|
|
Steel part inductive hard-facing Prior to inductive hard-facing of the charge, the part is subjected to preliminary hardening to the depth of 0.3-0.6 mm. Used charge consists of the mix of 20-30% of boron carbide and 70-80% of flux. Said mix in depth of 0.8-1.4 mm is applied on the part. Said charge is fused by high-frequency current and cured at, at least, 1240°C for 50-70 s. |
|
|
Method of producing thin-film polymer nanocomposites for superdense magnetic information recording Method of producing polymer nanocomposites in form of thin films for superdense information recording involves producing a precursor consisting of polyvinyl alcohol, water and a mixture of water-soluble salts of ferric and ferrous iron, followed by treatment with at least one water-soluble dialdehyde at pH 0-3 in the presence of an acid as an acidifying agent, obtaining a thin film on a dielectric nonmagnetic substrate depositing the precursor on a substrate rotating on a centrifuge to form a gel film, treating the obtained gel film with an alkali, the alkali being added in an amount allows complete alkaline hydrolysis of the mixture of iron salts to form a mixture of magnetite or maghemite. The obtained gel film is treated with the alkali in ammonia vapour which is formed from aqueous ammonia solution (NH4OH) or hydrazine hydrate (N2H4·H2O) for 5.0-15.0 hours. |
|
|
Cutting tool coating composed by cutting edge and cutting tool including such coating Invention relates to cutting tool with coating on cutting edge. Coating on cutting tool is composed by cutting edge. Note here that this coating is applied on rear surface (6b) of primary element (6) of edge (5) composed by the area nearby blade cutting edge (2). Note here that said coating features higher hardness than that of the primary element (6). Said coating is applied by electric discharge between said rear surface (6b) and discharge electrode for deposition of electrode material or its reacted substances produced by discharge energy on rear surface (6b). Discharge electrode is made by forming of metal powder, powder of metal compound, powder of ceramic material or the mix thereof. Cutting edge composed by said coating extends outward from the primary element edge (6) represents s transverse rib line between front surface (6a) and rear surface (6b) to distal end side of cutting edge (2). Cutting edge angle makes 10 through 20 degrees. |
|
Current-transmitting surface of dismountable contact connection (DCC) is cleaned and degreased. After application of liquid flux the surface is heated up to a temperature of 65-70°C. After mechanical treatment and removal of flux excess bismuth-based alloy with melting temperature of 47-60°C and thickness less than 0.1 mm is applied to the current-transmitting surface. In result of contact hybrid melting the coating is formed. In 3-4 minutes after application of the alloy to the current-transmitting surfaces they are cooled up to a temperature of 40°C. |
|
|
Method of reinforcing power constructions Invention relates to methods of reinforcing power constructions, which have existing or predictable collapsing sections, by means of strips of composition material. As strips used is woven or non-woven reinforcing filling agent from glass, basalt, synthetic polymer or carbon fibres. Said fibres are impregnated with polymer composition in amount 30÷60% from composite weight, providing their adhesion to power constructions and further hardening from +5°C to +100°C for from 5 minutes to two days. Polymer composition contains in wt %: epoxy resin 100, active epoxy diluent 5÷130, hardening agent 15÷110, thickening agent 5÷50, pigment or dye 0.5÷50. As gardening agent it contains product of interaction of amine component with monocarboxylic acids. as amine component used is mixture, consisting of primary aromatic amine or mixture of aromatic amines (A), secondary aliphatic amino alcohol (B) and tertiary aliphatic amino alcohol (C) in weight ratio A:B:C from 98:0.2:1.8 to 80:5:15. Monocarboxylic acid (D) is introduced in form of 25÷80% solution in monoatomic aliphatic or aromatic alcohol, or their ether with mono- or dicarboxylic acid, in ratio (A+B+C):D from 90:10 to 60:40 counted per 100% acid with further interaction by mixing in reactor at temperature from 50 to 130°C for from 20 to 120 minutes at rate of mixer from 100 to 3000 revolutions per minute. |
|
|
