EP0982410A1 - Aluminium alloy with good machinability - Google Patents

Aluminium alloy with good machinability Download PDF

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Publication number
EP0982410A1
EP0982410A1 EP99121526A EP99121526A EP0982410A1 EP 0982410 A1 EP0982410 A1 EP 0982410A1 EP 99121526 A EP99121526 A EP 99121526A EP 99121526 A EP99121526 A EP 99121526A EP 0982410 A1 EP0982410 A1 EP 0982410A1
Authority
EP
European Patent Office
Prior art keywords
aluminum alloy
max
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.)
Withdrawn
Application number
EP99121526A
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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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=5465300&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0982410(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Publication of EP0982410A1 publication Critical patent/EP0982410A1/en
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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
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium 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
    • C22C21/003—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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent

Definitions

  • the invention relates to an aluminum alloy according to the Preamble of claim 1.
  • Wrought alloys suitable as machine materials on the Basis AlCu and AlMgSi contain as a chip-breaking additive Lead, possibly in combination with bismuth. Alloys of this type are designated according to EN 573: 1994 as follows: EN AW-AlCu6BiPb, possibly EN AW-AlCu6BiPb (A) and EN AW-AlMg1SiPb, EN AW-AlMg1SiPbMn, possibly EN AW-AlMgSiPb.
  • the inventor has the Task, a suitable as a machine material, to provide lead-free aluminum alloy with good machinability, compared to conventional machine materials comparable or better mechanical properties having.
  • the preferred range lies in the alloy according to the invention for bismuth at 0.4 to 0.9, especially 0.6 to 0.8 % By weight, the preferred range for tin at 0.3 to 0.6, in particular 0.4 to 0.6% by weight.
  • the alloy according to the invention can in a known manner semi-continuous casting and extrusion processed become. Usually they become semi-continuous continuously cast ingots subjected to an annealing; however, this can also be omitted. Extruded products are then by heat treatment or thermomechanical processing in various final states transferred.

Abstract

Aluminum alloy contains (in wt.%) 4.6-6.0 copper, 0.2-1.0 bismuth, 0.2-0.7 tin, maximum 0,45 zinc, maximum 0.7 iron, maximum 0.4 silicon, and maximum 0.15 impurities.

Description

Die Erfindung betrifft eine Aluminiumlegierung nach dem Oberbegriff von Anspruch 1.The invention relates to an aluminum alloy according to the Preamble of claim 1.

Als Automatenwerkstoffe geeignete Knetlegierungen auf der Basis AlCu und AlMgSi enthalten als spanbrechenden Zusatz Blei, ggf. in Kombination mit Wismut. Derartige Legierungen werden gemäss EN 573:1994 wie folgt bezeichnet: EN AW-AlCu6BiPb, ggf. EN AW-AlCu6BiPb(A) und EN AW-AlMg1SiPb, EN AW-AlMg1SiPbMn, ggf. EN AW-AlMgSiPb.Wrought alloys suitable as machine materials on the Basis AlCu and AlMgSi contain as a chip-breaking additive Lead, possibly in combination with bismuth. Alloys of this type are designated according to EN 573: 1994 as follows: EN AW-AlCu6BiPb, possibly EN AW-AlCu6BiPb (A) and EN AW-AlMg1SiPb, EN AW-AlMg1SiPbMn, possibly EN AW-AlMgSiPb.

Wegen der gesundsheitsschädlichen Wirkung von Blei ist man derzeit bemüht, dessen Anwendung in der Industrie auf ein Minimum zu beschränken. Hinzu kommt, dass bereits die Anwesenheit kleiner Bleimengen in einer Aluminium-Knetlegierung zu einer Erhöhung der Spannungsrissanfälligkeit unter Dauerbelastung bei Raumtemperatur führt.Because of the harmful effects of lead one is currently striving to apply it to an industry To limit minimum. Add to that the presence already small amounts of lead in a wrought aluminum alloy to an increase in susceptibility to stress cracking under permanent load leads at room temperature.

