Method of manufacturing of part of wear-resistant and antifriction coating
FIELD: machine building.
SUBSTANCE: preliminary a rod is made by pressing and sintering of the composition containing copper powder, PTFE powder and ammonium chloride. To the work surface of the part a composition is applied containing 1…3 wt % of copper chloride in glycerine. Then the rod is put in friction contact with the work surface of the part with sliding speed 0.06…0.09 m/s at longitudinal feed rate 50…80 mcm/rev, pressure 30…50 MPa, and number of passes 4…6. The obtained coating is passivated, then lubricating composition based on soap plastic lubricant comprising copper powder and PTFE powder is applied. At that prior to the lubricating composition application it is preliminary heat treated in inert gas by pressing-through 3…5 times under pressure via the gap between external and internal cages of the heated and installed in series roll bearings.
EFFECT: increased antiwear properties of the coating and antifriction properties upon increased durability of the coating.
The use of
The invention relates to mechanical engineering and can be used for the manufacture of parts with wear resistant and anti-friction coating on the working surfaces of friction units.
The level of technology
A method of producing a wear-resistant coating on the working surfaces by chemical copper plating of their working surfaces (SU, copyright certificate №1579936, IPC C23C 18/38, 1988 ). However, the coating has insufficient durability and wear after this coverage begins intensive wear of the base material of the part.
Known also adopted as the closest analogue of the method of manufacturing parts with wear-resistant and antifriction coating, including prefabrication of the rod of the coating material, bringing it into frictional contact with the working surface in the presence of technological structure, the passivation of the coating subsequently applied to the lubricant composition based on soap grease comprising powders of copper, lead and polytetrafluoroethylene (SU, copyright certificate №1456283, IPC B22F 7/04, 1986 ). The use of this method improves the antiwear and antifriction properties of the coating, however, it has insufficient durability.
Disclosure of the invention
The technical problem of�of bretania is to further increase the anti-wear and anti-friction properties of the coating and increase its durability.
To achieve these objectives in the method of manufacturing parts with wear-resistant and anti-friction coating, comprising the preliminary manufacture of the rod by pressing and sintering a composition comprising 87...92 wt.% of copper powder, 6...10 wt.% powder of polytetrafluoroethylene, 2...3 wt.% ammonium chloride, applying to the working surface of the part composition containing 1...3 wt.% copper chloride in glycerol, the cast rod in frictional contact with the working surface of the part at a sliding velocity of 0.06...0.09 m/s, longitudinal feed 50...80 µm/Rev, a pressure of 30 to 50 MPa and the number of passes 4 6..., passivation of the coating subsequently applied to the lubricant composition based on soap grease comprising from 10 to 15 wt.% of copper powder and 2...5 wt.% the polytetrafluoroethylene powder according to the invention before applying the lubricating composition to pre-thermoablative in the atmosphere of inert gas by forcing 3...5 times under pressure N=(0,01 0,07...) MPa with a flow rate G=(0,01 0,20...) kg/min through the gap between the outer and inner cages are heated to a temperature of t°=(0,5...0,7)t°Kconsecutive rolling bearings, the number of which is n=7...9, rotating with frequency W=(0,01 0,03...) WEXTto which is applied a pressure P=n(0,60 0,06...) QEXTwhere QEXT- the maximum allowable static load�and one bearing, t°K- temperature dropping point of lubricating compositions, WEXT- the maximum allowable rotational speed of the bearings.
Management of some technological processes in the atmosphere of inert gas in itself known. However, none of the known methods for the heat treatment of the lubricating composition, used to produce wear-resistant and antifriction coating is not carried out in an inert gas atmosphere, i.e., in the proposed method, this sign shows the new property - extends the range of application of the known method.
The known applicant sources some General properties of signs "heated to a temperature of t°=(0,5...0,7)t°Kand rotating with frequency W=(0,01 0,03...) Wsupplementary.to which is applied a pressure P=n(0,60 0,06...) QEXT"known, for example, from the patent SU # 1196552, IPC F16C 33/66, 1984 , in which during the processing of a bearing prior to operation between the working surfaces of the bearing inject grease composition, the bearing rotates with frequency W1=(0,01 0,03...) WEXTwithin 12...20 min, heated to a temperature of t°=(0,5...0,7)t°Kthen increase the speed to W2=(0,07 0,05...) Wsupplementary.and rotates with the frequency within 5...8 min is applied to the bearing pressure P=(0,60 0,06...) QEXTand rotate under these conditions for 2...3 hours. The proposed� the way this sign shows the new property - extends the range of application of the known method.
