WO2006032068A1 - Matiere composite de matrice en bronze autolubrifiante - Google Patents

Matiere composite de matrice en bronze autolubrifiante Download PDF

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Publication number
WO2006032068A1
WO2006032068A1 PCT/AT2005/000368 AT2005000368W WO2006032068A1 WO 2006032068 A1 WO2006032068 A1 WO 2006032068A1 AT 2005000368 W AT2005000368 W AT 2005000368W WO 2006032068 A1 WO2006032068 A1 WO 2006032068A1
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Prior art keywords
volume
mos
powder
coated
carbon fibers
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Ceased
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PCT/AT2005/000368
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German (de)
English (en)
Inventor
Laurent Pambaguian
Andreas Merstallinger
Erich Neubauer
Vincent Calard
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Seibersdorf Labor GmbH
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ARC Seibersdorf Research GmbH
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Publication of WO2006032068A1 publication Critical patent/WO2006032068A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0089—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with other, not previously mentioned inorganic compounds as the main non-metallic constituent, e.g. sulfides, glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/09—Mixtures of metallic powders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/12—Metallic powder containing non-metallic particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F16C33/121—Use of special materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/16—Sliding surface consisting mainly of graphite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/56—Selection of substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/10—Alloys based on copper
    • F16C2204/12—Alloys based on copper with tin as the next major constituent

Definitions

  • the invention relates to a method for producing a novel self-lubricating metal-matrix composite material according to the preamble of claim 1 and to such a material according to the preamble of claim 16.
  • bearing cages serve to maintain the distance between the balls
  • Lubrication is these bearing cages, which are often made of porous plastics or metals, soaked with oils or greases. In some environments, lubrication with fats or oils is not possible, undesirable or even prohibited. Examples are in the
  • Millimeters are made in melt metallurgically produced bushes and these holes are filled with solid lubricant containing pastes or resins. Disadvantage is, among other things, a restriction of movement, only large movements are allowed.
  • micro-depots As an alternative apply composites, where the solid lubricant is introduced as a powder usually 5-500 microns ("micro-depots").
  • Composites are materials that consist of several components with the aim of combining their separate properties. In the sliding friction range or
  • Sliding bearing area are self-lubricating materials of interest. It is in one
  • Base material the matrix, another material, in particular a powder, fibers, etc., introduced, which serves for lubrication.
  • MMC bronze metal-matrix composites (MMC) bronze is known as a sliding bearing material, wherein powdery graphite is introduced to reduce the friction as a solid lubricant. Due to its layered structure, graphite lubricates perfectly.
  • a relatively low friction value under vacuum in particular ⁇ 0.1, in a temperature range of -100 to at least 300 ° C.
  • the lowest possible coefficient of friction should be aimed for under air, in particular below 0.3, since all applications are first subjected to test runs in air.
  • Solid lubricants can also be used as coatings.
  • MoS 2 -PVD Physical Vapor Deposition
  • the disadvantage of any coating is its finite life. Therefore, additional lubrication is already in progress, for example in bearing bearings the bearing rings are MoS 2 -coated and in addition a cage is used, which is made of composite material and contains MoS 2 .
  • the polymer composites used are only suitable for room temperature. In addition, there is a risk of decomposition by radiation in polymers.
  • Such composite materials is usually done by powder metallurgy. After mixing the metal powder, for example Cu and Sn, with the solid lubricant powder (s), eg graphite or MoS 2 , a bronze-like composite material is obtained by sintering, in particular under high pressure and high temperature of usually above 800 ° C.
  • the material lubricates itself by its solid lubricant by always releasing some solid lubricant during movement and distributing itself on the running surface of the bearing.
  • a lubricant content of not more than 20% is obtained. Clumping of the powder does not produce a homogeneous metal matrix, the material is brittle and in the worst case can easily disintegrate.
  • Electroless plating with graphite as a solid lubricant, high solid lubricant contents of more than 50% by volume are possible.
  • the powdered graphite is first encased or coated with Cu and only then mixed with the desired metal powders forming the alloy. Subsequently, the sintering takes place.
  • a major problem with the currently used solid lubricant composites is to find a material that is both durable and wear-resistant, but on the other hand good and long-lasting lubricating properties, ie low friction has.
  • the object of the invention is to provide a composite material of the type mentioned, which in particular under space conditions, i. Under vacuum and under changing and sometimes very high temperature load, can be used in plain bearings and avoids the above-mentioned problems as possible.
