EP1012353A1 - Alloy and method for producing objects therefrom - Google Patents
Alloy and method for producing objects therefromInfo
- Publication number
- EP1012353A1 EP1012353A1 EP98945174A EP98945174A EP1012353A1 EP 1012353 A1 EP1012353 A1 EP 1012353A1 EP 98945174 A EP98945174 A EP 98945174A EP 98945174 A EP98945174 A EP 98945174A EP 1012353 A1 EP1012353 A1 EP 1012353A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silicon
- particles
- alloy
- aluminum
- hypereutectic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1042—Alloys containing non-metals starting from a melt by atomising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- 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
-
- 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
- C22C32/0047—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 carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—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 carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
- C22C32/0063—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 carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides based on SiC
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
Definitions
- the invention relates to an alloy with a proportion of particles and a method for producing objects from such an alloy, in particular with an addition of particles in an aluminum alloy which increases the wear resistance.
- Aluminum alloys with a proportion of particles that increases wear resistance in particular in the form of silicon primary crystals, are known, for example, as hypereutectic aluminum-silicon cast alloys. From this, z. B. pour entire engine blocks or even cylinder liners. When cooling, the silicon primary crystals are eliminated. The wear resistance z. B. the tread is achieved by the deposited, harder silicon primary crystals, which are superficially exposed by special treatment processes, in particular etching processes.
- a disadvantage of these hypereutectic aluminum-silicon casting alloys is that the silicon primary crystals are in the form of sharp-edged, partly needle-shaped crystals and in different sizes and distributions depending on the rate of solidification, so that mechanical processing requires special tools to deal with the conditions caused by the hard silicon primary crystals To keep wear within limits.
- the wear-resistant, hypereutectic aluminum-silicon casting alloys for cylinder blocks predominantly have a silicon content of approximately 17% by weight
- the separately produced cylinder liners can have silicon contents of 20 to 30% by weight, in which case, for example, initially an ingot by spray compacting a hypereutectic aluminum-silicon alloy or powder metallurgy from a powder of such a hypereutectic
- Manufactured aluminum-silicon alloy is disadvantageous both in the spray compacting of a hypereutectic aluminum-silicon alloy and in the powder metallurgical process that bars made entirely of a hypereutectic aluminum-silicon alloy are difficult to deform thermally and due to the precipitated silicon primary crystals and intermetallic phases cause high tool wear.
- German patent application 44 38 550 In order to reduce the wear of pistons sliding in the cylinders of such engine blocks due to these primary crystals and intermetallic phases, it is proposed according to German patent application 44 38 550 to expose the silicon primary crystals and particles from the intermetallic phase by means of mechanical finishing, and thereby to expose the exposed plateau surfaces of the primary crystals or To allow particles to pass into the base alloy material in a spherical or rounded manner at their edges.
- the invention is based on the problem of creating a metal alloy, in particular an aluminum alloy and a method for producing objects from such an alloy, which avoids the disadvantages mentioned, i. H. which is easy to process and process, in particular by hot forming, and yet has the wear resistance and / or uniform structure and mechanical strength required, for example.
- an aluminum alloy which, in a matrix of an easily machinable and machinable aluminum alloy, includes the addition of uniformly distributed particles, preferably silicon particles of less than 20% by weight, or of particles of a hypereutectic aluminum-silicon alloy, the individual Particles have high silicon contents, preferably up to 50% by weight, the silicon content in the easily processable and machinable aluminum alloy, but is preferably less than 20% by weight.
- silicon other hard particles, e.g. B. from silicon carbide and / or aluminum oxide can be added to the easily processable and editable aluminum alloy.
- the invention is based on the consideration that the silicon, which is readily soluble in an aluminum melt, must be prevented from going into solution in the matrix, since when silicon primary crystals leave the solution, the wear-increasing, relatively large crystals with angular and needle-like shapes arise.