The use of signs "by forcing 3...5 times under pressure N=(0,01 0,07...) MPa with a flow rate G=(0,01 0,20...) kg/min, through the gap between the outer and inner cages and placed one rolling bearing, the number of which is n=7...9" other methods of obtaining anti-friction and wear-resistant coating according to published sources unknown.
Based on the above analysis, the claimed technical solution meets the criterion of "inventive step".
The applicant first identified in his research that after the proposed action lubricating composition it formed activated particles of the additive, the presence of which greatly intensifies the process of cladding by them rubbing surfaces of details of machines. This improves the antiwear and antifriction properties of the coating and increases its durability.
Detailed description of the invention
The method is as follows. At first produce a terminal by pressing and sintering a composition comprising 87...92 wt.% of copper powder, 6...10 wt.% powder of polytetrafluoroethylene and 2...3 wt.% ammonium chloride. On the working surface of the part is applied in a composition containing 1...3 wt.% copper chloride in glycerol and lead rod in frictional contact with the working �overhasty items at a sliding velocity of 0.06...0.09 m/s, longitudinal feed 50...80 µm/Rev, a pressure of 30 to 50 MPa and the number of passes 4 6..., after which the resulting coating passivate. The rubbing surface can be accomplished using a fixture, comprising a housing with a spring loaded retainer rod. The fixture is mounted, for example, in a tool holder of a lathe and the workpiece in the Chuck of the machine.
Then thermoablative lubricating composition. To do this, after pre-mixing soap grease with powders of copper and PTFE lubricant composition in the atmosphere of inert gas is forced 3...5 times under pressure N=(0,01 0,07...) MPa with a flow rate G=(0,01 0,20...) kg/min through the gap between the outer and inner cages (n=7...9 consecutive heated to a temperature t°=(0,5...0,7)t°Krolling bearings, rotating with frequency W=(0,01 0,03...) WEXTto which is applied a pressure P=n(0,60 0,06...) QEXTwhere t°K- temperature dropping point of lubricating compositions, WEXT- the maximum allowable rotational speed bearings, QEXT- the maximum allowable static load on one bearing.
Heat-treated lubricating composition is applied to the working surface of parts and assemble them in the friction node.
The practical application of the proposed method is illustrated by the following examples, which are the working surfaces of parts of the friction node processed by the proposed method and the method prototype , and also the ways in which the parameters of the operations were within the claimed limits.
Tribological test samples were determined on the test stand hinges on a "shaft-bushing". On shafts of steel ZOGGS struck glycerol containing 2 wt.% copper chloride, then rubbed them with a rod containing to 89.5 wt.% copper, 8 wt.% polytetrafluoroethylene (PTFE) and 2.5 wt.% ammonium chloride, at a pressure on the rod 40 MPa, sliding velocity of 0.08 m/s with a longitudinal feed 50...80 µm/Rev. for 5 passes. After coating the shafts were passivehouse in warmed up to 25°C a 0.5% solution of caustic soda. Bushings made of bronze Brams 10-3-1,5. A lubricating composition based on soap grease ciatim-201, containing 12 wt.% powder of copper and 3 wt.% powder of polytetrafluoroethylene, thermoablative on methods whose parameters are given in table 1 and were applied to the working surface of the shafts. For the test, the shaft is made reciprocating rotary motion with an amplitude of 15 mm and a frequency of 2 Hz. The specific pressure was 90 MPa, the base test 2 kilometers of friction. During the tests we measured the friction torque, and after testing, the wear rate of the bushing.
Testing the durability of the coating was carried out under the same conditions. Determined the way of friction to the bully, i.e. a sharp increase of the friction coefficient.
The results of tribological�such tests are also given in table 1. Notation: example 1 - treatment by the method-prototype , 2 and 6 - processing methods, the values of the parameters of the operations are less than (2) and (6) declared, 3, 4, 5 - treatment by the inventive method, the parameters of which lie on the bottom (3) and upper (5) declared the border and in the center (4) between the lower and upper bounds. Each value of intensity of wear process, are shown in table 1 obtained by calculating the arithmetic averages of the results 4...5 experiments.
