Material of sleeve bearing
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
The technical field
The present invention relates to lead-free material sliding bearing with a matrix based on CuFe2P. The invention additionally relates to a composite material of a sliding bearing with a steel support layer and bearing layer of such material sliding bearing CuFe2P, and anti-friction element on the basis of CuFe2P.
The level of technology
Lead-free sintered materials bearings of copper-based, especially on the basis of the bronze matrix, well known for its good thermal conductivity and its high wear and corrosion resistance as compared with the same lead-containing materials. In developing these materials was the desire to replace lead-containing materials bearings, because lead is classified as a pollutant harmful to the environment. Lead material bearings has the function of a solid lubricant. It is therefore necessary to find a replacement for this solid lubricant. Otherwise single-phase bronze material can have, for example, increased sensitivity to the clutch in the friction conditions with mixing. With this purpose in the literature and in practice has been found and proposed to use a number of different compositions.
For example, EP 0962541 A1 describes antifriction material based on copper, to the torus in the matrix of the sintered copper or sintered copper alloy dispersed particles of AlN, Al2O3NiB, Fe2B, SiC, TiC, WC, Si3N4, Fe3P, Fe2P and/or Fe3B. To obtain this antifriction material powder of copper or copper alloy is mixed with, for example, AlN particles (Hv: 1300, a particle diameter of, for example, 0.5 μm) and Fe3P (Hv: 800, particle diameter, for example, 5 μm) and the mixture is sintered. In the mixture and in anti-friction material mass fraction and average particle diameter with an average hardness (Hv) 500-1000 (i.e. Fe3P, Fe2P and/or Fe3B) are chosen so that they were more than mass fraction and the average diameter of the particles with high hardness (Hv) of 1100 or more (i.e. AlN, Al2O3NiB, Fe2B, SiC, TiC, WC and/or Si3N4).
Other anti-friction material based on copper are described in WO 2008/140100. It contains 1.0 to 15 wt.% Sn, 0.5 to 15 wt.% Bi and 0.05-5 wt.% Ag, and Ag and Bi are present in the eutectic state. If necessary, anti-friction material may contain 1-10 wt.% particles of Fe3P, Fe2P, FeB, NiB and/or AlN with an average diameter of grains of 1.5 to 70 microns.
In contrast, CuFe2P mainly used so far in the electronics industry (for example, as a contact material) and as a heat exchange material. US 2009/0010797, for example, describes a plate for electronic components of the alloy Cu-Fe-P, containing 0.01 to 3 wt.% Fe, 0.01 to 0.3 wt.% R and has a special orientation. CuFe2P as a suitable copper alloy. US 2006/0091792 describes sprayed targets for flat screens from special alloys Cu-Fe-R.
The basis of the present invention have the task to provide the material of the sliding bearing, which has the advantages of materials based on copper and in which you can refuse the use of lead. The material of the bearing must have good machinability and prevent jamming of the bearing. In addition, it is desirable that the material of the sliding bearing is easily produced and deposited on a regular anchor layers.
It has been unexpectedly discovered that the use of CuFe2P leads to the bearings with high conductivity and good mechanical properties.
Therefore, the present invention relates to the use of CuFe2P for the bearings or as material bearings. The invention additionally relates to a composite material of the sliding bearing and the sliding bearing, containing the above-mentioned material of the sliding bearing.
Brief description of drawings
Figure 1 shows polarographic with the material of the sliding bearing according to the invention.
Figure 2 shows an enlarged section of polupudrenka with Figure 1.
Detailed description of the invention
CuFe2P (CW107C; S) represents a copper alloy, which is according to the specification DIN EN contains 2.1-2.6 wt.% Fe, 0.05 to 0.2 wt.% Zn, of 0.015 to 0.15 wt.% P, up to 0.03 wt.% Pb and up to 0.2 wt.% other additives. Suitable for the purposes of the present invention the alloy is available under the designation Wieland-K65®and has the following composition (approximate values):
Specific heat CuFe2P is (see information on CuFe2P German copper Institute):
|Temperature [°C]||Specific heat capacity [j/(g·K)]|
According to the invention CuFe2P used as a material of a sliding bearing.
In the preparation of the material of the sliding bearing according to the invention CuFe2P preferably is sintered or cast. Spokanepremature performed at a temperature of 950-980°C.
