EP0320417B1 - Mechanical parts, such as piston connecting rods, made from an aluminium alloy with improved fatigue resistance, and process for their manufacture - Google Patents

Mechanical parts, such as piston connecting rods, made from an aluminium alloy with improved fatigue resistance, and process for their manufacture Download PDF

Info

Publication number
EP0320417B1
EP0320417B1 EP88420409A EP88420409A EP0320417B1 EP 0320417 B1 EP0320417 B1 EP 0320417B1 EP 88420409 A EP88420409 A EP 88420409A EP 88420409 A EP88420409 A EP 88420409A EP 0320417 B1 EP0320417 B1 EP 0320417B1
Authority
EP
European Patent Office
Prior art keywords
alloy
manufacture
aluminium alloy
connecting rods
improved fatigue
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.)
Expired - Lifetime
Application number
EP88420409A
Other languages
German (de)
French (fr)
Other versions
EP0320417A1 (en
Inventor
Jean-François Faure
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Constellium Issoire SAS
Original Assignee
Pechiney Rhenalu SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pechiney Rhenalu SAS filed Critical Pechiney Rhenalu SAS
Priority to AT88420409T priority Critical patent/ATE66023T1/en
Publication of EP0320417A1 publication Critical patent/EP0320417A1/en
Application granted granted Critical
Publication of EP0320417B1 publication Critical patent/EP0320417B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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

Definitions

  • the present invention relates to aluminum alloy parts having improved fatigue resistance and to a method for manufacturing said parts.
  • EP 144898 teaches an aluminum alloy containing by weight 10 to 36% of silicon, 1 to 12% of copper, 0.1 to 3% of magnesium and 2 to 10% of at least one element chosen from the group Fe, Ni, Co, Cr and Mn.
  • This alloy is applicable to the manufacture of parts intended for both the aeronautical and automotive industries, said parts being obtained by the technique of powder metallurgy comprising, in addition to shaping by compacting and spinning, an intermediate processing step thermal between 250 and 550 ° C.
  • this alloying element added to the others in an amount at least equal to 0.4% to have a suitable effect but not exceeding 1.5%, an amount beyond which the 'improvement obtained is no longer noticeable, had the consequence of increasing the fatigue resistance of the parts and this without harming neither the other properties obtained with the alloys of the prior art, nor their ability to be machined.
  • the invention also relates to a process for obtaining parts from such alloys.
  • the parts after being possibly subjected to machining, are heat treated between 480 and 530 ° C for 1 to 10 hours, then quenched in water before undergoing a tempering treatment between 150 and 200 ° C for 2 to 32 hours, which improves their mechanical characteristics.
  • Alloys no. 1, 2 and 3 were obtained by powder metallurgy, that is to say that they were melted at 900 ° C. and then atomized in a nitrogen atmosphere in the form of particles with a particle size of 300 ⁇ m. then compacted under 300 MPa in an isostatic press, spun in the form of a bar with a diameter of 40 mm.
  • the technique used was that of the "spray deposition" during which a deposit was obtained in the form of a cylindrical billet which was then transformed by spinning into a bar of diameter 40 mm. The bars originating from one or the other process were then treated for 2 hours between 490 and 520 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Heat Treatment Of Steel (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Conductive Materials (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

Aluminium alloy articles with an improved fatigue strength and process for their manufacture. <??>These articles are made of an alloy containing, by weight, 11 to 22% of silicon, 2 to 5% of iron, 0.5 to 4% of copper, 0.2 to 1.5% of magnesium, having a characteristic of containing 0.4 to 1.5% of zirconium. <??>The manufacturing process consists in subjecting the alloy in molten state to a means for fast solidification, in forming it, in subjecting it to a heat treatment between 480 and 530 DEG C followed by a water quenching and by annealing between 150 and 200 DEG C. <??>These articles find their application especially in the form of connecting rods and gudgeon pins.