Method of depositing antifriction coatings on side surface of rails Method involves preliminary deposition of rough layer with thickness of 0.01-3.0 mm on a metal surface using an electrical discharge method, followed by deposition of an antifriction layer. Electrical discharge deposition is carried out using electrodes made of medium- and high-carbon steels, and the antifriction layer is deposited with a paint gun with thickness of 0.5-1.5 mm using a composition consisting of mineral oil or a mixture of mineral oils based on saturated hydrocarbons, modified with nanoparticles of iron, formed during thermal decomposition of liquid iron pentacarbonyl, which is premixed in the medium of oil in a reactor with mixer rate of 1000-2500 rpm for 30-120 minutes, followed by feeding a ternary mixture of powdered filler into said reactor while mixing, said mixture consisting of graphite (A), molybdenum disulphide (B) and tetrafluoroethylene polymer (C) in ratio A:B:C from 40:40:20 to 80:10:10. Said composition contains the following, pts.wt: mineral oil or mixture of mineral oils 100, iron nanoparticles 0.3-4.0 and ternary mixture of powdered filler 15-60. |
|
Application of cermet coating on steel part using indirect electric arc Proposed method comprises application of cermet paste on part surface to be hardened and heating to smelting of said paste and part surface layer by indirect electric arc initiated between graphite electrodes. At said heating, difference of potentials is created between graphite electrodes and part surface. Then, the part with applied cermet coating is heated to quenching temperature, held thereat and subjected to quenching in industrial or transformer oil. Thereafter, it is tempered and air cooled. In particular cases, part with applied cermet coating is heated at quenching up to 830°C and held thereat for 5 minutes. At tempering, the part with applied cermet surface is heated to 185°C and held thereat for 2 minutes. |
|
Method of timber metal coating Timber surface is coated with a ply of liquid glass prior to deposition. Ply of aluminium powder is powdered on non-solidified surface of aforesaid ply. Deposition of metal or alloy plies is effected by plasmatron at the power of 4.5 kW and plasma-forming gas flow rate of 0.5 m3/min. |
|
Method of making protective decorative coatings on wood articles Beforehand, wood surface is coated with first ply of epoxy resin and second ply of epoxy resin with aluminium powder at 1:1 ratio. Deposition of metal or alloy plies is effected by plasmatron at the power of 3.9 kW and plasma-forming gas flow rate of 0.8 m3/min. |
|
|
Method of making quartz containers Method of making quartz containers with a protective carbon coating for high-temperature processes involves depositing a polymer film on the working surface of the quartz container, followed by annealing in an inert atmosphere. Said film is deposited on the working surface of the quartz container by depositing polyhexamethylene guanidine hydrochloride or polydiallyldimethylammonium chloride from its 7-10% aqueous solution with pH 1-3 and subsequent annealing in an inert atmosphere at 900-1000°C for 30-60 minutes. |
|
|
Blank is fixed at spark-erosion machine powder electrode is brought thereto to overlap blank bore by said electrode. Voltage is fed to between electrode and blank to generate reiterating electric discharge to make stopping coat grow from bore edges. Note here that prior to voltage application bore edges are machined to make them skewed, or coat is skewed along bore edges in voltage application. Here, electrode may be used that has a ledge of sizes which allow its fitting so close to said blank that said ledge is located opposite bore inner side. |
|
Method of making contacts of vacuum arc-quenching chambers Powdered mixture and a workpiece of a high-electroconductivity material are placed in a vacuum chamber, where the powdered mixture is deposited in form of a coat on the workpiece by electron-beam deposit welding in a vacuum. Further electron-beam remelting of the entire volume of the fused coating is carried out in a single process cycle with deposit welding. |
|
Turbojet protected against self-guided rocket and method of its protection (versions) Turbojet comprises housing accommodating air intake, axial-flow compressor, combustion chamber, turbine vanes and afterburner. Afterburner inner surface is coated by heat-isolation coating with reflection factor at working temperature smaller than unity. Turbine rear support cowl is shaped to direct circular or truncated cone with vertex angle exceeding 90 degrees. Jet nozzle has throat with radius smaller than that of the circle circumscribed by turbine vane ends. Turbojet may be provided with jet nozzle that has the throat with radius equal to or smaller than turbine rear support cowl base. For protection of turbojet its vanes are irradiated simultaneously by microwave-band radio waves and radio waves reflected from rear support cowl via said nozzle and rear support cowl. Note here that radio waves are irradiated outward via het nozzle with decreased amplitude after multiple reflections from heat-protection coating as well as those reflected from turbine vanes. |
