EP1195449A2 - Durcissement par précipitation d'un alliage d'aluminium - Google Patents

Durcissement par précipitation d'un alliage d'aluminium Download PDF

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Publication number
EP1195449A2
EP1195449A2 EP01890265A EP01890265A EP1195449A2 EP 1195449 A2 EP1195449 A2 EP 1195449A2 EP 01890265 A EP01890265 A EP 01890265A EP 01890265 A EP01890265 A EP 01890265A EP 1195449 A2 EP1195449 A2 EP 1195449A2
Authority
EP
European Patent Office
Prior art keywords
temperature
minutes
hours
period
germ
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
EP01890265A
Other languages
German (de)
English (en)
Other versions
EP1195449A3 (fr
EP1195449B3 (fr
EP1195449B1 (fr
Inventor
Peter J. Prof.Dr. Uggowitzer
Simon Dipl.Ing. Kleiner
Helmut Dr. Kaufmann
Peter Dipl.Phys. Schulz
Franz Dipl.Ing.Dr.Techn. Kutner
Christoph Dr.Ing. Henkel
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.)
Aluminium Ranshofen Walzwerk GmbH
Amag Rolling GmbH
Original Assignee
Aluminium Ranshofen Walzwerk GmbH
Amag Rolling 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
Application filed by Aluminium Ranshofen Walzwerk GmbH, Amag Rolling GmbH filed Critical Aluminium Ranshofen Walzwerk GmbH
Publication of EP1195449A2 publication Critical patent/EP1195449A2/fr
Publication of EP1195449A3 publication Critical patent/EP1195449A3/fr
Application granted granted Critical
Publication of EP1195449B1 publication Critical patent/EP1195449B1/fr
Publication of EP1195449B3 publication Critical patent/EP1195449B3/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the invention comprises a starting material for components and molded parts from one Aluminum alloy with the above chemical composition, which according to a solution annealing is thermally pretreated.
  • a hardenability of an Al-Mg-Si alloy is due to the fact that the Solubility of magnesium and silicon in the aluminum matrix with increasing Temperature increases. After a solution heat treatment and an intensified one Cooling of parts from the aforementioned alloy therefore lie in them supersaturated mixed crystals, which tend to excretions to form a thermal equilibrium to reach. This can be done by aging Elimination morphology in the material causes high values for the hardness, the yield strength, the tensile strength and the elongation of the Material.
  • this pretreatment a temperature difference between the sheet layers in the center and in the Given surface area of the coil.
  • a two-stage pretreatment of a sheet is to be carried out provide high mechanical values after hot aging (PBR).
  • PBR hot aging
  • At the rapid cooling from the solution annealing temperature intercepts at a temperature less than 177 ° C, a hold for more than 30 seconds and a cooling to room temperature, at which the sheet with a period of time stored for less than 24 hours.
  • the second step of the Pretreatment sees heating to 66 ° C to 182 ° C with a holding time from 2 minutes to 24 hours before.
  • a method has become known from WO 96/07768, in which according to a solution heat treatment a sheet of at least one other Is subjected to heat treatment. This takes place quickly Heating and the like cooling on or from one Peak temperature between 100 ° C and 300 ° C. Appears necessary the shortest possible holding time at peak temperatures of less than 1 minute.
  • the heat treatment curve with increasing maximum values thus indicates Sawtooth profile.
  • the invention seeks to remedy this and aims to create a method to create of the type mentioned, by means of which by a Pretreatment causes such a germ state in the material on the one hand enables a long availability period of the raw material and on the other hand with a subsequent hot aging with a Technology that can be used for paint baking improved provides mechanical material values.
  • Step 2 or at least one in the pre-treatment step Triple heat treatment of the primary material with the proviso that the last or final hot aging within the Pretreatment step at a reduced temperature for stabilization carried out the seed structure and the primary material, optionally after a longer preparation time, deformed and in the 3rd step the molded part at one Temperature between 165 ° C and 190 ° C for a period of 12 to Stored for 38 minutes and age-hardened.
  • Pretreatment step formed a finely dispersed seed structure and this is stabilized. Due to the short diffusion paths and the Hot aging germs that no longer dissolve quickly The material has cured. It also causes a stabilized Germ structure that in the course of long-term storage at room temperature a provision of the material is only slightly noticeable Cold curing occurs.