Description

La présente invention est relative à des pièces en alliage d'aluminium ayant une résistance à la fatigue améliorée et à un procédé de fabrication desdites pièces.The present invention relates to aluminum alloy parts having improved fatigue resistance and to a method for manufacturing said parts.

On sait que l'aluminium a notamment pour propriétés d'être trois fois plus léger que l'acier et d'avoir une bonne résistance à la corrosion. En l'alliant à des métaux tels que le cuivre et le magnésium, on améliore fortement sa résistance mécanique. Par ailleurs, l'ajout de silicium donne un produit ayant une bonne résistance à l'usure. Ces alliages dopés avec d'autres éléments tels que le fer, le nickel, le cobalt, le chrome et le manganèse, conduisent à un compromis de propriétés qui en font un matériau de choix pour la fabrication de pièces pour automobiles telles que moteur, piston, cylindre, etc...We know that aluminum has the particular properties of being three times lighter than steel and of having good corrosion resistance. By combining it with metals such as copper and magnesium, its mechanical resistance is greatly improved. Furthermore, the addition of silicon gives a product having good wear resistance. These alloys doped with other elements such as iron, nickel, cobalt, chromium and manganese, lead to a compromise of properties which make it a material of choice for the manufacture of parts for automobiles such as engine, piston , cylinder, etc ...

C'est ainsi que l'EP 144898 enseigne un alliage d'aluminium contenant en poids 10 à 36% de silicium, 1 à 12% de cuivre, 0,1 à 3% de magnésium et 2 à 10% d'au moins un élément choisi dans le groupe Fe, Ni, Co, Cr et Mn.Thus, EP 144898 teaches an aluminum alloy containing by weight 10 to 36% of silicon, 1 to 12% of copper, 0.1 to 3% of magnesium and 2 to 10% of at least one element chosen from the group Fe, Ni, Co, Cr and Mn.

Cet alliage est applicable à la confection de pièces destinées aussi bien à l'industrie aéronautique qu'automobile, lesdites pièces étant obtenues par la technique de la métallurgie des poudres comportant, outre la mise en forme par compactage et filage, une étape intermédiaire de traitement thermique entre 250 et 550°C.This alloy is applicable to the manufacture of parts intended for both the aeronautical and automotive industries, said parts being obtained by the technique of powder metallurgy comprising, in addition to shaping by compacting and spinning, an intermediate processing step thermal between 250 and 550 ° C.

Si ces pièces répondent bien aux différentes propriétés énoncées ci-dessus, il en est une qui n'a pas encore été prise en compte, à savoir la tenue à la fatigue.If these parts respond well to the various properties set out above, there is one that has not yet been taken into account, namely fatigue resistance.

L'homme de l'art sait que la fatigue correspond à un changement permanent, localisé et progressif de la structure métallique qui se produit dans les matériaux soumis à une succession de contraintes discontinues et qui peut entraîner des fissures et même des ruptures des pièces après une application desdites contraintes suivant un nombre de cycles plus ou moins grand et ce alors que leur intensité est le plus souvent nettement inférieure à celle qu'il faut appliquer au matériau de façon continue pour obtenir une rupture par traction. C'est pourquoi les valeurs de module d'élasticité, de résistance à la traction, de dureté énoncées dans l'EP 144898 ne peuvent rendre compte de l'aptitude de l'alliage à la résistance à la fatigue.Those skilled in the art know that fatigue corresponds to a permanent, localized and gradual change in the metallic structure which occurs in materials subjected to a succession of discontinuous stresses and which can cause cracks and even ruptures of the parts after a application of said stresses according to a greater or lesser number of cycles and this while their intensity is most often significantly lower than that which must be applied to the material continuously to obtain a rupture by traction. This is why the values of modulus of elasticity, tensile strength, hardness stated in EP 144898 cannot account for the suitability of the alloy for resistance to fatigue.