|The conditions of implementation of the technical solution and the results of tribological tests|
|Name||The number of the example method|
|Supply of inert gas into the chamber for processing||-||-||+||+||+||+|
|Bearing heating to temperatures� t°/t° K||-||0,4||0,5||0,6||0,7||0,8|
|Aligning bearings in rotation with frequency W/WEXT||-||0,005||0,01||0,02||0,03||0,04|
|Punching lubricating composition under pressure N, MPa||-||0,0005||0,01||0,04||0,07||0,10|
|with the consumption of G, kg/min||-||0,0005||0,01||0,1||0,20||0,30|
|Annex to the bearing pressure, P/nQEXT||-||0,01||0,06||0,33||0,60||0,93|
|Extrusion through the number of bearings n, NJ)||-||6||7||8||9||11|
|The number of times of hammering of the party||-||2||3||4||5||6|
|The wear rate of the bushing, mg/km||21,9||21,1||19,0||18,3||19,1||20,6|
|Coefficient of friction||0,12||0,12||0,10||0,09||0,10||0,12|
|The way of friction to the bully, km||2,6||2,7||4,2||5,5||4,2||2,8|
Thus, in accordance with the results of tribological tests, the use of the claimed method in comparison with the prototype  improves the antiwear properties of the coating 15...20%, and anti-friction properties� 20...33% while increasing its durability in 1.6...2.1 times.
Method of manufacturing parts with wear-resistant and anti-friction coating, comprising: obtaining a terminal by pressing and sintering of his next composition containing, in wt.%: 87 92...of copper powder, 6...10 powder polytetrafluoroethylene, 2...3 ammonium chloride, applying to the working surface of the part composition containing 1...3 wt.% copper chloride in glycerol, the cast rod in frictional contact with the working surface of the part at a sliding velocity of 0.06...0.09 m/s for longitudinal feed 50...80 µm/Rev, a pressure of 30 to 50 MPa and the number of passes 4 6..., passivation of the coating with subsequent application of lubricating compositions based soap grease containing, in wt.%: 10...15 of copper powder and 2...5 powder of polytetrafluoroethylene, characterized in that before applying the lubricating composition to pre-thermoablative in the atmosphere of inert gas by forcing 3...5 times under pressure N=(0,01 0,07...) MPa with a flow rate G=(0,01 0,20...) kg/min through the gap between the outer and inner cages are heated to a temperature of t°=(0,5...0,7)t°Kconsecutive rolling bearing, the number of which is n=7...9, rotating with frequency W=(0,01 0,03...) WEXTto which is applied a pressure P=n(0,60 0,06...) QEXTwhere QEXT- the maximum allowable static load on one bearing, t°K- temp�tour dropping point of lubricating compositions, WEXT- the maximum allowable rotational speed of the bearings.
FIELD: machine building.
SUBSTANCE: friction surface (1) of part (2) has regular relief in form of cavities (3) acting as lubricating tanks for the surface applied lubricant (4). Surface of cavities (3) is covered with layer of the material (5) having lower adhesion properties in relation to the used lubricant (4) in comparison with the friction surface (1).
EFFECT: higher efficiency of lubrication.
FIELD: wood working industry.
SUBSTANCE: plain bearing is made from compressed impregnated wood with a radial arrangement of fibres and uniform density along the whole section and contains greasing in amount 7-8% from the wood mass, and metal inclusion. The wood of the bearing contains nano-crystalline cellulose in the amount 0.5-0.8% from the wood mass, and the metal inclusion is implemented as a continuous nickel film in amount 4-6% from the wood mass with the width 0.8 mcm, covering internal surface of wood completely. The method of manufacture of the named plain bearing is also offered which comprises the manufacture of segments (4) of compressed impregnated wood with a radial arrangement of fibres and radiuses of rounding of the future bearing, application of glue, installation into auxiliary cartridge clip (1), pressing through a cone (2) with a cone angle (2), allowing to increase a density up to the value 1350 kg/m3 minimum, glue solidification and, if necessary, machining job along an internal diameter with a minimum rough tolerance.
EFFECT: improvement of quality of a plain bearing and decrease of manufacture complexity.
2 cl, 6 dwg, 1 tbl
SUBSTANCE: invention relates to application of CuFe2P in sleeve bearing or as material of sleeve bearing, with CuFe2P representing copper alloy, which contains 2.1-2.6 wt % Fe, 0.05-0.2 wt % Zn 0.015-0.15 wt % P, to 0.03 wt % Pb and to 0.2% of other additives. Invention additionally relates to composite material (1) of sleeve bearing, which contains support layer (2) and bearing metal layer (3) based on CuFe2P with Fe2P particles formed on it (4).