During preparation of the material of the sliding bearing according to the invention of CuFe2P by sintering and/or casting solids Fe2P, which are present in the matrix. In contrast to the information ER 0962541 A1, they do not need to implement with the help of special stages. These solid particles lead to high resistance to abrasion. They are also useful as chip breakers, which helps to improve the machinability of the material, for example, when drilling the bearing. Present particles of Fe2P lead to a good polishing properties of moving in the opposite direction of the element and thus prevent jamming of the sliding bearing and the possible transfer material bearing on moving in the opposite direction of the element and the associated adhesion of the bearing to that element.
Another advantage of the material of the sliding bearing according to the invention is its high thermal conductivity, which is, for example, two times higher than that of cast CuNi2Si, which is often used in bearings. Compared with the conventional sintered materials, such as, for example, CuSn8Ni, CuSn10Bi3,5 and CuPb23Sn3, thermal conductivity is even higher, up to 5 times. This leads to good drainage formed in the bearing friction heat and, therefore, less likelihood of overheating followed by the facilities of material bearing upon the conditions of friction with mixing. Good drainage formed in the bearing heat also eliminates thermal influence is present in the bearing oil, which can lead to changes in viscosity and behavior grease.
Thanks to the combination of high thermal conductivity and polishing action due to particulate Fe2P can be particularly effectively prevented the seizure of the bearing, as both effects reduce the adhesion of the material of the sliding bearing to moving in the opposite direction to the element. This effect may be preferred implementation of the invention is even more enhanced by introducing additional solid particles.
Suitable solid particles include, for example, particles of AlN, Al2O3NiB, Fe2B, SiC, TiC, WC, W2C, Mo2C, c-BN, MoSi2Si3N4, Fe3P, Fe2P, Fe3B, TiO2and ZrO2.
In another preferred implementation, the material of the sliding bearing according to the invention additionally contains an even and solid lubricant, such as, for example, h-BN or graphite. By adding the solid lubricant reduces the coefficient of friction and therefore heat in the bearing. If the solid lubricant use h-BN can be used, for example, particles described in DE 102007033902 B3, the content of which is incorporated here by reference.
From Britanie additionally relates to a composite material of a sliding bearing. Fig. 1 and 2 show polarographic (1) composite sliding bearing according to the invention, which includes a support layer (2), preferably of steel, and the above-described material of the sliding bearing (3) on the basis of CuFe2P with formed therein particles of Fe2P (4) in the form of a bearing metal layer. The thickness of the bearing metal layer is preferably 0.1 to 1.0 mm, particularly preferably 0.3 to 0.5 mm.
Preferably, the bearing metal layer of the above material, the sliding bearing is an antifriction layer with a thickness of 7-20 μm. Particularly preferably, the anti-friction layer is break-layer with a thickness of 1-10 μm. Such anti-friction layers and break-layers are well known to the expert and are typically used in bearings.
In another aspect, the present invention relates to a sliding bearing, containing this composite material bearings.
For preparation of the material of the sliding bearing powder CuFe2P was applied on a steel support layer and the first step was to specaly at 950-980°C. Then the material was compactional (condensed) by stage of rolling, so got a porosity value below 0.5%. Then for healing sintered layer specification is the W was repeated at 950-980°C and through the second stage of rolling hardness of the layer is brought up to 90-150 HBW 1/5/30, and porosity up to values of less than 0.3%.
For preparation of the material of the sliding bearing was heated CuFe2P above its melting point in 1089°C and melted. Then the melt with a temperature of 1150-1250°C was poured on a steel support layer.
After that, the surface layer can be smoothed well-known specialist way by means of mechanical processing and, if necessary, brought to the desired hardness by means of one or more stage(s) rolling.
1. The use of CuFe2P slide bearing, and CuFe2P is a copper alloy containing 2.1 to 2.6 wt.% Fe, 0.05 to 0.2 wt.% Zn, of 0.015 to 0.15 wt.% P, up to 0.03 wt.% Pb and up to 0.2 wt.% other additives.
2. The use of CuFe2P as the material of the sliding bearing, and CuFe2P is a copper alloy containing 2.1 to 2.6 wt.% Fe, 0.05 to 0.2 wt.% Zn, of 0.015 to 0.15 wt.% P, up to 0.03 wt.% Pb and up to 0.2 wt.% other additives.