- an aluminum alloy is easy to process and process, it is mixed with uniformly distributed silicon particles and / or silicon carbide particles and / or aluminum oxide particles and / or with particles of a hypereutectic aluminum-silicon alloy such that undissolved silicon particles and / or silicon carbide particles and / or aluminum oxide particles and / or Silicon primary crystals remain in the particles of the hypereutectic aluminum-silicon alloy in the aluminum alloy, these can be originally introduced, silicon particles, silicon carbide particles, which have not dissolved in the easily machinable and aluminum alloy matrix.
- Aluminum oxide particles or silicon primary crystals do not again take on the unfavorable shapes that arise during crystallization, but retain their original shape or are even rounded off by superficial dissolution, so that they lose their pronounced tips and corners.
- the matrix is composed of the easily machinable and machinable aluminum alloy so that no silicon primary crystals can crystallize out of this aluminum alloy and that finely divided silicon particles, silicon carbide particles, aluminum oxide particles or silicon primary crystals contain particles of a hypereutectic aluminum-silicon alloy have gone into solution in the matrix alloy.
- the matrix alloy does not therefore need to be overall hypereutectic to contain silicon particles, as is required in the known, wear-resistant aluminum-silicon alloys, but can preferably an addition of at most 12 wt .-% silicon in the form of silicon particles and / or silicon primary crystals in the particles of the hypereutectic
- the aluminum alloy processed into an object contains a minimum proportion of particles of a hypereutectic aluminum-silicon alloy containing silicon particles and / or silicon primary crystals, preferably at least 5% by weight of silicon particles and / or silicon primary crystals in the particles of the hypereutectic aluminum Silicon alloy based on the total amount, since it was found that such a proportion of silicon particles or silicon primary crystals which were not precipitated from the matrix alloy is sufficient to achieve the desired wear resistance.
- the proportion of silicon particles and / or aluminum oxide particles in the matrix alloy is preferably 5 to 20%.
- the matrix alloy as a hot-formable wrought aluminum alloy z. B. have a composition of the type AlMgSiCu and be provided with an addition of uniformly distributed silicon particles and / or particles of a hypereutectic aluminum-silicon alloy of less than 20% by weight, based on the total amount, prior to hot forming.
- the wrought aluminum alloys are good thermoformable alloys, the hot deformability of which is not lost by the addition of silicon particles or particles of a hypereutectic aluminum-silicon alloy.
- This addition of uniformly distributed silicon particles or of particles of a hypereutectic aluminum-silicon alloy can be relatively high, in particular if some of these silicon particles or the particles of a hypereutectic aluminum-silicon alloy go into solution during hot deformation and / or heat treatment. It is important, however, that a residual proportion of evenly distributed silicon particles that have not gone into solution and / or of silicon primary crystals in the particles of one hypereutectic aluminum-silicon alloy, preferably of at least about 5% by weight, based on the total, is retained, these silicon particles or the silicon primary crystals being present in the particles of a hypereutectic aluminum-silicon alloy without pronounced tips and corners.
- a heat treatment or hot working may possibly lead to a dissolving and partial dissolution of the silicon particles or the particles of a hypereutectic aluminum-silicon alloy, while the undissolved silicon particles or silicon primary crystals of the particles of a hypereutectic aluminum-silicon alloy preferably contain at least about 5 % By weight and have no pronounced tips and corners.
- the grain size of the silicon particles in the aluminum alloy is preferably at most 80 ⁇ m, the grain size of the particles of a hypereutectic aluminum-silicon alloy is preferably at most 250 ⁇ m, while that of the silicon primary crystals in the particles of the hypereutectic aluminum-silicon alloy is at most 20 ⁇ m .
- a method for producing objects, in particular wear-resistant objects, from an aluminum alloy is also proposed, in which an ingot is produced by spray compacting an aluminum alloy melt and the aluminum alloy in the spray jet silicon particles and / or particles of a hypereutectic aluminum silicon Alloy of less than 20% by weight based on the total amount can be added.
- the sprayed aluminum alloy melt can have a composition suitable for spray compacting and subsequent further processing by cutting shaping or by hot deformation, while the silicon particles supplied to the spray jet and / or the particles of a hypereutectic aluminum-silicon alloy are absorbed by the aluminum alloy melt in the spray jet and possibly also therein partially or partially dissolved are so that in the spray-compacted ingot silicon particles or silicon primary crystals of the particles of a hypereutectic aluminum-silicon alloy without pronounced tips and corners are present, which bring about the properties, in particular the wear resistance of the ingots thus produced and the articles made therefrom, without the wear of the interacting, increasing moving surfaces.
