EP0876514A1 - PRODUITS EPAIS EN ALLIAGE A1ZnMgCu A PROPRIETES AMELIOREES - Google Patents
PRODUITS EPAIS EN ALLIAGE A1ZnMgCu A PROPRIETES AMELIOREESInfo
- Publication number
- EP0876514A1 EP0876514A1 EP97901668A EP97901668A EP0876514A1 EP 0876514 A1 EP0876514 A1 EP 0876514A1 EP 97901668 A EP97901668 A EP 97901668A EP 97901668 A EP97901668 A EP 97901668A EP 0876514 A1 EP0876514 A1 EP 0876514A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thickness
- mpavm
- mpa
- product
- product 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.)
- Granted
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
- C22F1/053—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 zinc 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
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
Definitions
- the invention relates to aluminum alloy products of the AlZnMgCu type (series 7000 according to the designation of the Aluminum Association) with a thickness greater than 60 mm. These products can be hot-rolled plates or sheets, forged blocks or spun products. In the case where the product is not of parallelepiped shape, the term thickness is understood to mean the smallest dimension of the product at the time of quenching (for example the thickness of the thinnest wall for a profile).
- Thick products laminated, forged or spun from ahiminhim alloy of the 7000 series are used to produce, by cutting, surfacing or mass machining, high resistance parts intended for the aeronautical industry, for example wing elements such as wing spars or fishplates. as well as fuselage elements such as frames, or parts for mechanical construction such as components of machine tools or molds of plastics.
- the alloy must be able to be cast and transformed under good conditions to lead to an acceptable metallurgical quality.
- the transformation after casting of the plate or billet usually comprises a homogenization, a hot transformation by rolling, forging or spinning, dissolving, quenching (for example by immersion or spraying with a liquid hardening), possibly stress relieving by cold traction or by compression, maturation and tempering.
- the cooling during quenching can be more or less rapid.
- the quenching speed here denotes the average cooling speed (in ° C./s) of the product between 450 and 280 ° C., relative to the quarter of a thickness.
- a product is said to be sensitive to quenching if its static mechanical characteristics, such as its elastic limit, decrease when the quenching speed decreases, which, of course, is more likely to occur on thick products.
- a fiber structure is generally sought which is obtained by avoiding too great recrystallization of the alloy.
- anti-crystallization elements such as Zr, Ti, Cr, Mn, V, Hf or Se are added to the composition.
- the compositions registered with the AJuminum Association of alloys 7010 and 7050 comprise an addition of Zr at contents of between 0.10 and 0.16% respectively, and between 0.08 and 0.15%.
- the Russian metallurgists have proposed, to reduce the sensitivity to hardening, the alloy V93, or 1930 according to the Russian standard GOST 11069, which does not contain anti-recrystallizing elements, but has a composition very far from those of alloys 7010 or 7050 , with in particular a high iron content (between 0.20 and 0.45%) unfavorable to toughness and resistance to fatigue.
- the object of the invention is to find, for alloys 7000 with copper with the addition of zirconium, a particular composition range for thick products which makes them very insensitive to quenching, in which recrystallization is controlled to a very low level. retaining a commercial purity of iron and siUcium, which leads to high mechanical strength and toughness, as well as to good behavior in fatigue, without detrimental effect on the resistance to corrosion under stress.
- the subject of the invention is also an alloy product with a more restricted composition: 5.9 ⁇ Zn ⁇ 8.7
- the inventors determined a range of composition of alloys 7000, containing copper and zirconium, with commercial contents of iron and silicon, making it possible to control the recrystallization, and leading, from a thickness of approximately 60 mm, to a reduction in the sensitivity to quenching of the product when the thickness of the product increases, while maintaining good toughness and good resistance to corrosion under stress, with a range of conventional industrial transformation.
- the magnesium content of the alloy is reduced compared to that of alloys 7010 or 7050, since it is centered around 2% instead of 2.3%, but it cannot be lower than 1.7% if we want to keep sufficient mechanical characteristics.
- the range of production of the product according to the invention is similar to that of products made of alloys 7000, for example in 7010 and 7050. It comprises the casting of a plate or a rod, homogenization at a temperature between 450 and 485 ° C, a hot transformation in one or more stages by rolling, spinning or forging at a temperature between 370 and 460 ° C and controlled to obtain the desired recrystallization rate, quenching by immersion or by spraying, with cold water or at a temperature below 95 ° C., stress relieving by deformation at room temperature (controlled traction or compression) at a rate of less than 5%, and possibly a tempering treatment, to obtain, for example, T6 states, T74, T76, T751, T7451 or T7651, especially in the case of the use of these products for plastics molds.