3. The use according to any one of paragraphs. 1 and 2, and CuFe2P used in the form of a cast material.
4. The use according to any one of paragraphs. 1 and 2, and CuFe2P used in the form of sintered material.
5. Application under item 4, and CuFe2P is sintered at a temperature of 950-980°C.
6. The use according to any one of paragraphs. 1 and 2, and the material on the basis of CuFe2P introduced solids.
7. Application under item 6, and entered particles of AlN, Al2O3NiB, Fe2B, SiC, TiC, WC, W2C, Mo2C, c-BN, MoSi2Si3N4, Fe3P, Fe2P, Fe3B, TiO2and ZrO2.
8. The use according to any one of paragraphs. 1 and 2, and the material introduced solid lubricant.
9. Application under item 8, and as a solid lubricant use h-BN or graphite.
10. Composite material (1) sliding bearing containing support layer (2), preferably of steel, and the bearing metal layer (3) of the material of the sliding bearing according to any one of paragraphs. 2-9.
11. The anti-friction element or the bearing containing composite sliding bearing on p. 10.
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: machine building.
SUBSTANCE: sliding element with a pre-shaped substrate and galvanically applied anti-friction layer, formed of an alloy of tin, antimony and copper, whose content is in wt %: 5-20% antimony, copper 0.5-20% and the rest is tin, and lead content <0.7%, and the full content of other components is <0.5%, and in the layer of sliding bearing the tin crystals are of predominantly globular shape. Method of receiving a sliding element is that the electrolytic deposition of antifriction layer of an alloy with the components of tin, antimony and copper is carried out, and an electrolyte as a wetting agent preferably contains C13C15-oxo-alcohol, C16C18-fatty alcohol C18-oxo-alcohol with degree of ethoxylation from 10 to 30. The composition and deposition rate are adjusted by addition of auxiliary substances with large molecules, resulting in increased anti-friction layer and emerging of crystals of tin of a globular shape.
EFFECT: creation of the layer for a sliding bearing with improved operating characteristics.
10 cl, 1 ex
SUBSTANCE: method for producing aluminium-lead friction bearings is that preliminary the workpieces are produced out of porous aluminium with open porosity by the known technologies of casting into reusable moulds. Then the pores are filled with molten lead while a workpiece is located in the same mould. The result is a product with uniform content of lead along the cross-section of the product and the size of lead inclusions is equal to the size of pores in the porous aluminium.
EFFECT: improved quality of aluminium-lead bearings and reduced complexity of their production.
SUBSTANCE: thin-layer ceramic coating with the friction surface, formed with the ability to absorb grease with fibrous crystals alpha-Al2O3, characterised by the ability to layering with formation of longitudinal cracks with transverse size of ~ 1 nm and more due to longitudinal defects in the crystal lattice. A method of producing coating with the friction surface involves microarc oxidation of a part in the anode-cathode mode at a ratio of values of Ic/Ia = 1.0 - 1.15 for 90 -240 minutes consecutively in two electrolytes, and microarc oxidation in the second electrolyte is carried out with periodic pulsations of the anodic and cathodic current by 30% - 50% of the DC current mode for formation of longitudinal crystal lattice defects of fibrous crystals alpha-Al2O3.
EFFECT: increased bearing capacity of the thin-layer ceramic coating and the friction surface made on its base, by increasing damping of the mechanical effects on the surface in the pairs of friction formed on its basis.
SUBSTANCE: proposed composition contains the following substances, in wt %: copper particles - 20-85, titanium hydride particles - 1-10, graphite particles making the rest. To make material billet, this charge is sintered by feeding electric current pulses there through, current density making 200-500 A/mm2, with simultaneous single-axis reduction.
EFFECT: high-density material, required resistivity, reliable wetability of graphite particles by copper.
6 cl, 1 tbl
SUBSTANCE: from copper and niobium powders they prepare charge, cold pressing and sintering is carried out. Cadmium is added to a stock by diffusion saturation by means of its soaking in atmosphere, containing cadmium vapours. The sintered stock is exposed to deep treatment with pressure, which is combined with hot extrusion and subsequent cold rolling or drawing. Afterwards additional pressing and annealing is carried out.
EFFECT: reduced transition resistance in a contact pair, increased electric erosion resistance, higher durable mechanical strength in modes of multi-cycle impact loads and resistance against welding.
SUBSTANCE: copper alloys is produced at adding hexagonal-system graphite to high-temperature medium at 1200-1250°C in amount sufficient for obtaining the copper alloy with carbon content of 0.01-0.6 wt %.
EFFECT: lower electric resistance and higher tensile strength.
