EP1281461B1 - Process for preparing near net shaped workpieces from light metal alloys that are difficult to work - Google Patents

Process for preparing near net shaped workpieces from light metal alloys that are difficult to work Download PDF

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Publication number
EP1281461B1
EP1281461B1 EP01127413A EP01127413A EP1281461B1 EP 1281461 B1 EP1281461 B1 EP 1281461B1 EP 01127413 A EP01127413 A EP 01127413A EP 01127413 A EP01127413 A EP 01127413A EP 1281461 B1 EP1281461 B1 EP 1281461B1
Authority
EP
European Patent Office
Prior art keywords
process according
light metal
extrusion
shaped body
divided
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.)
Revoked
Application number
EP01127413A
Other languages
German (de)
French (fr)
Other versions
EP1281461A1 (en
Inventor
Arlt Manfred
Bölster Alfred
Eiberger Anton
Franz Thomas
Heinritz Dr.Manfred
Laag Dr.Rainhard
Pohl Dr.Angelika
Schmid Jochem
Stock Otto
Subeck Gerard
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.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
SCHWAEBISCHE HUETTENWERKEGMBH
Schwaebische Huettenwerke Automotive GmbH
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
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Application filed by SCHWAEBISCHE HUETTENWERKEGMBH, Schwaebische Huettenwerke Automotive GmbH filed Critical SCHWAEBISCHE HUETTENWERKEGMBH
Priority to HU0401206A priority Critical patent/HUP0401206A2/en
Priority to ES02754408T priority patent/ES2231721T3/en
Priority to DE50201420T priority patent/DE50201420D1/en
Priority to BR0211267-1A priority patent/BR0211267A/en
Priority to PCT/DE2002/002692 priority patent/WO2003011501A2/en
Priority to DE10293319T priority patent/DE10293319D2/en
Priority to KR10-2004-7000580A priority patent/KR20040030054A/en
Priority to CA002438397A priority patent/CA2438397A1/en
Priority to AT02754408T priority patent/ATE280647T1/en
Priority to JP2003516724A priority patent/JP2004536232A/en
Priority to EP20020754408 priority patent/EP1412113B1/en
Publication of EP1281461A1 publication Critical patent/EP1281461A1/en
Publication of EP1281461B1 publication Critical patent/EP1281461B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • 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
    • 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
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B22F2003/206—Hydrostatic or hydraulic extrusion
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to a method for the near-net-shape production of components or semi-finished products made of hard-to-cut light metal alloys and one made by the process Component or semi-finished product.
  • powder-metallurgical manufacturing is highly wear-resistant Components of the material delivered as powder, processed in the classic powder press process, sintered, heat treated and calibrated.
  • the peculiarity of such a highly wear-resistant the material is very distorted during sintering due to the necessary liquid phase sintering is caused.
  • the required dimensional and dimensional accuracy in the subsequent Calibration is restricted here.
  • the invention can also be referred to are used as a method for producing a sintered part made of sintered light metal with variable Proportions of wear protection particles as an alloy component.
  • this is a method for producing Sintered molded parts made of light metals, preferably aluminum with 10 - 30% silicon content, Mg 0-3%, Cu 0-5%, Zn and Fe 0-7%.
  • Other light metals with changed Si components can be produced in this way.
  • hard material particle additives can also be used such as oxides, carbides and silicates with proportions of 0-30%.
  • the process advantageously combines the processes of cold or hot isostatic presses, Extrusion, sawing and calibration with preferably integrated faceting, if necessary Heat treatment and forging into a new whole.
  • the starting point of the invention is the powder metallurgical material Aluminum with Si fractions of approx. 14% which, among other things, is used in an application Sprocket against a steel chain, as a rotor and stator in a camshaft phasing system or an oil pump has excellent, previously unknown, good wear properties.
  • the precision that is customary in sintered parts is generated.
  • the big delays like in the classic sintering process described above no longer occur here.
  • the highly wear-resistant Material can be manufactured in close dimensional tolerances.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Adornments (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

Production of components and semi-finished products comprises: preparing a powder material made from light metal and alloying components, especially wear-resistant carriers; isostatically pressing into a molded body; and extruding close to the sintering temperature of the light metal. Preferred Features: The light metal is aluminum. The alloying components comprise 10-30 wt.% silicon, 0-3 wt.% magnesium, 0-5 wt.% copper, 0-7 wt.% zinc, and 0-7 wt.% iron. The wear-resistant carriers are selected from silicon and/or hard material particle additives, especially oxides, carbides and silicates in an amount of 0-30 wt.%.

Description

Die Erfindung betrifft ein Verfahren zur endkonturnahen Fertigung von Bauteilen bzw. Halbzeugen aus schwer zerspanbaren Leichtmetalllegierungen und ein durch das Verfahren hergestelltes Bauteil bzw. Halbzeug.The invention relates to a method for the near-net-shape production of components or semi-finished products made of hard-to-cut light metal alloys and one made by the process Component or semi-finished product.