- the sheets were then subjected to a two-bearing type tempering: 6 h at 120 ° C and 17 h at 165 ° C for sheets in aUiage 7050, 6 h at 115 ° C and 10 h at 172 ° C for sheets in auUiage F.
- the cast plates were homogenized around 470 ° C and laminated in 3 passes to the thickness 6 inches (152 mm), 7.5 inches (190 mm) or 8 inches (203 mm) depending on the cases indicated in Table 3.
- the rolling exit temperatures are also shown in Table 3.
- the sheets were dissolved in 480 ° C, quenched by immersion in cold water and subjected to controlled traction with a deformation rate of 2%.
- the sheets were then subjected to a two-bearing type tempering: 6 hours at 15 ° C and 10 hours at 172 ° C for sheets in alloy G (according to the invention), 6 hours at 120 ° C and 17 hours at 165 ° C for sheets in aUiage 7050 (prior art).
- recrystallization is critical in order to obtain a compromise between toughness and acceptable elastic limit. More particularly, the value of the recrystallization rate should not exceed approximately 35% between quarter thickness and half thickness to ensure that the value of KI C (LT) measured at quarter thickness is always greater than the reference value 74 - 0.08e - 0.07
Landscapes
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Steel (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9601103A FR2744136B1 (fr) | 1996-01-25 | 1996-01-25 | Produits epais en alliage alznmgcu a proprietes ameliorees |
FR9601103 | 1996-01-25 | ||
PCT/FR1997/000144 WO1997027343A1 (fr) | 1996-01-25 | 1997-01-24 | PRODUITS EPAIS EN ALLIAGE A1ZnMgCu A PROPRIETES AMELIOREES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0876514A1 true EP0876514A1 (fr) | 1998-11-11 |
EP0876514B1 EP0876514B1 (fr) | 1999-07-14 |
Family
ID=9488644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97901668A Revoked EP0876514B1 (fr) | 1996-01-25 | 1997-01-24 | PRODUITS EPAIS EN ALLIAGE A1ZnMgCu A PROPRIETES AMELIOREES |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0876514B1 (fr) |
JP (1) | JP4235260B2 (fr) |
CA (1) | CA2244148C (fr) |
DE (2) | DE876514T1 (fr) |
FR (1) | FR2744136B1 (fr) |
WO (1) | WO1997027343A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7452429B2 (en) | 2003-06-24 | 2008-11-18 | Pechiney Rhenalu | Products made of Al-Zn-Mg-Cu alloys with an improved compromise between static mechanical characteristics and damage tolerance |
US10472707B2 (en) | 2003-04-10 | 2019-11-12 | Aleris Rolled Products Germany Gmbh | Al—Zn—Mg—Cu alloy with improved damage tolerance-strength combination properties |
CN111172436A (zh) * | 2020-01-07 | 2020-05-19 | 西南交通大学 | 一种超高强铝合金等温模锻件及其制备方法 |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2165995C1 (ru) * | 1999-10-05 | 2001-04-27 | Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" | Высокопрочный сплав на основе алюминия и изделие, выполненное из этого сплава |
CN1489637A (zh) | 2000-12-21 | 2004-04-14 | �Ƹ��� | 铝合金产品及人工时效方法 |
DE10163039C1 (de) * | 2001-12-21 | 2003-07-24 | Daimler Chrysler Ag | Warm- und kaltumformbares Bauteil aus einer Aluminiumlegierung und Verfahren zu seiner Herstellung |
FR2838136B1 (fr) * | 2002-04-05 | 2005-01-28 | Pechiney Rhenalu | PRODUITS EN ALLIAGE A1-Zn-Mg-Cu A COMPROMIS CARACTERISTIQUES STATISTIQUES/TOLERANCE AUX DOMMAGES AMELIORE |
US20050183802A1 (en) | 2002-12-06 | 2005-08-25 | Pechiney Rhenalu | Edge-on stress-relief of aluminum plates |
FR2848480B1 (fr) | 2002-12-17 | 2005-01-21 | Pechiney Rhenalu | Procede de fabrication d'elements structuraux par usinage de toles epaisses |
JP2006510808A (ja) * | 2002-12-17 | 2006-03-30 | ペシネイ レナリュ | 厚板の加工による構造要素の製造方法 |
ES2383528T3 (es) | 2003-12-16 | 2012-06-21 | Constellium France | Plancha gruesa de aleación Al-Zn-Cu-Mg recristalizada con bado contenido de Zr |
