WO2012080592A1 - Produits epais en alliage 7xxx et procede de fabrication - Google Patents
Produits epais en alliage 7xxx et procede de fabrication Download PDFInfo
- Publication number
- WO2012080592A1 WO2012080592A1 PCT/FR2011/000637 FR2011000637W WO2012080592A1 WO 2012080592 A1 WO2012080592 A1 WO 2012080592A1 FR 2011000637 W FR2011000637 W FR 2011000637W WO 2012080592 A1 WO2012080592 A1 WO 2012080592A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- block
- thick
- alloy
- weight
- hours
- 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
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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
- 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
-
- 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 present invention generally relates to aluminum alloy products and, more particularly, to such thick 7xxx alloy products, their methods of manufacture and use.
- Thick aluminum blocks are also useful in the field of mechanical engineering.
- notch resistance is an important property of use for these products and it can be characterized for example by the NSR, which is the ratio between the elastic limit and the mechanical strength in the presence of a notch (" Sharp-Notch Strength-to-Yield Strength Ratio ") measured according to ASTM-E602.
- NSR the ratio between the elastic limit and the mechanical strength in the presence of a notch
- a product is said to be quench sensitive if its static mechanical characteristics, such as its yield strength, decrease as the quenching rate decreases.
- the quenching rate is the average cooling rate of the product during quenching.
- the thick blocks should also preferably have low residual stresses. Indeed, the residual stresses cause deformations during the machining which affect the geometry of the mold.
- the residual stresses can be measured for example by the method described in the patent application WO 2004/053180.
- low residual stresses is typically meant a value of less than 4 kJ / m 3 , and generally of the order of. 2 kJ / nr
- the thick blocks must be obtained with a process as fast and economical as possible.
- EPI 587965 discloses an alloy useful for the manufacture of thick blocks of composition (in% by weight) 4.6-5.2% Zn; 2.6-3.0% Mg; 0.1 * 0.2% Cu; 0.05-0.2% Zr; not more than 0.05% Mn; not more than 0.05% Cr; not more than 0.15% Fe; not more than 0.15% Si; not more than 0.10% Ti and a method of manufacturing these blocks, in which the ingot obtained by continuous casting is used directly as a block.
- the alloy 7003 which has the following composition:
- the alloy 7021 which has the following composition:
- Patent Application FR 2,341,661 describes an alloy of composition (in% by weight) 4.0-6.2 Zn, 0.8-3.0% Mg, 0-1.5% Cu, 0 , 05 - 0.30% Zr, 0 - 0.20% Fe, 0-0.15% Si, 0-0.25% Mn, 0-0.10% Ti intended to be forged or kneaded by hot deformation and to be used for the construction of vehicles, machines, apparatus tanks and tooling.
- Patent Application JP81144031 (Furukawa) describes an alloy of composition (in% by weight) 4.0-6.5% Zn, 0.4-1.8% Mg, 0.1-0.5% Cu, 0.1-0.5% Zr, and additionally 0.05-0.20 % Mn and / or 0.05-0.20% Cr, for the production of tubes.
- the problem solved by the present invention is to obtain thick aluminum blocks having an improved property compromise between the static mechanical characteristics and the notch resistance, having a low level of residual stresses, by a rapid process. and economic.
- a first object of the invention is an aluminum alloy for the manufacture of thick blocks comprising (in% by weight);
- a second subject of the invention is a method comprising the steps of: (a) casting a thick alloy block according to the invention,
- Yet another object of the invention is a thick block of aluminum obtainable by the process according to the invention, characterized in that, at 1 ⁇ 4 thickness in the direction TL, the elastic limit Rp 0i2 and the ratio called NSR between the notched specimen mechanical strength and the elastic limit R P0 , 2 measured according to ASTM E602-03, paragraph 9.2 are such that:
- R p o, 2 > 320 MPa, preferably 330 MPa
- Yet another object of the invention is the use of a thick block according to the invention for the manufacture of mold for injection of plastics.
- Figure 1 Compromise obtained between the yield strength Rp 0 , 2 and the parameter called NSR ("Sharp-Notch Strength-to-Yield Strength Ratio"), which is the ratio between the mechanical strength on notched specimen and the limit of Rpo elasticity, 2 .