- the spray-compacted ingot can preferably be produced from a heat-formable aluminum alloy and then be hot-formed. It is also possible to manufacture the ingot from an easily machinable * aluminum alloy and then to shape it later.
- the embedded silicon particles and / or the silicon primary crystals in the particles of a hypereutectic aluminum-silicon alloy increase the wear resistance of the objects produced from the spray-compacted ingot.
- the article can be subjected to a heat treatment after the metal forming or the hot forming. It is conceivable that this heat treatment can lead to the fact that the silicon particles embedded in the aluminum alloy and / or the particles and the silicon primary crystals of the hypereutectic aluminum-silicon alloy contained therein react superficially with the aluminum alloy, as a result of which pronounced tips and corners are removed. This effect can also be achieved with spray compacting, which begins with the temperature of an aluminum alloy melt. Likewise, hot forming alone can already bring about the desired change in the surface of the silicon particles and / or the silicon primary crystals in the particles of a hypereutectic aluminum-silicon alloy.
- a method for producing is particularly advantageous wear-resistant objects made of a heat-formable aluminum alloy, in which a billet or compact made of alloy powder or a mixture of powder of different alloy components with the addition of uniformly distributed silicon particles and / or of particles of a hypereutectic aluminum-silicon alloy of less than 20% by weight % based on the total amount produced and this ingot or compact was subsequently deformed.
- Powder metallurgy makes it possible to produce aluminum alloys of any composition from a mixture of powders of different alloy components, which are homogenized by subsequent hot working. If, according to the invention, uniformly distributed silicon particles and / or particles of a hypereutectic aluminum-silicon alloy of less than 20% by weight, based on the total amount, are added to the mixture, the silicon particles or the particles of a hypereutectic aluminum-silicon alloy are mixed in the subsequent Thermoforming, as described above, evenly distributed and possibly superficially dissolved or partially dissolved, so that finally in the thermoformed object, preferably at least 5% by weight, based on the total amount, of uniformly distributed silicon particles and / or silicon primary crystals in the particles which have not gone into solution a hypereutectic aluminum-silicon alloy are present, which do not have the tips and corners of silicon primary crystals deposited from a hypereutectic alloy melt, but in the same way the wear resistance of the aluminum alloy lead in, which in this case is preferably a hot-form wrought
- the hot forming of the ingot or compact can, for. B. by hot rolling or by hot extrusion to bars, tubes and profiles or by hot extrusion, a subsequent heat treatment, if necessary, is used to desired properties of the aluminum alloy.
- the hot-formable aluminum alloy produced in this way is suitable for producing slugs from hot-rolled plates or hot-extruded bars and for producing finished products such as cylinder liners in the required final dimensions by hot extrusion.
- a compact i.e. H. produce a slug in the form of a round or a hollow round from powder by hydrostatic pressing, which is heated and then deformed by extrusion. Possibly. can be followed by a heat treatment.
- ingots or cylinders Another possibility for producing ingots or cylinders is to fill a powder with alloy components or the alloy and silicon particles and / or particles of a hypereutectic aluminum-silicon alloy into a mold and to sinter them at such a pressure and temperature that the required strength is achieved and the minimum amount of silicon particles or silicon primary crystals is present in the particles of a hypereutectic aluminum-silicon alloy. In this case too, further heat treatment may follow.
- All process sections that are carried out in the heat are to be coordinated with one another in such a way that the desired properties are achieved by the processing and processing heat and / or the heat treatment and in any case a residue of undissolved silicon particles or of silicon primary crystals in the particles of a hypereutectic aluminum Silicon alloy, preferably in a proportion of approximately 5% by weight, based on the total amount, is present.
- the silicon particles or the particles of a hypereutectic aluminum-silicon alloy preferably with a hypereutectic portion of the matrix alloy, if care is taken to ensure that a silicon portion in the form of silicon particles and / or silicon primary crystals in the particles of a hypereutectic aluminum-silicon Alloy, preferably in the amount of about 5% by weight based on the total amount, is retained.