US7883591B2 (en) | 2004-10-05 | 2011-02-08 | Aleris Aluminum Koblenz Gmbh | High-strength, high toughness Al-Zn alloy product and method for producing such product |
ES2292075T5 (es) | 2005-01-19 | 2010-12-17 | Otto Fuchs Kg | Aleacion de aluminio no sensible al enfriamiento brusco, asi como procedimiento para fabricar un producto semiacabado a partir de esta aleacion. |
JP5149629B2 (ja) * | 2005-02-10 | 2013-02-20 | コンステリウム ロールド プロダクツ−レイヴンズウッド,エルエルシー | アルミニウムを主成分とするAl‐Zn‐Cu‐Mg合金及びその製造方法と使用方法 |
WO2008005852A2 (fr) * | 2006-06-30 | 2008-01-10 | Alcan Rolled Products-Ravenswood, Llc, | Alliage d'aluminium à haute résistance pouvant être traité thermiquement |
FR2907466B1 (fr) | 2006-07-07 | 2011-06-10 | Aleris Aluminum Koblenz Gmbh | Produits en alliage d'aluminium de la serie aa7000 et leur procede de fabrication |
FR2907796B1 (fr) | 2006-07-07 | 2011-06-10 | Aleris Aluminum Koblenz Gmbh | Produits en alliage d'aluminium de la serie aa7000 et leur procede de fabrication |
AT504089B1 (de) * | 2006-09-04 | 2008-08-15 | Aluminium Lend Gmbh & Co Kg | Aluminiumlegierung und verfahren zu deren herstellung |
FR3068370B1 (fr) * | 2017-07-03 | 2019-08-02 | Constellium Issoire | Alliages al- zn-cu-mg et procede de fabrication |
FR3071513B1 (fr) * | 2017-09-26 | 2022-02-11 | Constellium Issoire | Alliages al-zn-cu-mg a haute resistance et procede de fabrication |
WO2021029925A1 (fr) | 2019-06-03 | 2021-02-18 | Novelis Inc. | Produits en alliage d'aluminium à ultra-haute résistance et leurs procédés de fabrication |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3881966A (en) * | 1971-03-04 | 1975-05-06 | Aluminum Co Of America | Method for making aluminum alloy product |
US4305763A (en) * | 1978-09-29 | 1981-12-15 | The Boeing Company | Method of producing an aluminum alloy product |
CA1340618C (fr) * | 1989-01-13 | 1999-06-29 | James T. Staley | Alliage d'aluminium possedant des proprietes combinees ameliorees de resistance, de durete, et anticorrosion |
US5277719A (en) * | 1991-04-18 | 1994-01-11 | Aluminum Company Of America | Aluminum alloy thick plate product and method |
US5312498A (en) * | 1992-08-13 | 1994-05-17 | Reynolds Metals Company | Method of producing an aluminum-zinc-magnesium-copper alloy having improved exfoliation resistance and fracture toughness |
-
1996
- 1996-01-25 FR FR9601103A patent/FR2744136B1/fr not_active Expired - Lifetime
-
1997
- 1997-01-24 WO PCT/FR1997/000144 patent/WO1997027343A1/fr not_active Application Discontinuation
- 1997-01-24 DE DE0876514T patent/DE876514T1/de active Pending
- 1997-01-24 DE DE69700330T patent/DE69700330T2/de not_active Revoked
- 1997-01-24 JP JP52661497A patent/JP4235260B2/ja not_active Expired - Lifetime
- 1997-01-24 EP EP97901668A patent/EP0876514B1/fr not_active Revoked
- 1997-01-24 CA CA002244148A patent/CA2244148C/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9727343A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10472707B2 (en) | 2003-04-10 | 2019-11-12 | Aleris Rolled Products Germany Gmbh | Al—Zn—Mg—Cu alloy with improved damage tolerance-strength combination properties |
US7452429B2 (en) | 2003-06-24 | 2008-11-18 | Pechiney Rhenalu | Products made of Al-Zn-Mg-Cu alloys with an improved compromise between static mechanical characteristics and damage tolerance |
CN111172436A (zh) * | 2020-01-07 | 2020-05-19 | 西南交通大学 | 一种超高强铝合金等温模锻件及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
CA2244148A1 (fr) | 1997-07-31 |
FR2744136A1 (fr) | 1997-08-01 |
CA2244148C (fr) | 2005-01-04 |
DE69700330T2 (de) | 2000-01-13 |
WO1997027343A1 (fr) | 1997-07-31 |
JP2000504068A (ja) | 2000-04-04 |
EP0876514B1 (fr) | 1999-07-14 |
DE876514T1 (de) | 1999-05-06 |
DE69700330D1 (de) | 1999-08-19 |
FR2744136B1 (fr) | 1998-03-06 |
JP4235260B2 (ja) | 2009-03-11 |
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