- NSR Sharp-Notch Strength-to-Yield Strength Ratio
- the static mechanical characteristics in other words the ultimate ultimate tensile strength R m , the tensile yield strength R p o , 2 and the elongation at break A, are determined by a tensile test. traction according to EN 10002-1 or NF EN ISO 6892-1, the location at which the parts are taken and their meaning as defined by EN 485-1.
- the notched specimen mechanical strength is obtained in accordance with ASTM E602-03.
- the so-called NSR ratio between notched specimen strength and yield strength R P0.2 (“Sharp-Notch Strength-to-Yield Strength Ratio" is calculated. This ratio gives an indication of the notch resistance of the sample.
- the combination of the zinc content of 5.3 to 5.9% by weight, the magnesium content of 0.8 to 1.8% and the copper content of less than 0.2% by weight makes it possible to achieve an improved compromise between mechanical strength and notch resistance.
- the preferred content of Zn is 5.4 to 5.8% by weight.
- the preferred magnesium content is 1.0 to 1.4% by weight or even 1.1 to 1.3% by weight.
- the preferred copper content is less than 0.05% by weight or even less than 0.04% by weight.
- the zirconium content is from 0.05 to 0.12% by weight. Preferably, the zirconium content is at most 0.10% by weight or even 0.08% by weight, so as to further reduce the quenching sensitivity of the thick aluminum blocks.
- the titanium content is less than 0.15% by weight.
- an amount of titanium of between 0.01 and 0.05% by weight and preferably between 0.02 and 0.04% by weight is added in order to refine the grain size during casting.
- the Cr content and the Mn content are less than 0.1%.
- the Cr content is less than 0.05% by weight or even less than 0.03% by weight, and / or the Mn content is less than 0.05% by weight or even less than 0, 03% by weight, which in particular makes it possible to further reduce the quenching sensitivity of the thick aluminum blocks.
- Si and Fe are unavoidable impurities whose content is to be minimized so as in particular to improve the mechanical strength on the notched specimen.
- the Fe content is less than 0.20% by weight and preferably less than 0.15% by weight.
- the Si content is less than 0.15% by weight and preferably less than 0.10% by weight.
- a suitable method for making thick alloy blocks according to the invention comprises the steps of
- the casting of the thick block is preferably carried out by semi-continuous casting with direct cooling ("Direct chili casting").
- the thick block has a thickness greater than 350 mm, and preferably greater than 450 mm or even greater than 550 mm.
- the block is substantially parallelepipedal shape, it has a greater dimension in general (length), a 'second largest dimension (width) and a smallest dimension (thickness).
- the block may optionally then be homogenized, typically by a heat treatment at a temperature between 450 and 550 ° C for a period of 10 minutes to 30 hours and / or undergo a flash treatment at a temperature between 300 and 400 ° C for a period of 10 minutes to 30 hours followed by cooling to a temperature below 100 ° C.
- the block is then put into solution, that is to say heat-treated so that the block temperature reaches 500 to 560 ° C for a period of between 10 minutes and 5 hours, or even 20 hours.
- This heat treatment can be carried out at a constant temperature or in several stages.
- the block After dissolution, the block is cooled to a temperature below 100 ° C, preferably to room temperature. Cooling can be carried out in still air, ventilated air, sprinkling a mist, spraying or immersion in water.
- the cooling rate is at least 200 ° C./h.
- the cooling rate is less than 200 ° C./h.
- the residual stresses are low but the mechanical properties do not reach their maximum values because of a certain sensitivity to the quenching of the alloy.
- Such a cooling rate can be achieved in still air or with a fan.
- the cooling rate is at least 800 ° C./h.
- a cooling rate can be obtained by spraying or immersion in water. Since a cooling rate that is too high can generate excessive residual stresses in the blocks, water is preferably used at a temperature of at least 50.degree. C. and preferably at least 70.degree. C. for cooling.
- the block thus hardened is stripped, preferably by cold compression with a permanent deformation rate of between 1% and 5% and preferably between 2 and 4%. The stress relieving allows to reduce the residual stresses in the metal and to avoid the deformations during the machining.
- the cooling rate is between 200 ° C / h and 400 ° C / h.
- the cooling rate is between 200 ° C. and 400 ° C./h, satisfactory mechanical characteristics and a low residual energy can be obtained simultaneously, making it possible to avoid carrying out a stress relieving step. compression.