Or, il est important pour des pièces telles que les bielles ou les axes de piston, par exemple qui travaillent en dynamique et qui sont soumises à des efforts périodiques, de présenter une bonne tenue à la fatigue.However, it is important for parts such as the connecting rods or the piston pins, for example which work in dynamics and which are subjected to periodic forces, to have good resistance to fatigue.

C'est pourquoi la demanderesse s'étant penchée sur ce problème a constaté que certes les pièces fabriquées à partir des alliages entrant dans le cadre du document sus-mentionné présentaient une résistance à la fatigue qui pouvait convenir à certaines applications, mais qu'il était possible d'améliorer notablement cette propriété en modifiant leur composition. C'est dans ce but qu'elle a mis au point des pièces en alliages d'aluminium contenant en poids 11 à 22% de silicium, 2 à 5% de fer, 0,5 à 4% de cuivre, 0,2 à 1,5% de magnésium ainsi que les inévitables impuretés caractérisées en ce qu'elles contiennent également 0,4 à 1,5% de zirconium.This is why the applicant, having looked into this problem, found that parts produced from alloys falling within the scope of the above-mentioned document certainly had a resistance to fatigue which could be suitable for certain applications, but that it was possible to significantly improve this property by modifying their composition. It is for this purpose that it has developed parts in aluminum alloys containing by weight 11 to 22% of silicon, 2 to 5% of iron, 0.5 to 4% of copper, 0.2 to 1.5% of magnesium as well as the inevitable impurities characterized in that they also contain 0.4 to 1.5% of zirconium.

En effet, la demanderesse s'est aperçue que cet élément d'alliage ajouté aux autres en quantité au moins égale à 0,4% pour avoir un effet convenable mais n'excédant pas 1,5%, quantité au-delà de laquelle l'amélioration obtenue n'est plus sensible, avait pour conséquence d'accroître la résistance à la fatigue des pièces et ce sans nuire ni aux autres propriétés obtenues avec les alliages de l'art antérieur, ni à leur aptitude à l'usinage.Indeed, the Applicant has noticed that this alloying element added to the others in an amount at least equal to 0.4% to have a suitable effect but not exceeding 1.5%, an amount beyond which the 'improvement obtained is no longer noticeable, had the consequence of increasing the fatigue resistance of the parts and this without harming neither the other properties obtained with the alloys of the prior art, nor their ability to be machined.

L'invention concerne également un procédé d'obtention des pièces à partir de tels alliages.The invention also relates to a process for obtaining parts from such alloys.

Il consiste après avoir élaboré l'alliage de composition revendiquée, à le fondre à une température supérieure à 900°C de manière à éviter tout phénomène de précipitation prématuré puis à le soumettre à un moyen de solidification rapide. En effet, comme les éléments tels que le fer et le zirconium sont très peu solubles dans l'alliage, il est indispensable pour obtenir des pièces répondant aux caractéristiques souhaitées d'éviter une précipitation grossière et hétérogène de ces éléments ce qu'on réalise en les refroidissant le plus rapidement possible.It consists, after having developed the alloy of the claimed composition, in melting it at a temperature above 900 ° C. so as to avoid any phenomenon of premature precipitation and then in subjecting it to a means of rapid solidification. Indeed, as elements such as iron and zirconium are very poorly soluble in the alloy, it is essential to obtain parts meeting the desired characteristics to avoid a coarse and heterogeneous precipitation of these elements which is achieved by cooling them as quickly as possible.