  • Particularly favorable mechanical characteristics of the precipitation hardened Material can be reached if in the 2nd step or in the pre-treatment step the input material within 10 minutes, preferably within 6 Minutes after solution heat treatment to form a superstructure to a temperature below 100 ° C, but above room temperature warmed and held at this temperature for 3 to 28 minutes and subsequently for nucleation to a temperature between 120 ° C brought and 220 ° C and held for 3 to 28 minutes and then is cooled, after which a stabilization of the germ structure in the material by warm storage between 75 ° C and 145 ° C for a period of 0.6 to 24 hours.
  • the material values that can ultimately be achieved be when the primary material is at a temperature to form the superstructure heated between 100 ° C and 45 ° C, preferably between 90 ° C and 55 ° C and at this temperature 3 to 10 minutes, preferably 3 to 6 minutes, is held. This creates a multitude of well distributed ones Germination centers with a small distance between them.
  • a seed structure that which has a superstructure Material to a temperature of 160 ° C to 200 ° C, preferably from 175 ° C to 195 ° C, brought and 3 to 10 minutes, preferably 3 up to 6 minutes, held and then cooled, can be small effective germs in a matrix depleted of foreign atoms be formed advantageously.
  • An aluminum-based alloy with favorable mechanical properties can be created if after the stabilization of the germ structure in the Material deformed the primary material within 420 hours and the Molding is cured. It is preferred if after the stabilization of the Germ structure in the material the primary material within 1000 hours deformed and the molded part is cured.
  • the further object of the invention to provide a starting material which has a stable germ structure with favorable mechanical characteristics for processing for a long period of preparation and which can be fully hardened in a PBR treatment is achieved in that the material consists of heating at least three times Pretreatment, in which the last heat treatment step for stabilizing the germ structure takes place at a reduced temperature, at least for 420 hours, preferably for at least 1000 hours, a stabilized germ structure with the mechanical characteristic values hardness HB ⁇ 65 (2.5 / 62.5 / 16) yield strength R p0.2 ⁇ 140 MPa, preferably ⁇ 130 tensile strenght R m ⁇ 270 MPa, preferably ⁇ 240 uniform elongation Ag ⁇ 18% and, if necessary, after a molding of the part, it is precipitation-hardenable at a temperature between 165 ° C. and 190 ° C. within a period of 12 to 38 minutes.
  • the advantages of the primary material according to the invention are in particular that larger storage quantities for production with naturally longer ones Waiting times can be accepted because cold curing or aging at room temperature is largely suppressed. Even after longer provision times is the one with a stable germ structure Material fully curable under PBR conditions, indicating a lack of GP-I zones indicates.
  • the stabilized pre-structure was fine, homogeneously distributed, narrow neighboring germs in a surrounding zone depleted of Si and Mg and thereby one during the eventual following Elimination treatment the mechanical properties favorable ensures influencing excretion structure.
  • the depleted Zone around the individual germs are due to the fine and uniform Distribution of the same the diffusion paths for those forming the excretions Elements short, so that even short curing times are fully effective.
  • the precipitation-hardened component or molded part produced therefrom has the following mechanical characteristics: hardness HB ⁇ 80 yield strength R po, 2 ⁇ 190 MPa. preferably ⁇ 210 tensile strenght R m ⁇ 240 MPa, preferably ⁇ 260 uniform elongation Ag ⁇ 12%
  • the yield point R p0.2 was reduced by less than 10% and the elongation values were at least constant, preferably increased.
  • Sheet samples from an Al-Si-Mg alloy were solution annealed at 540 ° C for 2 minutes and then cooled in water to room temperature. A portion of the sheet metal samples was stored at 5 ° C. above room temperature for 10 minutes, then kept at 185 ° C. for 5 minutes and quenched in water. The treatment of a second part of the samples was carried out by holding the solution-annealed and cooled samples at 60 ° C. for 5 minutes and then storing them at 185 ° C. for 5 minutes and then cooling them down with water.
  • the method according to the invention can be used for cold curing an aluminum base alloy reduces or prevents one Seed structure are formed and stabilized in such a way that after storage of the primary material of 1000 hours at room temperature a subsequent PBR treatment or short-term aging hardened can be.
  • the extent of laydowns, currently only the first Results up to 1500 hours are obviously not available significant influence on the mechanical material values after the PBR curing, which tends to be the strength and elongation as well Buckling behavior appear to be improved

