High strength 5xxx aluminum alloys and methods of making the same

Patent metadata

Field	Value
Publication number	US-2016355915-A1
Application number	US-201615172573-A
Country	US
Kind code	A1
Filing date	Jun 3, 2016
Priority date	Jun 5, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

Described herein are novel aluminum-containing alloys. The alloys are highly formable, exhibit high strength and corrosion resistance, and are recyclable. The alloys can be used in electronics, transportation, industrial, and automotive applications, just to name a few. Also described herein are methods for producing metal ingots and products obtained by the methods.

First claim

What is claimed is:

1 . An aluminum alloy comprising about 0.05-0.30 wt. % Si, 0.08-0.50 wt. % Fe, 0-0.60 wt. % Cu, 0-0.60 wt. % Mn, 4.0-7.0 wt. % Mg, 0-0.25 wt. % Cr, 0-0.20 wt. % Zn, 0-0.15 wt. % Ti, and up to 0.15 wt. % of impurities, with the remainder as Al.

2 . The aluminum alloy of claim 1 , comprising about 0.05-0.30 wt. % Si, 0.1-0.50 wt. % Fe, 0-0.60 wt. % Cu, 0.10-0.60 wt. % Mn, 4.5-7.0 wt. % Mg, 0-0.25 wt. % Cr, 0-0.20 wt. % Zn, 0-0.15 wt. % Ti, and up to 0.15 wt. % of impurities, with the remainder as Al.

3 . The aluminum alloy of claim 1 , comprising about 0.10-0.20 wt. % Si, 0.20-0.35 wt. % Fe, 0.01-0.25 wt. % Cu, 0.20-0.55 wt. % Mn, 5.0-6.5 wt. % Mg, 0.01-0.25 wt. % Cr, 0.01-0.20 wt. % Zn, 0-0.1 wt. % Ti, and up to 0.15 wt. % of impurities, with the remainder as Al.

4 . The aluminum alloy of claim 1 , comprising about 0.10-0.15 wt. % Si, 0.20-0.35 wt. % Fe, 0.1-0.25 wt. % Cu, 0.20-0.50 wt. % Mn, 5.0-6.0 wt. % Mg, 0.05-0.20 wt. % Cr, 0.01-0.20 wt. % Zn, 0-0.05 wt. % Ti, and up to 0.15 wt. % of impurities, with the remainder as Al.

5 . The aluminum alloy of claim 1 , comprising about 0.05-0.15 wt. % Si, 0.09-0.15 wt. % Fe, 0-0.05 wt. % Cu, 0-0.10 wt. % Mn, 4.0-5.5 wt. % Mg, 0-0.20 wt. % Cr, 0-0.05 wt. % Zn, 0-0.05 wt. % Ti, and up to 0.15 wt. % of impurities, with the remainder as Al.

6 . The aluminum alloy of claim 1 , wherein the alloy includes α-AlFeMnSi particles.

7 . The aluminum alloy of claim 1 , wherein the alloy is produced by direct chill casting.

8 . The aluminum alloy of claim 1 , wherein the alloy is produced by homogenization, hot rolling, cold rolling, and annealing.

9 . An automotive body part comprising the aluminum alloy of claim 1 .

10 . The automotive body part of claim 9 , wherein the automotive body part comprises an inner panel.

11 . An electronic device housing comprising the aluminum alloy of claim 1 .

12 . The electronic device housing of claim 11 , wherein the electronic device housing comprises an outer casing of a mobile phone or a tablet bottom chassis.

13 . A transportation body part comprising the aluminum alloy of claim 1 .

14 . A method of producing a metal product, comprising:
direct chill casting an aluminum alloy to form an ingot, wherein the aluminum alloy comprises about 0.05-0.30 wt. % Si, 0.08-0.50 wt. % Fe, 0-0.60 wt. % Cu, 0-0.6 wt. % Mn, 4.0-7.0 wt. % Mg, 0-0.25 wt. % Cr, 0-0.20 wt. % Zn, 0-0.15 wt. % Ti, up to 0.15 wt. % of impurities, with the remainder as Al; homogenizing the ingot to form a plurality of α-AlFeMnSi particles in the ingot; cooling the ingot to a temperature of 450° C. or less; hot rolling the ingot to produce a rolled product; allowing the rolled product to self-anneal; and cold rolling the rolled product to a final gauge.

15 . The method of claim 14 , further comprising cold rolling the rolled product to an intermediate gauge after the hot rolling step.

16 . A metal product, wherein the metal product is prepared by a method comprising the method of claim 14 .

17 . The metal product of claim 16 , wherein the metal product is an automotive body part.

18 . The metal product of claim 17 , wherein the automotive body part comprises an inner panel.

19 . The metal product of claim 16 , wherein the metal product is an electronic device housing.

20 . The metal product of claim 19 , wherein the electronic device housing comprises an outer casing of a mobile phone or a tablet bottom chassis.

21 . The metal product of claim 16 , wherein the metal product is a transportation body part.

Assignees

• Novelis Inc

Inventors

• Kadali Jyothi
• Gatenby Kevin Michael
• Kang Daehoon
• Das Sazol Kumar

Classifications

• H05K5/04

  Metal casings · CPC title

• C22F1/047 Primary

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

• C22C21/08 Primary

  with silicon · CPC title

• B62D29/008

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

• B22D11/003

  Aluminium alloys · CPC title