  • the reinforcing materials are readily available and effectively effective, also meet in particular carbon fibers, especially in air, certain lubrication tasks that reduce friction and thus positively influence the operation of a bearing. Due to the features of claim 17, there is the advantage that the material is not embrittled and that enough solid lubricant is present in the material.
  • the proposed measures in particular by the low sintering temperatures, it is possible to obtain a material that is virtually free of interfering copper sulfide compounds.
  • the MoS 2 solid lubricant By preventing the MoS 2 solid lubricant from reacting with copper, the material is less brittle or brittle. It also makes it possible at the same time to introduce relatively large amounts of solid lubricant into the material without losses of solid lubricants.
  • the material has improved wear properties and increased abrasion resistance compared to known bearings due to the reinforcing materials used. The reinforcements are easily available, inexpensive and effective.
  • the carbon fibers also have certain
  • Lubricating properties especially in the air, cause above all the lubricating effect.
  • the desired goal was also achieved of integrating the reinforcing substances firmly into the metal matrix. This is achieved in particular by the tin powder used, which embeds or envelops the reinforcing materials during its liquefaction and simultaneously alloys with the copper.
  • the starting materials used are commercially available powders, in particular tin powder, MoS 2 powder, optionally copper powder and reinforcing materials.
  • tin powder in particular tin powder, MoS 2 powder, optionally copper powder and reinforcing materials.
  • copper powder having a particle size of less than 40 microns
  • tin powder having a particle size of less than 63 // m or copper-coated MoS 2 powder having a particle size of less than 50 microns.
  • oxides such as aluminum oxide Al 2 O 3 , silicon dioxide SiO 2 , zirconium dioxide ZrO 2 should be mentioned here.
  • carbides such as silicon carbide SiC or nitrides, such as silicon nitride Si 3 N 4 .
  • quasicrystals such as Al 60 Cu 2S Fe 12 B 3 can be used.
  • the grain size is ideally between 25 and 63 microns. It is also advantageous if the particles are spherical or octahedral.
  • Particularly suitable reinforcing materials are carbon-based fibers, in particular carbon and / or graphite.
  • pitch type carbon fibers or carbon fibers produced by the pitch process are used here. Their length is about 300 to 600 ⁇ m. It is possible to use no reinforcing materials (FIGS. 1 and 2).
  • the MoS 2 powder is coated in a first step by means of a per se known method, eg the Electroless Plating method, with copper.
  • the thickness of the copper layer on the particles can be calculated in view of the final composition of the composite and is usually about 1 ⁇ m on all particles. This should slow down or prevent a later reaction of Cu with S. It is advantageous if the MoS 2 powder is coated with 58 to 98% by mass, preferably 60, 82 or 96% by mass of copper, the mass% being based on the total mass of the Cu-coated MoS 2 powder.
  • the reinforcing agents may be added to the mixture either as reinforcing agents per se.
  • the reinforcing materials e.g. the carbon fibers are also coated with copper.
  • the material matrix is more homogeneous and the quality of the alloy or material improved.
  • Electroless plating are performed, wherein the carbon fibers with 80 to 98% by mass, preferably 90.5% by mass, of copper, the mass% are based on the total mass of the Cu-coated reinforcing materials or fibers, coated.
  • copper-coated carbon fibers of the pitch type are used here, which have a length of about 500 to 600 ⁇ m.
  • the starting materials that is, the tin powder, the copper-coated MoS 2 powder, the copper-coated reinforcing materials, in particular carbon fibers, and optionally the copper powder are mixed so that in the later material a final composition of the metal alloy or the bronze of Cu5Sn to Cu15Sn, in particular Cu9Sn to Cu13.5Sn, preferably from Cu11 Sn to Cu13Sn is achieved.
  • the copper later forming the bronze alloy is derived exclusively from the Cu-coated MoS 2 powder and / or the Cu-coated reinforcing materials and that it is not necessary to add Cu powder. Whether an addition is necessary depends on the desired composition of the target alloy and on the proportion of Cu present in the coating. If, for example, the MoS 2 powder is only coated with 60% by weight of Cu and an alloy with a low Sn content is to be obtained, it will be necessary to add Cu.
  • the composition of the alloy can be well controlled by the additional addition of copper powder.
  • the person skilled in the art can calculate the quantities of the powders to be mixed in advance.
  • the powders or granules are intensively mixed under a liquid which as far as possible prevents the former reactions or changes in the starting materials, in particular isopropanol, in particular for at least two hours.
