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WO2004005563A1 - Alliage a coulee sous pression as au magnesium et procede pour produire une piece d'unite a partir d'un tel alliage a coulee sous pression as au magnesium - Google Patents

Alliage a coulee sous pression as au magnesium et procede pour produire une piece d'unite a partir d'un tel alliage a coulee sous pression as au magnesium Download PDF

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Publication number
WO2004005563A1
WO2004005563A1 PCT/EP2003/006727 EP0306727W WO2004005563A1 WO 2004005563 A1 WO2004005563 A1 WO 2004005563A1 EP 0306727 W EP0306727 W EP 0306727W WO 2004005563 A1 WO2004005563 A1 WO 2004005563A1
Authority
WO
WIPO (PCT)
Prior art keywords
die
content
casting
alloy according
alloy
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
PCT/EP2003/006727
Other languages
German (de)
English (en)
Inventor
Andreas Barth
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Priority to US10/520,358 priority Critical patent/US20050238524A1/en
Publication of WO2004005563A1 publication Critical patent/WO2004005563A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/02—Alloys based on magnesium with aluminium as the next major constituent

Definitions

  • the invention relates to an AS die casting alloy, in particular for thermally stressed unit parts in the motor vehicle sector.
  • magnesium alloys are used for thermally highly stressed unit parts, they must have a low aluminum content in order to be resistant to creep, so that the connecting screws are not loosened in hot unit operation.
  • MgAl2Sil die-casting alloys which are also referred to as AS21 alloy
  • MgAl4Sil alloys which are also referred to as AS41 alloy
  • AS21 alloys With a falling aluminum content in the magnesium alloy, less creep-prone Mg ⁇ 7 Al ⁇ 2 grain boundary precipitates form at a thermal load above 120 ° C., so that AS21 alloys are more creep-resistant than AS41 alloys.
  • an AS21 alloy is less strong, more susceptible to corrosion and, above all, difficult to cast. Casting errors, such as gluing to the mold and hot cracks, do not allow safe series production of large unit parts.
  • an AS41 alloy does not have these disadvantages. However, it is more susceptible to creep and less ductile due to the higher content of Mg ⁇ 7 Al ⁇ 2 grain size separations. A lower toughness deteriorates the dynamic strength of the alloy in the case of a notch effect, e.g. caused by stone chips, corrosion, etc. When subjected to thermal stress, the ductility drops further as a result of the precipitation of additional, brittle Mg 17 Al ⁇ 2 phases at the grain boundaries. This reduces the dynamic load capacity of components made of AS41 alloys while driving. Such alloys are known, for example, from WO-A-01 02 614.
  • the invention is therefore based on the object of providing an AS alloy which is thermally stable with regard to creep and ductility and at the same time can be cast satisfactorily.
  • the aluminum content lies between the standardized alloys AS21 and AS41.
  • the aluminum content of the AS die-cast alloy according to the invention does not reach the value that an AS41 alloy has, there is no danger that the die-cast part will become brittle.
  • the aluminum content is between 2.5% by weight and 4% by weight, in particular between 2.8% by weight and 3.5% by weight, preferably 3% by weight.
  • the castability, strength, corrosion resistance, creep resistance and ductility can be set within certain limits by the choice of the aluminum content.
  • the AS die casting alloy is a MgAl3Sil alloy (AS31).
  • AS31 MgAl3Sil alloy
  • This alloy has an aluminum content and in particular further alloy components that lie between the values of AS21 and AS41 alloys.
  • the AS die casting alloy according to the invention has an Mn content which is greater than 0/20% by weight.
  • the Cu content is ⁇ 100 ppm.
  • the Ni content is below 20 pp.
  • the Fe content is also ⁇ 50 ppm.
  • the Si content is between 0.7 and 1.5% by weight.
  • the Zn content is below 0.20% by weight.
  • the above-mentioned object is also achieved with a method for producing a thermally resilient unit part from the above-mentioned AS die-casting alloy in that it is quenched in water after the casting or after the die-casting mold has been opened.
  • the thermal stability of the structure is noticeably improved during long-term exposure at 150 ° C.
  • the roughly precipitated Mg 17 Al ⁇ 2 grain boundary precipitates act as nucleating agents for further Mg 7 Al 12 phases, so that after thermal aging the grain boundaries are completely covered or anchored with Mg i7 Al 2 phases are. This leads to total material embrittlement.
  • the water-quenched AS31 die casting according to the invention experiences only a slight loss in elongation at break after a thermal aging of 2000 hours at 150 ° C., although tensile strength and yield strength advantageously increase due to the elimination of further fine Mg 17 Al 2 phases. This results in an excellent dynamic strength behavior, even in the case of thermal stress at 150 ° C.
  • the water quenching also improves the creep resistance of the alloy according to the invention. As already mentioned, more aluminum is dissolved in the Mg matrix from the outset. This improves the creep resistance to such an extent that the dissolution behavior of aluminum screws corresponds to that of the known AS21 alloy despite the higher Al content of the alloy according to the invention.
  • the AS31 alloy according to the invention in particular a transmission housing made from it, has a minimum tensile strength of 180 MPa, a minimum yield strength of 110 MPa and the minimum elongation at break in the area of the cast gate is 6%.
  • the assembly part produced from the alloy according to the invention is preferably quenched in water within 60 s, in particular within 40 s, preferably within 30 s, after casting or after opening the die-casting mold. As mentioned above, this lowering of the temperature immediately after the casting process prevents coarse Mg ⁇ 7 Al 12 grain boundary phases from forming in excess.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