- Such a cooling rate can be obtained by means of mist spray.
- the income is made so that the block reaches a temperature of 120 and 170 ° C and preferably between 130 and 160 ° C for a period of 4 to 48 hours and preferably between 8 and 24 hours.
- an income is achieved to reach the T6 or T652 state, corresponding to the peak of the static mechanical properties (Rm and Rp0,2).
- said block does not undergo between the casting and the significant deformation step income by wrought.
- wrought is typically meant rolling operations or hot forging.
- significant deformation is meant that none of the dimensions of the cast block - which is a thick block of substantially parallelepiped shape (length L, width TL, thickness TC) - undergoes significant modification, that is to say typically at least about 10%, by heat treatment between casting and income.
- the thick blocks obtained by the process according to the invention have a compromise of advantageous properties, in particular between the elastic limit and the notch resistance, which are two antagonistic properties (the more important one is, the more other, is weak). More specifically, the Applicant has found that for a thick block of an alloy having the composition according to the invention and having been obtained by following the claimed process steps until the income (casting, homogenization and stress relief optional, dissolution and quenching without significant wrought between the casting and the final step of income), regardless of the income treatment (mono- or multi-level) subsequently carried out to reach a given elastic limit Rp0.2, the NSR (“Sharp-Notch Strength-to-Yield Strength Ratio") parameter used to characterize the notch resistance of the block thus obtained, reaches a value that does not depend on the income treatment performed to obtain the targeted Rp02. For such thick blocks, a relationship between the RpO 2 and the NSR measured for example at 1 ⁇ 4 of the thickness can therefore be established, and this relationship appears to be substantially linear.
- the Applicant has been able to establish that, when the method according to the first embodiment is used, the notch resistance, as evaluated at 1 ⁇ 4 thickness in the TL direction by the NSR (ratio measured according to ASTM E602 -03, paragraph 9.2) is greater than:
- the NSR is at least 0.7, preferably 0.8, and the yield strength is at least 320 MPa, preferably 330 MPa.
- the notch resistance as evaluated at 1 ⁇ 4 thickness in the TL direction by the NSR (measured according to ASTM ⁇ 602 03, paragraph 9.2) is greater than:
- the NSR is at least 0.8, preferably 1.0, and the yield strength is at least 320 MPa and preferably 330 MPa.
- Alloys A, B, C and D were cast as blocks of thickness 625 mm.
- the blocks of alloys A and C were transformed as follows: the blocks were first homogenized at 480 ° C. The blocks were then dissolved for 4 hours at 540 ° C. and air-cooled at approximately 40 ° C./h (from 540 ° C. to 410 ° C. in 2 hours and then from 410 ° C. to 90 ° C. in 9 hours). ). The blocks were then first treated at 105 ° C for about 12 hours and then at 160 ° C for about 16 hours.
- the alloy blocks B and D were transformed as follows: the blocks first underwent a 2 hour expansion at 350 ° C. After being dissolved for 4 hours at 540 ° C. (Block B) or 10 hours at 475 ° C. (Block D), the blocks were cooled with water at 80 ° C. by immersion. The blocks then underwent compression straightening of 3%. The alloy blocks B were then tempered at 130 ° C for 24 h (Block B 1) or 150 ° C for 16 h (Block B2). The alloy block D was first treated at 90 ° C for 8 to 12 hours and then at 160 ° C for 14 to 16 hours.
- Figure 1 shows the compromise obtained between the yield strength Rpo , 2 and the report called “Sharp-Notch Strength-to-Yield Strength Ratio", known by the abbreviation "NSR" and commonly used to characterize the sensitivity to notch effect of a material.
- NSR Sharp-Notch Strength-to-Yield Strength Ratio
- this parameter is the ratio between the mechanical strength measured on notched specimen and the elastic limit measured on non-notched specimen.
- ASTM E602-03 particularly in section 9.2.
- the alloy A according to the invention allows, with respect to the alloy C, a simultaneous improvement of the yield strength and of the NSR ratio, and thus of the notch strength.
- the NSR report obtained is greater than
- the alloy block B according to the invention has an NSR ratio greater than -0.017 * R p o, 2 + 6.7.
