US2022025489A1PendingUtilityA1
Aluminum Extrusion Alloy
Est. expiryDec 3, 2038(~12.4 yrs left)· nominal 20-yr term from priority
C22F 1/05C22F 1/043C22C 21/04B21C 23/00C22F 1/00C22C 21/02C22C 21/14C22C 21/06C22F 1/04C22C 21/08C22C 21/16
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Claims
Abstract
An aluminum alloy includes Si and Mg in amounts (wt. %) within a quadrilateral defined by the following coordinates on an Mg/Si plot: I: 1.15 Si, 0.70 Mg, II: 0.95 Si, 0.55 Mg; III: 0.75 Si, 0.65 Mg; and IV: 0.95 Si, 0.85 Mg. The alloy also includes, in weight percent: Mn 0.40-0.80 Fe 0.25 max Cr 0.05-0.18 Cu 0.30-0.90 Ti 0.05 max Zr 0.03 max Zn 0.03 max B 0.01 max with the remainder of the alloy being aluminum and unavoidable impurities in amounts of up to 0.05 wt. % each and 0.15 wt. % total.
Claims
exact text as granted — not AI-modified1 . An aluminum alloy comprising Si and Mg in amounts within a quadrilateral defined by the following coordinates on an Mg/Si plot, in weight percent:
I
1.15 Si, 0.70 Mg
II
0.95 Si, 0.55 Mg
III
0.75 Si, 0.65 Mg
IV
0.95 Si, 0.85 Mg
wherein the alloy further comprises, in weight percent:
Mn
0.40-0.80
Fe
0.25 max
Cr
0.05-0.18
Cu
0.30-0.90
Ti
0.05 max
Zr
0.03 max
Zn
0.03 max
B
0.01 max
with the remainder of the alloy being aluminum and unavoidable impurities in amounts of up to 0.05 wt. % each and 0.15 wt. % total.
2 . The alloy of claim 1 , wherein the Mg and Si are present in an Mg/Si ratio of no more than 0.88.
3 . The alloy of claim 1 , wherein the Mg and Si are present in an Mg/Si ratio of at least 0.69.
4 . The alloy of claim 1 , wherein the Mg and Si are present in an Mg/Si ratio of 0.69-0.88.
5 . The alloy of claim 1 , wherein the alloy includes excess Mg as defined by the following equation:
Excess Mg=Mg−(Si−(Mn+Fe+Cr)/3)/1.16 (all values in wt %).
6 . The alloy of claim 5 , wherein the alloy includes up to 0.40 wt. % excess Mg.
7 . The alloy of claim 1 , wherein the alloy, after homogenization, extrusion, and artificial ageing, has a predominantly non-recrystallized microstructure.
8 . (canceled)
9 . (canceled)
10 . The alloy of claim 1 , wherein the alloy includes Mg in an amount of 0.60-0.80 wt. % and Si in an amount of 0.85-1.10 wt. %.
11 . (canceled)
12 . The alloy of claim 1 , wherein the Si and Mg in amounts are within a quadrilateral defined by the following coordinates on the Mg/Si plot, in weight percent:
I
1.15 Si, 0.70 Mg
II
0.95 Si, 0.55 Mg
III′:
0.80 Si, 0.65 Mg
IV′:
0.95 Si, 0.80 Mg.
13 . An extruded product formed at least partially of the aluminum alloy of claim 1 .
14 . An aluminum alloy comprising, in weight percent:
Mg
0.60-0.80
Si
0.85-1.10
Mn
0.40-0.80
Fe
0.25 max
Cr
0.05-0.18
Cu
0.30-0.90
Ti
0.05 max
Zr
0.03 max
Zn
0.03 max
with the remainder of the alloy being aluminum and unavoidable impurities in amounts of up to 0.05 each and 0.15 total.
15 . The alloy of claim 14 , wherein the Mg and Si are present in an Mg/Si ratio of no more than 0.88.
16 . The alloy of claim 14 , wherein the Mg and Si are present in an Mg/Si ratio of at least 0.69.
17 . The alloy of claim 14 , wherein the Mg and Si are present in an Mg/Si ratio of 0.69-0.88.
18 . The alloy of claim 14 , wherein the alloy includes excess Mg as defined by the following equation:
Excess Mg=Mg−(Si−(Mn+Fe+Cr)/3)/1.16 (all values in wt %).
19 . The alloy of claim 18 , wherein the alloy includes up to 0.40 wt. % excess Mg.
20 . The alloy of claim 14 , wherein the alloy, after homogenization, extrusion, and artificial ageing, has a predominantly non-recrystallized microstructure.
21 . (canceled)
22 . (canceled)
23 . The alloy of claim 14 , wherein the alloy includes Mg in an amount of 0.70-0.80 wt. % and Si in an amount of 0.85-0.95 wt. %.
24 . An extruded product formed at least partially of the aluminum alloy of claim 14 .
25 . (canceled)
26 . A method comprising:
producing a billet of an aluminum alloy comprising:
Mg
0.60-0.80
Si
0.85-1.10
Mn
0.40-0.80
Fe
0.25 max
Cr
0.05-0.18
Cu
0.30-0.90
Ti
0.05 max
Zr
0.03 max
Zn
0.03 max
B
0.01 max
with the remainder of the alloy being aluminum and unavoidable impurities in amounts of up to 0.05 wt. % each and 0.15 wt. % total;
homogenizing the billet at a temperature of 540-580° C. for 2-10 hours; and
extruding the billet after homogenization to form an extruded product.Join the waitlist — get patent alerts
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