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Articles (AREA)
  • Soft Magnetic Materials (AREA)
  • Chemically Coating (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Exhaust Silencers (AREA)
  • Laminated Bodies (AREA)
EP01890265.0A 2000-09-14 2001-09-13 Durcissement par précipitation d'un alliage d'aluminium Expired - Lifetime EP1195449B3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0156300A AT408763B (de) 2000-09-14 2000-09-14 Ausscheidungshärten einer aluminiumlegierung
AT15632000 2000-09-14

Publications (4)

Publication Number Publication Date
EP1195449A2 true EP1195449A2 (fr) 2002-04-10
EP1195449A3 EP1195449A3 (fr) 2003-12-17
EP1195449B1 EP1195449B1 (fr) 2006-12-13
EP1195449B3 EP1195449B3 (fr) 2021-03-17

Family

ID=3688357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01890265.0A Expired - Lifetime EP1195449B3 (fr) 2000-09-14 2001-09-13 Durcissement par précipitation d'un alliage d'aluminium

Country Status (3)

Country Link
EP (1) EP1195449B3 (fr)
AT (2) AT408763B (fr)
DE (2) DE20101474U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8728258B2 (en) 2008-06-10 2014-05-20 GM Global Technology Operations LLC Sequential aging of aluminum silicon casting alloys
EP2789707A1 (fr) * 2013-04-08 2014-10-15 Benteler Automobiltechnik GmbH Procédé de fabrication d'un composant de châssis de véhicule automobile
US10513766B2 (en) 2015-12-18 2019-12-24 Novelis Inc. High strength 6XXX aluminum alloys and methods of making the same
US10538834B2 (en) 2015-12-18 2020-01-21 Novelis Inc. High-strength 6XXX aluminum alloys and methods of making the same
US11932928B2 (en) 2018-05-15 2024-03-19 Novelis Inc. High strength 6xxx and 7xxx aluminum alloys and methods of making the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012008245B4 (de) * 2012-04-25 2020-07-02 Audi Ag Verfahren zum Aushärten eines Bauteils

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135633A (en) * 1959-09-08 1964-06-02 Duralumin Heat treatment process improving the mechanical properties of aluminiummagnesium-silicon alloys
EP0480402A1 (fr) * 1990-10-09 1992-04-15 Sumitomo Light Metal Industries Limited Procédé de fabrication de matériau en alliage d'aluminium présentant une aptitude excellente au formage et durcissable lors de la cuisson du vernis
WO1996007768A1 (fr) * 1994-09-06 1996-03-14 Alcan International Limited Procede de traitement thermique destine a une feuille d'alliage d'aluminium
EP0801141A1 (fr) * 1996-04-15 1997-10-15 Hoogovens Aluminium N.V. Procédé de fabrication d'une feuille en alliage d'aluminium
US5718780A (en) * 1995-12-18 1998-02-17 Reynolds Metals Company Process and apparatus to enhance the paintbake response and aging stability of aluminum sheet materials and product therefrom

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135633A (en) * 1959-09-08 1964-06-02 Duralumin Heat treatment process improving the mechanical properties of aluminiummagnesium-silicon alloys
EP0480402A1 (fr) * 1990-10-09 1992-04-15 Sumitomo Light Metal Industries Limited Procédé de fabrication de matériau en alliage d'aluminium présentant une aptitude excellente au formage et durcissable lors de la cuisson du vernis
US5728241A (en) * 1993-07-28 1998-03-17 Alcan International Limited Heat treatment process for aluminum alloy sheet
WO1996007768A1 (fr) * 1994-09-06 1996-03-14 Alcan International Limited Procede de traitement thermique destine a une feuille d'alliage d'aluminium
US5718780A (en) * 1995-12-18 1998-02-17 Reynolds Metals Company Process and apparatus to enhance the paintbake response and aging stability of aluminum sheet materials and product therefrom
EP0801141A1 (fr) * 1996-04-15 1997-10-15 Hoogovens Aluminium N.V. Procédé de fabrication d'une feuille en alliage d'aluminium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J.R.DAVIS: "Metals Handbook - Desk Edition" 1998 , ASM INTERNATIONAL , MATERIALS PARK OHIO XP002255218 * Seite 429 - Seite 430 * *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8728258B2 (en) 2008-06-10 2014-05-20 GM Global Technology Operations LLC Sequential aging of aluminum silicon casting alloys
EP2789707A1 (fr) * 2013-04-08 2014-10-15 Benteler Automobiltechnik GmbH Procédé de fabrication d'un composant de châssis de véhicule automobile
US10513766B2 (en) 2015-12-18 2019-12-24 Novelis Inc. High strength 6XXX aluminum alloys and methods of making the same
US10538834B2 (en) 2015-12-18 2020-01-21 Novelis Inc. High-strength 6XXX aluminum alloys and methods of making the same
US11920229B2 (en) 2015-12-18 2024-03-05 Novelis Inc. High strength 6XXX aluminum alloys and methods of making the same
US12043887B2 (en) 2015-12-18 2024-07-23 Novelis Inc. High strength 6xxx aluminum alloys and methods of making the same
US11932928B2 (en) 2018-05-15 2024-03-19 Novelis Inc. High strength 6xxx and 7xxx aluminum alloys and methods of making the same

Also Published As

Publication number Publication date
ATE348202T1 (de) 2007-01-15
EP1195449A3 (fr) 2003-12-17
DE20101474U1 (de) 2001-06-28
ATA15632000A (de) 2001-07-15
AT408763B (de) 2002-03-25
DE50111626D1 (de) 2007-01-25
EP1195449B3 (fr) 2021-03-17
EP1195449B1 (fr) 2006-12-13

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