Il existe plusieurs façons d'opérer cette solidification rapide:

  • ― soit par atomisation du métal fondu à l'aide d'un gaz ou par atomisation mécanique suivie d'un refroidissement dans un gaz (air, hélium, argon); ce qui conduit à des poudres de granulométrie inférieure à 400 µm qui sont ensuite mis en forme par compactage à froid ou à chaud, dans une presse uniaxiale ou isostatique puis filage et/ou forgeage;
  • ― soit par projection de l'alliage fondu contre une surface métallique refroidie, technique désignée par les Anglo-Saxons sous l'expression "melt spinning", ou "planar flow casting" et dont on trouve des descriptions dans les brevets US 4.389.258 et EP 136.508, ce qui génère des rubans d'épaisseur inférieure à 100 µm qui sont ensuite mises en forme par compactage comme ci-dessus;
  • ― soit encore par projection de l'alliage fondu atomisé dans un courant de gaz contre un substrat, technique encore appelée "spray deposition" dont un exemple est donné dans le brevet GB 1.379.261, et qui conduit à un dépôt cohérent suffisamment malléable pour être mis en forme par forgeage, filage ou matriçage par exemple.
There are several ways to operate this rapid solidification:
  • - either by atomization of the molten metal using a gas or by mechanical atomization followed by cooling in a gas (air, helium, argon); which leads to powders with a particle size of less than 400 μm which are then shaped by cold or hot compaction, in a uniaxial or isostatic press then spinning and / or forging;
  • - Either by projection of the molten alloy against a cooled metallic surface, a technique designated by the Anglo-Saxons under the expression "melt spinning", or "planar flow casting" and of which descriptions are found in US Patents 4,389,258 and EP 136,508, which generates ribbons of thickness less than 100 μm which are then shaped by compacting as above;
  • - Or again by projection of the molten alloy atomized in a stream of gas against a substrate, a technique also called "spray deposition", an example of which is given in patent GB 1,379,261, and which leads to a coherent deposit which is sufficiently malleable for be shaped by forging, spinning or stamping for example.

Cette liste est bien entendu non exhaustive.This list is of course not exhaustive.

Afin d'affiner davantage la structure de précipitation, les pièces après avoir été soumises éventuellement à un usinage sont traitées thermiquement entre 480 et 530°C pendant 1 à 10 heures, puis trempées à l'eau avant de subir un traitement de revenu entre 150 et 200°C pendant 2 à 32 heures, ce qui améliore leurs caractéristiques mécaniques.In order to further refine the precipitation structure, the parts, after being possibly subjected to machining, are heat treated between 480 and 530 ° C for 1 to 10 hours, then quenched in water before undergoing a tempering treatment between 150 and 200 ° C for 2 to 32 hours, which improves their mechanical characteristics.

L'invention sera mieux comprise à l'aide des exemples d'application suivants:The invention will be better understood using the following application examples:

Six alliages ont été mis en oeuvre. Ils avaient la composition suivante en poids:

Figure imgb0001
Six alloys have been used. They had the following composition by weight:
Figure imgb0001

Les alliages n° 1, 2 et 3 ont été obtenus par métallurgie des poudres, c'est-à-dire qu'ils ont été fondus à 900°C puis atomisés dans une atmosphère d'azote sous forme de particules de granulométrie 300 µm puis compactés sous 300 MPa dans une presse isostatique, filés sous forme de barre de diamètre 40 mm.
Pour les alliages N° 4, 5 et 6, la technique utilisée était celle de la "spray deposition" au cours de laquelle on a obtenu un dépôt sous forme d'une billette cylindrique qui a été ensuite transformée par filage en barre de diamètre 40 mm. Les barres provenant de l'un ou l'autre procédé ont ensuite été traitées pendant 2 heures entre 490 et 520°C puis trempées à l'eau et soumises pendant 8 heures à une température comprise entre 160 et 190°C.
On a effectué sur des éprouvettes de chacune d'elles des mesures d'une part du module d'Young, d'autre part de la limite élastique conventionnelle à 0,2%, la charge de rupture et l'allongement successivement à 20°C et à 150°C après 100 heures de maintien, ainsi que les mesures de la limite de fatigue à 20°C au bout de 10⁷ cycles et du rapport d'endurance, défini par le rapport entre la limite d'endurance et la charge de rupture.Alloys no. 1, 2 and 3 were obtained by powder metallurgy, that is to say that they were melted at 900 ° C. and then atomized in a nitrogen atmosphere in the form of particles with a particle size of 300 μm. then compacted under 300 MPa in an isostatic press, spun in the form of a bar with a diameter of 40 mm.
For alloys 4, 5 and 6, the technique used was that of the "spray deposition" during which a deposit was obtained in the form of a cylindrical billet which was then transformed by spinning into a bar of diameter 40 mm. The bars originating from one or the other process were then treated for 2 hours between 490 and 520 ° C. then quenched with water and subjected for 8 hours at a temperature between 160 and 190 ° C.
We carried out on test pieces of each of them measurements on the one hand of the Young's modulus, on the other hand of the conventional elastic limit at 0.2%, the breaking load and the elongation successively at 20 ° C and at 150 ° C after 100 hours of maintenance, as well as the fatigue limit measurements at 20 ° C after 10⁷ cycles and the endurance ratio, defined by the ratio between the endurance limit and the load a break.

