EP0508434A1 - Procédé de fabrication de profilés extrudés - Google Patents

Procédé de fabrication de profilés extrudés Download PDF

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Publication number
EP0508434A1
EP0508434A1 EP92106183A EP92106183A EP0508434A1 EP 0508434 A1 EP0508434 A1 EP 0508434A1 EP 92106183 A EP92106183 A EP 92106183A EP 92106183 A EP92106183 A EP 92106183A EP 0508434 A1 EP0508434 A1 EP 0508434A1
Authority
EP
European Patent Office
Prior art keywords
matrix composite
extrusion
bolt
metal matrix
metal
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
Application number
EP92106183A
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German (de)
English (en)
Other versions
EP0508434B1 (fr
Inventor
Hans Peter Dipl.-Ing. Dr. Degischer
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.)
Oesterreichisches Forschungszentrum Seibersdorf GmbH
Original Assignee
Austria Metall AG
Oesterreichisches Forschungszentrum Seibersdorf GmbH
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Publication date
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Application filed by Austria Metall AG, Oesterreichisches Forschungszentrum Seibersdorf GmbH filed Critical Austria Metall AG
Publication of EP0508434A1 publication Critical patent/EP0508434A1/fr
Application granted granted Critical
Publication of EP0508434B1 publication Critical patent/EP0508434B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C33/00—Feeding extrusion presses with metal to be extruded ; Loading the dummy block
    • B21C33/004—Composite billet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/22—Making metal-coated products; Making products from two or more metals