- any alloy compositions are possible to which the silicon particles or the particles of a hypereutectic aluminum-silicon alloy are added in the manner according to the invention without going completely into solution, so that these added silicon particles or the particles of a hypereutectic aluminum-silicon alloy or the silicon primary crystals present therein remain undissolved in the matrix alloy and therefore no silicon primary crystals are separated from the matrix alloy.
- This is in contrast to the known hypereutectic alloys, in which silicon prim crystals are separated from the melt during cooling and have an angular or angular and needle-like shape.
- heat treatment leads to grain enlargement with needle formation, which is unfavorable for wear.
- the silicon particles or particles of a hypereutectic aluminum-silicon alloy added to the matrix alloy according to the invention are at most superficially dissolved and largely retain their original shape during heat treatment even if the silicon content in the form of the silicon particles and / or silicon primary crystals in the particles of a hypereutectic aluminum Silicon alloy is not more than about 12 wt .-% based on the total amount, corresponding to the eutectic aluminum-silicon.
- Wear-resistant objects produced by the method according to the invention can be poured, for example, as wear-resistant cylinder liners into a readily castable aluminum alloy, which is particularly suitable for casting cylinder blocks and can be easily machined, with post-processing of the cast-in cylinder liners possibly no longer being necessary if these are made from hot-rolled or hot-extruded primary material and slugs made from them by hot extrusion.
- a sufficient material bond between the cast aluminum alloy for the cylinder block and the cast-in cylinder liners according to the invention can be achieved with the method described in German Patent 43 28 619 without significant disadvantages in the use of powder metallurgy bars or compacts, which were subsequently thermoformed, detectable were.
- the surface treatment of the cylinder liners that may be required by etching does not change the dimensional accuracy, but only serves to expose the rounded silicon particles or silicon primary crystals from the added particles of a hypereutectic aluminum-silicon alloy.
- the aluminum alloy according to the invention can, for. B. also for the manufacture of pistons, hydraulic or pneumatic working cylinders as well as for flat slideways.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19737957 | 1997-08-30 | ||
DE19737957 | 1997-08-30 | ||
DE19801941A DE19801941A1 (en) | 1997-08-30 | 1998-01-20 | Alloy and method of making articles from this alloy |
DE19801941 | 1998-01-20 | ||
PCT/EP1998/005017 WO1999011834A1 (en) | 1997-08-30 | 1998-08-07 | Alloy and method for producing objects therefrom |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1012353A1 true EP1012353A1 (en) | 2000-06-28 |
EP1012353B1 EP1012353B1 (en) | 2002-11-27 |
Family
ID=26039578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98945174A Expired - Lifetime EP1012353B1 (en) | 1997-08-30 | 1998-08-07 | Alloy and method for producing objects therefrom |
Country Status (5)
Country | Link |
---|---|
US (1) | US6531089B1 (en) |
EP (1) | EP1012353B1 (en) |
JP (1) | JP2001515141A (en) |
AT (1) | ATE228580T1 (en) |
WO (1) | WO1999011834A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6761852B2 (en) * | 2002-03-11 | 2004-07-13 | Advanced Materials Technologies Pte. Ltd. | Forming complex-shaped aluminum components |
DE10313957A1 (en) * | 2002-06-27 | 2004-01-22 | Bwg Gmbh & Co. Kg | Method for coating a surface of a track component and track component |
DE10241028B3 (en) * | 2002-09-05 | 2004-07-29 | Erbslöh Ag | Process for the production of curved (rounded) structural components from an extruded profile |
