Clad aluminum alloy products and methods of making the same

Patent metadata

Field	Value
Publication number	US-2018304584-A1
Application number	US-201815959516-A
Country	US
Kind code	A1
Filing date	Apr 23, 2018
Priority date	Apr 24, 2017
Publication date	Oct 25, 2018
Grant date	—

Abstract

Provided herein are new clad aluminum alloy products and methods of making these alloys. These alloy products possess a combination of strength and other key attributes, such as corrosion resistance, formability, and joining capabilities. The alloy products can be used in a variety of applications, including automotive, transportation, and electronics applications.

First claim

What is claimed is:

1 . A clad aluminum alloy product, comprising:
a core layer comprising up to about 12.0 wt. % Zn, 1.0 to 4.0 wt. % Mg, 0.1 to 3.0 wt. % Cu, up to 0.60 wt. % Si, up to 0.50 wt. % Fe, up to 0.20 wt. % Mn, up to 0.20 wt. % Cr, up to 0.30 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum, wherein the core layer has a first side and a second side; and a first cladding layer on the first side of the core layer, wherein the first cladding layer comprises up to about 7.0 wt. % Zn, up to 6.0 wt. % Mg, up to 0.35 wt. % Cu, 0.05 to 13.5 wt. % Si, 0.10 to 0.90 wt. % Fe, up to 1.5 wt. % Mn, up to 0.35 wt. % Cr, up to 0.30 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum.

2 . The clad aluminum alloy product of claim 1 , wherein the core layer comprises about 5.0 to 9.5 wt. % Zn, 1.2 to 2.3 wt. % Mg, 0.10 to 2.6 wt. % Cu, up to 0.10 wt. % Si, up to 0.15 wt. % Fe, up to 0.05 wt. % Mn, up to 0.05 wt. % Cr, up to 0.25 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum.

3 . The clad aluminum alloy product of claim 1 , wherein the first cladding layer comprises up to about 6.0 wt. % Zn, 0.1 to 3.5 wt. % Mg, up to 0.3 wt. % Cu, 0.05 to 0.40 wt. % Si, 0.20 to 0.40 wt. % Fe, 0.10 to 0.80 wt. % Mn, up to 0.30 wt. % Cr, up to 0.25 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum.

4 . The clad aluminum alloy product of claim 1 , wherein the first cladding layer comprises up to about 1.3 wt. % Zn, 0.05 to 2.0 wt. % Mg, up to 0.35 wt. % Cu, 0.6 to 13.5 wt. % Si, 0.10 to 0.80 wt. % Fe, up to 0.80 wt. % Mn, up to 0.35 wt. % Cr, up to 0.30 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum.

5 . The clad aluminum alloy product of claim 1 , wherein the first cladding layer comprises up to about 0.5 wt. % Zn, 4.0 to 4.8 wt. % Mg, up to 0.1 wt. % Cu, 0.05 to 0.2 wt. % Si, 0.20 to 0.40 wt. % Fe, 0.1 to 0.8 wt. % Mn, up to 0.2 wt. % Cr, up to 0.25 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum.

6 . The clad aluminum alloy product of claim 1 , wherein the core layer has a thickness of about 0.5 to 3 mm.

7 . The clad aluminum alloy product of claim 6 , wherein the core layer has a thickness of about 0.7 to 2.3 mm.

8 . The clad aluminum alloy product of claim 7 , wherein the core layer has a thickness of about 2 mm.

9 . The clad aluminum alloy product of claim 1 , wherein the first cladding layer has a thickness of about 1 to 25% of a total thickness of the clad aluminum alloy product.

10 . The clad aluminum alloy product of claim 9 , wherein the first cladding layer has a thickness of about 1 to 12% of the total thickness of the clad aluminum alloy product.

11 . The clad aluminum alloy product of claim 10 , wherein the first cladding layer has a thickness of about 10% of the total thickness of the clad aluminum alloy product.

12 . The clad aluminum alloy product of claim 1 , further comprising a second cladding layer located on the second side of the core layer.

13 . The clad aluminum alloy product of claim 12 , wherein the first cladding layer and the second cladding layer comprise the same or different alloys.

14 . The clad aluminum alloy product of claim 12 , wherein the second cladding layer comprises up to about 7.0 wt. % Zn, up to 6.0 wt. % Mg, up to 0.35 wt. % Cu, 0.05 to 13.5 wt. % Si, 0.10 to 0.90 wt. % Fe, up to 1.5 wt. % Mn, up to 0.35 wt. % Cr, up to 0.30 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum.

15 . The clad aluminum alloy product of claim 12 , wherein the second cladding layer comprises up to about 6.0 wt. % Zn, 0.1 to 3.5 wt. % Mg, up to 0.3 wt. % Cu, 0.05 to 0.40 wt. % Si, 0.20 to 0.40 wt. % Fe, 0.10 to 0.80 wt. % Mn, up to 0.30 wt. % Cr, up to 0.25 wt. % Zr, up to 0.15 wt. % impurities, and the balance aluminum.

16 . The clad aluminum alloy product of claim 1 , wherein the clad aluminum alloy product has a yield strength up to 600 MPa.

17 . The clad aluminum alloy product of claim 16 , wherein the clad aluminum alloy product has a yield strength of 550 MPa.

18 . The clad aluminum alloy product of claim 1 , wherein the clad aluminum alloy product has an elongation up to 20%.

19 . The clad aluminum alloy product of claim 18 , wherein the clad aluminum alloy product has an elongation up to 15%.

20 . The clad aluminum alloy product of claim 1 , wherein the clad aluminum alloy product is a sheet, a plate, an electronic device housing, an automotive structural part, an aerospace structural part, an aerospace non-structural part, a marine structural part, or a marine non-structural part.

Assignees

• Novelis Inc

Inventors

• Kamat Rajeev G
• Mousavi-Anijdan Hashem
• Kulkarni Rahul Vilas
• Timm Juergen
• Bassi Corrado
• Wagstaff Robert Bruce
• Florey Guillaume
• Bezencon Cyrille
• Wagstaff Samuel R
• Leyvraz David

Classifications

• C22F1/053

  of alloys with zinc as the next major constituent · CPC title

• C22C21/02

  with silicon as the next major constituent · CPC title

• C22C21/08

  with silicon · CPC title

• C22C21/10 Primary

  with zinc as the next major constituent · CPC title

• B32B15/01

  all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} · CPC title