Angesichts dieser Gegebenheiten hat sich der Erfinder die Aufgabe gestellt, eine als Automatenwerkstoff geeignete, bleifreie Aluminiumlegierung mit guter Spanbarkeit bereitzustellen, die gegenüber herkömmlichen Automatenwerkstoffen vergleichbare oder bessere mechanische Eigenschaften aufweist.In view of these circumstances, the inventor has the Task, a suitable as a machine material, to provide lead-free aluminum alloy with good machinability, compared to conventional machine materials comparable or better mechanical properties having.

Zur erfindungsgemässen Lösung der Aufgabe führt eine Legierung mit den Merkmalen von Anspruch 1.An alloy leads to the achievement of the object according to the invention with the features of claim 1.

Bei der erfindungsgemässen Legierung liegt der Vorzugsbereich für Wismut bei 0,4 bis 0,9, insbesondere 0,6 bis 0,8 Gew.-%, der Vorzugsbereich für Zinn bei 0,3 bis 0,6, insbesondere 0,4 bis 0,6 Gew.-%.The preferred range lies in the alloy according to the invention for bismuth at 0.4 to 0.9, especially 0.6 to 0.8 % By weight, the preferred range for tin at 0.3 to 0.6, in particular 0.4 to 0.6% by weight.

Die erfindungsgemässe Legierung kann in bekannter Art durch halbkontinuierliches Stranggiessen und Strangpressen verarbeitet werden. Ueblicherweise werden die halbkontinuierlich stranggegossenen Barren einer Hochglühung unterworfen; diese kann jedoch auch entfallen. Die stranggepressten Erzeugnisse werden sodann durch eine Wärmebehandlung oder thermomechanische Verarbeitung in verschiedene Endzustände überführt.The alloy according to the invention can in a known manner semi-continuous casting and extrusion processed become. Usually they become semi-continuous continuously cast ingots subjected to an annealing; however, this can also be omitted. Extruded products are then by heat treatment or thermomechanical processing in various final states transferred.

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

  • Lösungsglühen mit nachfolgender Warmaushärtung
  • Lösungsglühen, Abbau innerer Spannungen durch Recken, nachfolgende Warmaushärtung
  • Lösungsglühen, Kaltverformung 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, subsequent heat curing
  • Solution annealing, cold working with subsequent cold curing for at least three days

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen näher erläutert.The invention is described below using exemplary embodiments explained in more detail.

In einem Tiegelwiderstandsofen wurden drei Legierungen mit einer Zusammensetzung gemäss Tabelle 1 aus Aluminium 99,5, einer Vorlegierung AlCu 45, Zinn 99,95 und Wismut 99,9 erschmolzen. Aus jeder Schmelzcharge wurden durch halbkontinuierliches Stranggiessen mittels einer wassergekühlten Kokille aus einer Aluminiumlegierung unter Anwendung eines Schmiermittels Bolzen mit einem Durchmesser von 135 mm abgegossen. Nach dem Abdrehen auf einen Durchmesser von 110 mm wurde ein Teil der Bolzen hochgeglüht, ein anderer Teil wurde ohne Hochglühung im Gusszustand belassen. Nach Anwärmung auf Strangpresstemperatur in einem Durchlaufinduktionsofen wurden die Bolzen zu Stangen mit einem Durchmesser von 36 mm sowie zu Sechskantprofilen stranggepresst.Three alloys were used in a crucible resistance furnace a composition according to Table 1 made of aluminum 99.5, a master alloy AlCu 45, tin 99.95 and bismuth 99.9 melted. Each batch of melt was made semi-continuous Continuous casting using a water-cooled Aluminum alloy mold using a Lubricant casted bolts with a diameter of 135 mm. After turning to a diameter of 110 mm part of the bolts was annealed, another part was Leave in the as-cast state without superheating. After warming up to extrusion temperature in a continuous induction furnace the bolts became rods with a diameter of 36 mm as well as extruded into hexagonal profiles.