  • the mixture is dried and then further dry-blended, especially for about 1 hour.
  • the powder mixture is then filled into a graphite mold. If several plates are to be produced at the same time, the beds can be separated by graphite plates. A separation of the compacts and the mold by graphite foils is advantageous.
  • the pressure is usually 6.5mm high and has a diameter of 50mm.
  • the target temperature In order to avoid the formation of copper sulfides or the chemical reaction of copper with sulfur during this step, the target temperature must be at the Hot sintering below 720 0 C lie. However, if the temperatures are too low embrittlement of the material matrix occurs and the properties of the material deteriorate drastically. As a result, a range of the target temperature of 420 ° to 720 °, preferably from 500 to 600 °, in particular from 535 to 565 °, in particular about 550 °, advantageously apply to achieve an optimal result.
  • a vacuum is produced in the hot press, then hydrogen is supplied and the sample is kept under a reducing hydrogen atmosphere at about 10 to 100 mbar.
  • slow heating takes place, preferably over a period of about two hours to the selected target temperature.
  • This target temperature is held for about 45 minutes before the pressing pressure of 20 to 40 MPa, preferably 25 to 35 MPa, begins.
  • the pressing is held at the target temperature and under the pressing pressure for about 75 minutes or until no more movement or compression occurs.
  • slow cooling which can extend over a period of about 3 hours, while maintaining the pressing pressure.
  • the pressing pressure is finally reduced, and the sample is further cooled.
  • the porosity is calculated as the difference between the measured and the theoretical density or as vol% of the trapped air or the pores in the material.
  • MMC metal-matrix composite material
  • the material has a high strength. It is advantageous that there are no alloying elements with a high vapor pressure, such as, for example, zinc, lead or the like, because these alloying elements can sublime in a vacuum. Embedded in the material or in the metal matrix is unbound, original
  • MoS 2 wherein the MoS 2 particles are distributed substantially uniformly in the crack-free metal matrix.
  • the MoS 2 acts as a solid lubricant and is responsible for the low friction under vacuum.
  • the material are 10 to 50% by volume, in particular 15 to 27% by volume, preferably 23 to 26% by volume, MoS 2 , wherein the volume percent - as otherwise
  • the process avoids as far as possible the formation of copper-sulfur compounds.
  • the material contains less than 3% by volume, in particular less than 1% by volume, preferably less than 0.2% by volume, of compounds between copper or tin with molybdenum and / or sulfur and / or MoS 2 .
  • Undesirable compounds would be, for example, CuS, Cu 2 S or CuMo 2 S 3 .
  • the volume percentages again refer to the volume of the compact material without air pockets. That no reaction has taken place is confirmed by X-ray diffraction analysis.
  • Carbon fibers in an amount of 5 to 30% by volume, in particular 10 to
  • the carbon fibers in particular the pitch cohesive fibers, in addition to the abrasion and / or strength-increasing properties, also have certain lubricating properties or also act as solid lubricants, in particular under air. They complement the effect of the MoS 2 , which lubricates well, especially under vacuum. Thus, a synergistic effect is achieved which gives the material good lubricating properties both under air and under vacuum.
  • the porosity of the material is less than 5% by volume, in particular less than 3% by volume, based on the total material volume, including air inclusions.
  • the MoS 2 particles I are deformed by the compaction.
  • the MoS 2 particles are aligned essentially along the axial pressing direction, they are compacted or stretched MoS 2 particles, respectively, and the MoS 2 particles are strung together to form elongate MoS 2 particle regions. This is well visible in Figs. 1 and 2.
  • Fig. 1 shows a light-optical micrograph of a section through a material in the axial direction, that is, along or approximately parallel to the axial pressing direction in the hot sintering, so to speak, a view from above of the pressure.
  • the MoS 2 particles are clearly visible, which are distributed uniformly and without significant deformation in the crack-free bronze matrix.
  • FIG. 2 shows a photomicrograph of a radial section through the material, that is, one looks perpendicular to the axial pressing direction or the pressure is viewed from the side.
  • the deformed MoS 2 particles or the MoS 2 particle regions are aligned along or approximately parallel to this axial pressing direction, which extends in FIG. 2 from left to right, ie parallel to the image plane are. This orientation can be seen in the smaller MoS 2 particles or MoS 2 particle regions as well as in the larger ones.
  • FIGS. 5a, b and c show schematic views of a cylindrical compact.
  • Fig. 5a shows the pressure before sintering in side view
  • Fig. 5b shows the pressure after sintering in cross section
  • Fig. 5c shows the pressure after sintering in plan view.