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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)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heat Treatment Of Steel (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013543846A JP6118728B2 (ja) | 2010-12-14 | 2011-12-06 | 7xxx系合金製の厚い製品および製造方法 |
| EP11808242.9A EP2652163B1 (fr) | 2010-12-14 | 2011-12-06 | Produits epais en alliage 7xxx et procede de fabrication |
| CA2820768A CA2820768A1 (fr) | 2010-12-14 | 2011-12-06 | Produits epais en alliage 7xxx et procede de fabrication |
| PL11808242T PL2652163T3 (pl) | 2010-12-14 | 2011-12-06 | Grube produkty ze stopu 7xxx i sposób wytwarzania |
| MX2013006848A MX354911B (es) | 2010-12-14 | 2011-12-06 | Productos gruesos de aleacion 7xxx y proceso de fabricacion. |
| US13/994,097 US11306379B2 (en) | 2010-12-14 | 2011-12-06 | Thick products made of 7XXX alloy and manufacturing process |
| KR1020137017601A KR101900973B1 (ko) | 2010-12-14 | 2011-12-06 | 7xxx 합금으로 제조된 두꺼운 제품 및 제조 방법 |
| US17/678,591 US12252771B2 (en) | 2010-12-14 | 2022-02-23 | Thick products made of 7XXX alloy and manufacturing process |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1004865A FR2968675B1 (fr) | 2010-12-14 | 2010-12-14 | Produits epais en alliage 7xxx et procede de fabrication |
| FR10/04865 | 2010-12-14 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/994,097 A-371-Of-International US11306379B2 (en) | 2010-12-14 | 2011-12-06 | Thick products made of 7XXX alloy and manufacturing process |
| US17/678,591 Division US12252771B2 (en) | 2010-12-14 | 2022-02-23 | Thick products made of 7XXX alloy and manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012080592A1 true WO2012080592A1 (fr) | 2012-06-21 |
Family
ID=45478341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2011/000637 Ceased WO2012080592A1 (fr) | 2010-12-14 | 2011-12-06 | Produits epais en alliage 7xxx et procede de fabrication |
Country Status (10)
| Country | Link |
|---|---|
| US (2) | US11306379B2 (fr) |
| EP (1) | EP2652163B1 (fr) |
| JP (1) | JP6118728B2 (fr) |
| KR (1) | KR101900973B1 (fr) |
| CA (1) | CA2820768A1 (fr) |
| CL (1) | CL2013001716A1 (fr) |
| FR (1) | FR2968675B1 (fr) |
| MX (1) | MX354911B (fr) |
| PL (1) | PL2652163T3 (fr) |
| WO (1) | WO2012080592A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150090373A1 (en) * | 2013-09-30 | 2015-04-02 | Apple Inc. | Aluminum alloys with high strength and cosmetic appeal |
| US10208371B2 (en) | 2016-07-13 | 2019-02-19 | Apple Inc. | Aluminum alloys with high strength and cosmetic appeal |
| US11345980B2 (en) | 2018-08-09 | 2022-05-31 | Apple Inc. | Recycled aluminum alloys from manufacturing scrap with cosmetic appeal |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150368772A1 (en) * | 2014-06-19 | 2015-12-24 | Apple Inc. | Aluminum Alloys with Anodization Mirror Quality |
| EP3504086B1 (fr) | 2016-08-26 | 2022-08-03 | Shape Corp. | Procédé de formage à chaud pour le pliage transversal d'une poutre d'aluminium profilée pour former à chaud un composant structurel de véhicule |
| US11072844B2 (en) | 2016-10-24 | 2021-07-27 | Shape Corp. | Multi-stage aluminum alloy forming and thermal processing method for the production of vehicle components |
| WO2020099124A1 (fr) * | 2018-11-12 | 2020-05-22 | Aleris Rolled Products Germany Gmbh | Procédé de production d'une structure hydroformée à haute énergie à partir d'un alliage de la série 7xxx |