Die auf diese Weise hergestellten Strangpresserzeugnisse wurden durch unterschiedliche Wärmebehandlungen auf die gewünschten Endzustände verarbeitet. Die mit den verschiedenen Wärmebehandlungsverfahren erzeugten Endzustände und die mechanischen Eigenschaften der erfindungsgemässen Legierung sind in Tabelle 2 zusammengestellt. Si Fe Cu Sn Bi Zn sonstige Rest einzeln max. gesamt max. 0,11 0,21 5,06 0,49 0,60 0,42 0,05 0,15 Al 0,16 0,27 5,67 0,52 0,72 0,41 0,05 0,15 Al 0,10 0,16 5,24 0,50 0,63 0,02 0,05 0,15 Al Zustand nach EN 515 Rp 0,2 (MPa) Rm (MPa) A5 (%) HB T6, T651 min. 280 min. 370 min. 10 110 T3 min. 150 min. 270 min. 20 80 The extruded products produced in this way were processed to the desired end states by different heat treatments. The final states generated with the various heat treatment processes and the mechanical properties of the alloy according to the invention are summarized in Table 2. Si Fe Cu Sn Bi Zn other rest individually max. total max. 0.11 0.21 5.06 0.49 0.60 0.42 0.05 0.15 Al 0.16 0.27 5.67 0.52 0.72 0.41 0.05 0.15 Al 0.10 0.16 5.24 0.50 0.63 0.02 0.05 0.15 Al Condition according to EN 515 Rp 0.2 (MPa) Rm (MPa) A5 (%) HB T6, T651 min. 280 min. 370 min. 10th 110 T3 min. 150 min. 270 min. 20th 80

Die in Tabelle 2 verwendeten Kurzbezeichnungen bedeuten:

EN 515
Europäische Norm EN 515: 1993 Aluminium und Aluminiumlegierungen-Halbzeug-Bezeichnung der Werkstoffzustände
Rp 0,2
Streckgrenze
Rm
Zugfestigkeit
A5
Bruchdehnung
HB
Brinellhärte
The short names used in Table 2 mean:
EN 515
European standard EN 515: 1993 aluminum and aluminum alloy semi-finished product description of the material states
Rp 0.2
Stretch limit
Rm
tensile strenght
A5
Elongation at break
HB
Brinell hardness

Claims (6)