|
Structural element from magnesium alloy Part of structural element base material surface is treated to form surface roughness Rmax, of at least 1 mcm, and the highest of 200 mcm to produce metal texture. Structural element has a transparent anti-corrosion layer from magnesium oxide. |
|
|
Method of making electrode and surface processing by electrode discharge Invention relates to powder metallurgy, particularly, to production of sintered electrodes and surface processing by their discharge. Powder comprising electrically conducting material is placed in the mould to produce multiple compacted powder bodies. Said multiple compacted powder bodies are arranged in dense contact to apply isostatic pressure thereto. Then, these bodies are sintered. For processing, sintered body is drawn to the surface for electric discharge to fire. |
|
Electrode for surface processing by discharge and method of its fabrication Invention relates to surface processing electrode used for making wear proof film by discharge power. Produced wear proof film consists of electrode material or substance obtained in electrode material reaction under action of discharge power. Electrode is produced by thermal processing of unsintered mixed powder produced by compaction. Said powder comprises the powder satellite alloy with mean particle size of 3 mcm or smaller prepared using the jet mill and powder of metal or alloy with particle size of 3 mcm or smaller made by spraying or in chemical process. |
|
Method of making antifriction composition Antifriction composition is placed between friction surfaces for their modification. Said composition consists of serpentine-bearing material and bulged vermiculite and hydrocarbon binder. Bulged vermiculite is modified by natural high-molecular polysaccharide, preferably, chitozane. Said serpentine-bearing material represents serpentinite. The mix of dispersed solid particles features the following ratio of components in wt %: serpentine-bearing material - 80-93, modified bulged vermiculite - 7-20. Antifriction composition is produced by mixing said components and binder in hydrodynamic cavitation dispersant to obtain disperse solid particle sized to smaller than 1 mcm. Antifriction composition is produced at friction of contacting surfaces in the form of cermet film containing oxides of aluminium, silicon and magnesium. |
|
Invention may be used in production of power and chemical plants of higher heat resistance. Stack of nickel 1-1.2mm-thick plate and steel plate is welded by explosion. Welded two-layer stack is hot rolled at 900-950°C with reduction to nickel layer thickness making 0.3-0.5 of its initial thickness. This bimetallic workpiece and aluminium plate is welded by explosion at explosive detonation rate of 2000-2700 m/s. Height of explosive charge and welding gap between propelled aluminium plate and nickel layer of fixed bimetallic workpiece is selected to ensure collision rate of both of 420-500 m/s. Welded three-layer workpiece is subjected to heat treatment for formation of solid intermetallide diffusion interlayer between aluminium and nickel at 600-630°C for 1.5-7 h with air cooling that causes spontaneous separation of aluminium and nickel along intermetallide diffusion interlayer. |
|
Method of metal surface modification Method includes microalloying of a surface alloy layer with the help of magnetic and abrasive treatment with a magnetic and abrasive powder with particle size from 250 to 600 mcm, with linear speed of rotation of magnetic poles from 500 to 600 m/min and working gap value between poles 2 - 10 mm with formation of a protective layer of an oxide film. The magnetic and abrasive powder is a powder, containing α-ferromagnet matrix with content of molybdenum carbide of 50 - 55% in it. Magnetic and abrasive treatment is carried out in two stages: at the first of which the magnetic field intensity in the working gap is 1-1.5 T for 1-1.5 min, and at the second stage - the magnetic field intensity is 0.2-0.4 T for 1-0.5 min. |
|
|