La présente invention concerne un alliage à coulée sous pression AS, notamment destiné à des pièces d'unité à contrainte thermique utilisées dans le domaine automobile, dont la teneur en Al est située entre la teneur en Al des alliages AS21 et AS41. La présente invention concerne également un procédé pour produire une pièce d'unité à partir d'un tel alliage, selon lequel la pièce est trempée dans l'eau après la coulée ou après l'ouverture du moule de coulée sous pression.
PCT/EP2003/006727 2002-07-05 2003-06-26 Alliage a coulee sous pression as au magnesium et procede pour produire une piece d'unite a partir d'un tel alliage a coulee sous pression as au magnesium Ceased WO2004005563A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/520,358 US20050238524A1 (en) 2002-07-05 2003-06-26 As-magnesium pressure die cast alloy and method for producing a subassembly part from an as-magnesium pressure die cast alloy of this type

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10230276.6 2002-07-05
DE10230276A DE10230276B4 (de) 2002-07-05 2002-07-05 AS-Druckgusslegierung und Verfahren zum Herstellen eines Aggregatteils aus einer derartigen AS-Druckgusslegierung

Publications (1)

Publication Number Publication Date
WO2004005563A1 true WO2004005563A1 (fr) 2004-01-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/006727 Ceased WO2004005563A1 (fr) 2002-07-05 2003-06-26 Alliage a coulee sous pression as au magnesium et procede pour produire une piece d'unite a partir d'un tel alliage a coulee sous pression as au magnesium

Country Status (3)

Country Link
US (1) US20050238524A1 (fr)
DE (1) DE10230276B4 (fr)
WO (1) WO2004005563A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2402758A2 (fr) 2005-09-19 2012-01-04 Veridex, LLC Procédés et matériaux pour identifier l'origine d'un carcinome d'origine primaire inconnue
US20120148193A1 (en) * 2009-01-08 2012-06-14 Afl Telecommunications Llc Ferrule structure and assembly for lens terminated fiber

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7363099B2 (en) * 2002-06-07 2008-04-22 Cadence Design Systems, Inc. Integrated circuit metrology
EP1532670A4 (fr) 2002-06-07 2007-09-12 Praesagus Inc Caracterisation et reduction de variation pour circuits integres
DE102004039748A1 (de) * 2004-08-17 2006-03-09 Daimlerchrysler Ag Druckgussbauteile aus Aluminium- und Magnesium-Legierungen mit mechanischen Verbindungen und Verfahren zum Verbinden
DE102006057660B4 (de) * 2006-12-07 2019-08-22 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Druckgießen von Bauteilen und Verwendung einer Sprühvorrichtung einer Druckgießvorrichtung
WO2013128500A1 (fr) * 2012-02-29 2013-09-06 日本精工株式会社 Procédé d'évaluation de rigidité de produit coulé sous pression et produit coulé sous pression
IL238698B (en) * 2015-05-07 2018-04-30 Dead Sea Magnesium Ltd Creep resistant, ductile magnesium alloys for die casting