Aluminiumlegierung mit guter Spanbarkeit, dadurch gekennzeichnet, dass die Legierung in Gew.-% Kupfer 4,6 bis 6,0 Wismut 0,2 bis 1,0 Zinn 0,2 bis 0,7 Zink max. 0,45 Eisen max. 0,7 Silizium max. 0,4
sowie unvermeidbare Verunreinigungen einzeln max. 0,05, insgesamt max. 0,15 und Aluminuium als Rest enthält.Aluminum alloy with good machinability, characterized in that the alloy in wt .-% copper 4.6 to 6.0 bismuth 0.2 to 1.0 tin 0.2 to 0.7 zinc Max. 0.45 iron Max. 0.7 silicon Max. 0.4
and unavoidable impurities individually max. 0.05, total max. 0.15 and aluminum contains the rest. Aluminiumlegierung nach Anspruch 1, dadurch gekennzeichnet, dass die Legierung 0,4 bis 0,9 Gew.-%, vorzugsweise 0,6 bis 0,8 Gew.-% Wismut enthält.Aluminum alloy according to claim 1, characterized in that the alloy 0.4 to 0.9 wt .-%, preferably Contains 0.6 to 0.8 wt% bismuth. Aluminiumlegierung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Legierung 0,3 bis 0,6 Gew.-%, vorzugsweise 0,4 bis 0,6 Gew.-% Zinn enthält.Aluminum alloy according to claim 1 or 2, characterized in that that the alloy 0.3 to 0.6 wt .-%, preferably contains 0.4 to 0.6% by weight of tin. Aluminiumlegierung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Legierung nach halbkontinuierlichem Stranggiessen, Hochglühen und Strangpressen mit nachfolgendem Lösungsglühen, Abschrecken und Warmauslagern auf maximalen Aushärtungsgrad eine Zugfestigkeit von mindestens 370 MPa, eine Streckgrenze von mindestens 280 MPa, eine Brinellhärte von mindestens 110 sowie eine Bruchdehnung A5 von mindestens 10% aufweist.Aluminum alloy according to one of claims 1 to 3, characterized in that the alloy is semi-continuous Continuous casting, annealing and extrusion with subsequent solution annealing, quenching and hot aging to a maximum degree of curing Tensile strength of at least 370 MPa, a yield strength of at least 280 MPa, a Brinell hardness of at least 110 and an elongation at break A5 of at least 10%. Aluminiumlegierung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Legierung nach halbkontinuierlichem Stranggiessen, Hochglühen und Strangpressen mit nachfolgendem Lösungsglühen, Abschrecken und Warmauslagern auf weniger als maximalen Aushärtungsgrad eine Zugfestigkeit von mindestens 270 MPa, eine Streckgrenze von mindestens 150 MPa, eine Brinellhärte von mindestens 80 sowie eine Bruchdehnung A5 von mindestens 20% aufweist.Aluminum alloy according to one of claims 1 to 3, characterized in that the alloy is semi-continuous Continuous casting, annealing and extrusion with subsequent solution annealing, quenching and hot aging to less than the maximum degree of curing a tensile strength of at least 270 MPa, a yield strength of at least 150 MPa, a Brinell hardness of at least 80 and an elongation at break A5 of has at least 20%. Verwendung einer Aluminiumlegierung nach einem der Ansprüche 1 bis 5 als Automatenwerkstoff.Use of an aluminum alloy according to one of the claims 1 to 5 as machine material.
EP99121526A 1996-09-09 1997-08-28 Aluminium alloy with good machinability Withdrawn EP0982410A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CZ19962628A CZ286150B6 (en) 1996-09-09 1996-09-09 Aluminium alloy with excellent machinability
CZ262896 1996-09-09
EP97810609A EP0828008B1 (en) 1996-09-09 1997-08-28 Aluminium alloy with good machinability

Related Parent Applications (1)

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EP97810609A Division EP0828008B1 (en) 1996-09-09 1997-08-28 Aluminium alloy with good machinability

Publications (1)

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EP0982410A1 true EP0982410A1 (en) 2000-03-01

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EP99121526A Withdrawn EP0982410A1 (en) 1996-09-09 1997-08-28 Aluminium alloy with good machinability
EP97810609A Revoked EP0828008B1 (en) 1996-09-09 1997-08-28 Aluminium alloy with good machinability

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Country Status (7)