Les résultats figurent dans le tableau suivant:

Figure imgb0002
The results are shown in the following table:
Figure imgb0002

On constate la nette amélioration apportée par le zirconium sur la résistance à la fatigue, qui passe d'une limite de 150 à 192 MPa.We note the clear improvement brought by zirconium on the resistance to fatigue, which goes from a limit of 150 to 192 MPa.

Des résultats analogues ont été obtenus sur des pièces obtenues par "spray deposition" et "melt spinning" ou "planar flow casting".Similar results have been obtained on parts obtained by "spray deposition" and "melt spinning" or "planar flow casting".

Claims (3)

1. Aluminium alloy parts, such as in particular rods, having an improved fatigue strength and which, apart from aluminium and the unavoidable impurities contains by weight 11 to 22% silicon, 2 to 5% iron, 0.5 to 4% copper, 0.2 to 1.5% magnesium, characterized in that they also contain 0.4 to 1.5% zirconium.
2. Process for obtaining parts according to claim 1, characterized in that the alloy in the molten state undergoes rapid solidification, shaping, a heat treatment at between 480 and 530°C, hardening with water and tempering at between 150 and 200°C.
3. Process according to claim 2, characterized in that fast solidification takes place by a procedure constituted by atomization, spray deposition or melt spinning.
EP88420409A 1987-12-07 1988-12-05 Mechanical parts, such as piston connecting rods, made from an aluminium alloy with improved fatigue resistance, and process for their manufacture Expired - Lifetime EP0320417B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420409T ATE66023T1 (en) 1987-12-07 1988-12-05 MACHINERY PARTS SUCH AS CONNECTING RODS AND LIKE MADE OF ALUMINUM ALLOY WITH INCREASED FATIGUE RESISTANCE AND PROCESS FOR THEIR MANUFACTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8717674A FR2624137B1 (en) 1987-12-07 1987-12-07 ALUMINUM ALLOY PARTS, SUCH AS CONNECTING RODS, WITH IMPROVED FATIGUE RESISTANCE AND METHOD OF MANUFACTURE
FR8717674 1987-12-07

Publications (2)

Publication Number Publication Date
EP0320417A1 EP0320417A1 (en) 1989-06-14
EP0320417B1 true EP0320417B1 (en) 1991-08-07

Family

ID=9358003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420409A Expired - Lifetime EP0320417B1 (en) 1987-12-07 1988-12-05 Mechanical parts, such as piston connecting rods, made from an aluminium alloy with improved fatigue resistance, and process for their manufacture

Country Status (18)

