EP0964070A1 - Lead free Aluminium alloy based on AlCuMg with good machinability - Google Patents

Lead free Aluminium alloy based on AlCuMg with good machinability Download PDF

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Publication number
EP0964070A1
EP0964070A1 EP98810537A EP98810537A EP0964070A1 EP 0964070 A1 EP0964070 A1 EP 0964070A1 EP 98810537 A EP98810537 A EP 98810537A EP 98810537 A EP98810537 A EP 98810537A EP 0964070 A1 EP0964070 A1 EP 0964070A1
Authority
EP
European Patent Office
Prior art keywords
max
aluminum alloy
alloy
mpa
alloy according
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.)
Ceased
Application number
EP98810537A
Other languages
German (de)
French (fr)
Inventor
Jiri Faltus
Karel Placek
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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 Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to EP98810537A priority Critical patent/EP0964070A1/en
Priority to PCT/CH1999/000231 priority patent/WO1999066090A1/en
Priority to EP99920526A priority patent/EP1093529A1/en
Publication of EP0964070A1 publication Critical patent/EP0964070A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C22F1/057—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 copper as the next major constituent
    • 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
    • C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium

Definitions

  • the alloy preferably contains 0.15 to 0.25% by weight bismuth.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Extrusion Of Metal (AREA)
  • Continuous Casting (AREA)

Abstract

A free-machining aluminum-copper-magnesium alloy, containing tin as chip-breaking additive, is new. An aluminum-copper-magnesium alloy with good machinability contains 0.7-1.5 wt. % tin as chip-breaking additive. Preferred Features: The alloy has the composition (by wt.) 3.9-5.2% Cu, 0.3-1.3% Mg, 0.3-1.0% Mn, 0.7-1.5% Sn, NOTGREATER 0.40% Bi, NOTGREATER 0.8% Fe, NOTGREATER 0.8% Si, NOTGREATER 0.5% Zn, NOTGREATER 0.15% Cr, NOTGREATER 0.20% Ti, NOTGREATER 0.05% each ( NOTGREATER 0.15% total) other elements and balance Al.

Description

Die Erfindung betrifft eine Aluminiumlegierung auf Basis AlCuMg mit guter Spanbarkeit.The invention relates to an aluminum alloy based on AlCuMg with good Machinability.

Als Automatenwerkstoffe geeignete Knetlegierungen auf Basis AlCuMg enthalten als spanbrechenden Zusatz Blei. Gemäss EN 573:1994 werden diese Legierungen mit EN AW-AlCu4PbMgMn (EN AW-2007) und EN AW-AlCu4PbMg (EN AW-2030) bezeichnet.Contain wrought alloys based on AlCuMg as machine materials as a chip breaking additive lead. According to EN 573: 1994 these are Alloys with EN AW-AlCu4PbMgMn (EN AW-2007) and EN AW-AlCu4PbMg (EN AW-2030).

Wegen der gesundheitsschädlichen Wirkung von Blei ist man gegenwärtig bemüht, dessen Anwendung in der Industrie auf ein Minimum zu beschränken. Hinzu kommt, dass die Anwesenheit von Blei in einer Aluminium-Knetlegierung bei üblichen Temperaturen zu einer Erhöhung der Rissanfälligkeit unter Dauerbelastung führt.Because of the harmful effects of lead, efforts are currently being made to limit its application in industry to a minimum. In addition, the presence of lead in a wrought aluminum alloy at normal temperatures to an increase in susceptibility to cracking under permanent load leads.

Der Erfindung liegt daher die Aufgabe zugrunde, eine als Automatenwerkstoff geeignete bleifreie Aluminiumlegierung mit guter Spanbarkeit bereitzustellen, die gegenüber bekannten Automatenwerkstoffen auf Basis AlCuMg vergleichbare oder bessere mechanische Eigenschaften aufweist.The invention is therefore based on the object, as a machine material to provide suitable lead-free aluminum alloy with good machinability, the comparable to known machine materials based on AlCuMg or has better mechanical properties.