Definitions

  • the invention relates to a method for producing extruded profile parts, in which a composite extruded bolt is formed from a monolithic metal body and at least one metal matrix composite body and is then heat-treated and extruded.
  • the composite extrusion bolt is formed from a metal matrix composite body as a bolt core, on the outside of which the monolithic metal body is arranged such that, after extrusion, the material of the monolithic metal body lies on the surface of the extruded profile part formed.
  • Metallic extruded profile parts for example long products, are generally made of relatively soft wrought alloys such as light metals, for example aluminum, copper etc. produced in an extrusion process at elevated temperature.
  • Aluminum matrix composites which are still mixed with carbon or graphite particles or carbon or graphite short fibers, also have good sliding properties.
  • the wear resistance or these sliding properties can be matched to the wear partner on the one hand by the choice of the component embedded in the aluminum matrix and on the other hand can be selected by appropriately adjusting the size distribution and the shape of the reinforcement component.
  • Particle reinforced aluminum matrix composites However, they generally do not achieve the high mechanical characteristics of high and extremely strong aluminum alloys, they have a lower ductility and fracture toughness and a reduced thermal and electrical conductivity.
  • the object on which the invention is based is therefore to create a method for producing extruded profile parts of the type mentioned at the outset, with which extruded profile parts with high mechanical properties on the one hand and high surface wear resistance on the other hand can be produced in one operation.
  • this object is achieved by that the metal matrix composite body is embedded in the monolithic metal body serving as a bolt core and in such a way that the material of the metal matrix composite body after extrusion lies on at least a desired part of the surface of the extruded profile parts.
  • the desired surface wear resistance is achieved in that a surface layer is formed from the material of the metal matrix composite body when the composite extrusion bolt is extruded. This is done in one operation with the shaping extrusion, without an additional manufacturing step being required after the extrusion.
  • the invention further relates to a composite extrusion bolt for use in the method according to the invention.
  • the single figure of the drawing shows longitudinal sectional views of different extrusion bolts for use in the method according to the invention as well as profile cross-sectional views of the profile parts produced with these extrusion bolts.
  • composite extruded bolts (1) are first produced, which, depending on the geometric and mechanical requirements of the end products, for example from a bolt core (2) in Form of a monolithic metal body from a conventional wrought alloy, which forms the profile body (3), for example from an aluminum alloy Types 1xxx, 2xxx, 3xxx, 5xxx, 6xxx, 7xxx and a matrix metal composite body (4) which is embedded in the bolt core and consists of a matrix composite material, for example an aluminum matrix composite material, which has the surface properties desired for the finished product Has.
  • the metal matrix composite can contain ceramic reinforcements or graphite reinforcements in particle or short fiber form.
  • the parts of the extrusion pin i.e. the core (2) and the Verrbund stresses (34) are manufactured separately and assembled so that the combined composite extrusion bolt (1) can be heat treated and introduced into a conventional extrusion system.
  • the extrusion process which corresponds to normal extrusion for profile parts made of monolithic wrought alloys, results in an end product, i.e. a profile part with the local or peripheral edge reinforcement (5) shown in the drawing.
  • the so-called dead zone in front of the extrusion tool is used, in which the edge region of the extrusion pin swirls and jams, so that its material is smeared over the extruded profile part.
  • the method according to the invention thus provides extruded profile parts, the surfaces of which are completely or wear-resistant in certain areas due to the aluminum matrix composite material, the properties of the load-bearing profile core made of the purely metallic alloy, in particular its mechanical properties, to the end product, i.e. the profile part formed are retained.
  • the extrusion of the extrusion bolt from the at least two materials that form the core and the at least one composite body takes place directly or indirectly.
  • the geometric shape of this composite depends on the extrusion technology, the type and shape of the tool, the flowability of the materials and the desired geometric shape of the surface areas, which have the desired properties demonstrate.
  • the achievable layer thicknesses are unlimited and can cover the entire cross-section or only 1/10 mm thick.
  • the surface layers can also vary from 0 to 100% of the cross section along the circumference of a profile.
  • the surface or reinforcement layer made of a metallic matrix composite material adapted to the material of the core welds to the core during the extrusion process, mechanical stresses at the interface can be reduced and chipping of the surface layer under mechanical and / or thermal stress can thus be avoided .
  • the material of the surface layer also provides sufficient ductility for further deformation or impact stress on the profile part.
  • the surface layer of hollow chamber profiles can be applied both inside and outside. It increases the wear resistance to all materials, locally reduces the thermal expansion (depending on the layer thickness) and increases the stiffness of the profile, especially if it is attached to the outside. Furthermore, the crack propagation is delayed by the reinforcement layer.
  • one or more composite bodies can be embedded in the bolt core of the composite extrusion bolt.
  • the composite body can be provided via a front part in the axial direction, for example with a final end plate;
  • several annular composite bodies can be provided for forming inner and outer layers in hollow profile parts, as is the case with the third Example from above, an axially central composite body can be embedded coaxially over a certain distance to form an internally reinforced hollow profile in the bolt core, as is the case with the fourth example from above, or one or more composite bodies over certain distances in axial direction Direction over a certain area of the cross section of the composite extrusion pin can be provided, as is the case with the last two examples.
  • the material of the metal matrix composite body lies on the surface of the extruded profile parts formed and materials can be selected for metal matrix composite bodies which have a lower coefficient of thermal expansion than the pure metal or alloy material of the monolithic metal body, the thermal expansion coefficient can be achieved the surface area of the extruded profile parts, for example, approximates the coefficient of thermal expansion of steel.
  • the extruded profile parts produced by the method according to the invention are to be connected to steel parts or if steel parts are to be replaced in constructions by the extruded profile parts produced by the method according to the invention.
  • the materials of the metal matrix composite body are more brittle than pure metals or alloys. They tend to initiate cracks (material fatigue, stress corrosion cracking, etc.). This danger can be countered by carrying out a heat treatment after the extrusion, in which the extruded profile parts are exposed to heat, that is, for example, subjected to a heat treatment to a temperature of 175 ° C. or more over a period of hours, so that they are relieved of internal stresses will, and then cooled very quickly - for example, being quenched.
  • the metal core made of the monolithic metal body has a higher coefficient of thermal expansion than the surface layer or edge layer made of the material of the metal matrix composite body, the metal core will want to contract more when cooling in the direction of the longitudinal axis of the extruded profile part than the surface layer made of the material of the metal matrix. Allows composite body. This has the consequence that the surface layer made of the material of the metal matrix composite body under a compressive stress, i.e. a compressive preload comes while the core made of the material of the monolithic metal body comes under a corresponding tensile stress (tensile preload).
  • a rod with a cross-sectional area of the metal core of 90 mm2 made of an alloy AA 6061 (Aluminum Association Norm USA) and a cross-sectional area of 10 mm2 one Surface layer made of an aluminum matrix composite body with silicon carbide (SiC) and aluminum oxide Al2O3 was outsourced so that it is free of internal stresses at 175 ° C, and then cooled very quickly to 20 ° C. In order to reduce the compressive prestress of the surface layer from the material of the metal matrix composite body in the longitudinal direction of the rod, a tensile force of 7300 N had to be applied.
  • Materials can be selected as alloy material AA 6061 for the metal core and as material for the metal matrix composite body, whose temperature expansion coefficient at 22x10 bei ° K ⁇ 1 to 23x10 ⁇ 6 ° K ⁇ 1 for the metal material and 16x10 ⁇ 6 ° K ⁇ 1 bis 19x10 ⁇ 6 ° K ⁇ 1 lies.
  • the coefficient of thermal expansion of the metal material was 23x10 ⁇ 6 ° K ⁇ 1 and that of the material of the metal matrix composite body was 19.5x10 ⁇ 6 ° K ⁇ 1.
  • the modulus of elasticity of the alloy material was 70 kN per mm2 and the material of the metal matrix composite body was 95 kN per mm2.
  • the aging temperature was 175 ° C, the aging time 2 to 30 h.
  • the cooling was carried out with water or with the aid of a blower to 20 ° C. in a short time, the measured compressive stress on the surface was 50 to 150 MPa.
  • composite extruded profile parts can be produced in series without additional subsequent coating and thus inexpensively.
  • the high wear resistance in connection with the light materials of the core of the profiles extends their service life and reduces their movable mass and thus the energy consumption when used as intended.
  • the mechanical and physical properties of the metal matrix composites of the reinforcement or surface layers improve the property profile of the extruded profile parts formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Extrusion Of Metal (AREA)
EP92106183A 1991-04-09 1992-04-09 Procédé de fabrication de profilés extrudés Revoked EP0508434B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4111509A DE4111509A1 (de) 1991-04-09 1991-04-09 Verfahren zum herstellen von strangpressprofilteilen
DE4111509 1991-04-09