EFFECT: creation of sleeve bearing material, which has advantages of copper-based materials, in which it is possible to refuse from application of lead and which has good workability and excludes bearing cramping, in addition, material of sleeve bearing was easily produced and applied on usual support layers, with application of CuFe2P resulting in sleeve bearings with high heat conductivity and good mechanic properties.
11 cl, 2 dwg, 2 tbl, 2 ex
FIELD: engines and pumps.
SUBSTANCE: set of inventions relates to ICE sliding parts. Proposed part comprises substrate with coating thermally deposited thereon and exposed contact surface including at least two different-strength two-phase-material coating. Note here that at least one of coating phases of lower strength is recessed relative to the other coating phase. Making of the part includes preparation of substrate, thermal deposition of coating with exposed contact surface to recess at least one of material phases relative to the other phase. Note also that lower-strength coating material is recessed.
EFFECT: optimum tribological properties.
20 cl, 1 dwg, 1 ex
FIELD: machine building.
SUBSTANCE: sleeve is made from composite polymer anti-friction material on the basis of polyamide containing carbon fibre or a mixture of carbon fibre with glass fibre as a fibrous filler. In addition, the material contains chaotic carbon nanotubes in the form of single-layer, multi-layer graphite planes with the number of layers of 2 to 70 or inserted into each other and bent into a tube; outside diameter of carbon nanotubes is 0.1 to 100 nm, and their length is 1 to 70 mcm. As a base, the material also contains polyamide mixture with 20-40 wt % of polyethylene caproamide. As material base polyamide, there used is polyamide 6, or Kaprolon B or Ertalon; content of fibre glass in its mixture with carbon fibre of fibrous filler of composite polymer anti-friction material is 3.48 to 10.5 wt % at the following component ratio, wt %: carbon fibre or a mixture of carbon fibre and fibre glass 9.7-42.4; carbon nanotubes 0.05-0.55; polyamide is the rest - up to 100%.
EFFECT: increasing sleeve service life due to considerable reduction of intensity of linear wear of a working layer of sliding at friction on polished steel pair from steel 40X, increasing stability of friction coefficient at friction on the material of counter body from steel 40X, and improving breaking stress at tension, preserving Charpy impact strength on specimens without any notch at simultaneous maintenance of the specified limit of compressive strength, as well as low friction coefficient at increase of its stability.
4 cl, 2 tbl
FIELD: process engineering.
SUBSTANCE: invention relates to powder metallurgy, particularly, to production of wear-proof antifriction self-lubricating alloy with larger amount of alloy. Pulverised powders of Al-40Sn-composition are pelletised and sintered in inert atmosphere at 590-615°C for 90-30 min. Sintered pellet is subjected to equal-channel angular extrusion at invariable position of deformation plane.
EFFECT: high mechanical and tribotechnical properties at steel friction in the absence of lubrication.
FIELD: machine building.
SUBSTANCE: sleeve is made from composite polymer antifriction polyamide-based material containing a mixture of carbon fibre and glass fibre, as well as a powder filler as a fibrous filler. As a material base, it contains polycaproamide or mixture of polycaproamide with 20-40 wt % of polyethylene caproamide. As carbon fibre, the material contains carbon fibre obtained from high-molecular hydrocellulose fibre; content of glass fibre in the mixture is 3.48 to 10.5 wt %. As powder filler, the material contains colloid-graphite solution with particle sizes of 400 to 4000 nm, or silicon oxide in the form of marshalite or colloidal silica with particle sizes of 400 to 8000 nm. Sleeve material contains components in the following ratio, wt %: mixture of carbon fibre and glass fibre 28.5-43.0; powder filler 1.4-3.2; mineral oil 1.0-2.0; polymer matrix is the rest (up to 100%).
EFFECT: increasing sleeve service life due to considerable reduction of intensity of linear wear of a working layer of sliding at friction on polished steel pair from steel 40X, increasing stability of friction coefficient at friction on the material of counter body steel 40X, and improving Charpy impact strength on specimens without any notch at simultaneous maintenance of low friction coefficient and the specified limit of compressive strength.
6 cl, 2 tbl
FIELD: machine building.
SUBSTANCE: proposed antifriction coating comprises molybdenum disulphide and binder. Said binder represents organic silicon compound. Diamond nanoparticles are additionally introduced in coating composition.
EFFECT: higher operating temperatures and wear resistance.
5 cl, 1 ex
FIELD: machine building.