Method of making antifriction composition Proposed method consists in placing antifriction composition between rubbing surfaces that modifies said surfaces and contains natural dispersed serpentine-bearing material mixed in hydrodynamic cavitation disperser with hydrocarbon binder. Note here that mineral-organic layer of organic derivatives of carbon, silicon, manganese and iron is formed on said surfaces. For this, serpentinite is used modified by natural high-molecular polysaccharide, preferably, chitosan, at particle size smaller than 1 mcm at the following ratio of components in wt %: serpentinite - 96.5-97.5, chitosan - 2.5-3.5. |
|
Invention relates to machining ICE components by means of appropriate metal working tool. Proposed method comprises machining of, at least, the surface of one exhaust gas guide made from corrodible material by appropriate metal surface working tool. Said tool is brought in contact with, at least, one tribochemically activated substance. Said substances is activated in machining depending upon definite force of tool pressing and/or machining temperature to form corrosion-resistant surface in tribochemical reacton, said surface representing a triboreactive layer. Abode described method is used to produce crankcase and cylinder liner. |
|
Coating from titanium dioxide with smaller crystallites and method of its making Sol-gel compositions re made to be applied onto substrate. Said substrate is heated at temperature necessary for forming coating from titanium dioxide with crystallite size smaller than 35 nm. Proposed coating features better antibacterial properties, self-purification and/or wetting ability. |
|
Electrical steel sheet with oriented grain structure, and its manufacturing method Sheet includes an aggregated section of a glassy covering film, the thickness of which continuously exceeds the average thickness of the glassy covering film by two or more times, and the size of which is 3 mcm or more in the direction that is parallel to the steel sheet surface. Ratio of total length of aggregated sections crossed with a piece with length of 500 mcm or more, which is parallel to the steel sheet surface, to the length of that piece is 0.15 or less. In order to implement the manufacturing method of the above sheet, nitration of the steel sheet is performed, the agent, the main component of which is MgO, is applied, annealing is performed for formation of a glassy covering film based on forsterite with aggregated section of glassy covering film. Annealing is performed by heating from the first temperature of 850°C or less to the second temperature of 1000°C or more and 1100°C or less in a mixed gas atmosphere containing gaseous H2 and gaseous N2; at that, fraction of gaseous N2 is 20 vol % or more. Then, the atmosphere is changed over to atmosphere of gaseous H2 at the above second temperature; at that, oxygen potential P(H2O)/P(H2) is provided, which comprises 0.05 to 0.3 when temperature is 850°C or less during heating in mixed gas atmosphere. |
|
Composition for obtaining protective coating on steel parts Composition for obtaining a protective coating on steel parts contains the following components, wt %: aluminium-chromium-phosphate binding substance 30-35, chromic anhydride 5-10, water 12-18, and aluminium powder is the rest. The composition contains aluminium powder with fraction of up to 10 mcm. |
|
|
Method of depositing filler corrosion-erosion powder on part steel surface Invention relates to protection of steel surfaces against erosion including that caused by cavitation, by building up corrosion-erosion-resistant powder. First, corrosion-erosion-resistant self-fluxing filler powder material and sieved and calcined. Heating zone is created at part surface by continuous laser beam to feed filler material thereto, to fuse it and mix with fused mother material. Building-up is carried out on shifting laser beam at constant rate and invariable lens focus position relative to processed surface at radiation density q varied in the range of 5×108 ≥ q ≥ 3×108 W/cm2, and at mother metal-to-built-up metal ratio of γ = 5-15%. |
|
Method of repairing metal plate worn-out end force part Invention relates to repair of metal plate worn-out end face of reparable part. Step of making recess is carried out whereat forged part is used as an electrode made from one of the following materials, i.e. metal powder, metal allot powder and ceramic powder.Then, pulse discharge between electrode end surface and metal plate end face is initiated in fluid or gas to cause electrode abrasion that brings about a recess in its end surface shaped to metal plate end face outline. Step of making auxiliary coating is performed whereat electrode is displaced in direction perpendicular to metal plate lateral side, at given preset discharge gap, to initiate pulse discharge between electrode recess inner side surface and metal plate end face side in gas of fluid to make auxiliary coating. Now, step of making final coating is performed whereat pulse discharge is initiated between electrode recess lower surface and metal plate end face upper surface in gas or fluid to make clad layer. |