Zur erfindungsgemässen Lösung der Aufgabe führt, dass die Legierung 0.7 bis 1.5 Gew.-% Zinn als spanbrechenden Zusatz enthält.To achieve the object according to the invention, the alloy 0.7 to Contains 1.5% by weight of tin as a chip-breaking additive.

Eine bevorzugte Aluminiumlegierung enthält in Gew.-% Kupfer 3.9 bis 5.2 Magnesium 0.3 bis 1.3 Mangan 0.3 bis 1.0 Zinn 0.7 bis 1.5 Wismut max. 0.40 Eisen max. 0.8 Silizium max. 0.8 Zink max. 0.5 Chrom max. 0.15 Titan max. 0.20 sowie unvermeidliche Begleitelemente einzeln max. 0.05, insgesamt max. 0.15 und Aluminium als Rest.A preferred aluminum alloy contains in% by weight copper 3.9 to 5.2 magnesium 0.3 to 1.3 manganese 0.3 to 1.0 tin 0.7 to 1.5 bismuth Max. 0.40 iron Max. 0.8 silicon Max. 0.8 zinc Max. 0.5 chrome Max. 0.15 titanium Max. 0.20 as well as unavoidable accompanying elements individually max. 0.05, total max. 0.15 and aluminum as the rest.

Der Vorzugsbereich für Zinn liegt bei 0.8 bis 1.3, insbesondere 0.9 bis 1.2 Gew.-%.The preferred range for tin is 0.8 to 1.3, especially 0.9 to 1.2 % By weight.

Bevorzugt enthält die Legierung 0.15 bis 0.25 Gew.-% Wismut.The alloy preferably contains 0.15 to 0.25% by weight bismuth.

Die erfindungsgemässe Legierung kann in bekannter Art durch Stranggiessen und Strangpressen verarbeitet werden. Üblicherweise werden die stranggegossenen Barren einer Hochglühung unterworfen. Die stranggepressten Erzeugnisse werden sodann durch eine Wärmebehandlung oder thermomechanische Verarbeitung in verschiedene Endzustände überführt.The alloy according to the invention can be cast in a known manner and extrusion are processed. Usually the continuous cast Ingots subjected to a high heat treatment. Extruded products are then subjected to heat treatment or thermomechanical Processing transferred to different final states.

Für die erfindungsgemässe Legierung eignen sich zur Erzielung unterschiedlicher Auslagerungszustände die folgenden Wärmebehandlungsverfahren:

  • Lösungsglühen mit nachfolgender Warmaushärtung
  • Lösungsglühen, Abbau innerer Spannungen durch Recken in geeignetem Umfang mit nachfolgender Warmaushärtung
  • Lösungsglühen mit nachfolgender Kaltaushärtung während mindestens drei Tagen
  • Lösungsglühen, Abbau innerer Spannungen durch Recken in geeignetem Umfang mit nachfolgender Kaltaushärtung während mindestens drei Tagen
The following heat treatment methods are suitable for the alloy according to the invention in order to achieve different aging conditions:
  • Solution annealing with subsequent heat curing
  • Solution annealing, reduction of internal stresses by stretching to a suitable extent with subsequent heat curing
  • Solution annealing with subsequent cold curing for at least three days
  • Solution annealing, reduction of internal stresses by stretching to a suitable extent with subsequent cold hardening for at least three days

Die erfindungsgemässe Legierung eignet sich besonders für die Bearbeitung auf Automaten.The alloy according to the invention is particularly suitable for processing on machines.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen näher erläutert.The invention is explained in more detail below on the basis of exemplary embodiments.

