30-40% calcium carbonate and polyvinylacetate glue (1:4).
EFFECT: increased wear resistance of tool, improved quality of inside surface of deformed tube, and increased (by 11-12%) rolling velocity.
2 tbl, 3 dwg
SUBSTANCE: invention relates to high-temperature solid-lubricating compositions used in friction units at friction temperatures up to 400°C in air. Composition of invention comprises (i) 30-70% molybdenum disulfide modified with organofluorine surfactant-containing epilam at their weight ratio 1:(2-3) and (ii) 30-70% graphite. Preparation of lubricating coating involves preliminarily drying molybdenum disulfide at 100-110°C for 2-3 h followed by treatment with above-said epilam at weight ratio 1:(2-3) by way of impregnation at room temperature for 10-18 h, drying of resulting product at room temperature until complete desiccation, thermal fixation at 100-110°C for 2-3 h, and mixing with graphite in indicated proportion.
EFFECT: increased wear resistance of friction units under heavy-duty conditions.
2 cl, 2 tbl, 5 ex
SUBSTANCE: invention relates to high-temperature solid-lubricating compositions used in friction units at friction temperatures up to 400°C in air. Composition of invention comprises 30-70% molybdenum disulfide and 30-70% graphite impregnated with organofluorine surfactant-containing epilam at weight ratio 1:(2-3). Preparation of composition involves preliminarily drying graphite at 100-110°C for 4-5 h followed by treatment with organofluorine surfactant-containing epilam at weight ratio 1:(2-3) by way of impregnation during 20-24 h, drying of resulting product at room temperature until complete desiccation, thermal fixation at 100-110°C for 2-3 h, and mixing with molybdenum disulfide in indicated proportion.
EFFECT: increased wear resistance of friction units under heavy-duty conditions.
2 cl, 2 tbl, 5 ex
FIELD: railway transport.
SUBSTANCE: said utility invention relates to the railway transport, in particular to friction modifiers applied on railway stock wheel treads. Character: the friction and adhesion activator is foam glass.
EFFECT: increase in traction force in difficult track rolling stock operating conditions.
SUBSTANCE: invention relates to the technology of producing lubricant materials, particularly antifriction suspensions which can be used in production of grease for heavily loaded friction assemblies of machines and mechanisms, as well as when wearing in new components into friction assemblies and during repair and restoration operations. The suspension contains a liquid dispersion medium - base oil and a dispersed phase incorporated into the base oil in powder form. The powder used is potassium titanate powder consisting of layered particles having a flaked shape and pre-treated with a water-soluble surfactant. Content of the powder in the suspension lies between 0.1 and 60%. The suspension can also contain an oil-soluble surfactant, e.g. oleic acid.
EFFECT: improved antifriction, antiscoring and wear-resistance properties.
5 cl, 2 tbl
SUBSTANCE: powdered composition contains serpentine Mg6[Si4O10](OH)8 with embedded magnetite F3O4 in the following ratio in wt %: serpentine 65-75, embedded magnetite 20-30, impurities - not more than 5. The powdered composition also contains serpentine with embedded magnetite, magnesite MgCO3 and magnesium-iron silicate (MgFe)7[Si4O10](OH)8 in the following ratio in wt %: serpentine 65-75, magnetite 10-25, magnesite 5-15, magnesium-iron silicate 2-7. Serpentine is contained mainly in the lizardite IT phase, the size of the embedded magnetite is not more than 50-300 nm. The lubricant composition contains 0.5-80 wt % powdered compositions in the binder. The lubrication method involves placing powdered compositions in the binder between friction surfaces.
EFFECT: cutting on time for formation of a film without preliminary micro-polishing, lower friction, high wear-resistance and longer service life of friction surfaces, low consumption of lubricants and electrical power during operation of machines and mechanisms.
21 cl, 1 tbl