|
Machining method of radial-thrust bearing prior to operation, and device for its implementation Machining of several bearings (2 to 6) of the same standard size is performed at one and the same time. Mixture of glycerine with ultradisperse copper powder, copper chloride, tin chloride and iron chloride is used as process medium. After activation of rotation drive and application of load to working surfaces of bearings during 15-20 minutes, final anti-friction nonabrasive machining takes place, and as a result, a film is formed on race tracks of races and rolling bodies of bearings. A set of bearings is assembled on the device that includes drive shaft (1) and bearing fastening shell (9). External races of bearings are installed in pairs in shells (9) containing guide bushings (10) and having the possibility of translational movement in bath (12) filled with process medium, and internal races are installed through bushings (2) and have the possibility of being moved axially on drive shaft (1). At that, the first bushing (2) adjoins thrust washer (5) installed in a fixed position in the end face of shaft (1), and the last bushing (2) of the set receives axial load from stock (6). |
|
Wear-resistant article with protective coating Wear-resistant coating has a first surface and a second surface linked to the first surface to provide contact with the first surface during operation. Each of the first surface and the second surface contains materials selected from a group consisting of nickel, nickel alloys, superalloys based on nickel, cobalt, alloys based on cobalt and nickel, steels and combinations thereof, and a first protective coating on at least part of the first surface. The first protective coating has a first coating layer and a second coating layer. The first coating layer has hardness ranging from about 1500 Vickers units to about 3500 Vickers units and contains a first component and a second component. The first component contains boron, titanium or chromium, and the second component contains nitrogen or carbon. The second coating layer has hardness ranging from about 300 Vickers units to about 1500 Vickers units. At least part of the first protective coating gets into contact with the second surface when the second surface gets into contact with the first surface. |
|
Method of applying coating on substrate surface and coated product According to the method, a gas stream which forms a gas-powder mixture with powder is fed at supersonic speed and then directed onto the surface of an object. The powder used is that of material selected from a group comprising niobium, tantalum, tungsten, molybdenum, titanium, zirconium, nickel, cobalt, iron, chromium, aluminium, silver, copper, a mixture of at least two of said compounds, their alloys with each other or with other metals selected from a group comprising rhodium, palladium, platinum, gold and rhenium, wherein the powder has particle size of 0.5-150 mcm, oxygen content of less than 500 ppm and hydrogen content of less than 500 ppm. |
|
Method to produce bimetal sliding bearings On a steel plate of a bearing base arranged in an iron chill, the shape of the inner surface of which complies with the shape of a produced bearing, an antifriction alloy is applied by means of its extrusion. Preliminarily a layer of metal is applied onto the specified plate, producing oxides with a lower strength compared to strength of plate steel oxides. The anti-friction alloy is poured into an iron chill with a limited low melt temperature, and it is applied in a hardening manner by means of serial contact with the previously applied layer of metal to develop an adhesive link between them. |
|
Application method of antifriction coatings to gear wheels Invention refers to gear transmissions of open and closed types. Application method of antifriction coatings to working surfaces of teeth of hardened gear wheels consists in the following: working surface of teeth of coated gear wheel (1) is cleaned from oxides by means of a metal brush; then, anti-friction material is applied by means of operation in the pair with gear wheel made from the applied antifriction material, for example aluminium. Sliding of working surfaces of teeth of matched wheels ensures the transfer of antifriction material. |
|
