WO2020247178A1 - Alliages d'aluminium renfermant du silicium, du magnésium, du cuivre et du zinc - Google Patents

Alliages d'aluminium renfermant du silicium, du magnésium, du cuivre et du zinc Download PDF

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WO2020247178A1
WO2020247178A1 PCT/US2020/033806 US2020033806W WO2020247178A1 WO 2020247178 A1 WO2020247178 A1 WO 2020247178A1 US 2020033806 W US2020033806 W US 2020033806W WO 2020247178 A1 WO2020247178 A1 WO 2020247178A1
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aluminum alloy
sheet product
mpa
elongation
new aluminum
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PCT/US2020/033806
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English (en)
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Timothy A. Hosch
James Daniel Bryant
Dirk C. Mooy
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Arconic Technologies Llc
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Priority to CA3141154A priority Critical patent/CA3141154A1/fr
Priority to JP2021569878A priority patent/JP2022534895A/ja
Priority to EP20818378.0A priority patent/EP3980569A4/fr
Priority to KR1020217038079A priority patent/KR20220006078A/ko
Priority to CN202080040872.4A priority patent/CN113924377A/zh
Publication of WO2020247178A1 publication Critical patent/WO2020247178A1/fr
Priority to US17/456,212 priority patent/US20220081741A1/en

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    • 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
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C22C21/10—Alloys based on aluminium 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
    • C22C21/12—Alloys based on aluminium with copper 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
    • C22C21/14—Alloys based on aluminium with copper 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • 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
    • C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
    • 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
    • C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
    • 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
    • C22F1/043—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 silicon as the next major constituent
    • 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
    • C22F1/047—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 magnesium as the next major constituent
    • 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
    • C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
    • 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
    • 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
    • C22F1/057—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 copper as the next major constituent

Definitions

  • [001] 6xxx aluminum alloys are aluminum alloys having silicon and magnesium to produce the precipitate magnesium silicide (Mg2Si).
  • the alloy 6061 has been used in various applications for several decades. However, improving one or more properties of an aluminum alloy without degrading other properties is elusive. For automotive applications, a sheet having good formability prior to thermal treatment but with high strength after thermal treatment would be useful.
  • the present patent application relates to new aluminum alloys and methods for making the same.
  • the new aluminum alloys generally include from 0.70 to 1.4 wt. % Si, from 0.70 to 1.3 wt. % Mg, wherein (wt. % Mg) / (wt. % Si) is not greater than 1.40, from 0.70 to 3.0 wt. % Zn, from 0.55 to 1.3 wt. % Cu, wherein the total amount of Si+Mg+Zn+Cu is not greater than 4.25 wt. %, from 0.01 to 0.30 wt. % Fe, up to 0.70 wt. % Mn, up to 0.15 wt.
  • the new aluminum alloys may realize an improved combination of properties, such as an improved combination of two or more of naturally aged strength, paint bake strength, T6 strength, formability, ductility, and corrosion resistance.
  • the new aluminum alloys may be used in a variety of applications, such as in automotive applications (e.g., as a sheet product).
  • the new aluminum alloys generally comprises (and in some instances consist essentially of, or consist of) from 0.70 to 1.4 wt. % Si, from 0.70 to 1.3 wt. % Mg, wherein (wt. % Mg) / (wt. % Si) is not greater than 1.40, from 0.70 to 3.0 wt. % Zn, from 0.55 to 1.3 wt. % Cu, wherein the total amount of Si+Mg+Zn+Cu is not greater than 4.25 wt. %, from 0.01 to 0.30 wt. % Fe, up to 0.70 wt. % Mn, up to 0.15 wt. % Cr, up to 0.20 wt.
  • % Zr up to 0.20 wt. % V, and up to 0.25 wt. % Ti, the balance being aluminum, optional incidental elements and impurities. Using these specific amounts of elements may result in unique and useful products for use in, for instance, automotive applications, where good formability prior to thermal treatment is required, high strength after thermal treatment is also required.
  • the new aluminum alloys generally include from 0.70 to 1.4 wt. % Si. Silicon may facilitate strength. As shown by the below examples, use of silicon outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.75 wt. % Si.
  • a new aluminum alloy includes at least 0.80 wt. % Si.
  • a new aluminum alloy includes at least 0.85 wt. % Si.
  • a new aluminum alloy includes not greater than 1.35 wt. % Si.
  • a new aluminum alloy includes not greater than 1.30 wt. % Si.
  • a new aluminum alloy includes not greater than 1.25 wt. % Si.
  • a new aluminum alloy includes not greater than 1.20 wt. % Si. In yet another embodiment, a new aluminum alloy includes not greater than 1.15 wt. % Si. In another embodiment, a new aluminum alloy includes not greater than 1.10 wt. % Si. In yet another embodiment, a new aluminum alloy includes not greater than 1.05 wt. % Si.
  • the new aluminum alloys generally include from 0.70 to 1.3 wt. % Mg.
  • Magnesium may facilitate strength. As shown by the below examples, use of magnesium outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.75 wt. % Mg.
  • a new aluminum alloy includes at least 0.80 wt. % Mg.
  • a new aluminum alloy includes not greater than 1.25 wt. % Mg.