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718460A (en) * 1970-06-05 1973-02-27 Dow Chemical Co Mg-Al-Si ALLOY
JPH0578775A (ja) * 1991-09-20 1993-03-30 Toyota Motor Corp 耐食性に優れたマグネシウム合金
WO2001002614A1 (fr) * 1999-07-02 2001-01-11 Norsk Hydro Asa Alliage a base de mg resistant a la corrosion et contenant al, si, mn, et re en tant que metaux
WO2003056050A1 (fr) * 2001-12-26 2003-07-10 Jsc 'avisma Titanium-Magnesium Works' Alliage a base de magnesium et procede de fabrication correspondant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959913A (en) * 1932-01-29 1934-05-22 Dow Chemical Co Magnesium base forging alloy
US2264308A (en) * 1940-03-09 1941-12-02 Dow Chemical Co Magnesium base alloy
NO121753B (fr) * 1967-12-04 1971-04-05 Dow Chemical Co
UST944006I4 (fr) * 1974-12-05 1976-03-02
EP1060817B1 (fr) * 1999-06-04 2004-09-15 Mitsui Mining and Smelting Co., Ltd Procédé de moulage sous pression d'alliages de magnésium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718460A (en) * 1970-06-05 1973-02-27 Dow Chemical Co Mg-Al-Si ALLOY
JPH0578775A (ja) * 1991-09-20 1993-03-30 Toyota Motor Corp 耐食性に優れたマグネシウム合金
WO2001002614A1 (fr) * 1999-07-02 2001-01-11 Norsk Hydro Asa Alliage a base de mg resistant a la corrosion et contenant al, si, mn, et re en tant que metaux
WO2003056050A1 (fr) * 2001-12-26 2003-07-10 Jsc 'avisma Titanium-Magnesium Works' Alliage a base de magnesium et procede de fabrication correspondant

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
AVEDESIAN M.M., BAKER H.: "Magnesium and Magnesium Alloys", 1999, ASM INTERNATIONAL, OHIO, USA, ISBN: 0-87170-657-1, XP002255095 *
DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; BLUM W ET AL: "Comparative study of creep of the die-cast Mg-alloys AZ91, AS21, AS41, AM60, and AE42", XP002255097, Database accession no. E2002076863118 *
DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; BRONFIN B ET AL: "Preparation and solidification features of as series magnesium alloys", XP002255098, Database accession no. E2003017299636 *
DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; NIKULIN L V ET AL: "STRUCTURE AND PROPERTIES OF Mg ALLOY PRESSURE DIECASTINGS", XP002255096, Database accession no. EIX76030001526 *
MAGNESIUM TECHNOLOGY 2000;NASHVILLE, TN, UNITED STATES MAR 12-16 2000, 2000, TMS Annu Meet;TMS Annual Meeting 2000, pages 253 - 259, XP002255094 *
MATER. SCI. ENG. A;MATERIALS SCIENCE AND ENGINEERING A DECEMBER 2001, vol. 319-321, December 2001 (2001-12-01), pages 735 - 740, XP002255093 *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 406 (C - 1090) 29 July 1993 (1993-07-29) *
RUSS CAST PROD OCT 1974, no. 10, October 1974 (1974-10-01), pages 443 - 445, XP009017790 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2402758A2 (fr) 2005-09-19 2012-01-04 Veridex, LLC Procédés et matériaux pour identifier l'origine d'un carcinome d'origine primaire inconnue
US20120148193A1 (en) * 2009-01-08 2012-06-14 Afl Telecommunications Llc Ferrule structure and assembly for lens terminated fiber
US8693825B2 (en) * 2009-01-08 2014-04-08 Afl Telecommunications Llc Ferrule structure and assembly for lens terminated fiber

Also Published As

Publication number Publication date
DE10230276B4 (de) 2005-05-19
US20050238524A1 (en) 2005-10-27
DE10230276A1 (de) 2004-01-22

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