High-forming multi-layer aluminum alloy package

Patent metadata

Field	Value
Publication number	US-2017106919-A1
Application number	US-201615288088-A
Country	US
Kind code	A1
Filing date	Oct 7, 2016
Priority date	Oct 15, 2015
Publication date	Apr 20, 2017
Grant date	—

Abstract

Provided herein are novel, high-forming multi-layer aluminum alloy packages that include a core layer and one or more cladding layers. The alloy packages have excellent bake-hardening properties and are highly recyclable. The packages also display exceptional bendability and elongation properties. Also provided herein are novel aluminum alloy compositions for use as cladding layers. The compositions contain up to 0.6 wt. % Fe and one or more of Mn, Ni, Ti, Co, Nb, Cr, V, Zr, Hf and Ta.

First claim

What is claimed is:

1 . An aluminum alloy comprising about 0.2 to 0.6 wt. % Fe, 0.06 to 0.25 wt. % Mn, up to 0.5 wt. % Si, up to 0.5. % Cu, up to 1.5 wt. % Mg, up to 0.4 wt. % Zn, one or more additional elements selected from the group consisting of Ni, Ti, Co, Nb, Cr, V, Zr, Hf and Ta and up to 0.15 wt. % impurities, with the remainder as Al.

2 . The aluminum alloy of claim 1 , comprising about 0.25 to 0.55 wt. % Fe, 0.08 to 0.20 wt. % Mn, up to 0.25 wt. % Si, up to 0.25 wt. % Cu, up to 0.25 wt. % Mg, up to 0.20 wt. % Zn, one or more additional elements selected from the group consisting of Ni, Ti, Co, Nb, Cr, V, Zr, Hf and Ta and up to 0.15 wt. % impurities, with the remainder as Al.

3 . The aluminum alloy of claim 1 , comprising about 0.25 to 0.55 wt. % Fe, 0.08 to 0.20 wt. % Mn, up to 0.12 wt. % Si, up to 0.05 wt. % Cu, 0.3 to 1.2 wt. % Mg, up to 0.05 wt. % Zn, one or more additional elements selected from the group consisting of Ni, Ti, Co, Nb, Cr, V, Zr, Hf and Ta and up to 0.15 wt. % impurities, with the remainder as Al.

4 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Ti in an amount of from about 0.01 to 0.15 wt. %.

5 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises V in an amount of from about 0.01 to 0.2 wt. %.

6 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Ni in an amount of from about 0.01 to 0.60 wt. %.

7 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Co in an amount of from about 0.01 to 0.60 wt. %.

8 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Nb in an amount of from about 0.01 to 0.3 wt. %.

9 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Cr in an amount of from about 0.01 to 0.2 wt. %.

10 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Zr in an amount of from about 0.01 to 0.25 wt. %.

11 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Hf in an amount of from about 0.01 to 0.30 wt. %.

12 . The aluminum alloy of claim 1 , wherein the one or more additional elements comprises Ta in an amount of from about 0.01 to 0.20 wt. %.

13 . The aluminum alloy of claim 1 , comprising about 0.2 to 0.5 wt. % Fe, up to 0.25 wt. % Si, up to 0.25 wt. % Cu, 0.1 to 0.2 wt. % Mn, up to 0.1 wt. % Mg, up to 0.15 wt. % Cr, up to 0.20 wt. % Zn, up to 0.6 wt. % Ni, up to 0.12 wt. % Ti, up to 0.6 wt. % Co, up to 0.2 wt. % Nb, up to 0.18 wt. % V, up to 0.25 wt. % Zr, up to 0.30 wt. % Hf, up to 0.15 wt. % Ta and up to 0.15 wt. % impurities, with the remainder as Al.

14 . The aluminum alloy of claim 1 , wherein the combined content of Fe, Mn, Cr, Ti, Co, Ni, and V present in the alloy ranges from about 0.60 wt. % to 0.90 wt. %.

15 . The aluminum alloy of claim 1 , wherein the aluminum alloy forms a sheet having a grain size of from about 10 microns to 30 microns.

16 . The aluminum alloy of claim 1 , wherein the aluminum alloy forms a sheet having a grain size of from about 15 microns to 25 microns.

17 . A multi-layer metal sheet comprising:
a core layer, and a first cladding layer comprising an aluminum alloy comprising about 0.2 to 0.6 wt. % Fe, 0.06 to 0.25 wt. % Mn, up to 0.5 wt. % Si, up to 0.5. % Cu, up to 1.5 wt. % Mg, up to 0.4 wt. % Zn, one or more additional elements selected from the group consisting of Ni, Ti, Co, Nb, Cr, V, Zr, Hf and Ta and up to 0.15 wt. % impurities, with the remainder as Al. wherein the core layer comprises a first side and a second side, and the first cladding layer is on the first side or the second side.

18 . A multi-layer metal sheet of claim 17 , wherein the cladding layer comprises Fe, Mn, Cr, Ti, Co, Ni and V such that the total weight-percent (wt. %) of the Fe, Mn, Cr, Ti, Co, Ni, and V is between 0.60 wt. % and 0.90 wt. %.

19 . The multi-layer metal sheet of claim 17 , wherein the core layer comprises an AA6xxx alloy, an AA2xxx alloy, an AA5xxx alloy, or an AA7xxx alloy.

20 . The multi-layer metal sheet of claim 17 , further comprising a second cladding layer on the core layer, wherein the second cladding layer comprises the aluminum alloy of claim 1 .

21 . The multi-layer metal sheet of claim 20 , wherein the first side of the core layer is adjacent to the first cladding layer to form a first interface and the second side of the core layer is adjacent to the second cladding layer to form a second interface.

22 . A product prepared from the multi-layer metal sheet of claim 17 , wherein the product is a motor vehicle body part.

23 . The product of claim 22 , wherein the motor vehicle body part is a body side panel.

24 . A product prepared from the multi-layer metal sheet of claim 18 , wherein the product is a motor vehicle body part.

25 . The product of claim 24 , wherein the motor vehicle body part is a body side panel.

Assignees

• Novelis Inc

Inventors

• Florey Guillaume
• Bezencon Cyrille
• Bassi Corrado
• Timm Juergen
• Despois Jean-Francois
• Stadlin Jacques

Classifications

• B32B15/016 Primary

  all layers being formed of aluminium or aluminium alloys · CPC title

• B62D29/008 Primary

  predominantly of light alloys, e.g. extruded · CPC title

• C22C21/08

  with silicon · CPC title

• B22D7/005 Primary

  from non-ferrous metals · CPC title

• C22F1/04

  of aluminium or alloys based thereon · CPC title