  • a new aluminum alloy includes not greater than 1.20 wt. % Mg.
  • a new aluminum alloy includes not greater than 1.15 wt. % Mg.
  • a new aluminum alloy includes not greater than 1.10 wt. % Mg.
  • a new aluminum alloy includes not greater than 1.05 wt. % Mg.
  • the weight ratio of Mg: Si is generally not greater than 1.4: 1.
  • the appropriate Mg: Si ratio may facilitate corrosion resistance at applicable strength levels. As shown by the below examples, use of a Mg: Si ratio outside this range may be detrimental.
  • a weight ratio of Mg: Si is not greater than 1.3 : 1.
  • a weight ratio of Mg: Si is not greater than 1.2: 1.
  • a weight ratio of Mg: Si is at least 0.7: 1.
  • a weight ratio of Mg: Si is at least 0.8: 1.
  • a weight ratio of Mg: Si is at least 0.9: 1.
  • the new aluminum alloys generally include from 0.70 to 3.0 wt. % Zn.
  • Zinc may facilitate strength and the appropriate natural aging response. As shown by the below examples, use of zinc outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.75 wt. % Zn.
  • a new aluminum alloy includes at least 0.85 wt. % Zn.
  • a new aluminum alloy includes at least 0.95 wt. % Zn.
  • a new aluminum alloy includes at least 1.0 wt. % Zn.
  • a new aluminum alloy includes at least 1.05 wt. % Zn.
  • a new aluminum alloy includes not greater than 2.8 wt. % Zn. In another embodiment, a new aluminum alloy includes not greater than 2.6 wt. % Zn. In yet another embodiment, a new aluminum alloy includes not greater than 2.4 wt. % Zn. In another embodiment, a new aluminum alloy includes not greater than 2.2 wt. % Zn. In yet another embodiment, a new aluminum alloy includes not greater than 2.0 wt. % Zn. In another embodiment, a new aluminum alloy includes not greater than 1.8 wt. % Zn.
  • the new aluminum alloys generally include from 0.55 to 1.3 wt. % Cu. Copper may facilitate strength, corrosion resistance and natural aging response. As shown by the below examples, use of copper outside this range may be detrimental.
  • a new aluminum alloy includes at least 0.60 wt. % Cu. In another embodiment, a new aluminum alloy includes at least 0.65 wt. % Cu. In yet another embodiment, a new aluminum alloy includes at least 0.70 wt. % Cu. In one embodiment, a new aluminum alloy includes not greater than 1.25 wt. % Cu. In another embodiment, a new aluminum alloy includes not greater than 1.20 wt. % Cu. In yet another embodiment, a new aluminum alloy includes not greater than 1.15 wt. % Cu. In another embodiment, a new aluminum alloy includes not greater than 1.10 wt. % Cu. In yet another embodiment, a new aluminum alloy includes not greater than 1.05 wt. % Cu.
  • solute in the alloy is limited, wherein the total amount of Si+Mg+Zn+Cu is not greater than 4.25 wt. %. As shown by the below examples, use of too much solute may be detrimental. Thus, the stated limit.
  • the new aluminum alloys generally include from 0.01 to 0.30 wt. % Fe. Iron may facilitate a proper grain structure and using more than 0.10 wt. % Fe iron may be cost effective. Use of iron outside this range may be cost ineffective and/or detrimental. The amount of iron in the alloy should be restricted such that large primary particles are avoided / restricted / limited during production of aluminum alloy products.
  • a new aluminum alloy includes at least 0.05 wt. % Fe.
  • a new aluminum alloy includes at least 0.10 wt. % Fe.
  • a new aluminum alloy includes at least 0.12 wt. % Fe.
  • a new aluminum alloy includes not greater than 0.25 wt. % Fe.
  • a new aluminum alloy includes not greater than 0.22 wt. % Fe. In yet another embodiment, a new aluminum alloy includes not greater than 0.19 wt. % Fe. In another embodiment, a new aluminum alloy includes not greater than 0.16 wt. % Fe. [0011] As noted above, the new aluminum alloys may include up to 0.70 wt. % Mn. Manganese may facilitate the proper grain structure. Use of manganese outside this range may be detrimental. The amount of manganese in the alloy should be restricted such that large primary particles are avoided / restricted / limited during production of aluminum alloy products. In one embodiment, a new aluminum alloy includes at least 0.05 wt. % Mn.
  • a new aluminum alloy includes at least 0.10 wt. % Mn. In yet another embodiment, a new aluminum alloy includes at least 0.15 wt. % Mn. In one embodiment, a new aluminum alloy includes not greater than 0.60 wt. % Mn. In another embodiment, a new aluminum alloy includes not greater than 0.50 wt. % Mn. In yet another embodiment, a new aluminum alloy includes not greater than 0.45 wt. % Mn. In another embodiment, a new aluminum alloy includes not greater than 0.40 wt. % Mn.
  • the new aluminum alloys include not greater than 0.15 wt. % Cr. Using more than 0.15 wt. % chromium may be detrimental to the grain structure and may causes issues with alloy recyclability.
  • a new aluminum alloy includes not greater than 0.12 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.10 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.08 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.06 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.04 wt. % Cr.