Country Link
US (1) US4923676A (en)
EP (1) EP0320417B1 (en)
JP (1) JPH0617550B2 (en)
KR (1) KR890010260A (en)
CN (1) CN1034585A (en)
AT (1) ATE66023T1 (en)
BR (1) BR8806421A (en)
DD (1) DD276109A5 (en)
DE (1) DE3864128D1 (en)
DK (1) DK679288A (en)
ES (1) ES2024044B3 (en)
FI (1) FI885657A (en)
FR (1) FR2624137B1 (en)
HU (1) HUT50885A (en)
IL (1) IL88586A0 (en)
PL (1) PL276247A1 (en)
SU (1) SU1722234A3 (en)
YU (1) YU220988A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2636974B1 (en) * 1988-09-26 1992-07-24 Pechiney Rhenalu ALUMINUM ALLOY PARTS RETAINING GOOD FATIGUE RESISTANCE AFTER EXTENDED HOT HOLDING AND METHOD FOR MANUFACTURING SUCH PARTS
US5368629A (en) * 1991-04-03 1994-11-29 Sumitomo Electric Industries, Ltd. Rotor for oil pump made of aluminum alloy and method of manufacturing the same
JP3021487U (en) * 1995-08-08 1996-02-20 株式会社スリーリング Car armrest cover
DE69814498T2 (en) * 1997-02-12 2003-11-20 Yamaha Hatsudoki K.K., Iwata Pistons for an internal combustion engine and process for its manufacture
US7699595B2 (en) * 2004-07-19 2010-04-20 R + S Technik Gmbh Method and apparatus for molding a laminated trim component without use of slip frame
CN101775530B (en) * 2010-03-04 2012-03-28 安徽省恒泰动力科技有限公司 Hypereutectic al-si alloy piston material
US10531545B2 (en) 2014-08-11 2020-01-07 RAB Lighting Inc. Commissioning a configurable user control device for a lighting control system
CN106756293B (en) * 2016-12-20 2019-03-01 江苏豪然喷射成形合金有限公司 A kind of preparation method of ferro-silicon-aluminium copper magnesium alloy
CN107377973A (en) * 2017-08-30 2017-11-24 广东美芝制冷设备有限公司 Alloy components and its preparation method and application
CN108715957A (en) * 2018-05-31 2018-10-30 益阳仪纬科技有限公司 A kind of automotive transmission shell high-strength aluminum alloy composite material and its preparation process
DE102018117418A1 (en) * 2018-07-18 2020-01-23 Friedrich Deutsch Metallwerk Gesellschaft M.B.H. Die-cast aluminum alloy

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB388109A (en) * 1930-10-03 1933-02-23 Skoda Works Plzen Ltd Company Aluminium alloys for pistons
US1921195A (en) * 1931-07-14 1933-08-08 Aluminum Co Of America Aluminum silicon alloy
GB563617A (en) * 1941-12-04 1944-08-23 Fairweather Harold G C Improvements in or relating to aluminium base alloys
AU536976B2 (en) * 1980-09-10 1984-05-31 Comalco Limited Aluminium-silicon alloys
EP0144898B1 (en) * 1983-12-02 1990-02-07 Sumitomo Electric Industries Limited Aluminum alloy and method for producing same
US4734130A (en) * 1984-08-10 1988-03-29 Allied Corporation Method of producing rapidly solidified aluminum-transition metal-silicon alloys
JPS63192838A (en) * 1987-02-04 1988-08-10 Showa Denko Kk Aluminum-alloy powder compact excellent in creep resisting characteristic

Also Published As

Publication number Publication date
IL88586A0 (en) 1989-07-31
US4923676A (en) 1990-05-08
FR2624137B1 (en) 1990-06-15
ES2024044B3 (en) 1992-02-16
FI885657A (en) 1989-06-08
DK679288D0 (en) 1988-12-06
DK679288A (en) 1989-06-08
SU1722234A3 (en) 1992-03-23
DE3864128D1 (en) 1991-09-12
BR8806421A (en) 1989-08-22
HUT50885A (en) 1990-03-28
EP0320417A1 (en) 1989-06-14
JPH01198444A (en) 1989-08-10
CN1034585A (en) 1989-08-09
FR2624137A1 (en) 1989-06-09
ATE66023T1 (en) 1991-08-15
YU220988A (en) 1990-04-30
FI885657A0 (en) 1988-12-05
PL276247A1 (en) 1989-06-12
DD276109A5 (en) 1990-02-14
KR890010260A (en) 1989-08-07
JPH0617550B2 (en) 1994-03-09