DE102004007704A1 (en) * | 2004-02-16 | 2005-08-25 | Mahle Gmbh | Production of a material based on an aluminum alloy used for producing motor vehicle engine components comprises forming an aluminum base alloy containing silicon and magnesium, hot deforming and heat treating |
US20070102071A1 (en) * | 2005-11-09 | 2007-05-10 | Bac Of Virginia, Llc | High strength, high toughness, weldable, ballistic quality, castable aluminum alloy, heat treatment for same and articles produced from same |
JP2008180218A (en) * | 2006-12-28 | 2008-08-07 | Yamaha Motor Co Ltd | Internal combustion engine component and its manufacturing method |
CN101754826A (en) * | 2007-07-18 | 2010-06-23 | 艾尔坎技术及管理有限公司 | Aluminium-based duplex-aluminium material with a first phase and a second phase and method for producing said duplex-aluminium material |
US10718320B1 (en) * | 2017-04-06 | 2020-07-21 | Clayton Note | High pressure axial piston pump with multiple discharge ports |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3765877A (en) * | 1972-11-24 | 1973-10-16 | Olin Corp | High strength aluminum base alloy |
JPS5920444A (en) | 1982-07-22 | 1984-02-02 | Honda Motor Co Ltd | Fiber reinforced composite member |
JPS6050137A (en) | 1983-08-30 | 1985-03-19 | Riken Corp | Heat- and wear-resistant high-strength aluminum alloy member of hard particle dispersion type and its production |
JPS6050138A (en) * | 1983-08-30 | 1985-03-19 | Riken Corp | Heat- and wear-resistant high-strength aluminum alloy member of hard particle dispersion type and its production |
US4969428A (en) * | 1989-04-14 | 1990-11-13 | Brunswick Corporation | Hypereutectic aluminum silicon alloy |
US5022455A (en) | 1989-07-31 | 1991-06-11 | Sumitomo Electric Industries, Ltd. | Method of producing aluminum base alloy containing silicon |
US5366691A (en) * | 1990-10-31 | 1994-11-22 | Sumitomo Electric Industries, Ltd. | Hyper-eutectic aluminum-silicon alloy powder and method of preparing the same |
US5234514A (en) * | 1991-05-20 | 1993-08-10 | Brunswick Corporation | Hypereutectic aluminum-silicon alloy having refined primary silicon and a modified eutectic |
JP2703840B2 (en) * | 1991-07-22 | 1998-01-26 | 東洋アルミニウム 株式会社 | High strength hypereutectic A1-Si powder metallurgy alloy |
US5372775A (en) | 1991-08-22 | 1994-12-13 | Sumitomo Electric Industries, Ltd. | Method of preparing particle composite alloy having an aluminum matrix |
US5513688A (en) | 1992-12-07 | 1996-05-07 | Rheo-Technology, Ltd. | Method for the production of dispersion strengthened metal matrix composites |
US5545487A (en) | 1994-02-12 | 1996-08-13 | Hitachi Powdered Metals Co., Ltd. | Wear-resistant sintered aluminum alloy and method for producing the same |
JPH08218141A (en) | 1995-02-09 | 1996-08-27 | Mitsubishi Materials Corp | Aluminum alloy hot powder forged member excellent in cavitation damaging resistance and wear resistance |
DE19532244C2 (en) | 1995-09-01 | 1998-07-02 | Peak Werkstoff Gmbh | Process for the production of thin-walled tubes (I) |
US5851320A (en) * | 1996-01-05 | 1998-12-22 | Norsk Hydro, A. S. | Wear-resistant aluminum alloy and compressor piston formed therefrom |
DE69814498T2 (en) | 1997-02-12 | 2003-11-20 | Yamaha Motor Co Ltd | Pistons for an internal combustion engine and process for its manufacture |
-
1998
- 1998-08-07 JP JP2000508836A patent/JP2001515141A/en active Pending
- 1998-08-07 AT AT98945174T patent/ATE228580T1/en not_active IP Right Cessation
- 1998-08-07 EP EP98945174A patent/EP1012353B1/en not_active Expired - Lifetime
- 1998-08-07 WO PCT/EP1998/005017 patent/WO1999011834A1/en active IP Right Grant
- 1998-08-07 US US09/486,511 patent/US6531089B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9911834A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6531089B1 (en) | 2003-03-11 |
EP1012353B1 (en) | 2002-11-27 |
JP2001515141A (en) | 2001-09-18 |
WO1999011834A1 (en) | 1999-03-11 |
ATE228580T1 (en) | 2002-12-15 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20000328 |
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