SUBSTANCE: method for manufacturing anti-friction layer of sleeve half-bearing consists in oversized boring after sleeve casting and its plastic deformation. Plastic deformation is made within the range of recrystallisation temperature of matrix alloy phase, but not exceeding the temperature of melting of disperse phases at average speed of deformation 10-2≤ε≤10 s-1. Deformation is made in several transitions with changing of direction by transitions to opposite one. Deformation is done by tool, the material, thermal processing and roughness of which corresponds to the material of shaft neck joined with the bearing.
EFFECT: increase of product wear-resistance due to creation of small grain structure of top layer, provision of positive gradient of mechanical properties by depth, reduction of surface roughness due to smoothing microroughnesses by breaking-in roller and reduction of material wearing-in period.
3 cl, 1 tbl, 1 ex
SUBSTANCE: invention relates to use of a composition for making at least one component of a car adjusting device. The composition contains partially crystalline, partially aromatic polyamide and is modified by at least one elastomer with weight ratio from 1% to 10% of the composition. The composition is used to make an adjusting device for changing the position of the controlled car component, having at least one gear wheel of a drive mechanism, one guide element and/or one sliding element.
EFFECT: invention enables to use the composition to make at least one component of an adjusting device and an adjusting device without considerable expenses with mechanical properties sufficient for operation.
14 cl, 7 dwg, 2 tbl, 2 ex
FIELD: metallurgy industry.
SUBSTANCE: invention relates to the field of protecting metals against corrosion, in particular structural elements that are exposed to sea water and/or hydraulic structural components. A corrosion-resistant coating has corrosion resistance that meets the standard ASTM G48, the method A, and consists of the first inner layer and the second outer layer deposited on the first layer, and the second outer layer is a layer of a metal-nickel alloy, where the metal is selected from the group consisting of tin, copper, iron, tungsten and cobalt or an alloy of these metals, and the first inner layer is a bronze alloy or a layer of a metal from the group consisting of molybdenum, niobium, cobalt, vanadium, manganese, titanium, and magnesium or an alloy of these metals. The method comprises the deposition of the first inner layer on the surface of the substrate, and the deposition of the second outer layer on the first layer, and as the second outer layer a layer of a metal-nickel alloy is deposited, where the metal is selected from the group consisting of tin, copper, iron, tungsten and cobalt or an alloy of these metals, and as the first inner layer a layer of bronze alloy is deposited or a metal layer of the group consisting of molybdenum, niobium, cobalt, vanadium, manganese, titanium, magnesium or an alloy of these metals.
EFFECT: improved mechanical strength and corrosion resistance of the coating.
SUBSTANCE: method contains the following stages: a) physical processing to reduce the surface tension of a substrate before metallisation; b) non-electrolytic metallisation of the substrate surface, processed at stage a) by sputtering one or several redox solutions in the form of aerosol(s), and c) production of a decorative layer on the metallised surface. A device contains a module of physical processing, selected from the following types of processing: processing by flame, processing by crown discharge, processing by plasma and their combinations, to reduce the surface tension, a module of non-electric metallisation and a module of a decorative layer production. The claimed method is used to obtain such products as: vials from hollow glass, in particular, for cosmetic purposes, automobile components, components for household electronics or for the application in aviation, or components for electronics in the form of an electricity-conducting path, antennas of radio-frequency identification or a component with an electromagnetic coating for screening.
EFFECT: invention makes it possible to process a lot of substrates, provides quality adhesion of layers and makes it possible to obtain decorative coatings.
10 cl, 4 dwg, 4 ex
SUBSTANCE: electrodeposited layer of an iron-chromium coating undergoes carbonitriding for 1-4 hours at 600-650°C using a paste of the following composition, wt %: potassium ferrocyanide 40, sodium carbonate 10, calcium carbonate 5, soot 45.
EFFECT: high microhardness and wear resistance of steel components.
SUBSTANCE: invention relates to composite materials, particularly carbon-carbon composite material, and can be used in making liquid-propellant engines. The carbon-carbon composite material with a protective silicon carbide coating has a sealing layer. The protective coating is coated with a sealing layer of nickel, niobium or molybdenum metal.
EFFECT: high durability and reliability of the obtained material.
SUBSTANCE: method for application of heat-protective and conductive coating on carbon fibres and fabrics includes plasma spraying of cermet compound in the form of mechanical powder blend containing 5-15 wt % of nichrome, 15-5 wt % of zirconium dioxide, 70 wt % of aluminium, 10 wt % of aluminium-nickel, and 4-7 wt % of yttrium oxide as stabilising agent for zirconium dioxide.