Herkömmlicherweise wird bei der pulvermetallurgischen Herstellung von hochverschleißfesten Bauteilen der Werkstoff als Pulver angeliefert, im klassischen Pulverpressverfahren verarbeitet, gesintert, wärmebehandelt und kalibriert. Die Eigenart eines solchen hochverschleißfesten Werkstoffes ist jedoch ein starker Verzug beim Sintern, der durch die notwendige Flüssigphasensinterung hervorgerufen wird. Die geforderte Form- und Maßgenauigkeit beim anschließende Kalibrieren ist hier eingeschränkt.Traditionally, powder-metallurgical manufacturing is highly wear-resistant Components of the material delivered as powder, processed in the classic powder press process, sintered, heat treated and calibrated. The peculiarity of such a highly wear-resistant However, the material is very distorted during sintering due to the necessary liquid phase sintering is caused. The required dimensional and dimensional accuracy in the subsequent Calibration is restricted here.

Um diesen Nachteil der oben genannten Werkstoffe im Punkt Genauigkeit zu beheben, wird erfindungsgemäß ein Verfahren gemäß dem Anspruch 1 zur Verfügung gestellt. Die Unteransprüche richten sich auf bevorzugte Ausführungsformen der Erfindung.To eliminate this disadvantage of the above materials in terms of accuracy, according to the invention a method according to claim 1 made available. The subclaims are directed towards preferred Embodiments of the invention.

Mit anderen Worten und in einer Ausführungsvariante kann die Erfindung auch bezeichnet werden als Verfahren zur Herstellung eines Sinterteiles aus Sinterleichtmetall mit veränderlichen Anteilen an Verschleißschutzpartikeln als Legierungsanteil.In other words and in an embodiment variant, the invention can also be referred to are used as a method for producing a sintered part made of sintered light metal with variable Proportions of wear protection particles as an alloy component.

Gemäß einer Ausführungsform der Erfindung ist diese ein Verfahren zur Herstellung von Sinterformteilen aus Leichtmetallen, vorzugsweise Aluminium mit 10 - 30 % Siliziumanteilen, Mg 0 - 3 %, Cu 0 - 5 %, Zn und Fe 0 - 7 %. Auch andere Leichtmetalle mit veränderten Si-Anteilen sind so herstellbar. Alternativ zu Si als Verschleißträger können auch Hartstoffpartikelzusätze wie Oxide, Carbide und Silikate mit Anteilen von 0 - 30 % eingesetzt werden. According to one embodiment of the invention, this is a method for producing Sintered molded parts made of light metals, preferably aluminum with 10 - 30% silicon content, Mg 0-3%, Cu 0-5%, Zn and Fe 0-7%. Other light metals with changed Si components can be produced in this way. As an alternative to Si as a wear carrier, hard material particle additives can also be used such as oxides, carbides and silicates with proportions of 0-30%.

Das Verfahren vereinigt vorteilhafterweise die Verfahren Kalt- oder Heißisostatpressen, Strangpressen, Sägen und Kalibrieren mit vorzugsweise integriertem Facettieren, gegebenenfalls Warmbehandeln und Schmieden zu einer neuartigen Gesamtheit.The process advantageously combines the processes of cold or hot isostatic presses, Extrusion, sawing and calibration with preferably integrated faceting, if necessary Heat treatment and forging into a new whole.

Ausgangspunkt der Erfindung ist bei einer Ausführungsform der pulvermetallurgische Werkstoff Aluminium mit Si-Anteilen von ca. 14 % der unter anderem in einer Anwendung als Kettenrad gegen eine Stahlkette, als Rotor und Stator in einem Nockenwellenverstellersystem oder einer Ölpumpe hervorragende, bisher nicht gekannte, gute Verschleißeigenschaften besitzt.In one embodiment, the starting point of the invention is the powder metallurgical material Aluminum with Si fractions of approx. 14% which, among other things, is used in an application Sprocket against a steel chain, as a rotor and stator in a camshaft phasing system or an oil pump has excellent, previously unknown, good wear properties.