In einem Tiegelwiderstandsofen wurden zwei Legierungen mit einer Zusammensetzung gemäss Tabelle 1 aus Aluminium 99.5, Magnesium 99.9, Zinn 99.95, Wismut 99.9 sowie Vorlegierungen AlCu 45, AlMn10 und AlTi 6 erschmolzen. Aus jeder Schmelzcharge wurden durch Stranggiessen mittels einer wassergekühlten Kokille aus einer Aluminiumlegierung unter Anwendung eines Schmiermittels Bolzen mit einem Durchmesser von 205 mm abgegossen. Nach dem Abdrehen auf einen Durchmesser von 185 mm wurden die Bolzen hochgeglüht. Nach dem Sägen auf geeignete Länge und Anwärmen in einem Induktionsofen wurden die Bolzen zu Stangen mit einem Durchmesser von 36 mm stranggepresst.Two alloys with one composition were placed in a crucible resistance furnace according to Table 1 made of aluminum 99.5, magnesium 99.9, tin 99.95, bismuth 99.9 and master alloys AlCu 45, AlMn10 and AlTi 6 melted. From each batch of melt were made by continuous casting using a water-cooled mold made of an aluminum alloy poured a lubricant bolt with a diameter of 205 mm. After turning to a diameter of 185 mm, the bolts were annealed. After sawing to a suitable length and warming up in one The induction furnace turned the bolts into rods with a diameter of 36 mm extruded.

Die auf diese Weise hergestellten Presslinge wurden durch unterschiedliche Wärmebehandlungsverfahren auf die gewünschten Endzustände verarbeitet. Die mechanischen Eigenschaften der erfindungsgemässen Legierungen sind in Tabelle 2 zusammengestellt. Si Fe Cu Mn Mg Cr Ti Sn Bi Sonstige Rest einzeln max. Gesamt max. 0.12 0.11 4.00 0.52 0.40 0.062 0.042 1.09 0.19 0.05 0.15 Al 0.10 0.11 4.12 0.50 0.83 0.036 0.053 1.13 0.19 0.05 0.15 Al Endzustand gemäss Norm EN 515 Rp 0.2 (MPa) Rm (MPa) A5 (%) HB T6, T6510 T6511 min. 310 min. 420 min. 9 115 T4, T4510 T4511 min. 290 min. 400 min. 11 110 The compacts produced in this way were processed to the desired final states by different heat treatment processes. The mechanical properties of the alloys according to the invention are summarized in Table 2. Si Fe Cu Mn Mg Cr Ti Sn Bi Other rest individually max. Total max. 0.12 0.11 4.00 0.52 0.40 0.062 0.042 1.09 0.19 0.05 0.15 Al 0.10 0.11 4.12 0.50 0.83 0.036 0.053 1.13 0.19 0.05 0.15 Al Final state according to standard EN 515 Rp 0.2 (MPa) Rm (MPa) A5 (%) HB T6, T6510 T6511 min. 310 min. 420 min. 9 115 T4, T4510 T4511 min. 290 min. 400 min. 11 110

Die in Tabelle 2 verwendeten Kurzbezeichnungen bedeuten:

Rp 0.2
Dehngrenze
Rm
Zugfestigkeit
A5
Bruchdehnung
H
B Brinellhärte
The short names used in Table 2 mean:
Rp 0.2
Proof stress
Rm
tensile strenght
A5
Elongation at break
H
B Brinell hardness

Claims (7)