  • a new aluminum alloy includes not greater than 0.03 wt. % Cr. In yet another embodiment, a new aluminum alloy includes not greater than 0.02 wt. % Cr. In another embodiment, a new aluminum alloy includes not greater than 0.01 wt. % Cr.
  • the new aluminum alloys include not greater than 0.20 wt. % Zr. Zirconium is less preferred than manganese for grain structure control, but still may be useful. The amount of zirconium in the alloy should be restricted such that large primary particles are avoided / restricted / limited during production of aluminum alloy products.
  • a new aluminum alloy includes not greater than 0.15 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.10 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.08 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.03 wt. % Zr.
  • a new aluminum alloy includes not greater than 0.01 wt. % Zr. In one embodiment, a new aluminum alloy includes at least 0.01 wt. % Zr (e.g., when Zr is added/used to the alloy for grain structure control.) In another embodiment, a new aluminum alloy includes at least 0.05 wt. % Zr. In one embodiment, a new aluminum alloy includes from 0.07 to 0.15 wt. % Zr.
  • the new aluminum alloys include not greater than 0.20 wt. % V. Vanadium is less preferred than manganese for grain structure control, but still may be useful. The amount of vanadium in the alloy should be restricted such that large primary particles are avoided / restricted / limited during production of aluminum alloy products.
  • a new aluminum alloy includes not greater than 0.15 wt. % V.
  • a new aluminum alloy includes not greater than 0.10 wt. % V.
  • a new aluminum alloy includes not greater than 0.08 wt. % V.
  • a new aluminum alloy includes not greater than 0.03 wt. % V.
  • a new aluminum alloy includes not greater than 0.01 wt. % V. In one embodiment, a new aluminum alloy includes at least 0.01 wt. % V (e.g., when V is added/used to the alloy for grain structure control.) In another embodiment, a new aluminum alloy includes at least 0.05 wt. % V. In one embodiment, a new aluminum alloy includes from 0.07 to 0.15 wt. % V.
  • the new aluminum alloys include not greater than 0.25 wt. % Ti. Titanium may be used during casting for grain refinement. Higher levels of titanium may also facilitate corrosion resistance. The amount of titanium in the alloy should be restricted such that large primary particles are avoided / restricted / limited during production of alloy products.
  • a new aluminum alloy includes at least 0.005 wt. % Ti.
  • a new aluminum alloy includes at least 0.01 wt. %Ti.
  • a new aluminum alloy includes at least 0.02 wt. %Ti.
  • a new aluminum alloy includes at least 0.05 wt. % Ti.
  • a new a new aluminum alloy includes not greater than 0.20 wt. %Ti. In another embodiment, a new a new aluminum alloy includes not greater than 0.15 wt. %Ti. In another embodiment, a new aluminum alloy includes not greater than 0.12 wt. % Ti. In yet another embodiment, a new a new aluminum alloy includes not greater than 0.10 wt. %Ti. In another embodiment, a new a new aluminum alloy includes not greater than 0.08 wt. %Ti. In yet another embodiment, a new a new aluminum alloy includes not greater than 0.05 wt. %Ti. In another embodiment, a new a new aluminum alloy includes not greater than 0.03 wt. %Ti.
  • a new a new aluminum alloy includes from 0.005 to 0.10 wt. % Ti. In another embodiment, a new aluminum alloy includes from 0.01 to 0.05 wt. % Ti. In yet another embodiment, a new aluminum alloy includes from 0.01 to 0.03 wt. % Ti.
  • the titanium may be in elemental form or in the form of compounds (e.g., T1B2 or TiC).
  • incidental elements means those elements or materials, other than the above listed elements, that may optionally be added to the alloy to assist in the production of the alloy.
  • incidental elements include casting aids, such as grain refiners and deoxidizers.
  • Optional incidental elements may be included in the alloy in a cumulative amount of up to 1.0 wt. %.
  • one or more incidental elements may be added to the alloy during casting to reduce or restrict (and is some instances eliminate) ingot cracking due to, for example, oxide fold, pit and oxide patches. These types of incidental elements are generally referred to herein as deoxidizers.
  • Examples of some deoxidizers include Ca, Sr, and Be.
  • calcium (Ca) is included in the alloy, it is generally present in an amount of up to about 0.05 wt. %, or up to about 0.03 wt. %.
  • Ca is included in the alloy in an amount of about 0.001-0.03 wt. % or about 0.05 wt. %, such as 0.001-0.008 wt. % (or 10 to 80 ppm).
  • Strontium (Sr) may be included in the alloy as a substitute for Ca (in whole or in part), and thus may be included in the alloy in the same or similar amounts as Ca.
  • Be beryllium
  • some embodiments of the alloy are substantially Be-free.
  • Be is included in the alloy, it is generally present in an amount of up to about 20 ppm.
  • Incidental elements may be present in minor amounts, or may be present in significant amounts, and may add desirable or other characteristics on their own without departing from the alloy described herein, so long as the alloy retains the desirable characteristics described herein. It is to be understood, however, that the scope of this disclosure should not/cannot be avoided through the mere addition of an element or elements in quantities that would not otherwise impact on the combinations of properties desired and attained herein.
  • the new aluminum alloys may contain low amounts of impurities.