Similar Documents

Publication Publication Date Title
EP0362086B1 (en) Process for producing items made from an aluminium alloy retaining a good fatigue resistance after a prolonged stay at a high temperature
US8420011B2 (en) Aluminum alloy plate and process for producing the same
US20170333986A1 (en) Steel plate for producing light structures and method for producing said plate
EP0320417B1 (en) Mechanical parts, such as piston connecting rods, made from an aluminium alloy with improved fatigue resistance, and process for their manufacture
FR2573777A1 (en) HEAT-RESISTANT HEAT-RESISTANT ALUMINUM ALLOY AND METHOD FOR MANUFACTURING CARRIER COMPONENT THEREOF
WO2008029011A2 (en) Steel plate for producing light structures and method for producing said plate
JP2007092117A (en) Aluminum alloy with high strength and low specific gravity
JPH0480081B2 (en)
FR2604186A1 (en) PROCESS FOR MANUFACTURING HYPERSILICALLY ALUMINUM ALLOY PARTS OBTAINED FROM COOLED COOLED POWDERS AT HIGH SPEED
JP4764094B2 (en) Heat-resistant Al-based alloy
EP0861912B1 (en) Wear-resistant coated member
CA2013270A1 (en) High-modulus, high-mechanical strength al-based alloy and production process
CN1278562A (en) Titanium aluminide, casting made by same and producing method thereof
CN114231798A (en) High-temperature-resistant wear-resistant aluminum alloy material and preparation method and application thereof
US20190062876A1 (en) Copper alloy containing tin, method for producing same, and use of same
US20240158892A1 (en) Al-Mn-Zr BASED ALLOYS FOR HIGH TEMPERATURE APPLICATIONS
US4889557A (en) Aluminium alloy having an excellent forgiability
JPH07197165A (en) High wear resistant free cutting aluminum alloy and its production
CA2444175C (en) Reinforced durable tool steel, method for the production thereof, method for producing parts made of said steel, and parts thus obtained
JPH02247348A (en) Heat-resistant aluminum alloy having excellent tensile strength, ductility and fatigue resistance
FR2636076A1 (en) PROCESS FOR MANUFACTURING STEEL ELEMENTS DESIGNED TO RESIST HIGH STRESSES, SUCH AS ROLLER BEARING ELEMENTS
JP2001294975A (en) Composite roll for rolling treatment
JPH11269592A (en) Aluminum-hyper-eutectic silicon alloy low in hardening sensitivity, and its manufacture
JP2888041B2 (en) Composite roll and method for producing the same
JPS61243138A (en) Production of structural member made of heat-resistant high-strength al sintered alloy

Legal Events

Date Code Title Description
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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890629

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CEGEDUR PECHINEY RHENALU

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PECHINEY RHENALU

17Q First examination report despatched

Effective date: 19901129

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19910807

Ref country code: AT

Effective date: 19910807

REF Corresponds to:

Ref document number: 66023

Country of ref document: AT

Date of ref document: 19910815

Kind code of ref document: T

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3864128

Country of ref document: DE

Date of ref document: 19910912

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19911231

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2024044

Country of ref document: ES

Kind code of ref document: B3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19921113

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19921123

Year of fee payment: 5

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19931231

Ref country code: CH

Effective date: 19931231

Ref country code: BE

Effective date: 19931231

BERE Be: lapsed

Owner name: PECHINEY RHENALU

Effective date: 19931231

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EAL Se: european patent in force in sweden

Ref document number: 88420409.0

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19951212

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19961114

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19961118

Year of fee payment: 9

Ref country code: DE

Payment date: 19961118

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19961213

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19961231

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19971209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980701

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971205

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980901

EUG Se: european patent has lapsed

Ref document number: 88420409.0

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051205