Application method of wear-resistant coatings on working surface of parts of tillage machines Method involves arc surfacing of working surface along reinforcement lines with wear-resistant filler material. Density of filler material is higher than that of parent metal of the part. Compression stresses on thickness of working surface are created at cooling of the part. Surfacing of working surface along reinforcement lines is made in the form of points of wear-resistant material with layer thickness of 0.8-2.0 mm. Points of wear-resistant material are located at some distance from each other with covering of gaps of parent metal between adjacent points in the direction of working surface movement of the part. Surfacing of each next point along reinforcement lines is performed at the speed providing the covering of thermal influence zones of adjacent points with formation of hardening structure on thickness of parent metal of working surface. |
|
Plate from titanium or titanium alloy with perfect ratio between stamping capability and strength Plate from titanium or a titanium alloy with improved combination of stamping capability and strength includes a basic plate from titanium or a titanium alloy rolled in one direction, and a lubricant film applied onto surface of the basic plate from titanium or a titanium alloy. The lubricating film surface has a friction coefficient during sliding set as less than 0.15. The basic plate from titanium or a titanium alloy extends in rolling direction L (L-El) and Lankford value r in direction T, perpendicular to rolling direction (T-r), besides, L-E1 and T-r satisfy the following expression (1): (T-r)/(L-El)≥0.07 (1). |
|
Method of treatment of steel parts surfaces Cold plastic deformation of the treated surface is carried out during continuous feeding of radical-generating substance to the zone of deformation to achieve a given quantity of material hardening of the surface layer. This is followed by chemical and thermal processing of parts by heating of parts to the temperature of chemical modification of radical-generating substance at which the destruction of its molecules starts, the details are exposed at a given temperature at continuous supply of radical-generating substance within the time required for maximum saturation with radicals of the hardened surface layer. Before heating the parts, vacuum is generated in the chamber or shielding gas nitrogen is injected, and then the parts are heated, and radical-generating substance is a mineral oil. |
|
|
Composition contains the following ingredients wt %: 30-35 of aluminium-chromium-phosphate binder, 12-18 of water, 2-3 of chromic anhydride, 1-3 aluminium hydroxide powder, 10-22 aluminium- silicon powder, and the rest is aluminium powder. Powders of aluminium hydroxide, aluminium - silicon, aluminium, have a fraction of up to 10 microns. |
|
|
Invention relates to a cutting tool, in particular, to knives for cutting food products. A cutting tool (1) has a cutting section (13) of a cutting blade with coated surface (7) made of electrode material or a product of reaction of electrode material melted by pulse discharges induced between the cutting section (13) of the blade and the electrode in the engine oil and between the body of the blade and the coating the gradient metallic structure is formed with the depth from 5 micrometres to 30 micrometres. An electrode is a moulded product, moulded from powder of one of the metal or a mixture powder of metals, or the metals, metal compound or metal compounds, of the ceramic material or ceramic materials, heat-treated moulded product, which is a moulded product subjected to heat treatment. The moulded product contains at least one of Ti, Si, cubic BN, TiC, WC, SiC, Cr3C2, Al2O3, ZrC2-Y, TiN and TiB. |
|
Method for corrosion-resistant covering application to titanium alloy hardware Invention relates to method of applying corrosion-resistant covering to titanium alloy hardware and may be used to protect titanium alloy tubes from corrosion when the tubes are used in marine environment containing up to 20 wt % of chlorides. Hardware surface is covered with thermally unstable ruthenium salt solution Ru(OH)Cl3 with viscosity raising additives. Thermal annealing is done, as a result of which a layer of ruthenium oxide is applied. Corrosion-resistant covering is to be applied to 100% of protected surface. The solution may additionally contain H2IrCl2, TiCl3, HCl. Glycerine in ratio up to 20% of general solution amount may be used as a viscosity raising additive. Thermal annealing may be done in oxidising atmosphere at temperature of 450°C. The hardware surface is pretreated to increase roughness and wettability, particularly, bead blasting treatment is done with degreasing following it. Covering of titanium alloy hardware of any degree of complexity is provided, including covering hardware with weld seams, particularly, inner surface of tubes and double bottom tanks. |