  • a new aluminum alloy includes not greater than 0.15 wt. %, in total, of the impurities, and wherein the new aluminum alloy includes not greater than 0.05 wt. % of each of the impurities.
  • a new aluminum alloy includes not greater than 0.10 wt. %, in total, of the impurities, and wherein the new aluminum alloy includes not greater than 0.03 wt. % of each of the impurities.
  • the new aluminum alloys may be useful in a variety of product forms, including ingot or billet, wrought product forms (plate, forgings and extrusions), shape castings, additively manufactured products, and powder metallurgy products, for instance.
  • the new aluminum alloys may be processed into a variety of wrought forms, such as in rolled form (sheet, plate), as an extrusion, or as a forging, and in a variety of tempers.
  • the new aluminum alloys may be cast (e.g., direct chill cast or continuously cast), and then worked (hot and/or cold worked) into the appropriate product form (sheet, plate, extrusion, or forging).
  • the new aluminum alloys may be processed to one of a T temper, a W temper, or an F temper as per ANSI H35.1 (2009).
  • a new aluminum alloy is processed to a“T temper” (thermally treated).
  • the new aluminum alloys may be processed to any of a Tl, T2, T3, T4, T5, T6, T7, T8, T9 or T10 temper as per ANSI H35.1 (2009).
  • the product is processed to a T43 temper (e.g., as per the below examples).
  • the product is processed to a T6 temper (e.g., as per the below examples).
  • a new aluminum alloy is processed to an“W temper” (solution heat treated).
  • no solution heat treatment is applied after working the aluminum alloy into the appropriate product form, and thus the new aluminum alloys may be processed to an“F temper” (as fabricated).
  • a new aluminum alloys is a sheet product.
  • the sheet product has a thickness of from 1.0 to 4.0 mm.
  • the sheet product is processed to a T4 temper.
  • the sheet product is processed to a T43 temper.
  • the sheet product is processed to a T43 temper and then paint baked (e.g., by heating at 180°C for 20 minutes).
  • the sheet product is processed to a T43 temper, then paint baked, and then artificially aged to a T6 temper (e.g., by heating at 180°C for 8 hours).
  • T6 temper e.g., by heating at 180°C for 8 hours.
  • the new aluminum alloys may realize an improved combination of properties.
  • the new aluminum alloy is a sheet product having a thickness of from 1.0 to 4.0 mm, and this aluminum alloy sheet product realizes at least one of the following properties:
  • TYS-7NA a TYS-LT of not greater than 155 MPa at 7 days of natural aging
  • TYS- 90NA a TYS-LT of not greater than 175 MPa at 90 days of natural aging
  • the aluminum alloy sheet product realizes at least two of the above properties (i)-(vi). In another embodiment, the aluminum alloy sheet product realizes at least three of the above properties (i)-(vi). In yet another embodiment, the aluminum alloy sheet product realizes at least four of the above properties (i)-(vi). In another embodiment, the aluminum alloy sheet product realizes at least five of the above properties (i)-(vi). In yet another embodiment, the aluminum alloy sheet product realizes all of the above properties (i)-
  • “TYS-LT” means the long transverse tensile yield strength (0.2% offset) of a product as measured in accordance with ASTM E8 and B557.
  • “TYS-7NA” means the long transverse tensile yield strength of a product at seven days of natural aging.
  • “TYS-90NA” means the long transverse tensile yield strength of a product at ninety days of natural aging.
  • paint baking is the application of heat to the product to cure paints or other polymers thereon.
  • a typically automotive paint bake is heating to 180°C and then holding at 180°C for 20 minutes (e.g., in a furnace), followed by air cooling to ambient.
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 155 MPa at 7 days of natural aging (i.e., TYS-7NA ⁇ 155 MPa). Low strength after natural aging is important to allow for subsequent forming of the material (e.g., into automotive sheet components).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 150 MPa at 7 days of natural aging (i.e., TYS-7NA ⁇ 150 MPa).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 145 MPa at 7 days of natural aging (i.e., TYS-7NA ⁇ 145 MPa).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 175 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 175 MPa). Low strength after natural aging is important to allow for subsequent forming of the material (e.g., into automotive sheet components). Further, automotive sheet products may lie in inventory for several months, so the natural aging response / strength needs to be / remain low for extended periods of time. In one embodiment, a new aluminum alloy sheet product may realize a TYS- LT of not greater than 170 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 170 MPa).
  • a new aluminum alloy sheet product may realize a TYS-LT of not greater than 165 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 165 MPa). In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of not greater than 160 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 160 MPa). In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of not greater than 155 MPa at 90 days of natural aging (i.e., TYS-90NA ⁇ 155 MPa).
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 20 MPa. That is, the strength of the sheet product increases by not greater than 20 MPa from 7 days of natural aging to 90 days of natural aging.
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 18 MPa.
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 15 MPa.