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EP (2) EP0982410A1 (en)
AT (1) ATE194393T1 (en)
CZ (1) CZ286150B6 (en)
DE (1) DE59701965D1 (en)
HU (1) HUP9701466A3 (en)
PL (1) PL183835B1 (en)
SI (1) SI9700232A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004033740A1 (en) * 2002-10-09 2004-04-22 Showa Denko K.K. Aluminum alloy for cutting processing, and aluminum alloy worked article made of the same
US6780375B2 (en) 2002-04-25 2004-08-24 The Furukawa Electric Co., Ltd. Aluminum alloy with good cuttability, method for producing a forged article, and forged article
WO2005038278A1 (en) * 2003-09-20 2005-04-28 Ks Gleitlager Gmbh Plain bearing composite material
DE102007049531B3 (en) * 2007-10-15 2009-05-07 Willy Kreutz Gmbh & Co. Kg Method for producing a contact pin for a fluorescent tube
CN101363091B (en) * 2008-09-08 2010-06-02 营口华润有色金属制造有限公司 High-silicon aluminum alloy and method for preparing same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0964070A1 (en) * 1998-06-12 1999-12-15 Alusuisse Technology & Management AG Lead free Aluminium alloy based on AlCuMg with good machinability
SI20122A (en) * 1998-12-22 2000-06-30 Impol, Industrija Metalnih Polizdelkov, D.D. Aluminium casting-automate alloy, process for its production and application
CN101709444B (en) * 2009-12-18 2011-03-16 中国铝业股份有限公司 Thermal treatment method for lead-free aluminum alloy
ES2549135T3 (en) * 2012-05-15 2015-10-23 Constellium Extrusions Decin S.R.O. Improved forging aluminum alloy product for the palletizing and manufacturing process
CN111394601B (en) * 2020-03-25 2021-05-25 广东领胜新材料科技有限公司 Casting method of large-size lead-free-cutting aluminum alloy cast rod
CN112410692A (en) * 2020-11-28 2021-02-26 四川航天长征装备制造有限公司 2219 aluminum alloy grain refining process
CN113578997B (en) * 2021-08-03 2024-02-02 南京超明精密合金材料有限公司 Processing technology of super-easy-cutting precision alloy rod wire

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JPH0285331A (en) * 1988-09-19 1990-03-26 Furukawa Alum Co Ltd Aluminum alloy having excellent cross feed machinability and its manufacture
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WO1996013617A1 (en) * 1994-10-27 1996-05-09 Reynolds Metals Company Machineable aluminum alloys containing in and sn and process for producing the same

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Publication number Priority date Publication date Assignee Title
JPH0285331A (en) * 1988-09-19 1990-03-26 Furukawa Alum Co Ltd Aluminum alloy having excellent cross feed machinability and its manufacture
JPH0339442A (en) * 1989-07-06 1991-02-20 Furukawa Alum Co Ltd Aluminum free cutting alloy for hot forging
JPH07197165A (en) * 1993-12-28 1995-08-01 Furukawa Electric Co Ltd:The High wear resistant free cutting aluminum alloy and its production
WO1996013617A1 (en) * 1994-10-27 1996-05-09 Reynolds Metals Company Machineable aluminum alloys containing in and sn and process for producing the same

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6780375B2 (en) 2002-04-25 2004-08-24 The Furukawa Electric Co., Ltd. Aluminum alloy with good cuttability, method for producing a forged article, and forged article
WO2004033740A1 (en) * 2002-10-09 2004-04-22 Showa Denko K.K. Aluminum alloy for cutting processing, and aluminum alloy worked article made of the same
WO2005038278A1 (en) * 2003-09-20 2005-04-28 Ks Gleitlager Gmbh Plain bearing composite material
US7601434B2 (en) 2003-09-20 2009-10-13 Ks Gleitlager Gmbh Plain bearing composite material
DE102007049531B3 (en) * 2007-10-15 2009-05-07 Willy Kreutz Gmbh & Co. Kg Method for producing a contact pin for a fluorescent tube
US8066541B2 (en) 2007-10-15 2011-11-29 Willy Kreutz Gmbh & Co. Kg Method for producing a contact pin for a fluorescent tube and contact pin for a fluorescent tube
CN101363091B (en) * 2008-09-08 2010-06-02 营口华润有色金属制造有限公司 High-silicon aluminum alloy and method for preparing same

Also Published As

Publication number Publication date
EP0828008A3 (en) 1998-11-11
EP0828008A2 (en) 1998-03-11
PL321947A1 (en) 1998-03-16
EP0828008B1 (en) 2000-07-05
CZ286150B6 (en) 2000-01-12
HUP9701466A3 (en) 2002-03-28
CZ262896A3 (en) 1999-05-12
DE59701965D1 (en) 2000-08-10
HUP9701466A2 (en) 1999-06-28
HU9701466D0 (en) 1997-11-28
PL183835B1 (en) 2002-07-31
ATE194393T1 (en) 2000-07-15
SI9700232A (en) 1998-04-30

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