EFFECT: improving electric conductivity, heat resistance of carbon fibres and fabrics with maintenance of high capacity values.
3 dwg, 1 tbl, 1 ex
SUBSTANCE: invention can be used at production of heat-resistant and antifriction coatings on a part from carbon and alloy steels working under conditions of increased temperatures of up to 1600°C and dry friction. The coating is formed on steel parts by application of an aluminium layer by means of a liquid-phase method and performance of a diffusion annealing. Prior to application of the aluminium layer, a steel part is nickel-plated; after that, the aluminium layer of the technically pure aluminium melt is applied at the temperature of 800-850°C during 3-4 seconds, and diffusion annealing is performed at the temperature of 950-1100°C during 6-10 hours.
EFFECT: method allows improving productivity and reducing cost of coating application.
FIELD: process engineering.
SUBSTANCE: invention relates to structural element. Proposed structural element has catalytic surface 12. Note here that said catalytic surface consists of metallic surface sections 14 and surface components 13 of MnO2 in contact with the former. Note also that portion of said surface components 13 of MnO2 with respect to the sum of metallic surface components and surface components 13 of MnO2 varies from 10% to 60%. Invention covers also the method of making catalytic surface 12 of structural element. Besides, it covers application of structural element for decreasing ozone content in gas flowing over catalyst surface.
EFFECT: higher catalytic activity.
20 cl, 6 dwg
SUBSTANCE: method of manufacturing a matrix to produce a microstructure relief on the surface of a light-diffusing panel includes creation of a model of the surface with preset microstructure relief by applying an adhesive on a sheet of acid-resistant material, placing over it a layer of a mixture made of fractions of hard crystalline rocks, applying a metallic coating to create an electrical contact with subsequent formation of galvanic metallic sediment, which is separated from the model and the metal matrix with a preset microsructure relief is shaped. The method of producing a microstructure relief on the surface of a light-diffusing panel is characterised by the fact that the surface of the light-diffusing panel with a microstructure relief is formed by die casting and a casting mould is used to place a matrix containing on its surface a copy of the preset microstructure relief produced by the above method.
EFFECT: creation of a cost-effective method to produce a surface relief of the light-diffusing panel from optically transparent polymer with a size of irregularities 500-50000 nm.
SUBSTANCE: device consists of heating chamber with external heaters wherein there is located bath with metal solution. A sluice chamber is located at the same level with the heating chamber. Above the heating and sluice chambers there is located a manipulation chamber connecting the heating and sluice chambers. In the manipulation chamber there are arranged a rotor device of transfer of coated items, loading-unloading device whereon there are fixed coated items, heat-protecting screens and sealing water-cooled disks ensuring sluice chamber sealing.
EFFECT: reduced power expenditures, automation of coating application and thermal treatment, raised quality of applied coating, raised reliability and service life of device, increased weight and dimensions of treated items.
6 cl, 2 dwg
FIELD: engineering industry.
SUBSTANCE: invention deals with engineering industry technology, namely with methods of anti-friction strengthening treatment of inner cylinder surfaces. Process tool with anti-friction bars and deforming elements is rotated and moved reciprocating. Coating application on part surface is performed by its rubbing with anti-friction bars and part surface deformation with coating by deforming elements in a form of balls and rollers. Coating application is performed with the help of suspension composed of fine powder and binding agent. Suspension is supplied by channels of process tool simultaneously with the beginning of deforming element operation. Deforming element radius is 1.5…2.0 mm. Hold down pressure of deforming elements towards processed surface is 160…500N. Rotation velocity of process tool is 20…40 m/min. Reciprocating movement speed of process tool is 10…20 m/min. Hold down pressure of anti-friction bars towards treated surface is 160…500N.
EFFECT: improvement of micro-hardness, increase of residual compressive stress and increase of processed part wearing resistance.
3 cl, 3 dwg, 1 tbl, 1 ex
SUBSTANCE: this process comprises mechanical alloying of the aluminium-based charge by carbon at high-power mill, forming the blank and its hot processing by pressure. Said aluminium-based charge is produced by mechanical and chemical activation of PA-4 aluminium powder along with 18 wt % of silicon powder for 1 hour in saturated water solution of orthoboric acid. Hot processing of billet by pressure is performed at compaction by 17-70 MJ/m3.
EFFECT: hardness and mechanical properties sufficient for production of ICE cylinder liners.