  • a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 12 MPa. In yet another embodiment, a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 10 MPa. In another embodiment, a new aluminum alloy sheet product may realize a (TYS-90NA) minus (TYS-7NA) of not greater than 8 MPa.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 235 MPa when naturally aged for 30 days followed by paint baking at 180°C for 20 minutes. (The phrase“when naturally aged for 30 days followed by paint baking at 180°C for 20 minutes” is abbreviated herein as“30 days NA + paint bake.”) Paint baking generally occurs after natural aging and after the product has been formed, so high post-paint baking strength may be important.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 240 MPa 30 days NA + paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 245 MPa 30 days NA + paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 250 MPa 30 days NA + paint bake. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 255 MPa 30 days NA + paint bake. In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 260 MPa 30 days NA + paint bake. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 265 MPa 30 days NA + paint bake. In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 270 MPa 30 days NA + paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 230 MPa when naturally aged for 90 days followed by paint baking at 180°C for 20 minutes. (The phrase“when naturally aged for 90 days followed by paint baking at 180°C for 20 minutes” is abbreviated herein as“90 days NA + paint bake”) It may be important for the strength decrease after paint bake to be low (e.g., to ensure the product retains a high strength).
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 235 MPa 90 days NA + paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 240 MPa 90 days NA + paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 245 MPa 90 days NA + paint bake. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 250 MPa 90 days NA + paint bake.
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 350 MPa when naturally aged for 30 days followed by artificial aging at 180°C for 8 hours.
  • the phrase“when naturally aged for 30 days followed by artificial aging at 180°C for 8 hours” is abbreviated herein as“30 days NA + AA”
  • it may be useful to artificially age a product e.g., a naturally aged product and/or a paint baked product
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 355 MPa 30 days NA + AA .
  • a new aluminum alloy sheet product may realize a TYS-LT of at least 360 MPa 30 days NA + AA. In yet another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 365 MPa 30 days NA + AA. In another embodiment, a new aluminum alloy sheet product may realize a TYS-LT of at least 370 MPa 30 days NA + AA.
  • the T6 tempering by artificial aging may be heating for any suitable period(s) of time and at any suitable temperature(s).
  • the T6 tempering is heating at 180°C for 8 hours, or a substantially similar aging condition, as shown above.
  • aging temperatures and/or times may be adjusted based on well- known aging principles and/or formulas.
  • a new aluminum alloy sheet may also realize other important properties, such as ductility and corrosion resistance.
  • a new aluminum alloy sheet product may realize an elongation (4D) of at least 15% in the T43 temper when tested in accordance with ASTM E8 and B557.
  • a new aluminum alloy sheet product realizes an elongation of at least 18% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 20% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 22% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 24% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 26% in the T43 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 28% in the T43 temper.
  • a new aluminum alloy sheet product may realize an elongation (4D) of at least 10% in the paint baked condition (e.g., T43+paint bake) when tested in accordance with ASTM E8 and B557.
  • a new aluminum alloy sheet product realizes an elongation of at least 12% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 14% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 16% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 18% in the paint baked condition.
  • a new aluminum alloy sheet product realizes an elongation of at least 20% in the paint baked condition.
  • a new aluminum alloy sheet product may realize an elongation (4D) of at least 10% in the T6 temper when tested in accordance with ASTM E8 and B557.
  • a new aluminum alloy sheet product realizes an elongation of at least 11% in the T6 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 12% in the T6 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 13% in the T6 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 14% in the T6 temper.
  • a new aluminum alloy sheet product realizes an elongation of at least 15% in the T6 temper.
  • a new aluminum alloy sheet product is corrosion resistant.
  • the corrosion resistance is at least intergranular corrosion resistance.
  • the corrosion resistance is at least filiform corrosion resistance.
  • the corrosion resistance is both intergranular corrosion resistance and filiform corrosion resistance. Intergranular corrosion resistance is to be measured in accordance with ASTM G110 (5 specimens). Filiform corrosion resistance is to be measured in accordance with ASTM G85-2, and wherein, after exposing samples for 3 weeks, the longest filiform corrosion resistance perpendicular to each of three separate scribes is to be determined.
  • a new aluminum alloy sheet product realizes a maximum depth of attack of not greater than 225 micrometers and an average depth of attack of not greater than 150 micrometers.
  • a new aluminum alloy sheet product realizes a maximum track length of not greater than 0.35 inch, and with at least 8 tracks being tested. In another embodiment, a new aluminum alloy sheet product realizes a maximum track length of not greater than 0.30 inch, and with at least 8 tracks being tested.
  • a new aluminum alloy product may be crack-free after forming (e.g., when pressed / formed into an automotive component, such as an automotive panel).
  • a new aluminum alloy product is crack-free after forming (e.g., when pressed / formed into an automotive panel / component), is strong (after paint baking and/or T6 tempering, and as defined above), and as is corrosion resistant.
  • the new aluminum alloy described herein may be used in a variety of applications, such as an automotive, rail, aerospace, or consumer electronics application.
  • a new aluminum alloy may be formed into an automotive part.
  • automotive parts include automotive bodies and automotive panels.
  • Non-limiting examples of automotive panels may be outer panels, inner panels for use in car doors, car hoods, or car trunks (deck lids), among others.
  • One example of an automotive body product may be a structural component, which may be used in welding together sheet metal components of a car body (e.g., body-in-white).
  • the new aluminum alloys may also be used in other transportation applications, such as light or heavy trucks.
  • Consumer electronic product applications include laptop computer cases, battery cases, among other stamped and formed products.
