6XXX aluminum alloys, and methods for producing the same

Patent metadata

Field	Value
Publication number	US-9890443-B2
Application number	US-201313774702-A
Country	US
Kind code	B2
Filing date	Feb 22, 2013
Priority date	Jul 16, 2012
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

New 6xxx aluminum alloys are disclosed. The new 6xxx aluminum alloys may include 1.05-1.50 wt. Mg, 0.60-0.95 wt. % Si, where the (wt. % Mg)/(wt. % Si) is from 1.30 to 1.90, 0.275-0.50 wt. % Cu, and from 0.05 to 1.0 wt. % of at least one secondary element, wherein the secondary element is selected from the group consisting of V, Fe, Cr, Mn, Zr, Ti, and combinations thereof.

First claim

What is claimed is:

1. A forged 6xxx aluminum alloy wheel product consisting of:
(a) 1.05-1.50 wt. Mg;
(b) 0.65-0.95 wt. % Si;
wherein (wt. % Mg)/(wt. % Si) is from 1.40 to 1.90;

(c) 0.275-0.50 wt. % Cu;
(d) from 0.15-0.60 wt. % of at least one secondary element, wherein the secondary element is selected from the group consisting of V, Fe, Cr, Mn, Zr, Ti, and combinations thereof;
wherein at least V is present and wherein the forged 6xxx aluminum alloy wheel product includes from 0.05 wt. % to 0.25 wt. % V as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.30 wt. % Fe as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.25 wt. % Mn as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.30 wt. % Cr as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.18 wt. % Zr as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.10 wt. % Ti as a secondary element;

(e) the balance being aluminum and other elements, wherein each one of the other elements does not exceed 0.05 wt. % in the forged 6xxx aluminum alloy wheel product, and wherein the total of the other elements is not more than 0.15 wt. % in the forged 6xxx aluminum alloy wheel product;
wherein the forged 6xxx aluminum alloy wheel product realizes a longitudinal tensile yield strength of at least 49 ksi and an elongation of at least 10% when tested in accordance with ASTM E8 and B557.

2. The forged 6xxx aluminum alloy wheel product of claim 1 , wherein the Si content is 0.70-0.95 wt. %.

3. The forged 6xxx aluminum alloy wheel product of claim 2 , wherein the Mg content is 1.10-1.50 wt. %.

4. The forged 6xxx aluminum alloy wheel product of claim 3 , wherein the Cu content is 0.30-0.50 wt. %.

5. The forged 6xxx aluminum alloy wheel product of claim 4 , wherein the V content is 0.05 to 0.20 wt. %.

6. The forged 6xxx aluminum alloy wheel product of claim 4 , wherein the V content is 0.06 to 0.14 wt. %.

7. The forged 6xxx aluminum alloy wheel product of claim 1 , wherein the Si content is 0.65-0.90 wt. %.

8. The forged 6xxx aluminum alloy wheel product of claim 7 , wherein the Mg content is 1.05-1.40 wt. %.

9. The forged 6xxx aluminum alloy wheel product of claim 1 , wherein the Si content is 0.65-0.85 wt. %.

10. The forged 6xxx aluminum alloy wheel product of claim 9 , wherein the Mg content is 1.05-1.35 wt. %.

11. The forged 6xxx aluminum alloy wheel product of claim 1 , wherein the Si content is 0.65-0.80 wt. %.

12. The forged 6xxx aluminum alloy wheel product of claim 11 , wherein the Mg content is 1.05-1.30 wt. %.

13. A forged 6xxx aluminum alloy wheel product consisting of:
(a) 1.05-1.50 wt. Mg;
(b) 0.65-0.95 wt. % Si;
wherein (wt. % Mg)/(wt. % Si) is from 1.40 to 1.90;

(c) 0.275-0.50 wt. % Cu;
(d) from 0.15-0.60 wt. % of at least one secondary element, wherein the secondary element is selected from the group consisting of V, Fe, Cr, Mn, Zr, Ti, and combinations thereof;

wherein at least V is present and wherein the forged 6xxx aluminum alloy wheel product includes from 0.05 wt. % to 0.25 wt. % V as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.30 wt. % Fe as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.25 wt. % Mn as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.30 wt. % Cr as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.18 wt. % Zr as a secondary element;
wherein, when present, the forged 6xxx aluminum alloy wheel product includes not greater than 0.10 wt. % Ti as a secondary element;
(e) the balance being aluminum and other elements, wherein each one of the other elements does not exceed 0.05 wt. % in the forged 6xxx aluminum alloy wheel product, and wherein the total of the other elements is not more than 0.15 wt. % in the forged 6xxx aluminum alloy wheel product;
wherein the forged 6xxx aluminum alloy wheel product realizes a longitudinal tensile yield strength of at least 45 ksi and an elongation of at least 8% when tested in accordance with ASTM E8 and B557; and
wherein the forged wheel product realizes an average radial fatigue life of at least 1,000,000 cycles as tested in accordance with SAE (Society of Automobile Engineers) Standard No. J267 (2007), with a 2.8× load factor applied.

14. The forged 6xxx aluminum alloy wheel product of claim 13 , wherein the forged 6xxx wheel product realizes an average radial fatigue life of at least 1,050,000 cycles.

15. The forged 6xxx aluminum alloy wheel product of claim 13 , wherein the forged 6xxx wheel product realizes an average radial fatigue life of at least 1,100,000 cycles.

16. The forged 6xxx aluminum alloy wheel product of claim 13 , wherein the forged 6xxx wheel product realizes an average radial fatigue life of at least 1,150,000 cycles.

17. The forged 6xxx aluminum alloy wheel product of claim 13 , wherein the forged 6xxx wheel product realizes an average radial fatigue life of at least 1,200,000 cycles.

18. The forged 6xxx aluminum alloy wheel product of claim 13 , wherein the forged 6xxx aluminum alloy wheel product realizes a longitudinal tensile yield strength of at least 47 ksi and an elongation of at least 10% when tested in accordance with ASTM E8 and B557.

19. The forged 6xxx aluminum alloy wheel product of claim 13 , wherein the forged 6xxx aluminum alloy wheel product realizes a longitudinal tensile yield strength of at least 49 ksi and an elongation of at least 10% when tested in accordance with ASTM E8 and B557.

Assignees

• Arconic Inc

Inventors

• Lin Jen C
• Rovito Anton J
• Doyle Timothy P
• Sullivan Shawn P
• Ciccola Gabriele F
• Tan Christopher J

Classifications

• C22C21/08 Primary

  with silicon · CPC title

• C22F1/047

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

• C22F1/05

  of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions · CPC title