|
Steel tool or carbide tool treatment method Steel tool or carbide tool treatment method involves application of diffusion coating by saturation of steel or carbide tool in eutectic lead-lithium melt with addition of copper and nickel so that the coating is obtained. After application of coating the tool is strengthened by its being aged on material with hardness of 10 to 18 HRCe at value of contact stresses of 2000 to 5000 MPa during 2-5 minutes. |
|
|
Method of surface impregnation of steel actuator cutting edge of tiller Method includes saturation of a cutting edge with strengthening elements from a plaster containing 84 or 90 wt % of boron carbide and 16 or 10 wt % of a fused flux for induction fusing P-0.66. The plaster is applied onto the cutting edge and the actuator's tip at the side contacting with soil, saturation is carried out with high-frequency currents with heating of the saturated surface up to the temperature of 1250-1300°C and soaking time of 1-2 min. Subsequent thermal treatment is carried out by heating of the entire tiller up to 850-900°C with subsequent tempering in the oil medium. The fused flux for induction fusing P-0.66 contains modifiers, such as a mixture of a silicocalcium powder 20 wt % and a powder of flux AN-348A 80 wt %. |
|
Method of processing surface of article made from titanium alloy Proposed method comprises preliminary preparation of article surface, placing article and current conduction titanium material in processing zone, creating vacuum in said zone, feeding negative potential, separately, to article and current conducting material, firing arc on current conducting material that burns in vapors of said material to produce plasma, bombarding, cleaning and diffusing article surface and accumulating ions of current conducting material on article surface at article surface temperature below that strength loss in article material to produce coating. Two current conducting materials are arranged in processing zone, one of titanium and another one of nickel-based alloy. Accumulation and diffusion of titanium material ions are performed at negative potential at article of 120-200 V in atmosphere of inert gas consisting of the mix of oxygen and argon in (1-2):1 ratio at 0.05-0.3 MPa. Thereafter, reaction gas feed is terminated to excite vacuum arc at second nickel-based material and to accumulate its ions at negative potential of 15-20 V. |
|
|
Laminar material from metal sheets and polymer Invention relates to laminar material made from metal sheets and polymer layer reinforced by fibers and bonded therewith, to be used in aircraft or aerospace engineering. Laminar material comprises at least one first metal layer of invariable thickness of at least 1.5 mm and at least one second of invariable thickness of at least 1.5 mm. Said first and second layers are bonded together by polymer layer reinforced by fibers, volume content of fibers not exceeding 45%. Aforesaid polymer layer comprises reinforcing fibers laid in polymer matrix and selected from the group including fiber glass, carbon fibers, drawn thermoplastic fibers, natural fibers and combinations thereof. Said fibers are impregnated by polymer matrix in partially hardened state. |
|
Complicated profile consisiting of metal profile coated with metal foil Invention is referred to a complicated profile (1), consisting of a metal profile (2) coated with metal foil (3), and a method of coating application on production line by means of the metal foil (4). The method includes subsequent transportation of preliminary cut-out sections of shaped profiles (2) made from plastic or metal. The coating of each shaped profile (2) section with metal foil (3) is ensured to couple the said foil (3) with the said profile (2) in any point of surfaces of metal foil. This coating also ensures detection of the first, the lower by downstream, end (6) and/or the second, the upper by downstream, end (7) of each shaped profile (2) section and their cutting at the level of each end of each shaped profile section. The above metal foil (3) is selected so that its surface hardness could be higher than the hardness of the above shaped profile (2). |
|
Method of surface treatment to protect it Substrate material is coated with a layer containing, at least, one metal for producing the applied layer on the substrate material. In order to produce metal protective layer, the applied layer is then treated thermally in recovering environment at pressure below atmospheric level. |