  • a aluminum alloy sheet product comprising:
  • the balance being aluminum, optional incidental elements and impurities;
  • the aluminum alloy sheet product has a thickness of from 1.0 to 4.0 mm;
  • the aluminum sheet product realizes at least one of the following properties:
  • TYS-7NA a TYS-LT of not greater than 155 MPa at 7 days of natural aging
  • TYS- 90NA a TYS-LT of not greater than 175 MPa at 90 days of natural aging
  • a TYS-LT of at least 350 MPa when naturally aged for 30 days and then artificially aged at 180°C for 8 hours.
  • Clause 3 The aluminum alloy sheet product of clauses 1-2, wherein the aluminum alloy includes not greater than 1.35 wt. % Si, or not greater than 1.30 wt. % Si, or not greater than 1.25 wt. % Si, or not greater than 1.20 wt. % Si, or not greater than 1.15 wt. % Si, or not greater than 1.10 wt. % Si, or not greater than 1.05 wt. % Si.
  • Clause 4 The aluminum alloy sheet product of any of clauses 1-3, wherein the aluminum alloy includes at least 0.75 wt. % Mg, or at least 0.80 wt. % Mg.
  • Clause 5 The aluminum alloy sheet product of any of clauses 1-4, wherein the aluminum alloy includes not greater than 1.25 wt. % Mg, or not greater than 1.20 wt. % Mg, or not greater than 1.15 wt. % Mg, or not greater than 1.10 wt. % Mg, or not greater than 1.05 wt. % Mg.
  • Clause 7 The aluminum alloy sheet product of any of clauses 1-6, wherein (wt. % Mg) / (wt. % Si) is at least 0.7: 1, or at least 0.8: 1, or at least 0.9: 1.
  • Clause 8 The aluminum alloy sheet product of any of clauses 1-7, wherein the aluminum alloy includes at least 0.75 wt. % Zn, or at least 0.85 wt. % Zn, or at least 0.95 wt. % Zn, or at least 1.0 wt. % Zn, or at least 1.05 wt. % Zn.
  • Clause 9 The aluminum alloy sheet product of any of clauses 1-8, wherein the aluminum alloy includes not greater than 2.8 wt. % Zn, or not greater than 2.6 wt. % Zn, or not greater than 2.4 wt. % Zn, or not greater than 2.2 wt. % Zn, or not greater than 2.0 wt. % Zn, or not greater than 1.8 wt. % Zn.
  • Clause 10 The aluminum alloy sheet product of any of clauses 1-9, wherein the aluminum alloy includes at least 0.60 wt. % Cu, or at least 0.65 wt. % Cu, or at least 0.70 wt. % Cu.
  • Clause 11 The aluminum alloy sheet product of any of clauses 1-10, wherein the aluminum alloy includes not greater than 1.25 wt. % Cu, or not greater than 1.20 wt. % Cu, or not greater than 1.15 wt. % Cu, or not greater than 1.10 wt. % Cu, or not greater than 1.05 wt. % Cu.
  • Clause 12 The aluminum alloy sheet product of any of clauses 1-11, wherein the aluminum alloy includes at least 0.05 wt. % Fe, or at least 0.10 wt. % Fe, or at least 0.12 wt. % Fe.
  • Clause 13 The aluminum alloy sheet product of any of clauses 1-12, wherein the aluminum alloy includes not greater than 0.25 wt. % Fe, or not greater than 0.22 wt. % Fe, or not greater than 0.19 wt. % Fe, or not greater than 0.16 wt. % Fe.
  • Clause 14 The aluminum alloy sheet product of any of clauses 1-13, wherein the aluminum alloy includes at least 0.05 wt. % Mn, or at least 0.10 wt. % Mn, or at least 0.15 wt. % Mn.
  • Clause 15 The aluminum alloy sheet product of any clauses 1-14, wherein the aluminum alloy includes not greater than 0.60 wt. % Mn, or not greater than 0.50 wt. % Mn, or not greater than 0.45 wt. % Mn, or not greater than 0.40 wt. % Mn.
  • Clause 16 The aluminum alloy sheet product of any of clauses 1-15, wherein the aluminum alloy includes not greater than 0.12 wt. % Cr, or not greater than 0.10 wt. % Cr, or not greater than 0.08 wt. % Cr, or not greater than 0.06 wt. % Cr, or not greater than 0.04 wt. % Cr, or not greater than 0.03 wt. % Cr, or not greater than 0.02 wt. % Cr, or not greater than 0.01 wt. % Cr.
  • Clause 17 The aluminum alloy sheet product of any of clauses 1-16, wherein the aluminum alloy includes not greater than 0.15 wt. % Zr, or not greater than 0.10 wt. % Zr, or not greater than 0.08 wt. % Zr, or not greater than 0.05 wt. % Zr, or not greater than 0.03 wt. % Zr.
  • Clause 18 The aluminum alloy sheet product of any of clauses 1-17, wherein the aluminum alloy includes at least 0.01 wt. % Zr.
  • Clause 19 The aluminum alloy sheet product of any of clauses 1-18, wherein the aluminum alloy includes not greater than 0.15 wt. % V, or not greater than 0.10 wt. % V, or not greater than 0.08 wt. % V, or not greater than 0.05 wt. % V, or not greater than 0.03 wt. % V.