Aluminlumlegierung auf Basis AlCuMg mit guter Spanbarkeit,
dadurch gekennzeichnet, dass
die Legierung 0.7 bis 1.5 Gew.-% Zinn als spanbrechenden Zusatz enthält.Aluminum alloy based on AlCuMg with good machinability,
characterized in that
the alloy contains 0.7 to 1.5% by weight of tin as a chip-breaking additive. Aluminiumlegierung nach Anspruch 1, dadurch gekennzeichnet, dass die Legierung in Gew.-% Kupfer 3.9 bis 5.2 Magnesium 0.3 bis 1.3 Mangan 0.3 bis 1.0 Zinn 0.7 bis 1.5 Wismut max. 0.40 Eisen max. 0.8 Silizium max. 0.8 Zink max. 0.5 Chrom max. 0.15 Titan max. 0.20
sowie unvermeidliche Begleitelemente einzeln max. 0.05, insgesamt max. 0.15 und Aluminium als Rest enthält.Aluminum alloy according to claim 1, characterized in that the alloy in wt .-% copper 3.9 to 5.2 magnesium 0.3 to 1.3 manganese 0.3 to 1.0 tin 0.7 to 1.5 bismuth Max. 0.40 iron Max. 0.8 silicon Max. 0.8 zinc Max. 0.5 chrome Max. 0.15 titanium Max. 0.20
as well as unavoidable accompanying elements individually max. 0.05, total max. 0.15 and aluminum as the rest. Aluminiumlegierung nach Anspruch 2, dadurch gekennzeichnet, dass die Legierung 0.8 bis 1.3 Gew.-%, vorzugsweise 0.9 bis 1.2 Gew.-% Zinn enthält.Aluminum alloy according to claim 2, characterized in that the Alloy contains 0.8 to 1.3 wt .-%, preferably 0.9 to 1.2 wt .-% tin. Aluminiumlegierung nach Anspruch 2, dadurch gekennzeichnet, dass die Legierung 0.15 bis 0.25 Gew.-% Wismut enthält. Aluminum alloy according to claim 2, characterized in that the Alloy contains 0.15 to 0.25% by weight bismuth. Aluminlumlegierung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Legierung nach Stranggiessen, Hochglühen und Strangpressen mit nachfolgendem Lösungsglühen bzw. raschem Abkühlen aus der Presshitze, ggf. Recken, und nach Warmauslagern auf maximalen Aushärtungsgrad eine Zugfestigkeit von mindestens 420 MPa, eine Dehngrenze von mindestens 310 MPa, eine Brinellhärte von mindestems 115 sowie eine Bruchdehnung A5 von mindestens 9% aufweist.Aluminum alloy according to one of claims 1 to 4, characterized in that that the alloy after continuous casting, annealing and Extrusion followed by solution annealing or rapid cooling from the press heat, if necessary stretching, and after hot aging to maximum Degree of curing a tensile strength of at least 420 MPa, a Yield strength of at least 310 MPa, a Brinell hardness of at least 115 and an elongation at break A5 of at least 9%. Aluminiumlegierung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Legierung nach Stranggiessen, Hochglühen und Strangpressen mit nachfolgendem Lösungsglühen bzw. raschem Abkühlen aus der Presshitze, ggf. Recken, und nach Kaltauslagern während mindestens drei Tagen eine Zugfestigkeit von mindestens 400 MPa, eine Dehngrenze von mindestens 290 MPa, eine Brinellhärte von mindestens 110 sowie eine Bruchdehnung A5 von mindestens 11% aufweist.Aluminum alloy according to one of claims 1 to 4, characterized in that that the alloy after continuous casting, annealing and Extrusion followed by solution annealing or rapid cooling from the press heat, if necessary stretching, and after cold aging during a tensile strength of at least 400 MPa, at least three days Yield strength of at least 290 MPa, a Brinell hardness of at least 110 and an elongation at break A5 of at least 11%. Verwendung einer Aluminiumlegierung nach einem der Ansprüche 1 bis 6 für die Bearbeitung auf Automaten.Use of an aluminum alloy according to one of claims 1 to 6 for processing on machines.
EP98810537A 1998-06-12 1998-06-12 Lead free Aluminium alloy based on AlCuMg with good machinability Ceased EP0964070A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP98810537A EP0964070A1 (en) 1998-06-12 1998-06-12 Lead free Aluminium alloy based on AlCuMg with good machinability
PCT/CH1999/000231 WO1999066090A1 (en) 1998-06-12 1999-05-28 Lead free aluminium alloy based on a mixture of aluminium-copper-magnesium with good machining capacity
EP99920526A EP1093529A1 (en) 1998-06-12 1999-05-28 Lead free aluminium alloy based on a mixture of aluminium-copper-magnesium with good machining capacity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810537A EP0964070A1 (en) 1998-06-12 1998-06-12 Lead free Aluminium alloy based on AlCuMg with good machinability

Publications (1)

Publication Number Publication Date
EP0964070A1 true EP0964070A1 (en) 1999-12-15

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EP98810537A Ceased EP0964070A1 (en) 1998-06-12 1998-06-12 Lead free Aluminium alloy based on AlCuMg with good machinability
EP99920526A Ceased EP1093529A1 (en) 1998-06-12 1999-05-28 Lead free aluminium alloy based on a mixture of aluminium-copper-magnesium with good machining capacity