In bevorzugter Ausführung wird die Erfindung mit folgenden Verfahrensschritten umgesetzt:

  • Verpressen des Rohpulvers in einer Kalt- oder Heißisostatpresse zu einem Bolzen oder einer Form, die zum späteren Strangpressen geeignet ist. Vorteilhaft ist hier der Einsatz eines gepressten Bolzens aus Leichtmetallpulver, um im Gegensatz zu schmelzmetallurgisch hergestellten Bolzen ein gleichmäßigeres Gefüge ohne Lunker und Seigerungen etc. (mit gleichmäßig guter Si-Verteilung und damit guten Verschleißeigenschaften) zu erhalten;
  • Strangpressen des Bolzens nahe der Sintertemperatur des Leichtmetalls. Dabei Rekristallisation des Gefüges und Temperaturerhöhung bis zur optimalen Temperatur. Der Strangpressbolzen hat nun schon eine sehr gute Maßtoleranz, die für manche Bauteile schon genügen kann;
  • wenn die Maßtoleranz noch nicht ausreichend ist, um hochpräzise, einbaufertige Konturen zu erhalten, wird der stranggepresste Bolzen noch weiter nachkalibriert;
  • der Strangpressbolzen wird in das für das Bauteil später notwendige Maß in geeigneter Weise getrennt. Gegebenenfalls wird er dann noch warmbehandelt, einem Nachkalibrierarbeitsgang unterzogen und an definierten Kanten facettiert. Denkbar ist auch, den Strang als Ganzes in einer Art Ziehprozess auf genaue Maße zu bringen und danach zu trennen.
In a preferred embodiment, the invention is implemented with the following method steps:
  • Pressing the raw powder in a cold or hot isostatic press into a bolt or a mold that is suitable for later extrusion. It is advantageous here to use a pressed bolt made of light metal powder in order to obtain a more uniform structure without blowholes and segregations etc. (with uniformly good Si distribution and thus good wear properties), in contrast to bolts produced using melt metallurgy;
  • Extrusion of the bolt near the sintering temperature of the light metal. Thereby recrystallization of the structure and temperature increase up to the optimal temperature. The extrusion bolt now has a very good dimensional tolerance, which may be sufficient for some components;
  • if the dimensional tolerance is not yet sufficient to obtain high-precision, ready-to-install contours, the extruded bolt is recalibrated;
  • the extrusion billet is separated in a suitable manner to the extent later required for the component. If necessary, it is then heat treated, subjected to a recalibration process and faceted on defined edges. It is also conceivable to bring the strand as a whole to exact dimensions in a kind of drawing process and then to separate it.

Erfindungsgemäß wird die bei Sinterteilen übliche Präzision erzeugt. Die großen Verzüge wie im oben beschriebenen klassischen Sinterverfahren treten hier nicht mehr auf. Der hochverschleißfeste Werkstoff ist in engen Maßtoleranzen herstellbar.According to the invention, the precision that is customary in sintered parts is generated. The big delays like in the classic sintering process described above no longer occur here. The highly wear-resistant Material can be manufactured in close dimensional tolerances.

Claims (10)

  1. Process for the near net shape manufacture of components or semi-finished products from light-metal alloys which are difficult to machine, comprising the steps of:
    providing a powder material consisting of light metal and optionally hard-material particle additives as wear absorbers and/or other alloying-metal additives; then
    isostatically pressing the powder material to form a shaped body; and
    subjecting the shaped body to an extrusion operation at close to the sintering temperature of the light metal, without sintering the pressed shaped body prior to extrusion.
  2. Process according to Claim 1, in which the light metal used is aluminium.
  3. Process according to Claim 1 or 2, in which the alloying constituents comprise silicon, preferably 10 - 30% of Si, magnesium, preferably 0 - 3% of Mg, copper, preferably 0 - 5% of Cu, zinc, preferably 0 - 7% of Zn, iron, preferably 0 - 7% of Fe.
  4. Process according to one of Claims 1 to 3, in which the wear absorbers used are silicon and/or hard-material particle additives, in particular oxides, carbides and silicates, preferably in amounts of from 0-30%.
  5. Process according to one of Claims 1 to 4, in which the powder material is pressed hot-isostatically or cold-isostatically to form the shaped body.
  6. Process according to one of Claims 1 to 5, in which the extrusion is carried out in such a way that recrystallization of the microstructure and an increase in the temperature up to the optimum temperature occur.
  7. Process according to one of Claims 1 to 6, in which the pressed extrudate is divided up after extrusion, in particular divided up by a cutting operation to form components or semi-finished products of a single size.
  8. Process according to one of Claims 1 to 7, in which, after the extrudate has been divided up, further processing or sizing of the component or semi-finished product is carried out if predetermined properties or dimensional tolerances have not yet been reached, in particular by re-sizing and/or faceting.
  9. Process according to one of Claims 1 to 7, in which the extruded product is processed further by a drawing operation if predetermined properties or dimensional tolerances have not yet been reached, and the extruded product is then divided up.
  10. Process according to one of Claims 1 to 9, in which the extruded product is heat-treated.
EP01127413A 2001-07-20 2001-11-23 Process for preparing near net shaped workpieces from light metal alloys that are difficult to work Revoked EP1281461B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
KR10-2004-7000580A KR20040030054A (en) 2001-07-20 2002-07-22 Sinter metal parts with homogeneous distribution of non-homogeneously melting components and method for production thereof
CA002438397A CA2438397A1 (en) 2001-07-20 2002-07-22 Sintered metal parts with homogeneous distribution of non-homogeneously melting components and method for the production thereof
DE50201420T DE50201420D1 (en) 2001-07-20 2002-07-22 SINTER METAL PARTS WITH HOMOGENIC DISTRIBUTION OF NON-HOMOGENIC MELTING COMPONENTS, AND METHOD FOR THEIR PRODUCTION
BR0211267-1A BR0211267A (en) 2001-07-20 2002-07-22 Sintered metal parts with homogeneously distributed molten components as well as processes for their manufacture
PCT/DE2002/002692 WO2003011501A2 (en) 2001-07-20 2002-07-22 Sinter metal parts with homogeneous distribution of non-homogeneously melting components and method for the production thereof
DE10293319T DE10293319D2 (en) 2001-07-20 2002-07-22 Sintered metal parts with homogeneous distribution of non-homogeneously melting components, and process for their production
HU0401206A HUP0401206A2 (en) 2001-07-20 2002-07-22 Sinter metal parts with homogeneous distribution of non-homogeneously melting components and method for the production thereof
ES02754408T ES2231721T3 (en) 2001-07-20 2002-07-22 SINTERED METAL PARTS WITH HOMOGENOUS DISTRIBUTION OF COMPONENTS THAT ARE NOT FOUND HOMOGENOUSLY, AS WELL AS PROCEDURES FOR MANUFACTURING.
AT02754408T ATE280647T1 (en) 2001-07-20 2002-07-22 SINTERED METAL PARTS WITH HOMOGENEOUS DISTRIBUTION OF NON-HOMOGENEOUSLY MELTING COMPONENTS, AND METHOD FOR THEIR PRODUCTION
JP2003516724A JP2004536232A (en) 2001-07-20 2002-07-22 Sintered metal parts having a homogeneous distribution of components that melt inhomogeneously and a method of making the same
EP20020754408 EP1412113B1 (en) 2001-07-20 2002-07-22 Sinter metal parts with homogeneous distribution of non-homogeneously melting components and method for the production thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10135485A DE10135485A1 (en) 2001-07-20 2001-07-20 Process for the near-net-shape production of components or semi-finished products made of light-metal alloys that are difficult to machine, and component or semi-finished product produced by the method
DE10135485 2001-07-20