  • Clause 20 The aluminum alloy sheet product of any of clauses 1-19, wherein the aluminum alloy includes at least 0.01 wt. % V.
  • Clause 21 The aluminum alloy sheet product of any of clauses 1-20, wherein the aluminum alloy includes not greater than 0.12 wt. % Ti, or not greater than 0.10 wt. % Ti.
  • Clause 22 The aluminum alloy sheet product of any of clauses 1-21, wherein the aluminum alloy includes at least 0.01 wt. % Ti or at least 0.02 wt. % Ti, or at least 0.05 wt. % Ti.
  • Clause 23 An automotive sheet product made from the aluminum alloy sheet product of any of clauses 1-22.
  • Clause 29 The automotive sheet product of any of clauses 23-28, wherein the sheet product realizes property (i), and wherein property (i) is not greater than 155 MPa, or not greater than 150 MPa, or not greater than 145 MPa.
  • Clause 30 The automotive sheet product of any of clauses 23-29, wherein the sheet product realizes property (ii), and wherein property (ii) is not greater than 175 MPa, or not greater than 170 MPa, or not greater than 165 MPa, or not greater than 160 MPa, or not greater than 155 MPa.
  • Clause 31 The automotive sheet product of any of clauses 23-30, wherein the sheet product realizes property (iii), and wherein property (iii) is not greater than 20 MPa, or not greater than 18 MPa, or not greater than 15 MPa, or not greater than 12 MPa, or not greater than 10 MPa, or not greater than 8 MPa.
  • Clause 32 The automotive sheet product of any of clauses 23-31, wherein the sheet product realizes property (iv), and wherein property (iv) is at least 235 MPa, or at least 240 MPa, or at least 250 MPa, or at least 255 MPa, or at least 260 MPa, or at least 265 MPa, or at least 270 MPa.
  • Clause 33 The automotive sheet product of any of clauses 23-32, wherein the sheet product realizes property (v), and wherein property (v) is at least 230 MPa, or at least 235 MPa, or at least 240 MPa, or at least 245 MPa, or at least 250 MPa.
  • Clause 34 The automotive sheet product of any of clauses 23-33, wherein the sheet product realizes property (vi), and wherein property (vi) is at least 350 MPa, or at least 355 MPa, or at least 360 MPa, or at least 365 MPa, or at least 370 MPa.
  • Clause 35 The automotive sheet product of any of clauses 23-34, wherein the sheet product realizes an elongation of at least 15% in the T43 temper, or an elongation of at least 18%, or an elongation of at least 20%, or an elongation of at least 22%, or an elongation of at least 24%, or an elongation of at least 26%, or an elongation of at least 28%.
  • Clause 36 The automotive sheet product of any of clauses 23-35, wherein the sheet product realizes an elongation of at least 10% after paint baking at 180°C for 20 minutes, or an elongation of at least 12%, or an elongation of at least 14%, or an elongation of at least 16%, or an elongation of at least 18%, or an elongation of at least 20%.
  • Clause 37 The automotive sheet product of any of clauses 23-36, wherein the sheet product realizes an elongation of at least 10% after artificial aging at 180°C for 8 hours, or an elongation of at least 11%, or an elongation of at least 12%, or an elongation of at least 13%, or an elongation of at least 14%, or an elongation of at least 15%.
  • Clause 38 The automotive sheet product of any of clauses 23-37, wherein the sheet product is resistant to intergranular corrosion.
  • Clause 40 The automotive sheet product of any of clauses 23-37, wherein the sheet product is crack-free. 17. Miscellaneous
  • the term“or” is an inclusive“or” operator, and is equivalent to the term“and/or,” unless the context clearly dictates otherwise.
  • the term“based on” is not exclusive and allows for being based on additional factors not described, unless the context clearly dictates otherwise.
  • the meaning of “a,”“an,” and“the” include plural references, unless the context clearly dictates otherwise.
  • the meaning of“in” includes“in” and“on”, unless the context clearly dictates otherwise.
  • each alloy was 0.02 - 0.03 wt. % Ti, aluminum, incidental elements and impurities, where each alloy contained not greater than 0.03 wt. % of any one impurity, and where each alloy contained not greater than 0.10 wt. %, in total, of all impurities.
  • Alloy 29 is an AA6055-style alloy as per U.S. Patent No. 6,537,392.
  • the Aluminum Association composition limits on the AA6055 alloy are as follows: 0.6-1.2 wt. % Si, 0.30 (max) wt. % Fe, 0.50 - 1.0 wt. % Cu, 0.10 (max) wt. % Mn, 0.7 - 1.1 wt. % Mg, 0.20 - 0.30 wt. % Cr, 0.55 - 0.9 wt. % Zn, 0.10 (max) wt. % Ti, 0.05 (max) wt. % impurities, 0.15 (max) wt.
  • Alloys 18, 21-22 and 27 are invention alloys. Alloys 1-17, 19-20 and 23-26 and 28-30 are non invention alloys and are highlighted in gray.
  • the ingots were homogenized and then rolled to final gauge sheet products.
  • the final gauge sheet products had a thickness of 2 mm.