Publications (2)

Publication Number Publication Date
EP0508434A1 true EP0508434A1 (fr) 1992-10-14
EP0508434B1 EP0508434B1 (fr) 1995-08-09

Family

ID=6429174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106183A Revoked EP0508434B1 (fr) 1991-04-09 1992-04-09 Procédé de fabrication de profilés extrudés

Country Status (2)

Country Link
EP (1) EP0508434B1 (fr)
DE (2) DE4111509A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0901939A3 (fr) * 1997-09-10 1999-04-21 DaimlerChrysler AG Plancher pour benne basculante
FR2876924A1 (fr) * 2004-10-27 2006-04-28 Pechiney Rhenalu Sa Element de structure file monolithique et bi-fonctionnel
EP1745868A1 (fr) * 2005-07-20 2007-01-24 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Panneau creux extrudé en alliage d'aluminium et son procédé de production
WO2007070731A1 (fr) * 2005-11-09 2007-06-21 Alcoa Inc. Element structurel extrude monolithique a plusieurs alliages et son procede de fabrication

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19532252C2 (de) * 1995-09-01 1999-12-02 Erbsloeh Ag Verfahren zur Herstellung von Laufbuchsen
DE19532244C2 (de) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Verfahren zur Herstellung von dünnwandigen Rohren (I)
DE102006052644A1 (de) * 2006-11-08 2007-09-27 Audi Ag Verfahren zum Herstellen eines Karosserieteils eines Fahrzeugs
DE102009032435B4 (de) * 2009-07-09 2012-08-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur Herstellung eines querfließgepressten Verbundkörpers und querfließgepresster Verbundkörper
CN113025840B (zh) * 2021-02-26 2021-12-24 南昌航空大学 具有良好界面结合的碳材料-铝基复合材料及制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1527783A1 (de) * 1966-01-03 1970-04-09 E Duerrwaechter Doduco Kg Dr Verfahren zum Strangpressen schichtweise aus unterschiedlichen Metallen und/oder Verbundwerkstoffen zusammengesetzter Bloecke und Pressmatrize zur Ausuebung des Verfahrens
FR2392738A1 (fr) * 1977-06-02 1978-12-29 Vmw Ranshofen Berndorf Ag Procede de fabrication de produits extrudes plaques
EP0105112A1 (fr) * 1982-08-09 1984-04-11 Siemens Aktiengesellschaft Dispositif pour la fabrication de demi-produits stratifiés

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1014063B (de) * 1952-10-01 1957-08-22 Comptoir Ind Etirage Warmpressverfahren zur Herstellung mehrschichtiger Metallstaebe oder -rohre
DE1783110B1 (de) * 1966-01-03 1971-03-18 Duerrwaechter E Dr Doduco Vorrichtung zur herstellung zweischichtigen halbzeugs durch strangpressen eines pulvermetallurgisch hergestellten blocks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1527783A1 (de) * 1966-01-03 1970-04-09 E Duerrwaechter Doduco Kg Dr Verfahren zum Strangpressen schichtweise aus unterschiedlichen Metallen und/oder Verbundwerkstoffen zusammengesetzter Bloecke und Pressmatrize zur Ausuebung des Verfahrens
FR2392738A1 (fr) * 1977-06-02 1978-12-29 Vmw Ranshofen Berndorf Ag Procede de fabrication de produits extrudes plaques
EP0105112A1 (fr) * 1982-08-09 1984-04-11 Siemens Aktiengesellschaft Dispositif pour la fabrication de demi-produits stratifiés

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0901939A3 (fr) * 1997-09-10 1999-04-21 DaimlerChrysler AG Plancher pour benne basculante
FR2876924A1 (fr) * 2004-10-27 2006-04-28 Pechiney Rhenalu Sa Element de structure file monolithique et bi-fonctionnel
WO2006045952A1 (fr) * 2004-10-27 2006-05-04 Alcan Rhenalu Element de structure file monolithique et bi-fonctionnel
JP2008517829A (ja) * 2004-10-27 2008-05-29 アルカン レナリュ 二機能性モノリシック押出し成形構造用材料
US7862903B2 (en) 2004-10-27 2011-01-04 Alcan Rhenalu Monolithic and bi-functional extruded structural element
EP1745868A1 (fr) * 2005-07-20 2007-01-24 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Panneau creux extrudé en alliage d'aluminium et son procédé de production
US7669384B2 (en) 2005-07-20 2010-03-02 Kobe Steel, Ltd. Extruded hollow aluminum alloy panel and method for producing the same
WO2007070731A1 (fr) * 2005-11-09 2007-06-21 Alcoa Inc. Element structurel extrude monolithique a plusieurs alliages et son procede de fabrication

Also Published As

Publication number Publication date
DE4111509A1 (de) 1992-10-15
EP0508434B1 (fr) 1995-08-09
DE59203165D1 (de) 1995-09-14

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