New aluminum alloys having bismuth and/or tin

Patent metadata

Field	Value
Publication number	US-2023087605-A1
Application number	US-202217989110-A
Country	US
Kind code	A1
Filing date	Nov 17, 2022
Priority date	May 26, 2020
Publication date	Mar 23, 2023
Grant date	—

Abstract

New aluminum alloys having an improved combination of properties are disclosed. In one approach, anew aluminum alloys may include from 0.50 to 3.0 wt. % of X, wherein X comprises (wt. % Bi+wt. % Sn), from 0.50 to 4.0 wt. % Si, from 0.30 to 2.5 wt. % Mg, up to 1.5 wt. % Cu, up to 2.0 wt. % Zn, from 0.05 to 1.5 wt. % Mn, up to 0.70 wt. % Fe, up to 0.35 wt. % of Cr, up to 0.25 wt. % each of Zr and V, and up to 0.15 wt. % Ti, the balance being aluminum, incidental elements and impurities. The new aluminum alloys may comprise at least 0.20 wt. % excess silicon.

First claim

What is claimed is:

1 . An aluminum alloy comprising:
from 0.50 to 3.0 wt. % of X, wherein X comprises (wt. % Bi+wt. % Sn); from 0.50 to 4.0 wt. % Si; from 0.30 to 2.5 wt. % Mg;
wherein the aluminum alloy comprises at least 0.20 wt. % excess silicon;
from 0.25 to 1.5 wt. % Cu; up to 2.0 wt. % Zn; from 0.05 to 1.5 wt. % Mn; up to 0.70 wt. % Fe; up to 0.35 wt. % of Cr; up to 0.25 wt. % each of Zr and V; up to 0.15 wt. % Ti; the balance being aluminum, optional incidental elements and impurities; wherein the aluminum alloy comprises at least 1.75 mol. % of Y, wherein Y is (mol. % Q-phase+mol. % Al 2 Cu+mol. % Mg 2 Si) as calculated using PANDAT and a temperature of 340° F.

2 . The aluminum alloy of claim 1 , comprising not greater than 0.4 wt. % Sn.

3 . The aluminum alloy of claim 1 , comprising not greater than 0.01 wt. % Sn.

4 . The aluminum alloy of claim 3 , comprising from 0.4 to 1.2 wt. % Bi.

5 . The aluminum alloy of claim 1 , comprising at least 0.30 wt. % excess silicon, wherein excess silicon is calculated from the formula ((wt. % Si)−((wt. % Fe)*0.333))−((wt. % Mg)/1.73).

6 . The aluminum alloy of claim 5 , comprising at least 0.70 wt. % Si.

7 . The aluminum alloy of claim 6 , comprising at least 0.40 wt. % Mg.

8 . The aluminum alloy of claim 7 , comprising at least 0.35 wt. % Cu.

9 . The aluminum alloy of claim 8 , comprising from 0.20 to 1.0 wt. % Zn

10 . The aluminum alloy of claim 9 , comprising from 0.10 to 0.5 wt. % Fe.

11 . The aluminum alloy of claim 10 , comprising from 0.10 to 0.60 wt. % Mn

12 . The aluminum alloy of claim 11 , comprising from 0.02 to 0.12 wt. % Ti.

13 . The aluminum alloy of claim 12 , wherein strontium is included in the aluminum alloy as an impurity.

14 . The aluminum alloy of claim 1 , wherein X is selected from the group consisting of Bi, Sn and mixtures thereof, and wherein indium is included in the aluminum alloy as an impurity, and wherein the aluminum alloy comprises less than 0.04 wt. % In.

15 . An aluminum alloy comprising:
from 0.65 to 1.15 wt. % of X, wherein X is selected from the group consisting of Bi, Sn, In, and combinations thereof; from 0.95 to 1.3 wt. % Si; from 0.45 to 0.70 wt. % Mg;
wherein the aluminum alloy comprises at least 0.30 wt. % excess silicon, wherein excess silicon is calculated from the formula ((wt. % Si)−((wt. % Fe)*0.333))−((wt. % Mg)/1.73);
from 1.0 to 1.4 wt. % Cu; up to 1.0 wt. % Zn; up to 1.5 wt. % Mn; up to 0.70 wt. % Fe; up to 0.35 wt. % of Cr; up to 0.25 wt. % each of Zr and V; up to 0.15 wt. % Ti; the balance being aluminum, optional incidental elements and impurities; wherein the aluminum alloy comprises at least 2.0 mol. % of Y, wherein Y is (mol. % Q-phase+mol. % Al 2 Cu+mol. % Mg 2 Si) as calculated using PANDAT and a temperature of 340° F.

16 . An aluminum alloy comprising:
from 0.5 to 1.4 wt. % of X, wherein X is selected from the group consisting of Bi, Sn, In, and combinations thereof; from 2.2 to 3.5 wt. % Si; from 1.1 to 2.5 wt. % Mg;
wherein the aluminum alloy comprises at least 0.50 wt. % excess silicon, wherein excess silicon is calculated from the formula ((wt. % Si)−((wt. % Fe)*0.333))−((wt. % Mg)/1.73);
up to 1.5 wt. % Cu; up to 2.0 wt. % Zn; up to 1.5 wt. % Mn; up to 0.70 wt. % Fe; up to 0.35 wt. % of Cr; up to 0.25 wt. % each of Zr and V; up to 0.15 wt. % Ti; the balance being aluminum, optional incidental elements and impurities.

Assignees

• Arconic Tech Llc

Inventors

• Bae Douglas S
• Berube Patrick
• Lin Jen C

Classifications

• C22F1/047

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

• C22F1/043

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

• C22C21/08

  with silicon · CPC title

• C22F1/053

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

• C22C21/003

  containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium · CPC title