|
Composition of bath for chemical-thermal treatment of friction surfaces of steel items Composition of bath has following ratio of components, wt %: water 38.0-40.0, caustic soda 40.0-43.0, sulphide soda 1.5-2.5, hypo-sulphurous soda 2.0-3.0, sulphurous titanium 7.0-8.0, copper sulphide 2.5-3.5, potassium 3.0-4.0. |
|
|
Heat resistant component contains main part of TiAl of inter-metallic compound having friction surface rubbing against another component and resistant to abrasion coating. Coating is applied on friction surface and is formed by sedimentation in discharge of material of a consumable electrode of metal resistant to abrasion. |
|
Procedure for production of built-up coating on blade body of turbo-machine Strips of alloyed metals are built-up in direction of lengthwise generatrix of blade body ensuring gaps between built-up strips at least on part of blade body and forming layer. As built-up metal there are used alloys on base of nickel with Co, Cr, Al, Mo, W, Ti, Y or their combination. Further, a blade body is mechanically processed ensuring its specified geometry. Successive thermal treatment corresponds to thermo-cycling. |
|
Method of applying cermet coat slurry on turbine stator inner surface Slurry is applied by pouring into stator inner cavity through inlet branch pipe in amount sufficient for complete immersion of guide naves in slurry. Inlet branch pipe is sealed to turn turbine stator about its axis through angle at which inlet branch pipe stays at its bottom position. Then, turbine stator is turned clockwise about axis perpendicular to its axis through angle of inclination to horizon at which slurry does not flows out of turbine stator with inlet branch pipe and guide vanes unsealed. Thereafter, turbine stator is turned about said axis counter clockwise to drain slurry. Now with slurry drained, turbine stator is rotated about its axis with turbine in horizontal position, unless slurry layer water glare disappears. |
|
Method to create surface using discharge Pulse discharge is created between an end surface of an electrode (37) and an end part of a metal plate (11), in order to cause the electrode (37) wear and form a groove (41) in its end surface, shape of which complies with the shape of the end part of the metal plate (11). The relative displacement of the electrode (37) is done in direction perpendicular to the side of the metal plate (11). A pulse discharge is created between the inner side surface of the groove (41) of the electrode (37) and the side surface (11b, 11c) of the end part of the metal plate (11), in order to create an auxiliary coating (43) or (45) at the side (11b, 11c) of the end part of the metal plate (11), and a pulse discharge is created between the lower surface of the groove (41) of the electrode (37) and the upper surface of the end part of the metal plate (11), in order to form a plating layer (47) on the end part of the metal plate (11). |
|
Invention relates to treatment of the surface of a titanium article for orthodontic application, used in form of a prosthetic device or component thereof. The method involves immersing the article to be treated in a suspension containing titanium dioxide nanoparticles while ensuring complete wetting of the article, heating the article in order to remove the solvent and performing a thermal cycle in order to fix the nanoparticles on the treated surface of the article. |
|
|
Tool is positioned in chamber which is vacuumised and is supplied with process gas to working pressure (P). At this pressure there is possible gas break down at minimal strength of electro-magnetic field. Further, positive voltage of bias (U) is supplied on the tool forming electrostatic field around the tool sufficient for maintaining stable generation of plasma and there is generated micro-wave energy to a level of super-high frequency - SHF of power (W) 10-90 Wt. Cutting edges of the tool are subjected to plasma during 1.5-17 minutes (tpr), further, the tool is cooled. Also, during treatment process there is performed control over bias current (I) occurring in a measuring circuit at plasma generation chosen from the range 2÷17 mcA and final lag temperature (T) chosen from the range 10÷230°C. At deviation from the allowed value of bias current (I) the mode of treatment is normalised by changing anode current of a magnetron (Ian). At exceeding the allowed value of final lag temperature (T) treatment of the tool is terminated earlier. |
Another patent 2513130.