| CN114008229A (zh) * | 2019-06-24 | 2022-02-01 | 奥科宁克技术有限责任公司 | 改进的厚锻造7xxx铝合金及其制造方法 |
| FR3118632B1 (fr) * | 2021-01-05 | 2023-09-29 | Airbus Operations Sas | Procédé d’optimisation des propriétés en corrosion d’un assemblage d’au moins deux pièces réalisées en alliage à base d’aluminium assemblées par soudage par friction. |
| JP2022131546A (ja) * | 2021-02-26 | 2022-09-07 | Mknアルミニウム株式会社 | アルミニウム合金鋳塊及びその製造方法 |
| CN112981289B (zh) * | 2021-04-21 | 2021-08-03 | 中国航发北京航空材料研究院 | 一种7000系铝合金铸锭去应力退火及均匀化退火的方法 |
| CN113528866B (zh) * | 2021-06-16 | 2022-05-20 | 天津忠旺铝业有限公司 | 一种航空用高强耐腐蚀7xxx铝合金板材的制备方法 |
| CN115011850A (zh) * | 2022-05-10 | 2022-09-06 | 慈溪市宜美佳铝业有限公司 | 一种不易变形的铝型材及其淬火工艺 |
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| FR2341661A1 (fr) | 1976-02-18 | 1977-09-16 | Vmw Ranshofen Berndorf Ag | Alliage de fonte d'aluminium soudable, plus faconnable a chaud, resistant mieux a la corrosion et ayant en meme temps de meilleures proprietes mecaniques |
| JPH08144031A (ja) | 1994-11-28 | 1996-06-04 | Furukawa Electric Co Ltd:The | 強度と成形性に優れたAl−Zn−Mg系合金中空形材の製造方法 |
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2010
- 2010-12-14 FR FR1004865A patent/FR2968675B1/fr active Active
-
2011
- 2011-12-06 US US13/994,097 patent/US11306379B2/en active Active
- 2011-12-06 EP EP11808242.9A patent/EP2652163B1/fr active Active
- 2011-12-06 MX MX2013006848A patent/MX354911B/es active IP Right Grant
- 2011-12-06 CA CA2820768A patent/CA2820768A1/fr not_active Abandoned
- 2011-12-06 JP JP2013543846A patent/JP6118728B2/ja active Active
- 2011-12-06 PL PL11808242T patent/PL2652163T3/pl unknown
- 2011-12-06 KR KR1020137017601A patent/KR101900973B1/ko active Active
- 2011-12-06 WO PCT/FR2011/000637 patent/WO2012080592A1/fr not_active Ceased
-
2013
- 2013-06-13 CL CL2013001716A patent/CL2013001716A1/es unknown
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2022
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150090373A1 (en) * | 2013-09-30 | 2015-04-02 | Apple Inc. | Aluminum alloys with high strength and cosmetic appeal |
| JP2016538418A (ja) * | 2013-09-30 | 2016-12-08 | アップル インコーポレイテッド | 高い強度及び美的訴求力を有するアルミニウム合金 |
| JP2019073802A (ja) * | 2013-09-30 | 2019-05-16 | アップル インコーポレイテッドApple Inc. | 高い強度及び美的訴求力を有するアルミニウム合金 |
| US10597762B2 (en) * | 2013-09-30 | 2020-03-24 | Apple Inc. | Aluminum alloys with high strength and cosmetic appeal |
| US10208371B2 (en) | 2016-07-13 | 2019-02-19 | Apple Inc. | Aluminum alloys with high strength and cosmetic appeal |
| US10544493B2 (en) | 2016-07-13 | 2020-01-28 | Apple Inc. | Aluminum alloys with high strength and cosmetic appeal |
| US11345980B2 (en) | 2018-08-09 | 2022-05-31 | Apple Inc. | Recycled aluminum alloys from manufacturing scrap with cosmetic appeal |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2652163B1 (fr) | 2018-09-19 |
| US20130284322A1 (en) | 2013-10-31 |
| MX2013006848A (es) | 2013-11-01 |
| EP2652163A1 (fr) | 2013-10-23 |
| US20220389558A1 (en) | 2022-12-08 |
| CL2013001716A1 (es) | 2013-12-06 |
| KR20140012628A (ko) | 2014-02-03 |
| US11306379B2 (en) | 2022-04-19 |
| PL2652163T3 (pl) | 2019-05-31 |
| JP2014505786A (ja) | 2014-03-06 |
| FR2968675A1 (fr) | 2012-06-15 |
| MX354911B (es) | 2018-03-26 |
| US12252771B2 (en) | 2025-03-18 |
| KR101900973B1 (ko) | 2018-09-20 |
| FR2968675B1 (fr) | 2013-03-29 |
| JP6118728B2 (ja) | 2017-04-19 |
| CA2820768A1 (fr) | 2012-06-21 |
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