8 cl, 5 dwg
SUBSTANCE: copper-based alloy contains the following components, wt %: copper 50.0-54.0; silver 20.0-25.0; gold 2.0-3.0; gallium 10.0-13.0; stannum 10.0-13.0.
EFFECT: enlarging the range of copper-based alloys used in jewellery industry.
SUBSTANCE: copper-based alloy contains the following components, wt %: copper 68.2-70.2; silver 20.0-25.0; indium 0.3-0.5; gallium 6.0-9.0; stannum 0.3-0.5.
EFFECT: enlarging the range of copper-based alloys used for production of jewellery.
SUBSTANCE: invention relates to production of ultrafine materials that feature higher strength and electric conductivity and may be used in electrical engineering for making components, conductors and terminals operated at increased temperatures and mechanical loads. Said ultrafine material comprises reinforcing phase fractions with mean disperse particle size smaller than 20 nm, while mean grain size in alloy structure is smaller than 500 nm. Note here that quantity of grains with high-angular boundaries exceeds 60%. Proposed method comprises heating, quenching, forming and ageing. Note here that quenching is performed at 1020-1050°C. Thereafter, intensive plastic deformation is performed at 20-300°C with cumulative strain number making, at last, 3. Now, ageing is carried out at 400-500°C.
EFFECT: limit strength exceeding 550 MPa, higher conductivity and thermal stability.
3 cl, 3 ex, 6 tbl, 6 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to soldering, particularly, to development of solder optimum shape, release and composition used in soldering tungsten and its alloys with copper and its alloys, for example, energy-intensive assemblies on nuclear power engineering. Proposed solder represents a flexible tape with amorphous structure from copper-based alloy containing in wt %: titanium - 25-31, beryllium - 0.1-3, copper making the rest. Said flexible tape features width of 10-40 mm and thickness of 40-50 mcm and unlimited length. It is made by superfast quenching at the rate of 104-106 deg. C/s to produce amorphous structure of alloy.
EFFECT: higher quality and thermo mechanical properties.
4 cl, 3 tbl, 10 dwg
SUBSTANCE: copper powder is subject to action of high-frequency plasma of reduced pressure by introducing it to plasma jet at pressure of 1.33 - 133 Pa. Plasma-forming gas consists of argon and air. Its action on powder is performed at voltage of 7.8-8.0 kW, current force of 1.3-1.5 A and at copper powder flow rate of 0.08-0.1 g/sec. Obtained powder is mixed with zinc stearate, workpieces are pressed, loaded to shaft furnace and sintered in dissociated ammonia environment. Cooling is carried out in the air in dissociated ammonia environment.
EFFECT: improvement of the method.
5 cl, 2 dwg, 1 tbl
SUBSTANCE: wastes of copper-based powdered compacts preliminary grinded till the size of not less than 5 mm and saturated by kerosene are activated in high-energy mill with the aid of mill balls covered by ferromanganese in quantity of 10 wt % in medium containing 10 wt % of kerosene. The ratio of balls covered by ferromanganese mass and dusty wastes mass is 10:1, activation time 1.75 h. Powder charge is prepared from the mixture of base powders containing 9 wt % of tin, 2.5 wt % of graphite and copper - the rest, and activated additive 4-32 wt % then cold pressing and roasting is carried out with possible further postcompaction.
EFFECT: increase of rupture resistance against radial compression, powder milling intensification.
1 tbl, 1 ex
SUBSTANCE: dusty wastes of copper-based charge are activated in high-energy mill with the aid of mill balls covered by ferromanganese in quantity of 10 wt %. The ratio of balls covered by ferromanganese mass and dusty wastes mass is S = 10:1, activation time τa=1.75 h. Powder charge is prepared from the mixture of base powders containing 9 wt % of tin, 2.5 wt % of graphite and copper - the rest, and activated additive 4-64 wt % then cold pressing and roasting is carried out with possible further postcompaction.
EFFECT: increase of rupture resistance against radial compression, utilisation of dusty wastes.
1 tbl, 1 ex
FIELD: composites, in particular metalomatrix composites.
SUBSTANCE: metalomatrix composite containing copper matrix, silicium carbide reinforcing elements, and diamond submicron powder reinforcing particles. Volume ratio of silicium carbide elements and diamond submicron powder particles is 0.5-5. Invention is useful for electrical engineering, machine engineering, electronic industry, etc.
EFFECT: material with improved hardness, endurance and strength characteristic.
3 cl, 3 ex