Publications (2)

Publication Number Publication Date
EP1281461A1 EP1281461A1 (en) 2003-02-05
EP1281461B1 true EP1281461B1 (en) 2004-09-01

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ID=7692559

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01127413A Revoked EP1281461B1 (en) 2001-07-20 2001-11-23 Process for preparing near net shaped workpieces from light metal alloys that are difficult to work
EP20020754408 Revoked EP1412113B1 (en) 2001-07-20 2002-07-22 Sinter metal parts with homogeneous distribution of non-homogeneously melting components and method for the production thereof

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20020754408 Revoked EP1412113B1 (en) 2001-07-20 2002-07-22 Sinter metal parts with homogeneous distribution of non-homogeneously melting components and method for the production thereof

Country Status (11)

Country Link
US (1) US20040208772A1 (en)
EP (2) EP1281461B1 (en)
JP (1) JP2004536232A (en)
KR (1) KR20040030054A (en)
AT (2) ATE275015T1 (en)
BR (1) BR0211267A (en)
CA (1) CA2438397A1 (en)
DE (4) DE10135485A1 (en)
ES (2) ES2227044T3 (en)
HU (1) HUP0401206A2 (en)
WO (1) WO2003011501A2 (en)

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CN105603271A (en) * 2016-01-27 2016-05-25 东莞佛亚铝业有限公司 High-silicon aluminum alloy wire and preparing method thereof

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US8377369B2 (en) * 2004-12-20 2013-02-19 Georgia Tech Research Corporation Density and hardness pressureless sintered and post-HIPed B4C
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Also Published As

Publication number Publication date
EP1412113B1 (en) 2004-10-27
DE10135485A1 (en) 2003-02-06
WO2003011501A3 (en) 2003-05-01
WO2003011501A2 (en) 2003-02-13
CA2438397A1 (en) 2003-02-13
JP2004536232A (en) 2004-12-02
EP1412113A2 (en) 2004-04-28
ES2231721T3 (en) 2005-05-16
DE50103474D1 (en) 2004-10-07
ATE280647T1 (en) 2004-11-15
ES2227044T3 (en) 2005-04-01
ATE275015T1 (en) 2004-09-15
KR20040030054A (en) 2004-04-08
DE10293319D2 (en) 2004-07-01
BR0211267A (en) 2004-08-03
EP1281461A1 (en) 2003-02-05
DE50201420D1 (en) 2004-12-02
US20040208772A1 (en) 2004-10-21
HUP0401206A2 (en) 2004-10-28

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