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP99920526A Ceased EP1093529A1 (en) 1998-06-12 1999-05-28 Lead free aluminium alloy based on a mixture of aluminium-copper-magnesium with good machining capacity

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WO (1) WO1999066090A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000037697A1 (en) * 1998-12-22 2000-06-29 Impol, Industrija Metalnih Polizdelkov, D.D. Aluminum free-cutting alloy, processes for the production thereo f and use thereof
WO2002020862A2 (en) * 2000-09-04 2002-03-14 Impol, Industrija Metalnih Polizdelkov, D.D. Aluminum free cutting alloys, recycling process for the manufacture thereof and their use
CN106119629A (en) * 2016-08-25 2016-11-16 上海交通大学 Cutting free particle enhanced aluminum-based composite material and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0797653A (en) * 1993-09-29 1995-04-11 Sumitomo Light Metal Ind Ltd Cast bar of free cutting aluminum alloy
US5587029A (en) * 1994-10-27 1996-12-24 Reynolds Metals Company Machineable aluminum alloys containing In and Sn and process for producing the same
EP0761834A1 (en) * 1995-08-24 1997-03-12 KAISER ALUMINUM & CHEMICAL CORPORATION Lead-free 6000 series aluminium alloy
US5725694A (en) * 1996-11-25 1998-03-10 Reynolds Metals Company Free-machining aluminum alloy and method of use
EP0828008A2 (en) * 1996-09-09 1998-03-11 Alusuisse Technology & Management AG Aluminium alloy with good machinability

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0797653A (en) * 1993-09-29 1995-04-11 Sumitomo Light Metal Ind Ltd Cast bar of free cutting aluminum alloy
US5587029A (en) * 1994-10-27 1996-12-24 Reynolds Metals Company Machineable aluminum alloys containing In and Sn and process for producing the same
EP0761834A1 (en) * 1995-08-24 1997-03-12 KAISER ALUMINUM & CHEMICAL CORPORATION Lead-free 6000 series aluminium alloy
EP0828008A2 (en) * 1996-09-09 1998-03-11 Alusuisse Technology & Management AG Aluminium alloy with good machinability
US5725694A (en) * 1996-11-25 1998-03-10 Reynolds Metals Company Free-machining aluminum alloy and method of use

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUFNAGEL W.: "Aluminium-Taschenbuch, ED. 14", 1983, ALUMINIUM VERLAG, DÜSSELDORF, XP002079025 *
PATENT ABSTRACTS OF JAPAN vol. 095, no. 007 31 August 1995 (1995-08-31) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000037697A1 (en) * 1998-12-22 2000-06-29 Impol, Industrija Metalnih Polizdelkov, D.D. Aluminum free-cutting alloy, processes for the production thereo f and use thereof
US6248188B1 (en) * 1998-12-22 2001-06-19 Impol Aluminum Corporation Free-cutting aluminum alloy, processes for the production thereof and use thereof
US6423163B2 (en) 1998-12-22 2002-07-23 Impol Aluminum Corporation Process for the manufacture of a free-cutting aluminum alloy
CZ299841B6 (en) * 1998-12-22 2008-12-10 Impol, Industrija Metalnih Polizdelkov, D. D. Process for working and thermal treatment of alloy
WO2002020862A2 (en) * 2000-09-04 2002-03-14 Impol, Industrija Metalnih Polizdelkov, D.D. Aluminum free cutting alloys, recycling process for the manufacture thereof and their use
WO2002020862A3 (en) * 2000-09-04 2002-05-16 Impol Ind Metalnih Polizdelkov Aluminum free cutting alloys, recycling process for the manufacture thereof and their use
CN106119629A (en) * 2016-08-25 2016-11-16 上海交通大学 Cutting free particle enhanced aluminum-based composite material and preparation method thereof

Also Published As

Publication number Publication date
WO1999066090A1 (en) 1999-12-23
EP1093529A1 (en) 2001-04-25

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