  • the final gauge sheet products were then solution heat treated, quenched to room temperature, and then re-heated to a pre-aging temperature of 82°C (179.6°F), and then subject to a simulated coil cool by holding in a furnace programmed to cool at a prescribed cooling rate (consistent with Newtonian cooling) to bring the alloys to a T43 temper.
  • the natural aging response of the alloys was then evaluated by measuring each alloy’s mechanical properties at 7 and 90 days of natural aging (as measured from the time the alloys were quenched after solution heat treatment).
  • the paint bake response of the T43 tempered alloys was also tested by heating to 180°C for 20 minutes.
  • the artificial aging response of the alloys was also tested by aging the T43 tempered alloy at 180°C for 8 hours (a T6-type temper).
  • non-invention alloys 1-8, 10, 16, 26, and 28 fail to meet the parameter of a TYS-LT of not greater than 155 MPa at 7 days of natural aging and/or not greater than 175 MPa at 90 days of natural aging. Further, the strength of non invention alloys 8, 13, 17, 20, and 30 increased too much (more than 20 MPa) between 7 days of natural aging and 90 days of natural aging. Achieving strengths of not greater than 155 MPa at 7 days of natural aging, not greater than 175 MPa at 90 days of natural aging, and with not greater than a 20 MPa increase in strength from 7 days of natural aging to 90 days of natural aging is important for formability purposes.
  • Paint Bake Properties As shown, non-invention alloys 9, 11, 13-15, 17, 20, 23 and 25 realized insufficient post paint baking strengths, having a TYS-LT of less than 235 MPa 30 days after paint baking and/or having a TYS-LT of less than 230 MPa 90 days after paint baking. Low post paint baking strength and loss of strength over time after paint baking is not acceptable for most automotive applications.
  • the intergranular corrosion resistance of the alloys is generally acceptable.
  • the filiform corrosion of alloys 6-7, 10, 14 and 24 is too high on a maximum length basis, being greater than 0.30 inch.
  • alloy 12 would behave similar to alloys 10 and 14 as it relates to filiform corrosion, so alloy 12 is considered a non invention alloy.
  • alloy 19 would behave similar to alloy 24 as it relates to filiform corrosion, so alloy 19 is considered a non-invention alloy.
  • alloys with too much solute e.g., alloys 1-8, 25-26, 28
  • the amount of Si+Mg+Cu+Zn is limited to not greater than 4.25 wt. %.
  • the specific amounts of silicon and magnesium are also important. Too little silicon (e.g., alloys 15 and 23) results in poor properties. Further, the Mg: Si ratio should be not greater than 1.4 as shown by alloys 15 and 25, whose high Mg: Si ratios were at least partially responsible for their poor strengths.

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Abstract

L'invention concerne de nouveaux alliages d'aluminium. Les nouveaux alliages d'aluminium peuvent comprendre de 0,70 à 1,4 % en poids de Si, de 0,70 à 1,3 % en poids de Mg, le rapport (% en poids de Mg)/(% en poids de Si) étant inférieur ou égal à 1,40, de 0,70 à 3,0 % en poids de Zn, de 0,55 à 1,3 % en poids de Cu, la quantité totale de Si + Mg + Zn + Cu étant inférieure ou égale à 4,25 % en poids, de 0,01 à 0,30 % en poids de Fe, jusqu'à 0,70 % en poids de Mn, jusqu'à 0,15 % en poids de Cr, jusqu'à 0,20 % en poids de Zr, jusqu'à 0,20 % en poids de V et jusqu'à 0,25 % en poids de Ti, le reste étant de l'aluminium, des éléments accidentels facultatifs et des impuretés. Les nouveaux alliages d'aluminium peuvent présenter une combinaison améliorée de propriétés, telle qu'une combinaison améliorée de résistance, d'aptitude au formage et/ou de résistance à la corrosion.
PCT/US2020/033806 2019-06-06 2020-05-20 Alliages d'aluminium renfermant du silicium, du magnésium, du cuivre et du zinc WO2020247178A1 (fr)

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CA3141154A CA3141154A1 (fr) 2019-06-06 2020-05-20 Alliages d'aluminium renfermant du silicium, du magnesium, du cuivre et du zinc
JP2021569878A JP2022534895A (ja) 2019-06-06 2020-05-20 ケイ素、マグネシウム、銅及び亜鉛を有するアルミニウム合金
EP20818378.0A EP3980569A4 (fr) 2019-06-06 2020-05-20 Alliages d'aluminium renfermant du silicium, du magnésium, du cuivre et du zinc
KR1020217038079A KR20220006078A (ko) 2019-06-06 2020-05-20 실리콘, 마그네슘, 구리 및 아연을 갖는 알루미늄 합금
CN202080040872.4A CN113924377A (zh) 2019-06-06 2020-05-20 具有硅、镁、铜和锌的铝合金
US17/456,212 US20220081741A1 (en) 2019-06-06 2021-11-23 Aluminum alloys having silicon, magnesium, copper and zinc

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KR20220006078A (ko) 2022-01-14
EP3980569A1 (fr) 2022-04-13
JP2022534895A (ja) 2022-08-04
US20220081741A1 (en) 2022-03-17
EP3980569A4 (fr) 2023-07-05
CN113924377A (zh) 2022-01-11
CA3141154A1 (fr) 2020-12-10

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