  • the powders or fibers are distinguishable by different shades.
  • Fig. 3 is a light micrograph of the material along or from the perspective of the axial pressing axis or pressing direction is shown. It can be seen that the MoS 2 particles are uniformly distributed and not deformed and are present in the matrix without recognizable longitudinal extensions. However, the elongated carbon fibers are aligned substantially parallel to the radial plane, that is, normal to the axial pressing direction.
  • the carbon fibers lie in the image plane and perpendicular to the pressing direction, the MoS 2 regions are substantially normal to the image plane and parallel to the pressing direction
  • FIG. 4 shows a light micrograph of a section through the material in the radial direction perpendicular to the axial pressing direction. It can clearly be seen here that, analogously to FIG. 2, the MoS 2 particles or the MoS 2 particle regions are also along or approximately parallel to the axial pressing direction, which in FIG. 4 is from left to right, ie extends horizontally to the image plane, deformed or aligned. This is also illustrated schematically in FIG. 5b.
  • the pressing direction comes from above.
  • the carbon fibers lie horizontally to the image plane, the MoS 2 areas vertically.
  • Copper powder (size ⁇ 40 ⁇ m, density 8.94 g / cm 3 ), tin powder (size ⁇ 63 ⁇ m, density 7.28 g / cm 3 ), copper-coated MoS 2 powder (size ⁇ 50 ⁇ m, density 5.0 g / cm 3) ) coated with 82.17 weight% (calculated from the total weight of coated MoS 2 powder) of copper (Platingtech) and copper-coated pitch carbon fibers (length 550 ⁇ m, density 2.15 g / cm 3 ) (K13A10, Mitsubishi), which are coated with 90.5% by weight (calculated on the total weight of the coated carbon fibers) of copper, are mixed together so that in the later material a final composition of the metal alloy or the bronze of Cu12Sn is achieved.
  • the material contains 25 vol% MoS 2 , based on the volume of the compact material without air inclusions, and 15% by volume of carbon fibers, based on the volume of the compact material without air inclusions.
  • the skilled person can easily calculate the amounts of the powder to be mixed in advance and mix accordingly.
  • the powders or granules are mixed intensively in a first step under isopropanol for two hours. After this wet mixing process, the mixture is dried and then further mixed dry for 1 hour. To produce semifinished product, the powder mixture is then filled into a graphite mold.
  • a vacuum is produced in the hot press, then hydrogen is supplied and the sample is kept under a reducing hydrogen atmosphere at 50 mbar.
  • slow heating takes place over a period of two hours up to the selected target temperature of 550 ° C. This target temperature is held for 45 minutes before the pressing pressure of 30 MPa begins.
  • the pressing is held at the target temperature and under the pressing pressure for 75 minutes or until no more movement or compression occurs.
  • slow cooling takes place over a period of 3 hours while maintaining the pressing pressure.
  • the pressing pressure is finally reduced, and the sample is further cooled.
  • MMC metal-matrix composite
  • the wear rate [mm 3 / Nm] of the material is very low. Under air and at 25 ° C, the material has a mean friction coefficient of 0.18 and a wear rate of 5 * 10 '6 mm 3 / Nm. Under vacuum and at 25 0 C, the material has an average coefficient of friction of 0.07 and a wear rate of 4 * 10 '5 mm 3 / Nm. Under vacuum and at 300 0 C, the material has an average coefficient of friction of 0.2 and a wear rate of 3 * 10 '6 mm 3 / Nm. The modulus of elasticity of this material is about 50 GPa, the yield strength at about 250 Mpa.
  • Example 1 38.36g tin powder, 162.9g 82.17 weight% copper coated MoS 2 powder (Platingtech) (based on the total weight of the coated MoS 2 powder) and 162.9g 90.5 weight% copper coated pitch carbon fibers (K13A10, Mitsubishi) (based on the total weight of the coated carbon fibers) are mixed together as in Example 1 and sintered according to the method described in Example 1 at 445 to 455 0 C.
  • MMC metal-matrix composite
  • the material Under air and at 25 ° C, the material has an average coefficient of friction of 0.29 and a wear rate of 2 * 10 '6 mm 3 / Nm. Under vacuum and at 25 ° C the material has an average coefficient of friction of 0.41 and a wear rate of 5 * 10 "4 mm 3 / Nm Under vacuum and at 300 0 C, the material has an average coefficient of friction of 0.34 and a wear rate of 8 * 10 6 mm 3 / Nm.
  • the modulus of this material at room temperature is at about 71 GPa and at 300 0 C for about 59 GPa
  • the tensile modulus at room temperature is at about 342 MPa and at 300 0 C at about 235 Mpa.
  • Example 3 8.2 g of tin powder, 40 g of 60% by weight copper-coated MoS 2 powder (Platingtech) (based on the total weight of the coated MoS 2 powder), 40 g of 90% by weight copper-coated pitch carbon fibers (K13A10, Mitsubishi) (based on the total weight of the coated carbon fibers) are mixed together.
  • a final composition of the metal alloy or the bronze of Cu12Sn is achieved in the later material.
  • the material contains 25 vol% MoS 2 , based on the volume of the compact material without air inclusions, and 15% by volume of carbon fibers, based on the volume of the compact material without air inclusions.
  • the powders or granules are mixed intensively in a first step under isopropanol for two hours. After this wet mixing process, the mixture is dried and then further mixed dry for 1 hour. To produce semifinished product, the powder mixture is then filled into a graphite mold.
  • a vacuum is produced in the hot press, then hydrogen is supplied and the sample is kept under a reducing hydrogen atmosphere at 70 mbar. Now be made slow heating, over a period of two hours up to the selected target temperature of 54O 0 C. These target temperature is maintained for 40 min before the press pressure of 40 MPa are used. Subsequently, the pressure is maintained at the target temperature and under the pressure for 60 minutes or until no movement or compression occurs. This is followed by slow cooling over a period of 2.5 h while maintaining the pressing pressure. The pressing pressure is finally reduced, and the sample is further cooled.
  • MMC metal matrix composite material
  • the porosity is below 3% in all cases.
  • the com sizes and densities of the powders or fibers used in Example 1 also apply to Examples 2 and 3.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne un procédé pour réaliser une matière composite de matrice en métal autolubrifiante, selon lequel on mélange de la poudre Sn, de la poudre MoS2 à revêtement Cu et éventuellement de la poudre Cu, avant de les compacter à hautes températures. Selon l'invention, avant l'opération de compactage, on ajoute des matières de renforcement, de préférence des carbures sous forme de cristaux ou de poudre, des nitrures, des borures, des oxydes et/ou des fibres à base de carbone, notamment des fibres de carbone et en particulier des fibres de carbone de type pitch ou fabriquées selon le procédé pitch, le compactage ou le frittage étant réalisé à une température cible dans la plage de 420° à 720°, notamment de 500° à 600°, de préférence de 535° à 565°, et mieux encore à environ 550°.
PCT/AT2005/000368 2004-09-23 2005-09-14 Matiere composite de matrice en bronze autolubrifiante Ceased WO2006032068A1 (fr)

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ATA1600/2004 2004-09-23
AT16002004 2004-09-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113183565A (zh) * 2021-06-03 2021-07-30 河南工业大学 一种高速列车用碳纤维增强型滑动集电材料的制备方法
CN113235021A (zh) * 2021-04-27 2021-08-10 西峡县泰祥实业有限公司 一种铜基耐磨减磨材料及其制备工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55164050A (en) * 1979-06-08 1980-12-20 Nippon Funmatsu Gokin Kk Sliding frictional material
JPH11158568A (ja) * 1997-11-28 1999-06-15 Nisshin Steel Co Ltd 耐摩耗性および摺動特性に優れる銅合金およびその製造方法
EP1391620A2 (fr) * 2002-08-23 2004-02-25 Senju Metal Industry Co., Ltd. Revêtement de palier multicouches et sa méthode de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55164050A (en) * 1979-06-08 1980-12-20 Nippon Funmatsu Gokin Kk Sliding frictional material
JPH11158568A (ja) * 1997-11-28 1999-06-15 Nisshin Steel Co Ltd 耐摩耗性および摺動特性に優れる銅合金およびその製造方法
EP1391620A2 (fr) * 2002-08-23 2004-02-25 Senju Metal Industry Co., Ltd. Revêtement de palier multicouches et sa méthode de fabrication

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 005, no. 041 (C - 047) 18 March 1981 (1981-03-18) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 11 30 September 1999 (1999-09-30) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113235021A (zh) * 2021-04-27 2021-08-10 西峡县泰祥实业有限公司 一种铜基耐磨减磨材料及其制备工艺
CN113183565A (zh) * 2021-06-03 2021-07-30 河南工业大学 一种高速列车用碳纤维增强型滑动集电材料的制备方法

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